JP2501632B2 - Liquid soap composition - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a novel personal cleansing liquid soap composition. More specifically, the present invention is a high-grade fatty acid soap which is particularly excellent in foamability during use, creaminess of foam, sustainability of foam, smoothness of foam, and the like, and which is excellent in smoothness of skin after use. The present invention relates to a liquid soap composition containing as a main component.

2. Description of the Related Art Conventionally, synthetic anionic surfactants such as higher fatty acid soap, sodium α-olefinsulfonate, and alkyl ether sulfate have been known as detergent active ingredients used in liquid detergents for personal cleansing.

However, these cleansing active ingredients are not always sufficiently satisfactory, and for example, the former higher fatty acid soap has a drawback in that it has poor rinseability and a refreshing feeling after use, but is inferior in foamability, and the latter. Although the synthetic anionic surfactant (1) has good foamability, it has a drawback that it is inferior in foam creaminess and sustainability.

Therefore, the above-mentioned higher fatty acid soaps and synthetic anionic surfactants are rarely used alone in liquid detergents for body washing such as body shampoos, and higher fatty acid soaps and synthetic anionic surfactants or nonionic surfactants are rarely used. Used in combination with a surface active agent. However, even in a composition comprising such a combination, the foamability during use, the creaminess of the foam, the sustainability of the foam, the smoothness of the foam, etc. are good, and sufficient skin smoothness is obtained after use. It is the current situation that none of the properties required for liquid cleansing agents for body washing have been sufficiently satisfied.

On the other hand, it has been attempted to add a water-soluble polymer compound for the purpose of giving rich foaming (Japanese Patent Laid-Open No. 61-739).
No. 9 bulletin etc.). However, in this attempt,
It is difficult to sufficiently enhance the creaminess of the foam, and when a cationic polymer compound is used, a highly hydrophobic complex formed with this and soap remains on the skin after use, It has the drawback that the smoothness of the skin afterwards is unavoidable.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention overcomes the drawbacks of the conventional liquid cleansing agents for body washing, and has the foamability during use, the creaminess of foam, the sustainability of foam, and the smoothness of foam. Good and
The purpose of the present invention is to provide a liquid soap composition for personal cleansing, which is excellent in the smoothness of the skin after use.

Means for Solving the Problems As a result of intensive studies to develop a liquid soap composition having such preferable properties, the present inventors have determined that a higher fatty acid soap, a cationic polymer and polyethylene glycol are prescribed. It was found that the composition containing the above-mentioned ratio could meet the above-mentioned object, and the present invention was completed based on this finding.

That is, the present invention provides (A) higher fatty acid soap 5 to
A liquid soap composition comprising 40% by weight, (B) 0.01 to 1% by weight of a cationic polymer and (C) 0.05 to 2% by weight of polyethylene glycol having an average molecular weight of 15,000 to 4,000,000 as essential components. It is provided.

 Hereinafter, the present invention will be described in detail.

In the composition of the present invention, the higher fatty acid soap used as the component (A) is not particularly limited, and those produced by a conventionally known method, for example, animal fats and oils such as beef tallow and sheep's fat, coconut oil, palm Of vegetable oils and fats represented by oil, palm kernel oil, soybean oil, olive oil, safflower oil, cottonseed oil, or higher fatty acids such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and behenic acid. At least one selected from the above, sodium hydroxide, potassium hydroxide,
Those saponified or neutralized with an alkali such as triethanolamine can be used.

The blending amount of the higher fatty acid soap is selected in the range of 5 to 40% by weight, preferably 10 to 30% by weight, based on the weight of the composition, from the viewpoints of system stability and usability.

The cationic polymer used as the component (B) in the composition of the present invention is a water-soluble cationic polymer compound having a quaternary nitrogen, and as such a compound, a compound represented by the general formula (1 and m in the formula are 0 or 1, and the sum thereof is 1, and n is an integer of 100 to 5,000), a polydimethyldiallylammonium chloride type cationic polymer compound represented by the general formula: (1 and m in the formula are 0 or 1, and the sum thereof is 1, and the sum of n ′ and n ″ is an integer of 500 to 10,000) and dimethyldiallylammonium chloride and acrylamide Copolymer type cationic polymer compound and general formula (R in the formula is a hydrogen atom, a hydroxyethyl group or At least one selected from the cationized products of hydroxyethyl cellulose represented by the formula (p is an integer of 50 to 20,000) is preferably used.

As the polydimethyldiallylammonium chloride type cationic polymer compound represented by the general formula (I), for example, Marcoat 100 (manufactured by Merck & Co., Inc.) and the like are dimethyldiallylammonium chloride represented by the general formula (II). As the copolymer type cationic polymer compound of acrylamide and acrylamide, for example, Marcoat 550
(Manufactured by Methyl Co., Ltd., etc.) are hydroxyethyl cellulose cation compounds represented by the general formula (III), for example, polymers JR-125, -400 (manufactured by Union Carbide Co., trade name) and Leoguard G [Lion (stock). )
, Product name, etc. are commercially available.

The amount of these cationic polymers blended is 0.01 to 1% by weight, preferably 0.03 to 0.5, based on the weight of the composition.
It is selected in the range of weight%. If the blending amount is less than 0.01% by weight, the creaminess of the foam and the smoothness of the foam are not sufficient, and if the blending amount exceeds 1% by weight, the viscosity becomes too high and good liquidity tends to be unable to be obtained.

In the composition of the present invention, polyethylene glycol is used as the component (C). The polyethylene glycol needs to have an average molecular weight in the range of 15,000 to 4,000,000, and examples of such polyethylene glycol include Polyox WSR-750N (manufactured by Union Carbide Co., trade name).
Are commercially available. If the average molecular weight of this polyethylene ethylene glycol deviates from the above range, the creaminess of the foam and the smoothness of the foam will deteriorate.

In the present invention, the blending amount of the polyethylene glycol is selected in the range of 0.05 to 2% by weight, preferably 0.1 to 1% by weight based on the weight of the composition. This blended amount
If it is less than 0.05% by weight, the creaminess of the foam and the smoothness of the foam may not be sufficient, and if it exceeds 2% by weight, the stability of the liquid tends to be impaired.

The method for preparing the liquid soap composition of the present invention is not particularly limited. For example, an aqueous solution containing the higher fatty acid soap as the component (A), an aqueous solution containing the cationic polymer as the component (B) and a component (C). A method in which an aqueous solution containing polyethylene glycol is added and homogeneously mixed can be used.

In addition to the above-mentioned essential components, the liquid soap composition of the present invention may optionally contain various additive components conventionally used in liquid soap compositions for personal cleansing within a range that does not impair the object of the present invention. It can be blended. As the additive component used as needed, for example, a carbon number of 8 to 22
Higher fatty acids, higher alcohols and their esters and hydrocarbons, lanolin derivatives, lecithin and its derivatives, silicones, glycerin, sorbitol, maltitol, low molecular weight polyethylene glycol, propylene glycol, 1,3-butylene glycol, pyrrolidone Moisturizers such as sodium carboxylate, various surfactants,
Coconut oil fatty acid monoethanolamide, coconut oil fatty acid diethanolamide, or inorganic salts such as sodium chloride, sodium sulfate, magnesium chloride, magnesium sulfate, glycyrrhizin, allantoyl, aloe powder, vitamins and other drugs, extract extracts of animals and plants, Examples include various fragrances and purified water. These additional components may be used alone or in combination of two or more, and may be blended at an appropriate stage of composition preparation.

Action The action according to the present invention is estimated as follows. That is, it is considered that the cationic polymer as the component (B) forms a complex with the higher fatty acid soap as the component (A), and this strengthens the surfactant film at the gas / liquid interface. However, this complex is formed by neutralizing the polar group as it is, and the hydrophilicity is reduced accordingly. That is, although the surfactant film at the air / liquid interface is strengthened by the formation of the complex, the hydration property is reduced by that much as it is, so that the performance such as foaming and foam creaminess is reduced. It is difficult to improve it sufficiently.

In the present invention, by blending a high hydratable high molecular weight polyethylene glycol as the component (C), it is possible to prevent the surfactant film from becoming hydrophobic at the gas / liquid interface,
On the contrary, it is presumed that by improving the hydrophilicity, foaming was enhanced, and by increasing the amount of water contained in the foam, the creaminess of the foam was significantly improved.

Further, by blending the high molecular weight polyethylene glycol as the component (C), the complex adsorbed to the skin after use can be hydrophilized, and as a result, the smoothness of the skin after use can be improved.

Thus, by using a high molecular weight polyethylene glycol with high hydration and a cationic polymer,
It is possible to obtain a more hydrophilic complex with higher fatty acid soap, and it can be presumed that this is the main action leading to the effect of the present invention.

EXAMPLES Next, the present invention will be described in more detail with reference to Examples.
The present invention is not limited in any way by these examples.

 The characteristics of the composition were evaluated as follows.

(1) Foamability CaCl ₂ was used to prepare 20 ml of a 3 wt% sample solution using artificial hard water adjusted to a German hardness of 3 ° DH, and 100 m
Using a test tube with a stopper, the mixture was shaken 20 times for 10 seconds at a temperature of 25 ° C., and 1 minute later, the amount of foam was measured, and the foamability was evaluated according to the following criteria.

◎: Very good foaming, foam volume 70ml or more ○: Good foaming, foam volume 50ml or more, less than 70ml △: Normal foaming, foam volume 30ml or more, less than 50ml ×: Poor foaming, foam volume less than 30ml (2) Usability For each sample According to the following criteria, 7 panelists evaluated sensory and usability, that is, creaminess of foam, persistence of foam, smoothness of foam, and smoothness of skin after use.

◎: Very good, when 6 or more out of 7 answered good ○: Good, when 4 to 5 out of 7 answered good △: Normal, 2 to 3 out of 7 answered good In the case of x: Poor, 0 to 1 out of 7 people answered good. Examples 1 to 7 and Comparative Examples 1 to 7 Liquid soap compositions having the compositions shown in the following table were prepared by a conventional method, and foamability and Usability was evaluated. The results are shown in the table.

As is clear from this table, the liquid soap composition of the present invention is excellent in lathering property, lather creamy property, lather persistence, lather smoothness, and also in terms of the smoothness of the skin after use. It shows excellent performance.

Effect of the Invention The liquid soap composition of the present invention exhibits rich foaming,
The bubbles are fine and homogeneous, have good durability and smoothness, and are excellent in the smoothness of the skin after use. In particular, the composition of the present invention has a fine and creamy foam,
It has excellent features such as a rich satisfaction when used.

Claims (2)

(57) [Claims] (A) 5 to 40% by weight of (A) higher fatty acid soap,
A liquid soap composition comprising (B) 0.01 to 1% by weight of a cationic polymer and (C) 0.05 to 2% by weight of polyethylene glycol having an average molecular weight of 15,000 to 4,000,000 as essential components. 2. The cationic polymer has the general formula (1 and m in the formula are 0 or 1, and their sum is 1
And n is an integer of 100 to 5,000), a polydimethyldiallylammonium chloride type cationic polymer compound represented by the general formula: (1 and m in the formula are 0 or 1, and their sum is 1
And the sum of n ′ and n ″ is an integer of 500 to 10,000) and a copolymer type cationic polymer compound of dimethyldiallylammonium chloride and acrylamide and the general formula (R in the formula is a hydrogen atom, a hydroxyethyl group or p is an integer of 50 to 20,000), The composition according to claim 1, which is at least one selected from the cationized products of hydroxyethyl cellulose.