JPH07122078B2 - Transparent solid cleaning agent - Google Patents

Description

TECHNICAL FIELD The present invention relates to a transparent solid detergent, and an object thereof is to provide a transparent solid detergent which can be efficiently produced in a short time and which is of high quality.

(Prior Art) Generally, there are various types of detergents such as solid type, powder type, liquid type, cream type, and aerosol type, and the appearance thereof ranges from transparent to opaque. Typical of the transparent solid detergents among them are, for example, sodium soap and tetrakis (hydroxyalkyl) ethylenediamine produced by saponification of fatty acids disclosed in JP-A-57-96099 "Transparent soap composition". And a transparent soap such as a low-alkali solid transparent soap composition containing a polyhydric alcohol and a fatty acid superfatting agent.

Such a transparent stone Ken has been used by many people because of its attractive appearance and mild feel.

Therefore, there is no doubt that not only soap, but also other detergents such as kitchen detergents, daily detergents, shampoos, facial cleansers, etc., are preferred by users because of their excellent appearance color tone if they are transparent and solid.

However, the number of man-hours for manufacturing a normal transparent stone is large and the manufacturing process is long.

At that time, the temperature is 20 to 30 ° C and the humidity is 60 to 65%.
~ There may be a dry aging step for 90 days,
Depending on the case, there may be a step of leaving it for 60 to 90 days without adjusting the temperature and humidity, but after this step, it is manually polished to improve the transparency and commercialize it. .

In addition, the transparency of the finished soap has variations in transparency, and the difference in transparency between lots is also likely to occur at present.

Therefore, it is required for the production of the transparent solid detergent that the time and labor required for the production process, that is, the time and labor are reduced and the produced quality is stabilized.

It has been difficult to obtain a high-quality transparent solid cleaning agent having a very high degree of transparency and no variation in the transparency between the products in a short period of time by the conventional manufacturing method.

The reason is that, in addition to the above-mentioned manufacturing problems, the conventional transparent solid soap has transparency, selection of fats and oils for controlling hardness, such as beef tallow, coconut oil, and composition and use of fatty acids that make up soap. This is because the transparency and hardness change depending on the selection of each alkali.

In addition, alcohol is used as a solvent in the manufacturing process,
After adding a clarifying agent such as a polyol or a saccharide to saponification after saponification with water, it takes a long time and labor for aging as described above, which is a problem.

(Problems to be solved by the invention) In the light of the above-mentioned drawbacks of the prior art, for example, ethanol as a solvent to improve the conventional method, a method of performing a saponification treatment by reducing water extremely is proposed, With this improved method, the number of aging days is shortened, but on the other hand, the saponification step requires a new special equipment.

Furthermore, as a method for producing a transparent solid detergent faster by adding a clarifying agent, a method for releasing anionic surfactants such as lauroyl sarcosinic acid and dodecylbenzene sulfonic acid, triethanolamine acid as an anionic surfactant. , A method of adding a large amount of glycols such as neutral salts such as potassium chloride and potassium sulfate, and aging days by increasing the hardness of soap by adding a carboxylic acid 5-membered ring compound to the soap mixture A method for reducing the above is known as the disclosed technology.

However, although these disclosed methods, etc., shorten the manufacturing time a little, all the aging steps are still required, and they have not been finished by simply pouring like ordinary soap, and products with high transparency cannot be obtained. Not obtained.

In view of the above-mentioned conventional circumstances, the present inventors have made improvements in these drawbacks by using kitchen detergents, daily detergents, shampoos,
We have decided to develop a transparent solid detergent that has a high degree of transparency that can be widely used for face-washing products and that is produced by the pouring method as in the normal soap-making process.

(Means for Solving the Problems) In the invention according to claim 1, at least 6 to 25 parts by weight of fatty acid diethanolamide (shown in the following item (a)) is blended in the detergent composition, and this cleaning is performed. From 55 to 50
It is a transparent solid detergent produced by heating and melting at 100 ° C., then molding, cooling and solidifying.

(A) A fatty acid amide obtained at a reaction molar ratio of a fatty acid (C _{8 to} C ₁₈ ) and diethanolamine of 1: 1.5 to 2.8.

The invention according to claim 2 is characterized in that 2 to 50% by weight of one or more fatty acid soaps (shown in the following item (b)) is blended in the detergent composition. The transparent solid detergent composition according to item 1.

(B) A fatty acid soap comprising a linear or branched fatty acid having 10 to 22 carbon atoms and an alkali selected from alkali metals, amines, alkylolamines and the like.

(Operation of the invention) It can be produced by a pouring method, and is suitable as a daily household detergent for washing from the head to the toes of a human body,
It is a transparent solid type cleaning agent having excellent transparency, hardness, detergency, safety, and feeling of use.

(Examples) The present invention will be made clear by describing examples of the present invention below.

The fatty acid diethanolamide used in this invention is used as a clarifying agent.

This fatty acid diethanolamide has a reaction molar ratio of a fatty acid (having _{8 to 18} carbon atoms) and diethanolamine of 1:
The fatty acid diethanolamine obtained at 1.5 to 2.8 can be preferably used.

The reason why the fatty acid has 8 to 18 carbon atoms is that the fatty acid has C ₁₈
When it exceeds, the solid detergent becomes cloudy, and when it becomes a fatty acid diethanolamide having a carbon number of C ₈ or less, the solid detergent becomes soft, which is not preferable.

Therefore, in the present invention, as the fatty acid, natural coconut oil fatty acid or uraric acid can be preferably used.

Diethanolamine is most suitable as an amine for amidating such a fatty acid.

The molar ratio of fatty acid to diethanolamine of the fatty acid diethanolamide in the present invention is preferably 1: 1.5 to 2.8.

The reason is that a 1: 1 molar ratio reactant, i.e. fatty acid diethanolamide with a molar ratio of less than 1.5, does not act as a clarifying agent and therefore has a
The above is desirable, and even if it exceeds 2.8, it does not have a great effect on the function as a clarifying agent and adversely affects hardness and irritation, so that a molar ratio in the range of 1.5 to 2.8 is desirable after all.

The amount of the fatty acid amide added is preferably 6 to 25% by weight, because if it is less than 6%, the transparency and hardness properties will be impaired, and if it exceeds 25%, the transparency will be impaired and irritation will be impaired. This is because the appearance and foaming are poor and the initial purpose cannot be achieved, and in any case, it is not preferable.

In the present invention, another compounding agent having 10 to 22 carbon atoms is used.
2 to 50% by weight of soap containing the linear or branched fatty acid and an alkali selected from alkali metals, amines and alkylolamines.

Here, the reason for using a fatty acid having 10 to 22 carbon atoms is 10
If it is less than 1, there is a problem in hardness and irritation occurs.
On the other hand, when it exceeds 22, problems occur in transparency and foaming power, which is not preferable in any case.

In the present invention, the amount of soap is set to 2 to 50% by weight,
The conventional transparent solid soap contains 50-70% of soap content, and as a clarifying agent, it contains glycerin, sugars and polyols of 20-70%.
It is composed of 40%, ethanol and water 10-25% in most cases. Therefore, considering the fact that it has a lot of soap content and strong alkalinity, which is not preferable in terms of skin irritation, the content of soap content is as small as possible. In order to make other surfactants have detergency, the amount was reduced to 2 to 55% by weight, but if it is less than 2%, sufficient detergency cannot be obtained, and if hardness exceeds 50%, the conventional method is used. This is because it is the same as the product, that is, the transparency and hardness deteriorate.

In the present invention, as a soap system, a system based on sodium stearate is the most stable and is preferred.

When a fatty acid containing a double bond is used, it becomes soft without exhibiting a solid state according to the purpose, and even saturated fatty acids have 18 carbon atoms.
The amount of the following acid increases and becomes soft, but considering the transparency, a stearic acid purity of 45% or more is necessary to obtain the effect of the present invention.

The alkali content of soap used may be calcium or lithium, but it does not meet the initial purpose due to problems such as softening, becoming too hard, or clouding, Na,
It is preferably selected from K, amines, mono-, di-, tri-alkylolamines.

Next, as the surfactant as another component to be added to the transparent solid detergent according to the present invention, first, anionic surfactants such as alkylbenzene sulfonate, alkylnaphthalene sulfonate, alkyl sulfonate, and α-olefin sulfone are used. Acid salt, dialkyl sulfosuccinate, α-sulfonated fatty acid sodium, N-methyl-N-oleyl taurine, petroleum sulfonate, alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkylphenyl ether sulfate, Polyoxyethylene styrenated phenyl ether phosphate, alkyl phosphate, polyoxyethylene alkyl ether phosphate,
Polyoxyethylene alkylphenyl ether phosphate,
Examples thereof include polyoxyethylene polyoxypropylene alkyl ether phosphate, naphthalene sulfonate, and formalin condensate.

As the nonionic surfactant, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene alkyl ether, polyhydric alcohol fatty acid partial ester (polyhydric alcohol As glucose, glycerin, sorbit, mannitol, maltitol, pentaerythritol, sucrose, fructose) polyoxyethylene polyhydric alcohol fatty acid ester, polyglycerin fatty acid ester, polyoxyethylenated castor oil, fatty acid diethanolamide polyoxyethylene alkylamide, poly Oxyethylene alkylamine, triethanolamine fatty acid partial ester, trialkylamine oxide, etc., amphoteric surfactant , N, N-dimethyl -N- alkyl -N- carboxymethyl ammonium betaine, N, N
-Dialkylaminoalkylenecarboxylic acid, N, N-trialkyl-N-sulfaalkyleneammonium betaine, N, N-dialkyl-N, N-bis (polyoxyethylene sulfate) ammonium betaine, 2-alkyl-1-hydroxyethyl -1-Carboxymethyl imidazolium betaine and the like are used.

Using these surfactants as detergents, sodium stearate is added and solidified.

In addition, more commonly used conditioners such as lanolin and its derivatives, hydrolyzed proteins and their derivatives,
It is possible to mix honey, wheat germ oil, aloe, vitamins, lecithin, hyaluronic acid and its salts, chitin, chitosan and the like with components that do not impair transparency.

After mixing the required ingredients in the desired amounts,
Heat to ~ 100 ° C.

The reason for setting the temperature to 55 to 100 ° C. is that sodium stearate as a solidifying agent does not dissolve below 55 ° C. and some components vaporize above 100 ° C., which is not desirable in any case.

The effects of the present invention will be further clarified by describing Examples and Comparative Examples of the present invention below.

Tables 1 to 4 as Examples 1 to 12 and Comparative Examples 1 to 8
The composition having the composition shown in the table was heated to 90 to 95 ° C., sufficiently foamed, then melted, poured into a mold, and cooled and solidified.

(1) Immediately after adjusting the transparency of the cleaning agents obtained in Examples 1 to 12 and Comparative Examples 1 to 8 (2) After cooling to 0 ° C.,
(3) 2 when the temperature is raised from 0 ℃ to 40 ℃ in 100 hours at a constant temperature
They were observed at 0 ° C and (4) at 40 ° C, respectively.

Further, the hardness of the transparent solid cleaning agent after the adjustment was checked.

As Comparative Examples 9 and 10, the cleaning agent having the composition of Example 1 was used at 50 ° C. for 1 hour.
After melting and cooling at 10 ° C., the same test as above was performed.

The results are summarized in Table 5.

In Table 5, ◯ means good, Δ means a little bad, and x means bad.

In addition, the lanexol AWS in the composition of Table 1 shows polyoxyethylene (50) polyoxypropylene (12) lanolin ether (made by Croda Japan Co., Ltd.).

(Effect of the Invention) In the present invention, 6 to 25 parts by weight of fatty acid diethanolamide (shown in the following item (a)) is blended in a detergent composition, and the detergent composition is heated to 55 to 100 ° C. molten manufactured by molding cooled and solidified after the transparent solid detergent ((a) fatty acid (C ₈ to C ₁₈₎ and the reaction molar ratio of diethanolamine 1: fatty acid amide obtained in 1.5 to 2.8),
And 2 to 50% by weight of one or two or more fatty acid soaps (shown in the following item (b)) in the cleaning composition. Since it is an agent composition ((b) a fatty acid soap containing a linear or branched fatty acid having 10 to 22 carbon atoms and an alkali selected from alkali metals, amines, alkylolamines, etc.),
It can be manufactured by pouring, and is suitable for cleaning the human body from head to toe as a daily household detergent,
The solid agent has the effect of being extremely excellent in transparency, hardness, cleanability, safety, and feeling of use.

Claims (2)

[Claims] 1. At least 6 to 25 parts by weight of a fatty acid diethanolamide (shown in the following item (a)) is blended into a detergent composition, and the detergent composition is heated to 55 to 100 ° C. and melted. A transparent solid detergent produced by molding, cooling and solidification. (A) A fatty acid amide obtained at a reaction molar ratio of a fatty acid (C _{8 to} C ₁₈ ) and diethanolamine of 1: 1.5 to 2.8. 2. The cleaning composition contains 2 to 50% by weight of one or more fatty acid soaps (shown in the following item (b)) in the cleaning composition. The transparent solid detergent composition of. (B) A fatty acid soap comprising a linear or branched fatty acid having 10 to 22 carbon atoms and an alkali selected from alkali metals, amines, alkylolamines and the like.