JPS58162700A - Transparent solid detergent - 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 improvements in transparent soaps used in facial cleansing soaps and the like. Conventional transparent soap manufacturing involves adding sucrose to sodium fatty acids, adding a large amount of aliphatic primary alcohol such as ethanol as a clarifying agent, and heating and dissolving the mixture.
This is poured into a frame as an alcohol solution of about 100 ml, cooled, and solidified.

Alcohol in large amounts irritates the skin and has antifoaming properties, so the alcohol is evaporated to remove these drawbacks.

As the alcohol evaporates, it gradually becomes transparent, but at the same time its volume shrinks, reaching about 20% during the drying period of about 45 days. As a result, distortions occur in the shape, and complicated manual work is required to correct this, which has not allowed us to break away from the craft industry, and combined with the low productivity of long drying times, despite the increasing demand for transparent soap. Mass production is being blocked. Attempts have been made to improve this drawback, but in all cases, ethanol is treated as an essential component for transparency, making it impossible to omit the fundamentally uneconomical step of drying.

-This invention is based on research aimed at making the fibrous crystals of sodium fatty acids smaller than the wavelength of visible light and facilitating the transmission of light. This was based on a new discovery, and as a result, ethanol was no longer necessary for making soap transparent, and it was of revolutionary significance in that it paved the way for the continuous production of transparent soap.

Sodium fatty acid and propylene glycol/l/,
1. Add N-acylglutamic acid alkali salt to a homogeneous molten mixture with glycols such as 8-butylene glyco-μ, glycerin, and sorbinod, mix well, and cool to obtain a transparent solid detergent. It will be done. Among them, the effect of N-acyl glutamic acid monoalkali salts is dramatic and is effective even in small amounts, but the effect of dialkali metal salts is drastically reduced, so care must be taken to ensure that the free alkali content is 0% before adding monoalkali salts. you need to pay.

Therefore, in reality, it is safe to add monoalkali salt to the base. Even if the amount of monoalkali salt added is large, the transparency effect remains, and the P of the 1% aqueous solution of the product is
The H value is closer to neutral, so it is suitable for people with sensitive skin, but it tends to swell with water, so it is better to use it in areas 2-15. When an organic amine such as triethanolamine is used as the alkali, it is equally effective as ditriethanolamine salt and monotriethanolamine salt. In addition, the two carboxylic acid groups contained in the molecule of N-acylglutamic acid are replaced by an alkali metal and an organic amine.
An alkali salt in the form of a neutralized carboxylic acid group also works effectively. If you want to get a more silky texture, you can also add sucrose as a humectant to make a good transparent solid detergent. It is better to add a plurality of glycols in combination rather than singly, and the amount of glycol used tends to decrease when a large amount of fatty acid sodium containing an OH group in the molecule is used.

Adding fatty acid potassium can reduce the hardness of the product.

Next, an example of the method for manufacturing the transparent solid cleaning agent of the present invention will be explained. A calculated amount of sodium hydroxide aqueous solution and glycols were placed in a stainless steel reaction tank and heated to 60°C. Preliminarily melted fatty acids are added dropwise to this and stirred well to form a uniform mixture of sodium fatty acids and glycols. After adjusting the free alkali to 0%, the required N-acylglutamic acid alkali salt is added and mixed well, and if necessary, fragrances, pigments and other substances are added. Make sure to maintain the temperature above 80°C throughout the entire process. A transparent solid cleaning agent can be obtained by rapid cooling after vacuum degassing. Transparent soap with a special shape,
For example, to apply this to the production of transparent soaps shaped like animals or fruits, cool the soap to around 75℃ and then add 2 to 5 parts of ethanol.The viscosity will drop rapidly, so pour this into each mold. If you do this, no air bubbles will remain in the product.

(Example Table 2)

Claims (1)

[Claims] 15 to 70 parts of sodium fatty acids and 5 to 70 parts of glyco-P
60 parts and O,1~ of N-acylglutamic acid alkali salt
A transparent solid detergent consisting of 80 parts as a main ingredient.