JPS5975999A - Transparent solid soap - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transparent bar soap in which 0.5 to 6.0% by weight of the fatty acids constituting the soap portion are straight chain saturated fatty acids having 20 to 260 carbon atoms. The present invention relates to a transparent bar soap in which the fatty acid is selected from one or more of adipic acid, behenic acid, lignoceric acid, and cerotic acid. This type of transparent bar soap has good foaming properties, is less likely to melt, break down, and swell, and its transparency is not affected by seasonal fluctuations during manufacturing, resulting in stable quality, and is superior to conventional transparent bar soaps. -1- A transparent bar soap with improved transparency can be provided.

Conventionally, when producing transparent bar soap by the frame line method, the raw material source was natural animal and vegetable fats such as beef tallow, coconut oil, palm oil, palm kernel oil, or fatty acids obtained by decomposing these (main components having carbon numbers). Using 8 to 18 saturated fatty acids and unsaturated fatty acids), add lower alcohol and water to 6
Dissolve by heating at 0 to 80C, saponify or neutralize with an alkaline agent such as sodium hydroxide, and add sugars, polyalkaline earth metal ion sequestrants, and fragrances, pigments, etc. to the resulting reaction product. A method of solidifying the added transparent soap glue by cooling has generally been used, but the soaps obtained by such a method inherently have disadvantages such as poor transparency and often opacity. The causes of this are believed to be volatilization of lower alcohols and evaporation of water during the saponification or neutralization reaction, and differences in cooling solidification conditions, that is, cooling rates.This phenomenon is also caused by seasonal fluctuations in temperature and It is strongly influenced by the environment such as humidity, and for example, soap with good transparency cannot be obtained unless the amount of water used as a solvent is adjusted in summer and winter.

As countermeasures against this problem, strict control of lower alcohol volatilization and water evaporation during the reaction, as well as cooling and solidification conditions, and increasing the amount of clarifying agents such as sugars and polyhydric alcohols have been taken.

However, on the other hand, stricter manufacturing conditions worsen workability, and when sugars such as sorbitol and white sugar are added, recrystallization of the sugars progresses as well as drying of the soap at the end of the process. There was a drawback that crystals were deposited on the soap surface, impairing transparency. Furthermore, when a large amount of a polyalcohol such as glycerin is added, the soap does not have high hygroscopicity and tends to soften due to moisture absorption, resulting in the soap surface sweating and becoming sticky.

Therefore, the inventor of the present invention has solved the above-mentioned drawbacks by creating a soap that maintains good foaming properties like conventional soaps, has almost no melting or blurring, and is free from solvents used during manufacturing, such as water. As a result of intensive research to obtain a transparent bar soap that is almost unaffected by the amount of added lower alcohols and has even greater transparency than conventional transparent bar soaps, we found that
By adding 0 to 26 straight chain saturated fatty acids to the raw materials, the range of addition amounts of lower alcohols and water that can obtain transparency when cooling and solidifying transparent soap glue is expanded;
That is, transparency can be obtained without being affected by the volatilization of lower alcohols during the reaction or evaporation of water, nor is it affected by the cooling solidification rate. The present invention was achieved by discovering that the transparency is even better than that of conventional transparent soaps even without increasing the amount of polyhydric alcohols or polyhydric alcohols.

The present invention uses fatty acid components constituting the soap portion, such as fatty acid components having 8 to 18 carbon atoms derived from animal and vegetable oils or
0.5 to 6.0% by weight of straight chain saturated fatty acids having 20 to 26 carbon atoms in the soap component consisting of ~26 higher fatty acids
Transparent bar soap 1 (
It is related to

Carbon number 20 or more applied as an essential component in the present invention
26 straight chain saturated fatty acids with structural formula CnHzn+tCOO
It is represented by H, arachidic acid (20 carbon atoms)
, behenic acid (22 carbon atoms), lignocerin # (2 carbon atoms)
4), cerotic acid (carbon number 26), etc., which can be selected from one or a mixture of two or more of these,
Behenic acid is the preferred raw material in terms of cost.

Regarding these fatty acids, for example, arachidic acid is present in coconut oil at a content of 0.4% by weight or less, and in olive oil at a content of 0.1 to 0.1% by weight.
Behenic acid exists in a trace amount of 0.3% by weight, and 0.6-2.5% by weight in rapeseed oil, and is used as a raw material for creams and active agents, but it is also used in soap materials and similar cleaning agents. It has rarely been applied as a composition material, and its clarifying effect in soap is completely unknown until now. Coconut oil, beef tallow other than olive oil, palm oil, palm kernel oil, It is said that animal and vegetable oils and fats such as castor oil contain a large amount of the above-mentioned fatty acids.

Next, the amount of the linear saturated fatty acid having 20 to 26 carbon atoms in the present invention will be described.
5 to 6.0% by weight, preferably ID to 4.0% by weight. If the amount is less than 0.5% by weight, the transparency will be insufficient, and the amount is 6.0% by weight. If the amount is more than 0.0% by weight, the solidity (plasticity of stamping) will deteriorate and clear stamping will not be possible, and if the number of carbon atoms in the linear saturated fatty acid is less than 20, transparency is insufficient,
If the number of carbon atoms is more than 26, the solidity will be poor and good molding will not be possible.

In other words, one of the important physical properties when manufacturing transparent bar soap is
The solidity of transparent bar soap (plasticity of molding) is influenced by the type of fatty acids that make up the soap part.
In the case of straight-chain saturated fatty acids, the soap will generally become less hard as the number of carbon atoms increases, and in the case of unsaturated fatty acids, it will become softer, so it is usually necessary to find a combination of fatty acids suitable for solidity. . In general, for example, when the main ingredients are beef tallow and coconut oil, which are natural animal and vegetable oils, beef tallow: coconut oil = 60
~so: A ratio of 40 to 20 gives good solidity, but since the oleic acid component accounts for 25 to 42% by weight, the freezing point of this transparent soap glue becomes low and it becomes opaque when solidified by cooling. It's easy. On the other hand, straight chain saturated fatty acids have a high freezing point, and the freezing point increases as the number of carbon atoms increases, and by adding this to transparent soap glue, it becomes transparent when solidified by cooling. In particular, in the case of straight-chain saturated fatty acids having 20 to 26 carbon atoms, the transparency effect is remarkable, and the amount to be added is sufficient to have no effect on solidity, and it is necessary to achieve a good balance between solidity and transparency. . Carbon number 28 to create a transparent effect
When the above-mentioned straight chain saturated fatty acids are used, solidity deteriorates, so it is not preferable.

Furthermore, when the straight chain saturated fatty acids having 20 to 26 carbon atoms are used, the transparent bar soap obtained by cutting, drying and molding has excellent transparency and does not reduce detergency or foaming power. It is.

8- Next, the outline of the manufacturing method of the present invention will be explained. The blending ratio of each raw material is shown in parts by weight as follows.

C [Alcohols 45-65A, B
, C was mixed and heated in a reaction vessel for 50 to 80 CK,
Separately prepared D is added to neutralize or saponify, and after the reaction is completed, the temperature is maintained at 60 to 801 Z', and then E is added to dissolve E to obtain a transparent soap glue. After adjusting the free alkali, it is poured into a predetermined frame, cooled and solidified at room temperature, and then cut, dried and stamped to form a transparent bar soap.

The present invention is a transparent bar soap in which 0.5 to 6.0% by weight of the fatty acids constituting the soap portion is a straight chain saturated fatty acid having 20 to 26 carbon atoms; is a transparent solid soap made of one or more selected from arachic acid, behenic acid, lignoceric acid, and cerotic acid, and maintains excellent transparency without becoming opaque while the transparent soap glue is cooled and solidified. There are no problems in solidity, foaming properties, or detergency, and it is similar to ordinary transparent bar soap. This improvement in transparency is due to the carbon number of 20~
26 straight chain saturated fatty acids make up the soap moiety 0
．． This is due to the presence of a weight ratio of 5 to 6.0.

Next, in the blending ratio of each raw material, the total of raw materials A and B is 1 ooxp, and only behenic acid is applied to raw material B,
Table 1 shows the results of the effect of the amount of behenic acid added in the formulation when transparent bar soap was produced according to Example 1 below.
, Table 2, and Table 3.

Table 11 shows the amount of behenic acid blended and its effect on solidity and transparency; Table 2 shows the relationship between cooling solidification conditions and transparency depending on the presence or absence of behenic acid; This shows the amount of solvent and transparency depending on whether behenic acid is added or not.

11- In Table 1, the case where the amount of behenic acid added was 4 Kf corresponds to Example 1, and in the other cases, behenic acid and beef tallow decomposed fatty acid were replaced by increasing or decreasing as appropriate.

Table 2 When behenic acid is not added, beef tallow decomposition fatty acids are increased by 4 kg.

Table 3 12- When behenic acid is not added, the amount of beef tallow decomposed fatty acids is increased by 2 to 4.

As is clear from Tables 1, 2, and 3, the formulation of behenic acid has better transparency than conventional transparent bar soaps without increasing the amount of sugars or polyhydric alcohols, and the amount of solvent can be applied. It is an excellent transparent bar soap that improves production conditions such as expanding the range and relaxing cooling and solidifying conditions, and does not reduce detergency and foaming power.Next, examples of the present invention will be shown.

Example 1 Beef fat decomposition fatty acid 61 to 2, coconut oil decomposition fatty acid 25KF,
Oleic acid 10 Kf! , 100 KpK of a mixed fatty acid consisting of 4 Kf of behenic acid and 55 Kf of ethanol were added, mixed and heated to 50 to 60 C in a reaction vessel, and neutralized with an alkaline agent prepared by dissolving 9 in 16.5 Kf of sodium hydroxide and 50 Kf of water. After the completion of the reaction, while maintaining the temperature for 60 to 80 minutes, add 20 parts of glycerin, 10 parts of sorbitol, and 25 parts of white sugar.
KP and an appropriate amount of residual ion sequestering agent, coloring agent, and fragrance are added and dissolved to form a transparent soap glue.After adjusting the free alkali, it is poured into a specified frame and cooled and solidified at room temperature. It is cut to size (~, dried, and molded into transparent bar soap).

Example 2 Beef tallow 65KF, coconut oil 32 and 9. Behenic acid 2.5KP,
Serotinic acid 0.5? Add 55 Kf of ethanol to 100 Kf of the mixture, heat the mixture to 60-80C in a reaction pot, and hydroxylate separately) IJum (16.5 Kf)
to 50 water? Saponify it with an alkaline agent dissolved in 1. After the reaction is complete, add and dissolve 9 and an appropriate amount of a sequestering agent, coloring agent, and fragrance to 25 white sugar while maintaining the temperature at 60 to 80 C to make a transparent 15-. Cut, dry, and mold the soap - After adjusting the free alkali, pour into a designated frame and cool and solidify at room temperature.Then, cut into a designated size, dry, and mold the soap. It is made into a transparent bar soap.

Example 3 Beef tallow decomposition fatty acid 60? , coconut oil decomposed fatty acids 24 KP
, 10KF of mixed fatty acids consisting of 10KF of oleic acid, 4KP of arachidic acid, and 211P of lignoceric acid were added to 55% of ethanol, mixed and heated in a reaction pot at 50-60r, and separately mixed with 16% of sodium hydroxide and 0% of potassium hydroxide. .5 Neutralize Ky with a mixed alkaline agent dissolved in 5oKp of water, and after the reaction, add and dissolve 10KP of glycerin, 20Kf of white sugar, and appropriate amounts of metal ion sequestering agents, colorants, and fragrances while maintaining the temperature at 60 to 80tl'. After adjusting the free alkali, the mixture is poured into a predetermined container, cooled and solidified at room temperature, and then 16-treated to form a transparent bar soap.

Applicant: POLA CHEMICAL INDUSTRIES, INC. Sanwa Chemical Industry Co., Ltd. Agent Mutsumi Nozawa Aki

Claims (2)

[Claims] (1) A transparent solid soap characterized in that 0.5 to 6.0% by weight of the fatty acids constituting the soap portion are linear saturated fatty acids having 20 to 26 carbon atoms. (2) The transparent resin according to claim 1, wherein the straight-chain saturated fatty acid (having 20 to 26 carbon atoms) is selected from one or more of arachidic acid, behenic acid, lignoceric acid, and cerotic acid. solid soap.