JPS63312400A - Solid soap composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition, having excellent emollient effects and good foaming with hardly any collapse in dissolution, by blending a solid soap component with kaolin,a fatty acid and water-soluble high polymer in specific amounts. CONSTITUTION:The aimed composition obtained by blending a solid soap component with (A) 3-60wt.% (preferably 10-50wt.%) kaolin, (B) 0.5-10wt.% (preferably 1-8wt.%) fatty acid consisting of a saturated fatty acid, such as laurin, unsaturated fatty acid, such as oleic acid, and (C) 0.2-5wt.% (preferably 0.5-3wt.%) water-soluble high polymer consisting of a natural high polymer, such as corn starch, semisynthetic substance, such as methyl cellulose, or synthetic substance, such as PVA.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solid soap composition, and particularly to a solid soap composition that has excellent emollient effects, good lathering, and less disintegration.

[Prior art] Bar soap, which is widely used as a body cleansing agent, is
Generally, the degreasing power is too strong, leaving the skin with a strong feeling of tightness after washing. In order to adjust the degreasing power and make the skin feel moisturized after washing, water-insoluble oils, polymers, etc. are added, or AO8 (alpha olefin sulfonate), AES (alcohol ethoxy sulfate), sodium acylglutamate, etc. have been used in combination. However, the former has the disadvantage that foaming, which is the basic performance of bar soap, is significantly reduced, and the latter has the disadvantage that it becomes slimy when rinsed during use, and furthermore, the soap melts and crumbles.

[Problems to be Solved by the Invention] The object of the present invention is to provide a solid soap composition that is moist after use, that is, has an excellent emollient effect, has good foaming during use, and is less likely to crumble. do.

[Means for solving the problem] As a result of intensive research to achieve the above object, the present inventors found that kaolin, a type of clay mineral,
It has been discovered that the above problems can be solved by blending a predetermined amount of a fatty acid and a water-soluble polymer, and the present invention has been completed.

That is, the solid soap composition of the present invention contains (a) 3 to 60% by weight of kaolin, (b) 0.5 to 10% by weight of fatty acids, and (c) 0.5 to 10% of water-soluble polymer as soap components. It is characterized by containing 2 to 5% by weight.

Kaolin, component (a) of the present invention, is AI! 203・
It is a white clay made of kaolinite whose main component is kaolinite, which is a hydrous aluminum silicate mineral having the composition 2Si02 .2H20. The amount of kaolin blended is preferably 10 to 50% by weight.

Examples of fatty acids as component (b) of the present invention include saturated fatty acids such as lauric acid, myristic acid, stearic acid, palmitic acid, and behenic acid, and oleic acid and linoleic acid.
Examples include those containing unsaturated bonds and branched chains, such as lyrinic acid and isostearic acid. The amount of fatty acid to be blended is preferably from 1 to 8% by weight.

Examples of water-soluble polymers that are component (c) of the present invention include natural polymers such as corn starch, sodium alginate, gum arabic, casein, and collagen; semi-synthetic products such as methyl cellulose, carboxymethyl cellulose (CMC), and carboxymethyl starch; Examples include synthetic products such as polyvinyl alcohol and sodium polyacrylate. The amount of water-soluble polymer blended is preferably 0.5 to 3% by weight.

The bar soap in the present invention can be manufactured according to a conventionally known method. For example, animal fats and oils such as beef tallow, lard, whale fat, non-fat, etc., vegetable oils and fats such as coconut oil, palm oil, palm kernel oil, soybean oil, olive oil, cottonseed oil, etc., individually or in mixtures. It can be produced by saponifying with an alkali etc. or by neutralizing various fatty acids and resin acids with an alkali etc.

In addition to the above-mentioned essential ingredients, the solid soap composition of the present invention may contain other surfactants such as anionic surfactants and nonionic surfactants; higher alcohol;
Arbitrary ingredients such as fragrances, pigments, preservatives, and bactericides can be added as appropriate.

[Effects of the Invention] The solid soap composition of the present invention has excellent moisturizing effect after use, that is, excellent emollient effect, good lathering, and less disintegration.

[Example] Examples of the present invention will be shown below, and the effects of the present invention will be explained more specifically. First, the evaluation method and test method employed in the examples will be explained.

(1) Method for evaluating emollient effect The feeling of use of each sample when used normally was evaluated by 10 expert panelists according to the following criteria, and the average value was taken as the evaluation score for emollient effect.

Feeling after washing the face Moist 5 points Somewhat moist 4 points Average 3 points Slightly firm 2 points Tight 1 point Based on this method, the average rating of 10 panelists is what is recognized as a practically excellent emollient effect. The score is 4 or more.

(2) Foaming evaluation method A single soap of the present invention made from raw materials that does not contain the essential additive components was used as a standard product and evaluated by 10 panelists according to the following criteria, and the average value was taken as the foaming evaluation score.

Comparison with standard product Fairly good 4 points Good 3 points Same 2 points Poor 1 point Based on this method, products that are recognized as having excellent lathering in practical terms are those with an average evaluation score of 3 points or more by 10 panelists. It is.

(3) Melt collapse test The pre-weighed sample was suspended with a wire at 25°C.
It was immersed in 200 mI tap water maintained at 200 mI and left for 2 hours. Thereafter, it was taken out, its weight was measured, and the degree of swelling was determined according to the following formula.

Swelling degree (%) = b-(a-c) / (a-c) x
However, a: Weight before immersion (g) b = Weight after immersion (g) C: Weight of the solution dissolved in water (g) Depending on the degree of swelling, the solution is in a state of collapse (the melt of solid soap is difficult to collapse). (If this is good, the soap is difficult to melt.) was evaluated based on the following criteria.

The melt is in very good condition (swelling degree less than 18%) ◎Good (swelling degree 18% or more and less than 22%) O Fair (swelling degree 22% or more2)
(less than 6%) △Poor (swelling degree 26% or more)
×Example 1 Five types of solid soaps having the composition shown in Table 1 below were prepared by a conventional method, and their properties were evaluated.

The results are shown in the same table.

Table 1 *1 Sodium palm fatty acid/sodium coconut fatty acid = 75/25 As is clear from Table 1, the composition within the scope of the present invention (
Example 1) shows good results in terms of emollient effect, foaming, and dissolution state.

In contrast, compositions (Comparative Examples 1 to 4) that do not contain one, two, or three of kaolin, fatty acids, and water-soluble polymers, which are essential components of the present invention, have an emollient effect, foaming, and dissolution. None of the conditions are fully satisfactory.

Examples 2, 3, 4.5 Six types of bar soaps having the formulations shown in Table 2 below were prepared by conventional methods, and their properties were evaluated.

As is clear from Table 2, compositions within the scope of the invention (
Examples 2 to 5) showed good results in terms of emollient effect, foaming, and dissolution state, whereas Examples 2 to 5) showed good results in terms of emollient effect, foaming, and dissolution state. , 6) have poor foaming or dissolution, and those whose blended amounts of fatty acids and water-soluble polymers, which are essential components, are outside the range of the present invention (Comparative Examples 7 and 8) have poor emollient effect or dissolution. It is in bad condition.

Claims (4)

[Claims] (1) 3 to 60% by weight of kaolin in solid soap ingredients
, fatty acid 0.5 to 10% by weight, and water-soluble polymer 0
．． A solid soap composition containing 2 to 5% by weight. (2) The solid soap composition according to claim 1, wherein the amount of kaolin is 10 to 50% by weight. (3) The solid soap composition according to claim 1 or 2, wherein the content of the fatty acid is 1 to 8% by weight. (4) The solid soap composition according to claim 1, 2 or 3, wherein the water-soluble polymer is blended in an amount of 0.5 to 3% by weight.