JPH04169519A - Liquid detergent composition for body - Google Patents

Abstract

PURPOSE:To obtain a liquid detergent composition for bodies, containing a higher fatty acid soap, a specific ether type surfactant and a methacrylic acid- acrylic acid ester copolymer and excellent in foam performance, low-temperature stability, etc. CONSTITUTION:A liquid detergent composition containing (A) preferably 10-25wt.% higher fatty acid soap (e.g. animal or vegetable fats and oils, coconut oil or palm oil), (B) preferably 0.5-3wt.% ether type surfactant prepared by adding 1-10mol ethylene oxide or propylene oxide to 1mol branched type or secondary alcohol (e.g. isostearyl alcohol or lauryl secondary alcohol) and (C) preferably 0.1-2wt.% methacrylic acid-acrylic acid ester copolymer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel liquid body cleansing composition, and more particularly, to a liquid body cleansing composition that has excellent foaming performance, finish feel, and low-temperature stability. It is something.

BACKGROUND OF THE INVENTION Conventionally, synthetic anionic surfactants such as higher fatty acid soaps, sodium σ-olefin sulfonate, and alkyl ether sulfates have been known as cleaning active ingredients used in liquid detergents for body washing. However, these active cleaning ingredients are not always fully satisfactory. For example, higher fatty acid soaps have good creamy foam, good rinsing properties, and a light feeling after use, but they have poor foaming properties and low temperature. Synthetic anionic surfactants, such as sodium σ-olefin sulfonate and alkyl ether sulfate, have good foaming properties and low-temperature stability, but have poor foam creaminess, rinsability, and ease of use. It has the disadvantage of being inferior to the light feeling afterwards.

Therefore, liquid body cleansers rarely use the above-mentioned higher fatty acid soaps or synthetic anionic surfactants alone, and usually contain nonionic surfactants or water-soluble polymer compounds. are used in combination. However, even with compositions made of such combinations, it is currently not possible to obtain a composition that fully satisfies all the characteristics required of a liquid body cleansing agent.

Problems to be Solved by the Invention Under these circumstances, the present invention has been developed to meet the requirements of liquid body cleansers, such as foaming properties during use, creaminess of the foam, ease of rinsing, and a refreshing feeling after use. The purpose of this invention is to provide a liquid body cleansing composition that satisfies all of the above requirements and has good low-temperature stability.

Means for Solving the Problems As a result of intensive research to develop a liquid body cleansing composition having the above-mentioned desirable properties, the present inventors found that a higher fatty acid soap, a specific nonionic surfactant, and methacrylic It has been found that the purpose can be achieved by a composition comprising an acid-acrylic ester copolymer,
Based on this knowledge, we have completed the present invention.

That is, the present invention provides (A) higher fatty acid soap, CB
) per mole of branched alcohol or secondary alcohol,
The present invention provides a liquid body cleansing composition comprising an ether type surfactant to which 1 to 10 moles of ethylene oxide or propylene oxide are added and (C) a methacrylic acid-acrylic acid ester copolymer.

The present invention will be explained in detail below.

In the composition of the present invention, the higher fatty acid soap used as component (A) is not particularly limited, and may be one manufactured by a conventionally known method, such as animal fats and fats such as beef tallow and mutton tallow, coconut oil, and palm oil. , those obtained by saponifying vegetable oils such as palm kernel oil, soybean oil, olive oil, safflower oil, and cottonseed oil with alkali such as sodium hydroxide or potassium hydroxide, or capric acid, lauric acid, and myristic acid. , those obtained by neutralizing higher fatty acids such as palmitic acid, stearic acid, oleic acid, and behenic acid with an alkali such as sodium hydroxide, potassium hydroxide, and triethanolamine are used.

One type of higher fatty acid soap as the component (A) may be used, or two or more types may be used in combination, and the blending amount is usually 5 to 30% by weight based on the total amount of the composition.
It is preferably selected in a range of 10 to 25% by weight. If the amount exceeds the above range, the object of the present invention cannot be fully achieved.

In the composition of the present invention, a nonionic ether type surfactant is used as component (B). This ether type surfactant forms a hydrophilic group by adding 1 to 10 moles of ethylene oxide or propylene oxide to a branched alcohol or secondary alcohol that forms a hydrophobic group. It has a structure that

Examples of the branched alcohol include instearyl alcohol, isocetyl alcohol, octyl alcohol, hexyl decyl alcohol, etc.
Examples of the secondary alcohol include lauryl secondary alcohol, myristyl secondary alcohol, palmityl secondary alcohol, stearyl secondary alcohol, and behenyl secondary alcohol.

This ether type surfactant as component (B) has the effect of improving the low temperature stability of the composition. The reason for this is not necessarily clear, but the following may be considered. In other words, at low temperatures, the liquid crystal structure formed by the higher fatty acid soap of component (A) is in a state where the molecular motion of both hydrophilic and hydrophobic groups has stopped, and slight changes in temperature can cause the molecules to stop moving or restart. It is thought that the liquid crystal structure grows into a strong liquid crystal structure through repeated movements, resulting in solidification.
It is thought that when the ether type surfactant is present, it aligns with the higher fatty acid soap in the liquid crystal structure and loosens the structure, thereby improving low temperature stability.

In the composition of the present invention, one type of ether type surfactant as the component (B) may be used, or two or more types may be used in combination, and the amount to be blended is based on the total amount of the composition. It is usually selected in the range of 0.05 to 5% by weight, preferably 0.5 to 3% by weight. If the amount is less than this, the effect of imparting low-temperature stability will not be sufficiently exhibited, and if it is more than this, there is a tendency for the foaming performance to deteriorate, which is not preferable.

In the composition of the present invention, a methacrylic acid-acrylic acid ester copolymer is used as component (C). Examples of the methacrylic acid-acrylic acid ester copolymer include methacrylic acid-methyl acrylate copolymer, methacrylic acid-ethyl acrylate copolymer, methacrylic acid-propyl acrylate copolymer, and methacrylic acid-acrylic acid copolymer. Butyl copolymer, methacrylic acid-methyl acrylate-ethyl acrylate copolymer, methacrylic acid-methyl acrylate-propyl acrylate copolymer, methacrylic acid-methyl acrylate-butyl acrylate copolymer, methacrylic acid- Ethyl acrylate-propyl acrylate copolymer, methacrylic acid-ethyl acrylate-butyl acrylate copolymer, methacrylic acid-propyl acrylate-butyl acrylate copolymer, methacrylic acid-methyl acrylate-ethyl acrylate- Propyl acrylate copolymer, methacrylic acid-methyl acrylate-ethyl acrylate-butyl acrylate copolymer, methacrylic acid-ethyl acrylate-propyl acrylate-butyl acrylate copolymer, methacrylic acid-methyl acrylate Propyl acrylate-butyl acrylate copolymer, methacrylic acid-methyl acrylate-ethyl acrylate-propyl acrylate-
Examples include butyl acrylate copolymer.

The types of monomers forming these copolymers and the content ratio of monomer units can be appropriately selected in consideration of polymerization stability and the like. This methacrylic acid-acrylic acid ester copolymer as component (C) has the effect of improving the foaming properties of the composition. The reason for this is not necessarily clear, but the following may be considered. That is, since the methacrylic acid-acrylic acid ester copolymer is an anionic water-soluble polymer compound, it does not form a complex with the higher fatty acid soap of component (A) and cause aggregation. It is thought that foaming properties are improved by arranging freely in the structure of the gas/liquid interface film formed by fatty acid soap and strengthening the structure.

In the composition of the present invention, one type of methacrylic acid-acrylic acid ester copolymer as the component (C) may be used, or
Two or more types may be used in combination, and the blending amount is usually selected in the range of 0.05 to 4% by weight, preferably 0.1 to 2% by weight, based on the total amount of the composition. If the amount is less than this, the effect of improving foaming properties will not be sufficiently exhibited, and if it is more than this, the rinsing properties of the foam will deteriorate and the skin will tend to become sticky after use.

There are no particular limitations on the method for preparing the liquid body cleansing composition of the present invention, and it can be prepared in liquid or cream form according to commonly used methods. On this occasion,
Various components can be blended as necessary within a range that does not impair the purpose of the present invention. Components used as necessary include, for example, higher fatty acids having 8 to 22 carbon atoms, higher alcohols and their esters, hydrocarbons, lanolin derivatives, lecithin and its derivatives, silicones, glycerin, sorbitol, maltitol. , low molecular weight polyethylene glycol, propylene glycol,
1. Humectants such as 3-butylene glycol, sodium pyrrolidonecarboxylate, various surfactants, coconut oil fatty acid monoethanolamide, coconut oil fatty acid jetanolamide, or sodium chloride, sodium sulfate, magnesium chloride, magnesium sulfate, etc. Inorganic salts, pH buffering agents such as Grin, sodium bicarbonate, potassium dihydrogen phosphate, drugs such as glycyrrhizin, allantoin, aloe powder, vitamins, animal and plant extracts,
Examples include various fragrances and purified water. These additive components may be used alone or in combination of two or more, or may be blended at an appropriate stage of composition preparation.

Effects of the Invention The liquid body cleansing composition of the present invention is a composition containing a higher fatty acid soap, a specific ether type surfactant, and a methacrylic acid-acrylic acid ester copolymer, and has excellent foaming properties during use. It has excellent creaminess of the foam, ease of rinsing, and refreshing feeling after use, as well as good low-temperature stability, making it extremely valuable as a product.

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

The properties of the composition were evaluated as follows.

(1) Foaming properties, creaminess of the foam, rinsability, and refreshing feeling after use For each sample, 20 panelists sensually evaluated the foaming properties, creaminess of the foam, rinsability, and refreshing feeling after use. Evaluation was made according to the following criteria.

◎: Very good If the top 6 to 20 out of 20 answered that it was good ○: Good If the top 1 to 15 out of 20 answered that it was good △: Average If the top 10 out of 20 answered that it was good If the answer is ×: Poor If the top 5 out of 20 people answered that it is good (2) Low temperature stability - Store in a 24 hour cycle between 5°C and 30°C until low temperature solidification occurs. The number of days required was evaluated according to the following criteria.

◎: Very good If stable for more than 1 year: O: Good
If solidification occurs in 3 months or more and less than 1 year △: Normal If solidification occurs after 2 weeks or more and 3 months without grooves ×: Poor If solidification occurs in less than 2 weeks Examples 1 to 6, Comparative Example 1 ~6 Liquid body cleansing compositions having the compositions shown in the following table were prepared according to conventional methods and evaluated for foaming properties, foam creaminess, rinsability, refreshing feeling after use, and low-temperature stability. The results are shown in the table below.

As is clear from this table, the liquid body cleansing composition of the present invention exhibits excellent performance in all evaluation items.

Claims (1)

[Claims] 1 (A) Higher fatty acid soap, (B) ether type surfactant with 1 to 10 moles of ethylene oxide or propylene oxide added to 1 mole of branched alcohol or secondary alcohol, and (C) methacrylic acid-acrylic acid ester A liquid body cleansing composition comprising a copolymer.