JP3349219B2 - Cosmetic base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic base material comprising a low-viscosity cationized hydroxyalkylgalactomannan which has a good affinity for hair and skin and gives a good feeling of use and finish.

[0002]

2. Description of the Related Art The use of natural products and derivatives thereof as cosmetic base materials is becoming popular, and the use of water-soluble polymer compounds obtained by cationically modifying cellulose derivatives and starch has attracted attention. For example, Japanese Patent Publication No. 47-20635
The gazette discloses cellulose derivatives in which quaternary nitrogen is introduced into shampoos and hair cosmetics. Japanese Patent Publication No. Sho 60-42763 discloses that cationized hydroxyalkyl starch into which quaternary nitrogen is introduced is used for shampoos, rinses, creams and the like.

[0003]

Among these cation-modified polymers, hydroxyethylcellulose hydroxypropyltrimethylammonium chloride ether and guar gum hydroxypropyltrimethylammonium chloride ether are currently used but are not sufficiently satisfactory. For example, shampoos and hair cosmetics using them provide a slimy, moist, and soft feel when washing and rinsing, but cause unpleasant stickiness in the process of drying the hair, and cationic modification as the hair dries. The complex was not yet satisfactory because the complex of the polymer and the surfactant solidified and the hair after drying could not have a desirable feel, for example, causing stiffness. In view of such circumstances, an object of the present invention is to provide a cosmetic base material that gives a good feeling of use and a finished feeling that has been difficult with conventionally used raw materials.

[0004]

According to the present invention, various studies have been made to achieve the above object. As a result, a hydroxyalkyl ether of galactomannan having an MS value of 0.1 to 1.8 is added to a glycidyl trialkyl ammonium salt or 3-halogeno. −
Before, simultaneously or after reacting the 2-hydroxypropyltrialkylammonium salt so as to contain a quaternary nitrogen content of 0.2 to 3% by weight, a 30% aqueous solution has a viscosity of 30 to 500 cps at 30 ° C. It has been found that various cosmetics achieving the object of the present invention can be produced by using the low-viscosity cationized hydroxyalkylgalactomannan of the present invention, and the present invention has been completed.

[0005] Galactomannan is a neutral polysaccharide in which a galactose unit is contained as a side chain in a main chain having mannose as a constitutional unit. Naturally, galactomannan is mainly contained in seeds of leguminous plants. Guar gum and locust bean gum as raw materials are typical plant gums containing galactomannan as a main component. Here, MS indicating the degree of hydroxyalkyl etherification of galactomannan is a numerical value indicating the number of moles of alkylene oxide added per anhydrosugar unit of galactomannan. The hydroxyalkyl ether of galactomannan has two to two carbon atoms in galactomannan.
4, 1,2-alkylene oxides, ie, ethylene oxide, 1.2-propylene oxide, 1.2-butylene oxide are used. These alkylene oxides are added so that the MS value is in the range of 0.1 to 1.8, preferably 0.3 to 1.0.

The low-viscosity cationized hydroxyalkyl galactomannan used in the present invention is obtained by converting a galactomannan hydroxyalkyl ether into a general formula (II) represented by the following formula (2) or a general formula (I) represented by the following formula (3)
The compound of the formula II) having a nitrogen content of 0.2 to 3% by weight
It can be manufactured by reacting so that

Embedded image

Embedded image This cationization reaction can be performed according to a known etherification method. For example, in the presence of an alkali catalyst, a compound of the above general formula (II) or (III) is added to an aqueous or alcoholic suspension of galactomannan hydroxyalkyl ether or a dry state containing a small amount of a solvent, followed by heating reaction. After completion of the reaction, neutralization can be carried out. The general formula (II) or (III)
Examples of the compound include glycidyltrialkylammonium salt and 3-halo-2-hydroxypropyltrialkylammonium salt such as glycidyltrimethylammonium chloride, glycidyltriethylammonium chloride, glycidyltripropylammonium chloride, glycidylethyldimethylammonium chloride,
Glycidyl diethylmethylammonium chloride and its corresponding bromide, iodide, 3-chloro-2
-Hydroxypropyltrimethylammonium chloride, 3-chloro-2-hydroxypropyltriethylammonium chloride, 3-chloro-2-hydroxypropyltripropylammonium chloride, 3-chloro-
2-hydroxypropylethyldimethylammonium chloride and the corresponding bromides and iodides.

The low viscosity cationized hydroxyalkyl galactomannan used in the present invention can be obtained by reducing the molecular weight of galactomannan before, simultaneously with, or after the cationization reaction of the galactomannan hydroxyalkyl ether. As a method for lowering the molecular weight,
By hydrolyzing galactomannan molecules using acids such as hydrochloric acid, nitric acid, sulfuric acid, formic acid and acetic acid, galactomannan degrading enzymes, oxidizing agents such as sodium hypochlorite, hydrogen peroxide, ammonium persulfate and potassium persulfate can get. These depolymerization reactions can be performed according to a known method. For example, it is obtained by adding an acid, a decomposing enzyme, an oxidizing agent, etc. to an aqueous or alcoholic suspension of galactomannan hydroxyalkyl ether or a dry state with a small amount of a solvent, and performing a heat reaction to neutralize the reaction after the reaction. . Any of an acid, a decomposing enzyme, and an oxidizing agent may be used for lowering the molecular weight. However, for lowering the molecular weight at the same time as the cationization reaction, an oxidizing agent that operates even under highly alkaline conditions is preferable. The degree of depolymerization is such that the 30% viscosity of the 30% aqueous solution is 3 to 500 cps, preferably 10 to 400 cps.
The molecular weight is reduced until

[0008] If the MS value of the galactomannan hydroxyalkyl ether used in the present invention is less than 0.1, the flexibility of the film covering the skin and hair becomes poor, so that the feel and combability are deteriorated. If the number of moles exceeds 1.8, the water absorption is increased, giving a sticky feeling after use. If the content of nitrogen introduced by the cationization reaction is less than 0.2% by weight, it is blended into a cosmetic to lower the affinity for hair and skin, and if it exceeds 3% by weight, the It is not preferable because it gives a sticky feeling when using the material. A particularly preferred range for the nitrogen content is 0.5-2.0% by weight. Further, the degree of molecular weight reduction is such that if the 30% viscosity of the 30% aqueous solution is less than 3 cps, the slimming feeling will be insufficient when it is blended with shampoo, etc., and if it exceeds 500 cps, unpleasant stickiness will be caused in the process of drying the hair. As it forms or dries, the complex with the surfactant solidifies and causes stiffness. The preferred range of the viscosity is 10 to 400 cps.

The cosmetic of the present invention can be obtained by mixing a required amount of the low-viscosity cationized hydroxyalkyl galactomannan into a hair cosmetic, a skin cosmetic or the like having a known formulation. The cosmetics are not limited to those described above, but particularly preferred are cosmetics that are washed away with water at the time of use such as shampoo, rinse and cleansing cream. Other components in the cosmetic using the cosmetic base material of the present invention are not particularly limited, and may be ordinary cosmetic carriers, diluents or additives [eg, various surfactants, oily substances (eg, long-chain fatty acid esters). , Hydrocarbons, etc.), hydrolyzed proteins, lanolin, lipids, fragrances, ultraviolet absorbers, hydrotropes, etc.]. Also, vitamins and other nutritionally or pharmaceutically active ingredients may be added.

The amount of the cosmetic substrate of the present invention varies depending on the use and the like, but is usually preferably in the range of 0.1 to 7% by weight. If the amount is less than 0.1% by weight, the effect is not sufficiently exhibited.
Exceeding the weight% may give an unpleasant feel.

[0011]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the invention thereto. “Parts” used in the following examples are parts by weight unless otherwise specified. Example 1 60 g of guar gum is added to a glass pressure-resistant reactor containing 3 g of caustic soda in 26 g of water and 100 g of methanol while stirring. Subsequently, 35 g of ethylene oxide was introduced at a pressure of 1.5 kg / cm ² using nitrogen, and then 50 ° C.
To react. As the reaction proceeded, a decrease in the pressure in the system was observed. After the pressure drop is no longer observed,
The reaction was further allowed to proceed at 50 ° C. for 1 hour, the pressure in the reaction system was released, 40 g of glycidyltrimethylammonium chloride was added as an aqueous solution, and 25 g of 35% aqueous hydrogen peroxide was added, followed by reaction at 50 ° C. for 5 hours. After completion of the reaction, 30 g of a 10% hydrochloric acid aqueous solution is added, and neutralization is performed at room temperature for 1 hour. After the neutralization was completed, the reaction solution was poured into a large amount of methanol to precipitate a reaction product, which was separated by filtration. The obtained precipitate was washed three times with 500 g of methanol each time, and then dried under reduced pressure to obtain 103 g of a reaction product. The MS value of the ethylene oxide added with the low-viscosity cationized hydroxyalkyl guar gum thus obtained was 1.2, the nitrogen content was 2.4% by weight, and the 30% viscosity of the 30% aqueous solution was 320 cps. (Sample No. 1)

Example 2 According to the method of Example 1, low viscosity cationized hydroxyalkyl guar gum and low viscosity cationized hydroxyalkyl locust bean gum having different quaternary nitrogen contents and viscosities were synthesized. The results are shown in Tables 1, 2 and 3.

[Table 1]

[Table 2]

[Table 3]

Example 3 A shampoo having the composition (A) shown in Table 4 was prepared using the low-viscosity cationized hydroxyalkyl guar gum or the low-viscosity cationized hydroxyalkyl locust bean gum obtained in Examples 1 and 2. did. The composition (B) is a composition prepared for comparison, which does not contain a low-viscosity cationized hydroxyalkylgalactomannan.

[Table 4] As low viscosity cationized hydroxyalkyl galactomannans, sample numbers 1, 2, 4, and
5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
Eighteen kinds of 15, 18, 20, 21 and 22 were selected. Fifteen women were allowed to use each of the 19 types of shampoos, which were obtained by combining the 18 types of shampoos with the composition (B), and compared the performance such as foaming, sliminess, and softness of hair after use. The results are shown in Tables 5, 6, and 7. The numerical values shown in these tables are the values obtained by subtracting the number of persons having the excellent composition (B) from the number of persons having the excellent composition (A).

[Table 5]

[Table 6]

[Table 7] From the results in Table 5, it can be seen that when the MS value of the alkylene oxide addition is 0.1 or more, the feel is improved both during use and after use. (1 for sample number 2 in Table 5,
From the results in Table 6, when the nitrogen content is 0.2% by weight or more, the performance of the shampoo is improved, but the nitrogen content is 3% by weight or more. When it comes
It can be seen that the stickiness after use increases, which is a negative factor in overall preference. (Sample No. 8 in Table 6
From the comparison of 9, 10, 11, 12, and 13) Further, from the results in Table 7, the 30 ° C. viscosity of the 30% aqueous solution was 3 cp.
When the speed is lower than s, the slimy feeling is insufficient, and when the speed is higher than 500 cps, there is a sticky feeling. (From comparison of 15, 18, 20, 20, 21 with sample numbers 14, 22)

Example 4 To compare with the low viscosity cationic hydroxyalkyl galactomannan used in the present invention, the addition MS value of ethylene oxide was 1.65, the nitrogen content was 1.8% by weight, and the 30% viscosity of a 30% aqueous solution was 20%. 10,000 cps or more (30,000 cp at 5%
A shampoo having the composition (A) shown in Table 4 of Example 3 was prepared using the cation-modified hydroxyethyl cellulose of s). A test by 15 women also showed that the base material of the present invention was superior to cation-modified hydroxyethylcellulose in terms of non-stickiness and combability after use.

Example 5 A cream type hair rinse having the composition shown in Table 8 below was prepared using Sample No. 1 in Table 1, Sample No. 11 in Table 2 and Sample No. 17 in Table 3 as the cosmetic base material of the present invention.

[Table 8] This hair rinse had an excellent texture at the time of use and after use as compared with the hair rinse not containing the cosmetic base material of the present invention.

Example 6 A cleansing cream having the composition shown in Table 9 below was prepared using the same sample of Example 5 as the cosmetic base material of the present invention.

[Table 9] This cleansing cream had a better elongation and an excellent oily feeling during use as compared with the case where the cosmetic base material of the present invention was not blended.

Example 7 A neutral cream having the composition shown in Table 10 below was prepared using the same sample as in Example 5 as the cosmetic base material of the present invention.

[Table 10] This neutral cream was excellent in smoothness and moist feeling as compared with those without the cosmetic base material of the present invention, and the effect lasted for a long time.

[0018]

The cosmetic substrate of the present invention has the following advantages. (1) It has good affinity for hair and skin, good film-forming properties, and excellent adsorptivity to them. (2) It is excellent in heat retention, moisturizes hair and skin, gives the hair lumpy flexibility, and improves the gloss of hair. Moreover, these effects are persistent. (3) As it imparts smoothness to hair and skin, the feel after use becomes smooth, and when used in shampoo, hair combs become better, squeaky feeling disappears, and when used in creams, etc. Good feeling of use and finish can be imparted.

Continuation of the front page (56) References JP-A-4-306245 (JP, A) European Patent Application Publication 529883 (EP, A1) European Patent Application Publication 530974 (EP, A1) International Publication 93/6205 (WO, A1) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61K ^7/ 00-7/50 CA (STN)

Claims (1)

(57) [Claims] 1. A hydroxyalkyl ether of galactomannan having an MS value of 0.1 to 1.8, wherein a part of the hydroxyl group is substituted by a residue represented by the following general formula (I). It has a structure and a nitrogen content of 0.
A 30% aqueous solution having a viscosity of 3 to 500% at 2-3% by weight.
A cosmetic base comprising an acid-treated cationized hydroxyalkyl galactomannan that is cps. Embedded image