JP6549431B2 - Method for producing oil substance-containing gel composition - Google Patents

Description

  The present invention relates to a method for producing an oil-containing gel composition and an oil-containing gel composition.

  Conventionally, in various fields such as cosmetics, pharmaceuticals, foods, paints, inks, lubricating oils, etc., it contains various oily substances such as animal and vegetable oils, mineral oils and hydrocarbons, a gelling agent, and an aqueous solvent. An oil-containing gel composition gelled by the gelling agent is used. The oil substance-containing gel composition is formed by gelling the solution in a state where the oil substance is emulsified in a solution in which the gelling agent is dissolved in an aqueous solvent.

  In this kind of oil substance-containing gel composition, as a gelling agent, those derived from natural polysaccharides are used because they are relatively safe for the human body. As a gelling agent derived from natural polysaccharides, starch, agar, gelatin, carrageenan, locust bean gum, pectin, sodium alginate, xanthan gum, galactoxyloglucan, gellan gum, curdlan and the like are used.

  In order to produce a gel composition using these gelling agents, it is necessary to stir and dissolve the gelling agent in water at a high temperature such as 80 ° C. or higher.

  However, when the gelling agent is dissolved at high temperature and then cooled, the solution is gelled, and when the oily substance is added and mixed in this state, the gel structure is broken, and the oily substance-containing gel composition becomes I can not get it. For this reason, after dissolving the gelling agent at high temperature, it has to be mixed with the oily substance at this high temperature, and it is difficult to say that the preparation is simple.

  In addition, if the solution and the oily substance are mixed in a high temperature state, the emulsification of the oily substance becomes unstable, and it becomes difficult to sufficiently contain the oily substance.

  Furthermore, the above gelling agent is likely to form lumps upon dissolution. When dams are formed, a powdery solid (non-hydrate) caused by non-hydrated polysaccharide remains in the obtained oil-containing gel composition and the quality is lowered. Become. Therefore, it is necessary to eliminate the lumps, but it takes a lot of time and effort to completely hydrate and dissolve the polysaccharides that have once become lumped.

  As described above, it is difficult to say that the oily substance-containing gel composition using the above-mentioned gelling agent contains an oily substance sufficiently, and it can not be said that it can be easily prepared.

On the other hand, galactose of galactoxyloglucan obtained by removing galactose, which constitutes a part of the side chain of galactoxyloglucan, by partially degrading (partially degrading) using purified .beta.-galactosidase derived from a microorganism Partial decomposition products (hereinafter sometimes simply referred to as "galactose partial decomposition products or partial decomposition products") have been proposed (see Patent Documents 1 and 2). Such a galactose partial decomposition product has a thermal behavior of the mixture when the galactose partial decomposition product and an aqueous solvent are mixed is opposite to the thermal behavior of the galactoxyloglucan, specifically, it is gelled when heated Upon cooling, it sols and exhibits a thermal behavior that the change of this sol / gel is reversible. Such thermal behavior is called reversible thermal gelation properties.
Moreover, since the galactose partial decomposition product is derived from a natural polysaccharide and is safe for the human body and the environment because it is not chemically modified (added), a gel composition produced using the galactose partial decomposition product is It can be widely used in food, cosmetics, pharmaceutical preparations and the like.
As a method for producing a gel composition containing this kind of galactose partial decomposition product, a cooled aqueous solvent and galactose partial decomposition product are mixed, the galactose partial decomposition product is dissolved in the aqueous solvent, and the solution is heated to form a gel. It has been proposed to produce a gel composition by converting it into a gel (see Patent Documents 1 and 2).

JP-A-8-283305 WO 97/29777

In the methods of Patent Documents 1 and 2 above, when producing a gel composition, the galactose partial decomposition product is dissolved in a cooled aqueous solvent, and this aqueous solution is mixed with an oily substance to emulsify the oily substance. It is possible to contain an oily substance.
However, according to the method of Patent Document 1, it is difficult to say that the oily substance is sufficiently contained.

In addition, in the methods of Patent Literatures 1 and 2, it is necessary to continue to cool the aqueous solvent and mix the galactose partial decomposition product with it, which requires preparation time and labor.
Moreover, in these methods, the viscosity of the mixture may be too high, and it may be difficult to handle when attempting to gelate by transferring to a desired container and heating. In addition, it may be difficult to sufficiently fill a desired container, or air bubbles may be easily mixed at the time of solution preparation, filling, and the like.
Thus, even if the methods of Patent Documents 1 and 2 are used, it is difficult to say that the oily substance-containing gelling composition can be easily produced.

  In view of the above circumstances, the present invention provides a method for producing an oily substance-containing gel composition capable of conveniently producing an oily substance-containing gel composition sufficiently containing an oily substance, and an oily substance containing a sufficient oily substance. It is an object to provide a gel composition.

The present inventors earnestly studied to solve the above problems, and obtained the following findings.
That is, in general, it is known that when polysaccharides are mixed with an aqueous solvent, the polysaccharides first become in a hydrated and swollen state by water in the aqueous solvent and reach a dissolved state when the hydration and swelling proceed further. It is done.
As a result of considering this and the methods of Patent Documents 1 and 2, in the methods of Patent Documents 1 and 2, since the galactose partial decomposition product is mixed with the cooled aqueous solvent and dissolved, the solution The viscosity is relatively high and as a result it becomes difficult to handle.
In addition, the lower the temperature by cooling the aqueous medium, the time required for the galactose partial decomposition product to be in a hydrated and swollen state, and further, the time for the hydrated and swollen state to be in a dissolved state In the method of Patent Document 1 mentioned above, the viscosity is developed early, and relatively strong forced agitation is required to uniformly diffuse the galactose partial decomposition product into the aqueous solvent.

Based on these findings, the inventors of the present invention have conducted further intensive studies, and by mixing the aqueous solvent and the galactose partial decomposition product at room temperature, the galactose moiety in the aqueous solvent is not generated in the mixture. It has been found that the degradation products can be dispersed.
Also, this mixing at room temperature tends to cause the galactose partial decomposition product to be hardly dissolved in the aqueous solvent, and as a result, the viscosity of the mixture can be lowered. Then, by cooling or freezing the low viscosity mixture in this way, it becomes easy to bring the galactose partial decomposition product into a high viscosity hydration and swelling state rather than a dissolved state in an aqueous solvent, resulting in the viscosity of the mixture It can be expensive.
Moreover, since it is not necessary to cool the aqueous solvent in advance, the preparation time and labor can be saved accordingly.
And, it has been found that even if heating a mixture in which many of the galactose partial decomposition products are in a hydrated and swollen state, the mixture can be gelled, and a gel composition can be obtained.

Furthermore, the inventors of the present invention conducted intensive studies to find that a mixture obtained by mixing an galactose partial decomposition product, water, and an oil-like substance is cooled or frozen as described above, and then oily. It has been found that an oil-containing gel composition is obtained which contains the substance sufficiently.
In addition, the mixture obtained by mixing the galactose partial decomposition product and water is cooled or frozen, and heated to room temperature to thaw, and then the oily substance is added, further mixed, and heated. It has been found that an oil-containing gel composition is obtained which contains the substance sufficiently.
Furthermore, when the same galactose partial decomposition product is added as compared with the methods of Patent Documents 1 and 2 in which the galactose partial decomposition product is dissolved in a cooled aqueous medium by containing an oil substance in this way, more It has been found that it can contain an oily substance of
Thus, the mixture obtained by mixing the galactose partial hydrolyzate and water is cooled or frozen, and then the oil is sufficiently contained by adding the oil before the mixture gels. It has been found that an oil-containing material-containing gel composition can be easily produced, and the present invention has been completed.

That is, the method for producing an oily substance-containing gel composition according to the present invention is
A method for producing an oil-containing gel composition containing an oil, comprising:
Step (1): A step of obtaining a mixture by mixing galactose partial degradation product of galactoxyloglucan and an aqueous solvent at room temperature;
Step (2): cooling or freezing the mixture obtained in the step (1);
Step (3): gelling the mixture obtained in the step (2) by heating to obtain a gel composition.
In at least one of the steps (1) to (3) and before the mixture obtained in the step (2) is gelled, the oily substance is added.

Here, "room temperature" means the temperature within the temperature range of 15-35 degreeC. Moreover, "mixing at room temperature" means mixing with the temperature of the aqueous solvent at room temperature.
"Cooling" means that the mixture of the aqueous solvent and the galactose partial decomposition product is not in a solid state by lowering the temperature, and when it is liquid or solid, ie, frozen It also includes the state in which both are mixed.
"Freezing" means that the mixture of the aqueous solvent and the galactose partial decomposition product becomes solid by lowering its temperature.

  According to this configuration, the oil-like substance is added in at least one of the steps (1) to (3) and before the mixture obtained in the step (2) is gelled. 1) to (3) can be performed.

At this time, in step (1), the galactose partially degraded galactoxyloglucan and the aqueous solvent are mixed at room temperature to dissolve the inorganic compound in the aqueous medium and generate no lumps in the mixture. The galactose partial degradation product can be dispersed in an aqueous solvent.
In the step (2), the galactose partial decomposition product can be hydrated and swollen in an aqueous solvent by cooling or freezing the mixture obtained in the step (1). At this time, it becomes easy to make the galactose partial decomposition product be in a hydrated and swollen state rather than in a dissolved state. Thereby, the viscosity of the mixture (dispersion liquid) can be lowered, and by cooling or freezing, the mixture can be made into a highly viscous hydrated swelling material.
Furthermore, since the viscosity development can be relatively delayed, the galactose partial degradation product can be sufficiently dispersed in the aqueous medium without performing the conventional relatively strong forced agitation.
As described above, according to the steps (1) and (2), the aqueous solvent does not have to be cooled in advance, so that preparation time and labor can be saved accordingly.
Furthermore, the mixture can be gelated by heating the mixture obtained in step (2) to gelation in step (3). At this time, the gel composition obtained is such that contamination of non-hydrates such as damas due to galactose partial decomposition products is suppressed.

And, in at least one of the steps (1) to (3), and before the mixture obtained in the step (2) is gelled, it is not gelled by adding an oily substance, Also, a mixture containing an oily substance (an oily substance-containing mixture) is obtained, and by heating the mixture, the oily substance is incorporated and included between molecules of the galactose partial decomposition product in the above-mentioned hydrated swelling ( It can be gelled while emulsifying, whereby an oil-containing gel composition can be obtained.
In addition, in the oil-containing material-containing gel composition thus obtained, the added oil-like material is stably incorporated therein without being separated from the gel composition, and the oil-containing material is sufficiently contained. .

  Therefore, according to the above-mentioned production method, an oily substance-containing gel composition which sufficiently contains an oily substance can be conveniently produced.

The term "dispersion" means that the whole powdery galactose partial decomposition product is infiltrated with the aqueous solvent, but the galactose part is formed in a state in which a high viscosity (adhesive) layer is hardly formed on the surface layer. It means that the decomposition product is present in the aqueous solvent.
The term "hydration swelling" refers to a state in which the totally powdered galactose partial decomposition products sufficiently absorb the aqueous solvent, and the respective galactose partial decomposition products form a highly viscous state as a whole.
"Dissolution" means a state in which the polysaccharide molecular chain dissociates from the highly viscous surface layer and diffuses from the surface layer into the solvent.
Also, "Dama" means the state in which the powdery galactose partial decomposition products are collected (the state of the collection)
Contact with water, and while the air layer is contained inside the aggregate, only the outer layer of the aggregate becomes highly viscous by contact with water, which makes it difficult for the aqueous solvent to penetrate into the interior of the aggregate. , Means a state of lumps as a whole, or a state in which the lumps are further gathered.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
In the step (1), the oily substance may be added.

According to this configuration, the galactose partial decomposition product, the aqueous solvent, and the oil are mixed in step (1) to obtain a mixture, and the obtained mixture is cooled or frozen in step (2), The galactose partial decomposition product in the mixture is hydrated and swelled in an aqueous solvent, thereby obtaining an oil-containing mixture in which the hydrated swelling product and the oily substance are mixed. And while incorporating the oily substance added in the step (1) between molecules of the galactose partial decomposition product by heating the hydrated swollen substance in the oily substance-containing mixture in the step (3) (while emulsifying) The oil-containing mixture can be gelled.
This allows the oil to be mixed at room temperature. In addition, since necessary raw materials can be charged at relatively early steps, the production becomes easier.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
In the step (3), the oily substance may be added before the mixture obtained in the step (2) is gelled.

According to this configuration, in step (2), the galactose partial decomposition product hydrates and swells in an aqueous solvent, thereby obtaining a hydrated swelling product as a mixture thereof. Then, in step (3), an oil-containing mixture can be obtained by adding the oil before gelation of the hydrated swelling product, and the galactose moiety can be obtained by heating the oil-containing mixture. The oil-containing mixture can be gelled while incorporating (emulsifying) the oil between the molecules of the degradation product.
As a result, an oil-like substance can be added in a state in which the hydrated swelling material is already sufficiently formed and the molecules of the galactose partial degradation product constituting the hydrated swelling material are relatively large. A relatively large amount of oily substances can be incorporated between the molecules of the degradation product.
Thus, an oil-containing gel composition can be produced which contains the oil more sufficiently.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
When adding the oily substance in the step (1),
It is preferable to add 0.01 to 20 parts by mass of the oily substance to 1 part by mass of the galactose partial decomposition product.

  According to this configuration, the mixture of galactose partial decomposition products can be stably included without separating the oily substance, and in addition, the oily substance can be held more stably.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
In the step (2), when the mixture obtained in the step (1) is frozen,
In the step (3), the mixture obtained in the step (2) is preferably thawed and the oily substance is added.

According to this configuration, since the mixture and the oily substance can be mixed in a state where the mixture frozen in step (2) is thawed, these can be mixed sufficiently.
Thus, the oily substance can be contained more sufficiently.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
When adding the oily substance in the step (3),
0.01 to 700 parts by mass of the oily substance may be added to 100 parts by mass of the mixture obtained in the step (2).

  According to such a configuration, it becomes possible to stably include the oily substance in the hydrated swelling product of the galactose partial decomposition product without further separation, in a relatively wide range from relatively small amount to relatively large amount, and additionally It is also possible to keep the oil more stable in the gel composition.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
1 to 50 parts by mass of the oily substance may be added to 100 parts by mass of the mixture obtained in the step (2).

  According to this configuration, it is possible to stably include the oily substance in the hydrated swelling product of the galactose partial decomposition product without further separating the oily substance, and additionally, the oily substance is further stably retained in the gel composition. Is also possible.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
It is preferable to add 50 to 700 parts by mass of the oily substance to 100 parts by mass of the mixture obtained in the step (2).

  According to such a configuration, it is possible to make a gel composition that contains a relatively large amount of an oily substance.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
In the said process (1), it is preferable to mix the said galactose partial decomposition product and the said aqueous solvent at 18-30 degreeC.

  According to this configuration, by mixing galactose partial hydrolyzate with the aqueous solvent at 18 to 30 ° C., galactose partial hydrolyzate is further dissolved in the aqueous solvent in a normal room temperature environment while further avoiding formation of dams. It can be dispersed. Therefore, the decrease in workability can be further suppressed.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
It is preferable that the compounding quantity of the said galactose partial decomposition product in the said gel composition is 0.05-20 mass%.

According to this configuration, when the content of the galactose partial decomposition product is 0.05 to 20% by mass with respect to the total amount of the gel composition, the oily substance can be contained more sufficiently, and It can be stably included in the hydrated swelling product of the galactose partial decomposition product without separating the oily substance.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
In the step (1), the obtained mixture preferably contains 1 to 10% by mass of the galactose partial decomposition product.

  According to this configuration, the mixture obtained in the step (1) contains 1 to 10% by mass of the galactose partial decomposition product, whereby the oily substance is further separated into the hydrated swelling product of the galactose partial decomposition product. Can be included stably.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
In the said process (2), it is preferable to cool or freeze the mixture obtained by the said process (1) to -25-10 degreeC.

  According to this configuration, the galactose partial decomposition product can be hydrated and swelled more appropriately, so that the oily substance can be contained more sufficiently.

In the method of producing the oil-containing material-containing gel composition of the above-mentioned constitution,
The oily substance is preferably liquid or semisolid at normal temperature.

  According to this configuration, it becomes easier to mix the hydrated swelling product of the galactose partial decomposition product and the oily substance.

The oily substance-containing gel composition of the present invention is
Contains a galactose partial degradation product of galactoxyloglucan, an aqueous solvent, and an oily substance, and
The oily substance is contained in 0.01 to 90% by mass.

  According to this configuration, the oil-based material-containing gel composition becomes one in which the oil-based material is sufficiently contained.

In the oily substance-containing gel composition of the above constitution,
It is preferable to contain 0.05-20 mass% of said galactose partial decomposition products.

  According to this configuration, the oily substance can be contained more stably.

  As described above, according to the present invention, a method for producing an oily substance-containing gel composition capable of conveniently producing an oily substance-containing gel composition sufficiently containing an oily substance, and an oily substance sufficiently containing an oily substance Provided gel compositions are provided.

  Hereinafter, embodiments of a method for producing a gel composition according to the present invention and a gel composition produced by the method will be described.

The method for producing the oily substance-containing gel composition of the present embodiment is
A method for producing an oil-containing gel composition containing an oil, comprising:
Step (1): A step of obtaining a mixture by mixing galactose partial degradation product of galactoxyloglucan and an aqueous solvent at room temperature;
Step (2): cooling or freezing the mixture obtained in the step (1);
Step (3): gelling the mixture obtained in the step (2) by heating to obtain a gel composition.
In at least one of the steps (1) to (3) and before the mixture obtained in the step (2) is gelled, the oily substance is added.

  The galactose partial degradation product of galactoxyloglucan used in the production method of the present embodiment means a substance obtained by partial degradation and removal of side chain galactose of galactoxyloglucan, hereinafter abbreviated as galactose partial degradation product There is also. In addition, galactoxyloglucan means galactoxyloglucan (completely galactoxyloglucan) in which side chain galactose is not removed by partial decomposition by the enzyme treatment described later. Such complete galactoxyloglucan may also be referred to as native galactoxyloglucan.

  Galacto xyloglucan is a component of the cell wall (primary wall) of higher plants such as dicotyledonous and monocotyledonous plants and also exists as a storage polysaccharide for some plant seeds. Galacto xyloglucan has glucose, xylose and galactose as constituent sugars, and in the main chain, glucose is β-1,4 linked, and xylose is attached to the side chain, and galactose is attached to the xylose. Although galactoxyloglucan itself does not gel, it gels in the presence of sugars, ions or alcohols.

  The galactoxyloglucan may be any plant-derived galactoxyloglucan and can be obtained, for example, from seeds of tamarind, jatoba, nastatium seeds, soybeans such as soybeans, mung beans, kidney beans, rice, barley, etc. or fruits such as apples. It is preferably a galactoxyloglucan derived from a leguminous plant tamarind seed because it is the most readily available and the content is also high. A commercially available thing can be employ | adopted as this galactoxyloglucan.

  The galactose partial decomposition product used in the manufacturing method of the present embodiment is manufactured, for example, by the following manufacturing method. That is, galactoxyloglucan derived from the above-mentioned tamarind seed is maintained at 55 ° C. and then adjusted to pH 6 with trisodium citrate, β-galactosidase is added, and reaction is carried out at 50 to 55 ° C. for 16 hours while stirring. Next, the enzyme is inactivated by heating at 95 ° C. for 30 minutes, then brought to room temperature, added with an equal volume of ethanol, and left to stand for 1 hour. The precipitate obtained upon standing is collected by suction filtration, dried by means of a fan dryer and then pulverized.

  The β-galactosidase to be used may be either of plant origin or microorganism origin, but an enzyme derived from the microorganism Aspergillus oriza or Bacillus circulans or an enzyme in a galactoxyloglucan-containing seed is preferred. A commercially available thing can be employ | adopted as this (beta) -galactosidase.

  In this enzyme reaction by β-galactosidase, side chain galactose is partially removed as the reaction proceeds, and the reaction solution is rapidly thickened and gelated when the removal rate reaches about 30%. When the removal rate of galactose is in the range of 30 to 55%, the gelation is caused by heating and it has a reversible heat-responsive gelation property that is solified by cooling. If the galactose removal rate is less than 30%, gelation does not occur, and if it exceeds 55%, an excessively firm gel tends to be obtained (see JP-A-8-283305 and WO 97/29777).

  In consideration of this point, it is preferable to use the above galactose partial decomposition product in which galactose is partially decomposed 30 to 55%. By setting the removal rate in this range, it is possible to produce a gel composition that does not become too strong while sufficiently causing gelation by heating. As a result, reversibly, gelation is sufficiently gelated by heating, and reversibly heat-responsive gelation properties which sufficiently solify by cooling are easily exhibited. In addition, removal of 30 to 55% of galactose makes it possible to more stably include the oily substance in the hydrated swelling product of the galactose partial decomposition product.

Further, as described above, the galactose partial degradation product in which galactose is partially degraded is 30 to 55%, and as described above, galactose is partially degraded 30 to 55% from galactoxyloglucan.
Galacto xyloglucans usually contain about 37% of side chain xylose and about 17% of side chain galactose (see Gidley et al. Carbohydrate Research, 214 (1991) pp. 219-314). Therefore, it is calculated that the galactose partial decomposition product in which 30 to 55% of galactose is partially decomposed contains 39 to 41% of side chain xylose and 8 to 12% of side chain galactose.
The partial degradation rate of galactose (that is, the removal rate of galactose) is determined by high-performance liquid chromatography (HPLC) (amino acid) of the amount of galactoxyloglucan oligosaccharides produced by cellulase degradation of the resulting partially degraded product. It can calculate by measuring by column.

  The aqueous solvent is not particularly limited as long as it is a solvent containing water and it can dissolve the galactose partial decomposition product.

The oily substance is one that is incorporated into and included in the hydrated swelling material dispersed in an aqueous medium, which is formed by cooling or freezing the above-mentioned dispersion.
The oily substance is not particularly limited, but those having compatibility with the galactose partial decomposition product in the hydrated swelling material can be used.

The oily substance is preferably liquid or semisolid at normal temperature.
The oily substance, which is liquid or semisolid at normal temperature, is easy to mix with the hydrated swelling product of galactose partial decomposition product.

  The liquid or semi-solid oily substance at normal temperature is not particularly limited, but it may be olive oil, castor oil, avocado oil, macadamian nut oil, safflower oil, sesame oil, soybean oil, soybean oil, camellia oil, rapeseed oil such as cotton seed oil, canola oil, almond Oils such as egg yolk oil, tota oil, horse oil, fish oil, lanolin, squalane, petrolatum, liquid paraffin, isoparaffin, kerosene, mineral spirits, hydrocarbons such as mineral spirits, xylene, liquid paraffin, chain-like Or cyclic silicone oils, fatty acid alkyl esters (eg, isocetyl isostearate, cetyl octanoate, cetostearyl octanoate, decyl oleate, cetyl 2-ethylhexanoate, isocetyl stearate, isoviryl myristate, octyldodecyl myristate , Hexyl laurate Fatty acid esters such as oleic acid, arachidonic acid, isostearic acid, undecylic acid, soft lanolinic acid, linoleic acid, linoleic acid, linolenic acid, caprylic acid etc., higher fatty acids, isostearyl alcohol, oleyl alcohol, octyldodecyl alcohol, hexyl Examples thereof include higher alcohols such as decyl alcohol, vitamins (D, E) and derivatives thereof, and liquids containing washing ingredients such as soap base solutions.

  The content of the oily substance is preferably 0.01% by mass to 90% by mass with respect to the total amount of the gel composition. If the content is more than 90% by mass, the stability of the gel may be deteriorated, and the above range is preferable because it may not be economical. On the other hand, the lower limit of the content is preferably 0.01% by mass or more.

  Examples of semi-solid oily substances include lanolin and petrolatum.

  Two or more of the above oily substances can be used simultaneously.

At the process (1) in the manufacturing method of this embodiment, the said galactose partial decomposition product and an aqueous solvent are mixed at room temperature, and a mixture is obtained.
More specifically, the galactose partial decomposition product is mixed with an aqueous solvent at room temperature to obtain a dispersion (i.e., a suspension) as a mixture of galactose partial decomposition product dispersed in an aqueous medium.

  Here, as described above, as the aqueous medium is cooled to lower its temperature, the time required for the galactose partial decomposition product to be in the hydrated and swollen state, and further, the hydrated and swollen state is dissolved. It takes less time to In addition, in a state where the time to reach such a dissolved state is relatively fast, relatively strong stirring power is required to diffuse the galactose partial decomposition product as uniformly as possible in the aqueous solvent. That is, in order to dissolve the galactose partial decomposition product as uniformly as possible in the cooled aqueous solvent, relatively strong stirring power is required.

On the other hand, partial decomposition products of galactose have much longer time to reach a state of hydration and swelling in an aqueous solvent at room temperature, and also to a state of dissolution much more than when using a cooled aqueous solvent. Therefore, even if it stirs with the same stirring power, it hardly melt | dissolves.
Therefore, in the step (1), the generation of the damage due to the galactose partial decomposition product can be suppressed by mixing the galactose partial decomposition product with the aqueous solvent at room temperature.

  In addition, when mixing the galactose partial decomposition product and the aqueous solvent, even if it appears that powder clumps are generated in the dispersion, this can be easily loosened by lightly loosening with a spatula (spater) instead of damas. It can be almost completely dispersed. As used herein, "relaxing" means returning to the unit before forming a lump, and generally means an operation completely different from the stirring performed to dissolve the substance.

The temperature of the aqueous solvent at the time of mixing the aqueous solvent and the galactose partial decomposition product is not particularly limited as long as it is room temperature, but 18 to 30 ° C. is preferably employed, and 18 to 28 ° C. is employed. Is more preferred.
By mixing at 18 ° C. or higher, it is possible to disperse the galactose partial decomposition product in the aqueous solvent while further avoiding formation of lumps. Thereby, since it is possible to further suppress the increase in viscosity which occurs when the galactose partial decomposition product is dissolved, it is possible to further suppress the decrease in workability. In addition, by mixing at 30 ° C. or less, the galactose partial decomposition product can be dispersed in the aqueous solvent in a normal room temperature environment without requiring a special environment such as heating, so that the operation is simply performed. Can. In addition, you may mix while heating.
As described above, by mixing the galactose partial decomposition product and the aqueous solvent at 18 to 30 ° C., it is possible to further suppress the decrease in workability.

The mixing time for mixing the aqueous solvent and the galactose partial decomposition product is not particularly limited in view of the fact that the galactose partial decomposition product is extremely compatible with the aqueous solvent at the above-mentioned temperature, and is appropriately set. Can.
The mixing time may be, for example, 5 minutes to 1 hour, and preferably 10 minutes to 30 minutes.
By setting the mixing time to 1 hour or less, the operation can be completed quickly and there is an advantage that the workability is improved.

The compounding quantity of the galactose partial decomposition product with respect to the aqueous solvent is not particularly limited, and can be set appropriately.
For example, it can be appropriately set according to the desired gel properties of the gel composition to be obtained. For example, from this viewpoint, for example, in the step (1), the mixture preferably contains 1 to 10% by mass of the galactose partial decomposition product, and more preferably 2 to 7% by mass Preferably, 3 to 5% by mass is more preferable.
By containing 1% by mass or more of the galactose partial decomposition product in the above mixture, gelation can be achieved more reliably. In addition, the galactose partial decomposition product is preferably contained in an amount of 2% by mass or more, and more preferably 3% by mass or more, in that the aqueous layer can be hardly formed on the surface of the gel.
On the other hand, by containing 10% by mass or less of the galactose partial decomposition product, it is possible to make the amount of water in the gel an appropriate amount, thereby producing a gel composition capable of exhibiting desired gel characteristics. Can.
In addition, when the mixture obtained in step (1) contains 1 to 10% by mass of galactose partial decomposition product, it is stabilized stably without separating the oily substance into the hydrated swelling product of galactose partial decomposition product. It can be included.

Also, for example, a gel composition that can further exhibit desired gel properties by blending the components of the mixture in a shallow (small depth) container (that is, with the depth of the mixture reduced). Objects can be manufactured.
In addition, when the density | concentration of a galactose partial decomposition product is low, when the mixture cooled or frozen mentioned later is heated, the water which could not contribute to gelatinization may become a layer on the upper side, and the gelatinization layer may become the lower part. In this case, the lower gel layer can also be obtained as a gel composition by removing the upper aqueous layer (separation water). That is, the gel composition can be obtained by concentrating the cooled or frozen mixture described later.
Thus, in view of the fact that the aqueous layer is removed depending on the concentration of the galactose partial decomposition product, the generated gel composition (the gel composition after removal when the aqueous layer is removed, When the aqueous layer does not occur, the concentration of the galactose partial decomposition product in the gel composition as it is is preferably 1 to 10% by weight, more preferably 2 to 7% by weight, and still more preferably 3 to 5% by weight .

  According to the step (1), a gel composition as a molded product formed into a desired shape is obtained by transferring the above mixture to a mold or the like of a desired shape before cooling or freezing in the step (2). Is also possible.

In step (2), the mixture obtained in step (1) is cooled or frozen.
More specifically, the dispersion obtained in step (1) is cooled or frozen to obtain a hydrated swollen product obtained by hydrating and swelling the galactose partial decomposition product in a hydration solvent.
Hydrated swelling materials include liquid hydration swelling materials which are cooled but not frozen, and frozen solid hydration swelling materials. In the step (2), the aqueous solvent may contain a dissolved product in which the galactose partial decomposition product is partially dissolved.

According to the step (2), by cooling or freezing the mixture of the aqueous solvent and the galactose partial decomposition product, the galactose partial decomposition product in the state of being dispersed in the aqueous solvent in the step (1) It can be hydrated and swollen by water in it. This ability to be hydrated and swelled can relatively delay the development of viscosity, thereby allowing partial degradation of galactose in an aqueous medium without the need for relatively strong forced agitation as in the prior art. It can be dispersed. As described above, the forced stirring and the like can be eliminated, which is simplified accordingly.
In addition, performing forced stirring in step (2) is not hindered, and when forced stirring is performed, it is possible to hydrate and swell the galactose partial decomposition product more quickly than when not performed. Become.

If the galactose partial decomposition product in the mixture (dispersion liquid) obtained in the step (1) can be hydrated and swollen in the cooling or freezing, the degree to which the mixture is cooled is particularly limited Rather, they can be set as appropriate.
Here, as the temperature for lowering the temperature of the mixture is lower, the galactose partial decomposition product tends to be easily hydrated and swollen, but the hydration and swelling are advanced excessively and the viscosity tends to be easily developed.
Therefore, for example, it is preferable to cool or freeze the mixture obtained in the step (1) to -25 to 10 ° C in consideration of such a viewpoint.
By setting the upper limit of the temperature range for lowering the temperature of the mixture to 10 ° C. or less, the galactose partial decomposition product is easily hydrated and swelled. In addition, the upper limit is more preferably 5 ° C., and still more preferably 1 ° C. in view of easier hydration and swelling of the galactose partial decomposition product.
On the other hand, by setting the lower limit of the temperature range for lowering the temperature of the mixture to -25 ° C, it is possible to suppress the excessive progress of the hydration swelling and make it difficult to develop viscosity.

In step (3), the mixture obtained in step (2) is gelled by heating to obtain a gel composition containing galactose partial degradation products.
More specifically, in step (3), the hydrated swell and the lysate obtained in step (2) are gelled by heating to obtain a gel composition.

And, in the present embodiment, the oil-like substance is added in at least one of the steps (1) to (3) and before the mixture obtained in the step (2) is gelled.
The timing of the addition of the oily substance is particularly preferable if the oily substance is added in at least one of the steps (1) to (3) and before the mixture obtained in the step (2) is gelled. It is not limited.

  Specifically, for example, in the step (1), an oily substance is further added. After addition, the galactose partial hydrolyzate, the aqueous solvent and the oil can be mixed uniformly with stirring with a stir bar or spatula.

Thus, according to the addition of the oily substance, the mixture of the galactose partial decomposition product, the aqueous solvent, and the oily substance in step (1) is obtained to obtain a mixture, and the resulting mixture is referred to as step (2). By cooling or freezing, the galactose partial decomposition product in the mixture is hydrated and swelled in the aqueous solvent, thereby obtaining an oil-containing mixture in which the hydrated swelling product and the oily substance are mixed. And while incorporating the oily substance added in the step (1) between molecules of the galactose partial decomposition product by heating the hydrated swollen substance in the oily substance-containing mixture in the step (3) (while emulsifying) The oil-containing mixture can be gelled. At this time, the oily substance-containing mixture can be gelled without high-speed stirring and mixing. The oily substance may be gradually added little by little.
Thus, in step (1), the oil can be mixed at room temperature by adding the oil. In addition, since necessary raw materials can be charged at relatively early steps, the production becomes easier.

Thus, when adding an oily substance in step (1), it is preferable to add 0.01 to 20 parts by mass of the oily substance to 1 part by mass of galactose partial decomposition product, and 0.1 to 10 parts by mass. It is more preferable that it is a part.
The addition of 0.01 to 20 parts by mass of the oil enables stable inclusion of the oil in the mixture of galactose partial decomposition products without further separation, and additionally, the oil is more stably retained. It is possible to

  In addition to the above, specifically, for example, in step (3), the oily substance is added before the mixture obtained in step (2) is gelled. The mixture obtained in step (2) and the oily substance may be mixed uniformly by stirring with a stir bar or spatula.

By thus adding the oily substance, the galactose partial decomposition product is hydrated and swollen in the aqueous solvent in the step (2) before the oily substance is added, whereby the hydrated swelling as a mixture thereof is caused. Get things. Then, in step (3), an oil-containing mixture can be obtained by adding the oil before gelation of the hydrated swelling product, and the galactose moiety can be obtained by heating the oil-containing mixture. The oil-containing mixture can be gelled while incorporating (emulsifying) the oil between the molecules of the degradation product.
As a result, an oil-like substance can be added in a state in which the hydrated swelling material is already sufficiently formed and the molecules of the galactose partial degradation product constituting the hydrated swelling material are relatively large. A relatively large amount of oily substances can be incorporated between the molecules of the degradation product.
Thus, an oil-containing gel composition can be produced which contains the oil more sufficiently.

In the step (2), when the mixture obtained in the step (1) is frozen, in the step (3), the mixture obtained in the step (2) is thawed, and the oily substance is Is preferably added. The oily substance may be added while thawing in the step (2), or the oily substance may be added after thawing.
By adding the oily substance in this way, the mixture and the oily substance can be mixed while the mixture frozen in step (2) is thawed, so that they can be mixed sufficiently. Thus, the oily substance can be contained more sufficiently.
In this case, the mixture frozen in step (2) may be thawed in step (3), and the mixture may be thawed by heating to a temperature at which gelation does not occur. In addition, when the oily substance is added to the mixture obtained in the step (2), the mixture may or may not be thawed, but when the mixture and the oily substance are mixed Preferably, the mixture is thawed.

  When adding the oily substance in the step (3), it is preferable to add 0.01 to 700 parts by mass of the oily substance to 100 parts by mass of the mixture obtained in the step (2), and 10 parts by mass to 450 parts. The parts by mass are more preferred.

  By adding 0.01 to 700 parts by mass of the oily substance, it is stably included in the hydrated swelling product of the galactose partial decomposition product without further separating the oily substance in a wide range from relatively small amount to relatively large amount. In addition, it is also possible to keep the oil more stable in the gel composition.

  Further, 1 to 50 parts by mass of the oil-like substance may be added to 100 parts by mass of the mixture obtained in the step (2).

  According to this configuration, it is possible to stably include the oily substance in the hydrated swelling product of the galactose partial decomposition product without further separating it, and additionally, the oily substance can be more stably retained in the gel composition. It becomes possible.

  Moreover, 50 to 700 parts by mass of the oily substance may be added to 100 parts by mass of the mixture obtained in the step (2).

  By adding 50 to 700 parts by mass of the oily substance, it is possible to prepare a gel composition which contains the oily substance in a relatively large amount.

  Moreover, it is preferable to add 50-300 mass parts of said oily substances with respect to 100 mass parts of mixtures obtained at the said process (2).

  According to this configuration, it is possible to stably include the oily substance in the hydrated swelling product of the galactose partial decomposition product without separating it, and in addition, the oily substance can be more stably retained in the gel composition. It becomes possible.

  In the heating of the step (3), a temperature sufficient to gelate the mixture containing the cooled or frozen oil obtained in the step (2) (oil-containing mixture), or In 3), the oil-containing mixture is heated to a temperature sufficient to gelate the mixture (oil-containing mixture) obtained by adding the oil to the mixture obtained in the step (2). You should do it. That is, the extent to which the temperature of the oil substance-containing mixture is raised is not particularly limited, and can be appropriately set.

Here, as the temperature for raising the temperature of the oily substance-containing mixture increases, the gel strength can be increased, but the useless heating operation tends to increase and the workability tends to decrease. Furthermore, the oily substance tends to be easily separated from the gel structure.
Therefore, for example, in the case of heating the oily substance-containing mixture in consideration of such a viewpoint, it is preferable to raise the temperature to 25 to 60 ° C.
By setting the lower limit of the temperature to be raised to 25 ° C., the gel strength can be sufficiently increased. The lower limit is more preferably 30 ° C., and still more preferably 40 ° C. from the viewpoint of sufficiently enhancing the gel strength.
On the other hand, by setting the upper limit of the temperature to be raised to 60 ° C., wasteful heating operation and separation of oily substances can be suppressed, thereby suppressing deterioration of the quality and workability of the gel composition. be able to. In addition, the upper limit is preferably 50 ° C. in order to further suppress unnecessary heating operation and separation of the oily substance.

  As described above, after adding the oily substance, the oily substance-containing gel composition can be obtained by heating in step (3) to gelate the oily substance-containing mixture.

According to the method for producing a gel oil substance-containing composition of the present embodiment as described above, in the step (1), the galactose partial galactose xyloglucan degradation product and the aqueous solvent are mixed at room temperature into the mixture. The galactose partial decomposition product can be dispersed in an aqueous solvent without generating lumps.
In the step (2), the galactose partial decomposition product can be hydrated and swollen in an aqueous solvent by cooling or freezing the mixture obtained in the step (1). At this time, it becomes easy to make the galactose partial decomposition product not in a dissolved state but in a hydrated and swollen state. Thereby, the viscosity of the mixture can be lowered, and by cooling or freezing, the mixture can be made into a highly viscous hydrated swelling material.
Furthermore, since the viscosity development can be relatively delayed, the galactose partial degradation product can be sufficiently dispersed in the aqueous medium without performing the conventional relatively strong forced agitation.
Moreover, according to the steps (1) and (2), the aqueous solvent does not have to be cooled in advance, so that the preparation time and labor can be saved accordingly.

And, in at least one of the steps (1) to (3), and before the mixture obtained in the step (2) is gelled, it is not gelled by adding an oily substance, And, a mixture containing an oily substance (an oily substance-containing mixture) is obtained, and by heating it, while incorporating an oily substance between molecules of the galactose partial decomposition product in the above-mentioned hydrated swelling product (while emulsifying) It can be gelled, whereby an oil-containing gel composition can be obtained.
In addition, in the oil-containing material-containing gel composition thus obtained, the added oil-like material is stably incorporated therein without being separated from the gel composition, and the oil-containing material is sufficiently contained. .

  Therefore, according to the above-mentioned production method, an oily substance-containing gel composition which sufficiently contains an oily substance can be conveniently produced.

  In addition, for example, when adding an oily substance in the step (1), the oily substance-containing mixture obtained in the step (1) is cooled or frozen in the step (2), and then the step (if necessary) It may be stored still at a low temperature of, for example, 15 ° C. or less until it is used in 3). And the oily substance containing mixture preserve | saved in this way can be heated and gelled at a process (3), and an oily substance containing gel composition can also be obtained.

  Also, for example, when no oil substance is added in step (1), the mixture after cooling or freezing in step (2) (hydrated and swollen material) is used until necessary in step (3) For example, it may be stored at a low temperature of 15 ° C. or less. Then, an oil-like substance is added to the mixture thus stored in step (3) to form an oil-like substance-containing mixture, which can be heated to gelate to obtain an oil-like substance-containing gel composition.

  Furthermore, for example, in the step (3), the oily substance-containing mixture may be stored by being allowed to stand at a low temperature of, for example, 15 ° C. or less until heating for gelation is performed, if necessary. Then, the oil substance-containing composition can be transferred to a mold having a desired shape and heated in this state to cause gelation to obtain an oil substance-containing gel composition as a molded article.

  In addition, as described above, the galactose partial decomposition product used in the manufacturing method of the present embodiment has a reversible thermal gelation property, and more specifically, is gelated by heating to about body temperature. Have the following characteristics. Thus, in the production method of the present embodiment, for example, in the step (3), the oily substance-containing mixture may be applied to the skin and heated by body temperature to cause gelation. That is, the oily substance-containing gel composition may be prepared at the time of use.

The oily substance-containing gel composition of the present embodiment is obtained by the production method of the present embodiment.
The oil substance-containing gel composition contains galactose xyloglucan galactose partial decomposition product, an aqueous solvent, and an oil substance, and contains 0.01 to 90% by mass of the oil substance.

  According to the present embodiment, the oily substance-containing gel composition is one which contains the oily substance sufficiently and which is easily produced.

The oil-containing material-containing gel composition of the present embodiment preferably contains 0.05 to 20% by mass of galactose partial decomposition product.
By containing 0.05 to 20% by mass of the galactose partial decomposition product, the oily substance can be stably included in the hydrated swelling product of the galactose partial decomposition product.

The oil-containing material-containing gel composition of the present embodiment more preferably contains 0.2 to 5% by mass of the galactose partial decomposition product.
By containing 0.2 to 5% by mass of the galactose partial decomposition product, there is an advantage that the hydrated swelling product of the galactose partial decomposition product can be stably included without further separating the oily substance.

  In addition, since the oily substance-containing gel composition obtained by the production method of the present embodiment is produced by gelation by heating as described above, household, medical sites, living bodies are produced based on this property. It can be used in various fields as a polymer material that can be used in various industries, such as materials and cosmetics. In addition, since the galactose partial degradation product used in the present embodiment is not obtained by chemically modifying natural product-derived galactoxyloglucan, a surfactant can be used when it is mixed with a biologically safe oily substance. Since it is not necessary to use it, the obtained oily substance gel composition can also be used safely for the living body, and can also be used for food.

  As mentioned above, although the manufacturing method of the oily substance containing gel composition of this embodiment and the oily substance containing gel composition were explained, the present invention is not limited in particular to the above-mentioned embodiment, but within the intended scope of the present invention The design can be changed as appropriate. For example, in the method for producing the gel composition and the gel composition, additives other than the galactose partial decomposition product, the oily substance, and the aqueous solvent may be appropriately added.

  Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

(Production Example 1) Production of galactose partial degradation product of galactoxyloglucan Purification of β-galactosidase:
0 for ion-exchange chromatography (Product name: DEAE Toyopeal, Tosoh Corporation) of a 2.5% aqueous solution of a commercially available β-galactosidase (product name: Lactase Y-AO, from Yakult, from Aspergillus oryzae) having complex enzyme activity .025 M phosphate buffer (pH 7.4), applied a NaCl gradient of 0 to 0.6 M, and eluted at a NaCl concentration of 0.2 to 0.4 M; Furthermore, it was subjected to hydrophobic chromatography (product name: Butyl-Toyopeal, Tosoh Co., Ltd.) 0.025 M phosphate buffer (pH 7.4), gradient of 0 to 0.6 M ammonium sulfate, and elution was performed at an ammonium sulfate concentration of 10% or less I did. By the above operation, 60 mg of purified enzyme was obtained from 2.5 g of a commercially available crude enzyme. This product did not show cellulase activity or IPase (isoprimevelose producing enzyme) activity.

-Production of galactose partial decomposition product:
Using the purified enzyme β-galactosidase obtained above, an aqueous solution of 1% galactoxyloglucan (product name: Glyroid (registered trademark), DSP Gokyo Food & Chemical Co., Ltd.) as a substrate, the enzyme concentration 2.4 × 10 ^-5 The reaction was terminated by heating at 100 ° C. for 20 minutes after reaction at 50% by mass, pH 5.6. The reaction solution was gelled about 15 hours after the start of the reaction to obtain a gel-like composition. The galactose removal rate in the obtained gel composition was calculated by the following method.
1 ml of a cellulase Onozuka RS (Yakult Co., Ltd.) 0.15 mass% solution (50 mM acetate buffer, pH 4.0) was added to 7 g of a 1 mass% aqueous solution of the gel composition, and reacted at 50 ° C. overnight. . The above 1% galactoxyloglucan aqueous solution was also reacted in the same manner as a control. After the reaction, the enzyme was inactivated by heating the reaction solution at 98 ° C. for 30 minutes. Then, the sample was applied to a pretreatment cartridge (IC-SP, manufactured by Tosoh Corporation) and a 0.45 μm cellulose acetate membrane filter, and 10 μL of the obtained filtrate was treated with acetonitrile: water = 60: 40 (v / v) at 0. Apply to the amino column of HPLC flowing at 6 mL / min, and elute the elution area of oligosaccharide (7 saccharides (0 galactose), 8 saccharides (1 galactose), 9 saccharides (2 galactose)) of galactoxyloglucan. It was detected by a differential refractometer. Subsequently, the amount of galactose per 1 unit (7 sugars) was calculated by (area of 8 sugars + (area of 9 sugars × 2)) / (area of 7 sugars + area of 8 sugars + area of 9 sugars). The rate of reduction of the amount of galactose calculated for the gel composition calculated by the above equation from the amount of galactose calculated from the control galactoxyloglucan was further calculated as the galactose removal rate (%), and it was about 45%. The
Then, the gel-like composition obtained above was freeze-dried, or alcohol was added to the gel-like composition, and after precipitation and filtration, it was dried to obtain a powdery galactose partial decomposition product.

  In Experimental Examples 1 to 4 below, the dispersion prepared by dispersing the galactose partial decomposition product in water at room temperature is cooled or frozen, and then the mixture is prepared by heating and mixing the oily substance as an example. What was manufactured by heating without mixing the substance was taken as a comparative example.

(Experimental example 1)
(1) Preparation of olive oil-containing gel composition 1.0 g of partially decomposed galactose product obtained in Production Example 1 in a plastic cup (product name: Promax, volume: 90 mL, product number: EI-90, manufactured by Asahi Kasei Pax Corporation) And water at room temperature to a total amount of 20 g to prepare a dispersion of galactose partial decomposition product (5% by mass). In this state, the dispersion is allowed to stand for 2 hours in a freezer (model: HRF-180XF, manufactured by Hoshizaki Electric Co., Ltd.) set to -20 ° C, and the temperature of the dispersion is lowered to -20 ° C. Then it was thawed at room temperature. Samples after thawing, 0.2, 0.4, 0.8, 1.2, 2.0, 3.0, 4.0.5.0, 10.0 g of olive oil (Product name: Subuvetica Organic extra virgin olive oil, DSP Gokyo Food & Chemical Co., Ltd. (The same olive oil was used as olive oil hereinafter) was added, mixed using a spatula, and heated to 50 ° C. in a thermostat. After being allowed to stand, this state was maintained for 2 hours to prepare an olive oil-containing gel composition.
(2) Evaluation With respect to the obtained gel composition, separation of olive oil, shape retention (gel formation), feel and feeling in use were evaluated. The separation of olive oil was evaluated based on the criteria shown in Table 1 below. With regard to shape retention, the plastic container is tilted 90 ° from the horizontal state after holding (heating) at 50 ° C. for 2 hours, and when there is no deformation of the gel composition, it has shape retention (gel formation It was judged. With regard to touch, the composition after heating was taken out of the container, and the touch was evaluated by sticking the taken out gel composition on the skin of the back of the hand.
The results for the addition amount of olive oil and the separation are shown in Table 2.

  As shown in Table 2, a good gel composition containing up to at least 4 g of olive oil could be made from 20 g of dispersion containing 5% by weight of the partial decomposition product. Further, in the obtained gel composition, no deformation of the composition was observed even when the plastic cup was inclined by 90 °. From this, it was shown that the composition was gelled and had shape retention. Furthermore, the gel composition could be easily removed from the container. When the gel composition taken out was placed on the skin of the back of the hand, an appropriate amount of oil adhered to the skin to make the skin moist, and also showed a pleasant touch feeling, and the feeling of use was excellent.

(Experimental example 2)
(1) Preparation of Olive Oil-Containing Gel Composition (Method for Preparation by Adding Olive Oil to the Dispersion of Step (1))
After preparing a dispersion of galactose partial decomposition product (5% by mass) to a total amount of 20 g in the same manner as in Experimental Example 1, 4.0 g of olive oil was added and not mixed. In this state, the dispersion to which olive oil was added was allowed to stand in a freezer set at -20 ° C for 2 hours, the dispersion was cooled to -20 ° C, held in this state for 2 hours, and then thawed at room temperature. The sample after thawing was mixed using a spatula, heated in a thermostat to 50 ° C., and held in this state for 2 hours to prepare an olive oil-containing gel composition.
(2) Evaluation The obtained gel composition was evaluated for olive oil separation, shape retention (gel formation), and feel in the same manner as in Experimental Example 1. Table 3 shows the addition amount of olive oil and the result of separation.

  As shown in Table 3, even a sample prepared by adding 4 g of olive oil to a dispersion containing 5% by mass of the partial decomposition product. A good gel composition was obtained. Further, in the obtained gel composition, no deformation of the composition was observed even when the plastic cup was inclined by 90 °. From this, it was shown that the composition was gelled and had shape retention. Furthermore, the gel composition could be easily removed from the container. In addition, the gel composition taken out had a suitable amount of oil adhering to the skin when placed on the skin of the back of the hand, which made the skin moist and showed a pleasant touch feeling, and was excellent in the feeling of use.

(Experimental example 3)
(1) Preparation of Silicone Oil-Containing Gel Composition In the same manner as in Experimental Example 1, 20 g (5 mass%) of a dispersion of 1.0 g of galactose partial degradation product was prepared, frozen and then thawed. After thawing, add 1.0, 2.0, 3.0, 4.0 g of silicone oil (product name: Carecil, model: CSF-3100, manufactured by Nussil Technology) and mix using a spatula, After raising the temperature to 50 ° C. in a thermostat, this state is maintained for 2 hours to prepare a silicone oil-containing gel composition.
(2) Evaluation The obtained gel composition was evaluated for olive oil separation, shape retention (gel formation), and feel in the same manner as in Experimental Example 1. The amount of olive oil added and the results for separation are shown in Table 4. Moreover, the result of the comparative example 1 is also shown collectively.

  As shown in Table 4, from 20 g of the dispersion containing 5% by mass of the partial decomposition product, a good gel composition containing up to 4 g of silicone oil could be produced. Further, in the obtained gel composition, no deformation of the composition was observed even when the plastic cup was inclined by 90 °. From this, it was shown that the composition was gelled and had shape retention. Furthermore, the gel composition could be easily removed from the container. The gel composition taken out had a suitable amount of oil adhering to the skin when placed on the skin of the back of the hand, which made the skin moist and showed a pleasant touch, and was excellent in the feeling of use.

(Experimental example 4)
(1) Preparation of Sesame Oil-Containing Gel Composition In the same manner as in Experimental Example 1, 20 g (5 mass%) of a dispersion of 1.0 g of galactose partial degradation product was prepared, frozen and then thawed. After thawing, add 0.2, 0.5, 1.0, 2.0.3.0 g sesame oil (Kadoya Co., Ltd.), mix using a spatula, and heat to 50 ° C in a thermostat. The mixture was kept in this state for 2 hours to prepare a sesame oil-containing gel composition.
(2) Evaluation The obtained gel composition was evaluated for sesame oil separation, shape retention (gel formation), and touch feeling in the same manner as in Experimental Example 1. The results for olive oil loading and separation are shown in Table 5.

  As shown in Table 5, a good gel composition containing up to 1.0 g of sesame oil could be made from 20 g of the dispersion containing 5% by mass of the partial decomposition product. In the gel composition obtained, no deformation of the composition was observed even when the plastic cup was inclined by 90 °. From this, it was shown that the composition was gelled and had shape retention. Furthermore, the gel composition could be easily removed from the container. The gel composition taken out had a suitable amount of oil adhering to the skin when placed on the skin of the back of the hand, which made the skin moist and showed a pleasant touch, and was excellent in the feeling of use.

(Experimental example 5)
(1) Preparation of Oleic Acid-Containing Gel Composition In the same manner as in Experimental Example 1, 30.0 g of a dispersion containing 3% by mass and 5% by mass of galactose partial decomposition product was prepared, frozen and then thawed. After thawing, while mixing using a stir bar, oleic acid (manufactured by Nacalai Tesque, Inc.) was added little by little, and the addition amount of oleic acid which can be stably contained in the gel composition was examined. The mixture to which oleic acid was added was heated to 50 ° C., and held in this state for 2 hours to prepare an oleic acid-containing gel composition.
(2) Evaluation The obtained gel composition was evaluated for oleic acid separation, shape retention (gel formation), and touch feeling in the same manner as in Experimental Example 1. Table 6 shows the addition amount of olive oil and the results of separation.

As shown in Table 6, in 30 g of the dispersion containing 5% by mass of the partial decomposition product, a good oleic acid-containing gel composition containing 3.3 g of oleic acid could be prepared.
On the other hand, 30 g of dispersion containing 3% by mass of partial decomposition product is at least about 2.5 times as much oleic acid (8.2 g) as compared to 30 g of dispersion containing 5% by mass of partial decomposition product Was able to make a good oleic acid-containing gel composition which contained stably without separation. Further, in both of the obtained gel compositions containing oleic acid, no deformation of the composition was observed when the plastic cup was inclined by 90 °. From this, it was shown that the composition was gelled and had shape retention. Furthermore, the gel composition could be easily removed from the container. The gel composition taken out had a suitable amount of oil adhering to the skin when placed on the skin of the back of the hand, which made the skin moist and showed a pleasant touch, and was excellent in the feeling of use.

(Experimental example 6)
(1) Preparation of Soap-Containing Gel Composition The formulation of this experimental example is shown in Table 7 below.
To the above plastic cup, 1.0 g of the partially decomposed galactose obtained in Production Example 1 was added, and water at room temperature was added to make the total amount 15 g, thereby obtaining a dispersion liquid (5 mass%) of the partially decomposed galactose. In the resulting dispersion, soap base solution 1 (product name: Priory B-100B (registered trademark), manufactured by Kao Corporation), soap base solution 2 (product name: Amilite GCK-12K (registered trademark), manufactured by Ajinomoto Co., Ltd.) Were separately added and mixed using a spatula (Addition before freezing of soap base solution 1: Example 18, before freezing addition of soap base solution 2: Example 20). Each of the dispersions (2) to which the soap base solutions 1 and 2 were added and the dispersion (2) to which the soap base solution was not added was a freezer (type: HRF-180XF, Hoshizaki) set to -20 ° C. The product was allowed to stand for 2 hours in Denki Co., Ltd., cooled to -20 ° C., held in this state for 2 hours, and then thawed at room temperature. After thawing, 5 g of soap base solution 1 and soap base solution 2 were separately added to the dispersion without added soap base solution, and mixed using a spatula (addition after freezing and thawing of soap base solution 1: implementation Example 19, post freeze-thaw addition of soap base solution 2: Example 21). Each dispersion was heated to 50 ° C. in a thermostat, and then held in this state for 2 hours to prepare a soap base solution-containing gel composition.

(2) Evaluation In each of Examples 18 to 21, a gel composition containing a soap base solution was obtained.
The case where the soap base solution was uniformly mixed is represented as "◎", and the case where the soap base solution was not uniformly mixed was evaluated as represented as "○". The results are presented in Table 7.
As shown in Table 7, when the soap base solution was mixed with the dispersion before freezing (Examples 18 and 20), a good gel composition uniformly containing the soap base solution was obtained. However, when the soap base solution was mixed with the freeze-thawed mixture (Examples 19 and 21), separation of the soap base solution was hardly observed, but was not uniformly mixed. When the hands are washed with tap water using the gel composition (Examples 18 and 20) to which the soap base solution is added before freezing, the gel composition exhibits good latherability and the hands are washed without any problem I was able to.

(Experimental example 7)
(1) Preparation of olive oil and soap base solution containing gel composition The formulation of this experimental example is shown in Table 8.
As shown in Table 8 below, 1.0 g of a galactose partial decomposition product obtained in Production Example 1 was used in a plastic cup (manufactured by Asahi Kasei Pax Co., product name: Promax, volume: 90 mL, EI-90), and a soap base solution (Product name: Priory B-100 (registered trademark), manufactured by Kao Corporation) 0 or 6 g was added, water at room temperature was added, and the total amount was 20 g to obtain a dispersion containing 5% by mass of galactose partial degradation product. The prepared dispersion is allowed to stand for 2 hours in a freezer (model: HRF-180XF, manufactured by Hoshizaki Electric Co., Ltd.) set at -20 ° C to lower the temperature of the dispersion to -20 ° C, and held in this state for 2 hours, It thawed at room temperature. After thawing, 4 g of water (0 g of olive oil + 4 g of water), 2 g of olive oil and 2 g of water (2 g of olive oil + 2 g of water), 3 g of olive oil and 1 g of water (3 g of olive oil + 1 g of water) 4 g (4 g olive oil + 0 g water) were added and mixed using a spatula. The temperature of the obtained mixture was raised to 50 ° C. in a thermostat, and then held in this state for 2 hours to prepare an olive oil and a soap base solution containing gel composition (olive oil blended gel soap composition) .
(2) Evaluation The separation of a gel composition containing olive oil alone and a gel composition containing olive oil and a soap base solution was evaluated in the same manner as in Experimental Example 1. The results are shown in Table 8.

As shown in Table 8, by mixing the soap base solution with 20 g of the dispersion containing 5% by mass of the partial decomposition product before freezing, 17% by mass with respect to the total amount (100% by mass) of the gel composition It was possible to obtain a good composition containing olive oil of (Example 27). Further, in the obtained gel composition, no deformation of the composition was observed even when the plastic cup was inclined by 90 °. From this, it was shown that the composition was gelled and had shape retention. Furthermore, the gel composition could be easily removed from the container. The gel composition taken out had a suitable amount of oil adhering to the skin when placed on the skin of the back of the hand, which made the skin moist and showed a pleasant touch, and was excellent in the feeling of use.
When the hands were washed with the gel compositions of Examples 22 to 27, it was confirmed that foaming was good. When the surface of the hand was observed after washing, the surface of the hand was moist due to the olive oil remaining as a thin film on the surface of the hand. The gel composition containing no olive oil (Example 28) was foamed by freezing and thawing water addition and stirring, and the subsequent heat treatment caused gelation while containing fine foam. It was possible to make a foamed gel composition.

(Experimental example 8)
Cleansing Experiment Using Gel Composition In the same manner as Example 1, a dispersion containing 3% by mass of a partially degraded product was prepared, frozen and then thawed to prepare a mixture (Sample 1: gelation It has not been).
Furthermore, 20 parts by mass of olive oil was gradually added to 100 parts by mass of the above mixture, and mixed using a spatula to prepare an olive oil-containing mixture (Sample 2: not gelled).
On the other hand, 3 mass% of galactoxyloglucan is added by stirring and dissolving galactoxyloglucan (product name: Glyroid (registered trademark), DSP Gokyo Food & Chemical Co., Ltd.) in which galactose is not partially removed by adding to water and stirring. The contained aqueous solution was prepared (Sample 3: not gelled).

Next, a red lip cream (trade name: Lip Dress R, manufactured by Omi Brothers) was applied in a circle (five places of 2 cm × 2 cm) on a human arm.
Then, an appropriate amount of samples 1, 2 and 3 were applied to each of the five coated surfaces, and scrubbed with fingers (10 reciprocations for each coated surface). After scrubbing, the remaining gel was gently removed only by exposing it to running water. When the coated surface after removal was observed, the coated surface washed with the sample 3 had almost no lip cream removed, but the coated surface washed with the sample 2 had all the lip cream removed. The applied surface washed with the sample 1 had most of the lip cream removed. Therefore, in the gel composition containing the galactose partial decomposition product and the oily substance, the superior cleaning effect could be clearly confirmed as compared with the glyloid.

  Further, after the cleaning, the coated surface was dried, and the tissue was lightly pressed on the entire coated surface. As a result, red color was attached to the tissue in contact with the coated surface (part of the arm corresponding to the coated surface) cleaned by the sample 3. On the other hand, the tissue in contact with the coated surface (part of the arm corresponding to the coated surface) washed with sample 1 showed some red adhesion, but the tissue contacted with the coated surface washed with sample 2 There was no red adhesion at all.

  Furthermore, when the samples 1 and 2 were washed by heating them at 50 ° C. for 2 hours using the gel composition gelated as described above, the same results as the samples 1 and 2 were confirmed.

(Experimental example 9)
The prescription of Experimental example 9 is shown to Tables 9-17. In Tables 8 to 10, galactose partial degradation product is represented as "part", galactoxyloglucan (glyloid) is represented as "gu", methylcellulose is represented as "me", and galactose part prepared by stirring and dissolving at ice temperature. The decomposition product is referred to as "part / stirring".

  As the oily substance, olive oil, silicone oil, liquid paraffin (manufactured by Nacalai Tesque), cetyl 2-ethylhexanoate (product name: Cethiol SN-1, manufactured by BASF), oleyl alcohol (manufactured by Nacalai Tesque), trio Rain (manufactured by Nacalai Tesque), lanolin (manufactured by Sigma), and canola oil (manufactured by Nisshin Oillio) were used. An aqueous solution obtained by adding 0.05% by mass of a preservative (Proculin 200, manufactured by Sigma) to water to be used was used, and a glass screw cup (volume: 30 mL, No. 35, manufactured by Marem) was used as a container .

(1) Examples 29 to 58: Preparation of gel compositions containing various oily substances In the same manner as Example 1, an aqueous dispersion containing a galactose partial decomposition product is prepared, frozen and then thawed. A mixture (hydrated swell) was made. A fixed amount of each oil-like substance was added to the obtained mixture, and after mixing using a spatula basically except using a stirring bar as necessary, in a thermostat controlled at 25 ° C. to 80 ° C. It stood still for a fixed time. In addition, as described later, in the thermostat controlled at 4 ° C., those left to stand for a certain time did not gel (Comparative Examples 9, 10, 13). At any temperature, gelation was confirmed in about 5 to 10 minutes.

(2) Comparative Examples 2 to 8, 11 and 12: Preparation of Gel Composition Containing Various Oily Substances The above galactoxyloglucan (product name: Glyroid (registered trademark), DSP Gokyo Food & Chemical Co., Ltd.) is used as water. In addition, by stirring and dissolving, an aqueous solution containing 3% by mass of galactoxyloglucan was prepared. A fixed amount of various oily substances was added to the obtained aqueous solution, and after mixing using a spatula basically except using a stirring bar as necessary, it was adjusted to 4 ° C. and 25 ° C. to 80 ° C. In the thermostat, it stood still for a fixed time. In addition, although these were left to stand for a fixed time in a thermostat, they did not gel at any temperature.

(3) Comparative Examples 9, 10, 13 Preparation of Gel Composition Containing Various Oil Substances In the same manner as Example 1, an aqueous dispersion containing galactose partial decomposition product is prepared, frozen and then thawed. Thus, a mixture (hydrated swelling product) was produced. A fixed amount of each oil-like substance was added to the obtained mixture, and after mixing using a spatula basically except using a stirring bar as necessary, the mixture was allowed to stand still for a predetermined time in a thermostat controlled at 4 ° C. Placed. The resulting composition did not gel.

(4) Comparative Examples 14 to 15: Preparation of gel compositions containing various oily substances The above galactose partial decomposition product is added to water cooled to ice temperature and dissolved by stirring to dissolve 3 mass% of galactose partial decomposition product The contained aqueous solution was prepared. A fixed amount of oil (olive oil) was added to the obtained aqueous solution, and after mixing using a spatula basically except using a stirring bar as necessary, constant in a thermostat controlled at 50 ° C. Let stand for a while.

(5) Comparative Examples 16 to 21: Preparation of gel compositions containing various oily substances Powder of methylcellulose (product name: Metrols (registered trademark) SM-4000 (high viscosity type), manufactured by Shin-Etsu Chemical Co., Ltd.) at room temperature It was tried to prepare a dispersion by adding it to water, but it was not possible to prepare a dispersion because a lot of lumps were generated. Therefore, the above methylcellulose was added to water heated to 90 ° C. or higher and mixed to prepare a dispersion. The resulting dispersion was cooled to 4 ° C., and was further stirred and dissolved to prepare a 3% by mass aqueous solution. When the obtained aqueous solution was visually observed, it showed viscosity similar to the mixture using the galactose partial decomposition product. Then, a fixed amount of an oily substance (olive oil) is added to the obtained aqueous solution, and the mixture is basically mixed using a spatula except using a stirring bar as necessary, and then the temperature is adjusted to 50 ° C. in a thermostatic chamber. , Let stand for a fixed time.

(6) Reference Examples 1 to 25: Preparation of Compositions Containing Various Oily Substances In the above (1) to (4), compositions immediately after preparation obtained by adding and stirring oil substances (in a thermostat) The composition which was not allowed to stand in (1) was used as it was (as it was not gelled) as the composition of Reference Example.

(7) Evaluation In the same manner as in Experimental Example 1, the obtained oily substance-containing composition was separated immediately after preparation and after storage under constant conditions in a thermostat, shape retaining property (gel formation), and touch feeling Was evaluated. The results for the separation of oil are shown in Tables 9-17.

(8) Stability The obtained composition was examined for the relationship between the storage time in a thermostat and the separation. Specifically, the evaluation was carried out in the same manner as in Experimental Example 1 after storage under constant conditions, and the temporal stability was evaluated by comparison with the evaluation of the composition immediately after preparation in (6) above. And the composition evaluated as favorable even after preserve | saving on fixed conditions was determined to be a thing stable over time. In addition, in the column of storage conditions of Tables 9-17, "-" is a composition immediately after preparation, and shows that it did not preserve | save with a thermostat.

  As shown to Tables 9-17, the composition which contains a galactose partial decomposition product saw gelation by heating 25 degreeC or more. In addition, the composition containing methylcellulose was found to gel when heated at 50 ° C. or higher. In contrast, compositions containing galactoxyloglucan did not gel.

A gel composition containing an oily substance (eg, olive oil (Example 32)) and a galactose partial decomposition product is stable even at 80 ° C. storage, heat resistant (the gel is not broken or dissolved) and high temperature It was shown to have environmental stability (no separation of oil under high temperature environment).
On the other hand, the composition containing such oily substance and galactose partial decomposition product exhibited a sol upon long-term storage at low temperature (4 ° C.). In addition, due to the low temperature storage, separation of the oily substance was observed (the amount of the hydrated swollen product taking in the oily substance was reduced), and the stability tended to be low.
Since a mixture of galactose partial decomposition product and an aqueous medium (hydrated swelling product) does not gel at low temperature, in order to make a gel composition containing an oil, the oil is further separated with time. In order to make a gel composition containing it stably, it is not sufficient just to mix an oil substance into the above mixture, and it is necessary to gel the above mixture once by raising the temperature. It was revealed that the gel composition thus obtained by gelation can stably contain the oily substance without separating over time.
In addition, it was found that gel compositions containing various oily substances and galactose partial decomposition products can be easily removed from the container, and all have a pleasant touch.

As shown in the above table, the oily substance-containing gel composition (for example, Examples 40 to 43) prepared by the method of the present invention is a solution dissolved with stirring under ice temperature (conventional method, see Patent Document 1) It became clearer than the gel composition (comparative examples 14 and 15) produced using B.) that an oil-like substance can be contained stably without separating at the time of manufacture (example, reference example 15).
In addition, the composition prepared by adding the oily substance to the solution prepared by the conventional method, when stored at 50 ° C. for a certain period of time, the separation of the oily substance increases after 2 hours (Comparative Example 14), 24 hours after In the above, the separation of the oily substance was remarkable, and the stability could not be maintained at all (Comparative Example 15).
On the contrary, the oil-containing gel composition obtained by the method of the present invention unexpectedly has more oil than the solution prepared by the conventional method at the stage of the above mixture (hydrated swelling product). The composition can be stably contained without separating it (eg, Reference Example 14), and further, when stored at 50 ° C. for a certain period of time by heating the composition to gelate, It was possible to maintain stability without separation over time for at least one month (Example 43).
In addition, the oily substance-containing gel composition produced by the method of the present invention is easy to manufacture.
From this result, the above mixture (hydrated swelling product) and gel composition obtained by the method of the present invention should stably contain an oily substance without separating it from the solution and gel composition prepared by the conventional method. In addition, it is considered that the structure can be stably contained without being separated with time.

  As shown in the above table, when galactoxyloglucan (glyloid) is used, it is before storage (Reference Examples 2, 4, 5, 8, 10, 12, 13) and after storage under various conditions (comparison) In Examples 2-8, 11, 12), the compositions containing various oils were clearly separated and less stable than when using the galactose partial degradation product. These results indicate that galactose partial decomposition products can contain a large amount of oily substances at the time of production as compared with glyroids, and further that temporal stability (reduction of the content of oily substances is suppressed) is also high. Is shown. From this, it was suggested that the change in physical properties expressed by the partial decomposition of the side chain galactose of galactoxyloglucan is involved in the content of the oily substance in the gel composition and the temporal stability.

As shown in the above table, the hydrated swelling product (mixture) using the galactose partial decomposition product is, by mass ratio, equivalent to several times the amount of olive oil (Reference Examples 11 and 14), silicone oil (Reference Example) 3) It was shown that liquid paraffin (Reference Examples 6 and 7), cethiol (Reference Example 9), lanolin (Reference Example 18), and canola oil (Reference Example 19) can be stably contained. In particular, with regard to olive oil, it was shown that the above mixture can stably contain about 7 times its amount (Reference Example 14). Furthermore, the gel composition containing the above-mentioned oily substance showed good temporal stability under various storage conditions (Examples 33 to 47). As described above, since the above mixture containing a certain concentration of galactose partial decomposition product can contain a large amount of oily substance, the hydrated swelling product of the galactose partial decomposition product has a network structure which can be flexibly stretched while holding the oily substance ( It is inferred that it has a network structure).
Among the oil substances examined in the present example, oleyl alcohol and triolein were relatively less in the amount stably contained in the above mixture than the above-mentioned other oil substances (Reference Examples 16 and 17). However, even when oleyl alcohol and triolein were contained, they showed good temporal stability under constant storage conditions (Examples 50, 51).

As shown in the above-mentioned table, the content of olive oil which can be stably contained in the gel composition using the galactose partial decomposition product at the time of production (at the time of gelation) and over time is 3% by mass aqueous dispersion (water The maximum is shown in the case of (swelled matter). On the other hand, in the case of an aqueous dispersion containing 3% by mass of galactose partial decomposition product (hydrated swelling product), it is stably contained without separating about twice the amount of olive oil as compared with methylcellulose solution of the same concentration. It was shown that it could.
A gel composition using an aqueous dispersion (hydrated swelling product) containing 4% by mass to 5% by mass of galactose partial decomposition product can be stably contained in olive oil without separation as compared with a methylcellulose solution of the same concentration The amount tended to decrease significantly. Unexpectedly, a gel composition containing a galactose partial decomposition product clearly has a unique concentration (3% by mass) that can stably contain an oil substance, which is distinctly different from generally known methylcellulose It became. In a gel composition using an aqueous dispersion (hydrated swelling product) containing 3% by mass of galactose partial decomposition product, a network structure (network structure) suitable for stably incorporating and including an oily substance is formed It is thought that
From the above results, it is possible to produce a gel-like composition stably containing a wide range of oily substances by only partially treating the structure of the aqueous polysaccharide of natural origin, and this gel composition containing an oily substance, The touch was shown to be good.

(Experimental example 10)
Cosmetics (milk lotion) (comparative example 22)
Using the galactose partial decomposition product obtained in Production Example 1, a cosmetic (milk lotion) was produced according to the formulation of Table 18 below which is similar to the formulation described in Patent Document 1 (Japanese Patent Application Laid-Open No. 8-283305). In this experimental example, the galactose partial decomposition product was stirred and dissolved in water under ice temperature. The prepared sample was allowed to stand in an incubator at 50 ° C. for 2 hours, but no shape-retaining gel was formed.

Claims (9)

A method for producing an oil-containing gel composition containing an oil, comprising:
Step (1): A step of obtaining a mixture by mixing galactose partial degradation product of galactoxyloglucan and an aqueous solvent at room temperature;
Step (2): cooling or freezing the mixture obtained in the step (1) to −25 to 10 ° C. ,
Step (3): gelling the mixture obtained in the step (2) by heating to 25 to 60 ° C. ,
An oil-containing gel composition, wherein the oil is added in at least one of the steps (1) to (3) and before the mixture obtained in the step (2) is gelled. Production method.   The method for producing an oil-containing material-containing gel composition according to claim 1, wherein the oil-like material is added in the step (1).   The method according to claim 1 or 2, wherein the oil is added before the mixture obtained in the step (2) is gelled in the step (3). When adding the oily substance in the step (1),
The method for producing an oil substance-containing gel composition according to any one of claims 1 to 3, wherein 0.01 to 20 parts by mass of the oil substance is added to 1 part by mass of the galactose partial decomposition product. In the step (2), when the mixture obtained in the step (1) is frozen,
The method for producing an oil substance-containing gel composition according to any one of claims 1 to 4, wherein in the step (3), the mixture obtained in the step (2) is thawed and the oil is added. When adding the oily substance in the step (3),
The production of the oily substance-containing gel composition according to any one of claims 1 to 5, wherein 0.01 to 700 parts by mass of the oily substance is added to 100 parts by mass of the mixture obtained in the step (2). Method. The method for producing an oil substance-containing gel composition according to any one of claims 1 to 6 , wherein in the step (1), the galactose partial decomposition product and the aqueous solvent are mixed at 18 to 30 ° C. Amount of the galactose moiety decomposition product of said gel composition is from 0.05 to 20 wt%, the production method of the oil-containing gel composition according to any one of claims 1-7. The method for producing an oil substance-containing gel composition according to any one of claims 1 to 8 , wherein the oil substance is liquid or semisolid at normal temperature.