JPH10310790A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition giving good stability and usability without using a large amount of a gelling agent and without excessively enhancing the viscosity of the system by compounding a higher fatty acid potassium salt, a surfactant and menthol in specific amounts, respectively. SOLUTION: This detergent composition comprises (A) 5-30 wt.% of a higher fatty acid potassium salt, (B) 0.5-15 wt.% of one or more kinds of surfactants selected from amphoteric surfactants and/or nonionic surfactants, preferably acetic acid betaine type amphoteric surfactants, imidazoline type amphoteric surfactants, and alkylolamide type nonionic surfactants, and (C) 0.05-5 wt.% of menthol. The component A and the component B are preferably compounded in an A/B weight ratio of 20/1 to 2/1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition, and more particularly, to a detergent composition having an appropriate viscosity and good usability.
The present invention relates to a cleansing composition for skin having good foaming properties, detergency, and foam quality, and having a refreshing feeling on washed skin.

[0002]

2. Description of the Related Art Conventionally, detergents satisfy the required quality by selecting various surfactants in consideration of foaming properties and detergency, or by combining them in accordance with the purpose and use of the detergent. Things have been done. Among them, potassium salt of higher fatty acid is the main component of skin cleanser, especially body cleanser, which is excellent in foaming property, detergency, solubility in aqueous system, refreshing feeling after washing, etc., and forms the framework of the formulation It has been used as a detergent component.

[0003]

Generally, in a cleaning agent, the viscosity of the system is appropriately increased in order to prevent separation of the system over time and to make the composition easy to pick up and hard to spill. It is necessary to ensure product stability and usability (ease of use). However, a detergent containing a potassium salt of a higher fatty acid as a main component has excellent properties such as foaming properties, detergency, solubility in an aqueous system, and a refreshing feeling after washing, but an aqueous solution of a potassium salt of a higher fatty acid. It is difficult to keep the viscosity stable and high only by the above method, and further, gelation and crystal precipitation at a low temperature are liable to occur. For this purpose, combinations with amphoteric surfactants and nonionic surfactants and addition of gelling agents such as various water-soluble polymers have been studied. Excellent quality as a detergent has not yet been obtained, for example, sliminess remains or the refreshing feeling is impaired. Therefore, development of a more improved skin cleansing composition in these respects has been desired.

[0004]

Under such circumstances, the present inventor has conducted intensive studies to overcome the above-mentioned drawbacks.
By combining one or more of a potassium salt of a higher fatty acid, an amphoteric surfactant and / or a nonionic surfactant, and a specific amount of each of menthol, the viscosity of the system can be reduced without using a large amount of a gelling agent. Can be moderately high, resulting in good foaming, detergency, foam quality during washing, and good stability without impairing the advantages of higher fatty acid potassium salt-based detergents, such as cleansing feeling of the washed skin The inventors have found that properties and usability can be obtained, and completed the present invention based on these findings.

That is, the present invention provides the following components (A) to
(C), (A) potassium salt of higher fatty acid 5 to 30% by weight (B) amphoteric surfactant and / or nonionic surfactant 0.5 to 15% by weight (C) menthol 0.05 to 5% by weight It is a cleaning composition characterized by containing.

Hereinafter, the present invention will be described in detail. The potassium salt of a higher fatty acid as the component (A) used in the present invention is a general-purpose anionic surfactant in a detergent. Potassium salt of higher fatty acid has good solubility in water system among higher fatty acid salts which are hardly soluble in water, has excellent foaming property, detergency and gives a refreshing feeling after rinsing, but is weak to hard water on the other hand Disadvantages such as poor low-temperature stability. In the present invention, high foaming properties and detergency, essential as a skeletal component of the formulation for imparting a refreshing feeling after rinsing, combined with other essential components, the disadvantages of the potassium salt of this higher fatty acid are improved. You.

Particularly, in the present invention, in the combined use system of the potassium salt of the higher fatty acid of the component (A) and the amphoteric surfactant and / or the nonionic surfactant of the component (B) described later, the menthol of the component (C) is used. The present inventor has found that a thickening effect can be obtained by adding. As a result,
By adding menthol as the component (C), a liquid material having stable and appropriate viscosity can be obtained even if the amount of the amphoteric surfactant, nonionic surfactant or other gelling agent is reduced. It is possible to suppress the sliminess of the skin at the time of use derived from these components, and to obtain a refreshing feeling after washing. On the other hand, sodium salt,
Triethanolamine salts do not show this tendency to thicken.

[0008] The origin of the potassium salt of the higher fatty acid of the component (A) in the present invention is not particularly limited, and is produced by a conventionally known method. For example, animal fats and oils such as beef tallow, coconut oil, and palm oil Vegetable oils such as oil, palm kernel oil, olive oil, safflower oil, soybean oil, cottonseed oil, or higher fatty acids such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, behenic acid, etc. Examples include those obtained by saponifying or neutralizing at least one selected from the above with potassium hydroxide. Among the potassium salts of higher fatty acids thus obtained, potassium salts of coconut oil fatty acids,
Particularly preferred are potassium salts of palm kernel oil fatty acids, potassium salts of lauric acid, potassium salts of myristic acid, and potassium salts of palmitic acid.

The potassium salt of a higher fatty acid as the component (A) is not only compounded as potassium higher fatty acid in the formulation, but also separately mixed with a higher fatty acid and an alkali agent such as potassium hydroxide. It can also be produced by a reaction in the production process of the agent composition. In the present invention, the potassium salt of a higher fatty acid produced by this method is also included in the component (A).

In the present invention, the compounding amount of the potassium salt of the higher fatty acid of the component (A) is 5 to 30% by weight (hereinafter, unless otherwise specified, the weight% is simply indicated by%) in the whole composition. Range, preferably 10-20%. If it is less than 5%, sufficient foaming properties and detergency cannot be obtained, and if it exceeds 30%, it does not exhibit a liquid state, so that good quality cannot be obtained substantially as a liquid detergent.

The amphoteric surfactant and nonionic surfactant which are the component (B) used in the present invention are general-purpose surfactants for detergents and hair products. In the present invention,
The amphoteric surfactant and the nonionic surfactant of the component (B) not only improve the detergency, but also stably increase the viscosity with only a single aqueous solution which is a disadvantage of the potassium salt of the higher fatty acid of the component (A). It is possible to improve the point that it is difficult to maintain, the point that gelation and crystal precipitation are likely to occur at a low temperature, and the point is unstable. However, on the other hand, if the blending amount is large, sufficient quality as a skin cleanser cannot be obtained, for example, the skin becomes wet when used, and a refreshing feeling cannot be obtained.

In the present invention, the amphoteric surfactant or nonionic surfactant which is the component (B) is not particularly limited as long as it is an amphoteric surfactant or nonionic surfactant usually used for a detergent. As the amphoteric surfactant, a betaine acetate-type amphoteric surfactant or an imidazoline-type amphoteric surfactant is preferable. In a specific example, as the betaine acetate surfactant, octyl dimethyl amino betaine, lauryl dimethyl amino betaine, coconut fatty acid alkyl dimethyl amino acetate betaine, myristyl dimethyl amino acetate betaine, cetyl dimethyl amino acetate betaine, coconut fatty acid Amidopropyldimethylaminoacetic acid betaine, amidopropyldimethylaminoacetic acid betaine laurate, betaine lauryldihydroxyethylaminoacetate, betaine cetyldihydroxyethylaminoacetate, and the like, and the imidazoline surfactants include N-coconut fatty acid acyl- N-carboxymethyl-N-hydroxyethylethylenediamine sodium,
N-coconut fatty acid acyl-N-carboxymethoxyethyl-N-carboxymethylethylenediamine disodium and the like. Among these, lauryl dimethylamino acetate betaine, coconut oil fatty acid alkyldimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyldimethylaminoacetic acid betaine, lauric acid amidopropyldimethylaminoacetic acid betaine, N-coconut oil fatty acid acyl-N-
Carboxymethoxyethyl-N-carboxymethylethylenediamine disodium is particularly preferred.

The nonionic surfactant among the component (B) is preferably an alkylolamide type nonionic surfactant. Specific examples include capric acid monoethanolamide, lauric acid monoethanolamide, coconut oil fatty acid monoethanolamide, capric acid diethanolamide, lauric acid diethanolamide, coconut oil fatty acid diethanolamide, capric acid isopropanolamide, lauric acid isopropanolamide And coconut oil fatty acid isopropanolamide. Of these, lauric acid monoethanolamide, coconut oil fatty acid monoethanolamide, lauric acid diethanolamide,
Coconut oil fatty acid diethanolamide is particularly preferred.

In the present invention, the amphoteric surfactant and / or the nonionic surfactant of the component (B) can be used alone or in combination of two or more if necessary. 0.5 to 15%, more preferably 2
〜１０10%. If it is less than 0.5%, a sufficient cleaning effect and moderately high viscosity cannot be obtained, and if it exceeds 15%, the skin may be slimy at the time of use, or a refreshing feeling may not be sufficiently obtained. It is difficult to obtain good quality as a detergent, for example, the stability of the system is reduced.

The menthol component (C) used in the present invention is usually used in hair cosmetics and skin cosmetics for the purpose of imparting a refreshing feeling to the scalp and skin.
In the present invention, as described above, the menthol of the component (C) is mixed with a combination system of the higher fatty acid potassium salt of the component (A) and the amphoteric surfactant and / or the nonionic surfactant of the component (B). , A thickening effect is obtained, and as a result, the amount of the component (B) can be reduced. For this reason, the superior foaming property which is an advantage of the higher fatty acid potassium salt of the component (A), the detergency and the refreshing feeling after rinsing, and the appropriate viscosity which is the effect of the component (B) are stabilized and low temperature. A cleansing agent for skin having excellent quality can be obtained without impairing stability improvement.

Examples of the menthol (C) used in the present invention include l-menthol and dl-menthol, but in the present invention, l-menthol is preferred. In the present invention, the blending amount of the menthol of the component (C) is 0.05 to 5%, more preferably 0.2 to 1% in the whole composition. If it is less than 0.05%, a sufficient thickening effect cannot be obtained, and if it exceeds 5%, it cannot be completely dissolved and becomes non-uniform, so that it is difficult to obtain good quality as a detergent.

As the component (C), an essential oil containing menthol or a compounded flavor may be used. For example, an essential oil such as peppermint oil (light oil) may be used. In this case, the blending amount of the essential oil, the compounded flavor and the like is blended so that the menthol content contained therein falls within the range of the blending amount of the component (C).

In the present invention, the component (A) and the component (B)
In order to obtain good foaming properties, detergency and a refreshing feeling after rinsing, the components have a weight ratio (A) / (B) of 20/1 to 2
When the ratio is in the range of / 1, the effect is remarkable, and the effect of increasing the viscosity of the component (C) is sufficiently exerted.

The appropriate viscosity for improving the usability of the detergent composition of the present invention means a viscosity suitable for taking out a fixed amount from a container and using it.
This corresponds to a viscosity in the range of 250 to 100,000 cps (Brookfield viscometer) at 0 ° C. The viscosity is particularly preferably from 1,000 to 20,000 cps. 250 ~
If it is in the range of 100,000 cps, it is easy to pick up and hard to spill, which is preferable in terms of usability.

The detergent composition of the present invention comprises, in addition to the above essential components, a surfactant other than the above essential components in a quantitative and qualitative range that does not impair the effects of the present invention depending on the purpose; , Water-soluble polysaccharides and other viscosity or feel improvers; alkylene glycol fatty acid esters and other pearlescent agents; polyhydric alcohols and other aqueous components; lanolin, hydrocarbons, oils and fats, silicone oils and other oily components; powders; UV absorbers; antioxidants; preservatives; bactericides; chelating agents; pH adjusters; electrolytes; coloring agents; fragrances;

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The cleaning composition of the present invention is prepared by stirring and mixing a potassium salt of a higher fatty acid, which is an essential component, and an amphoteric surfactant and / or a nonionic surfactant, and menthol in specific amounts. In some cases, heating and cooling treatments are performed, and the above-mentioned optional components are appropriately blended as necessary, whereby the composition can be produced as a skin-cleaning agent for body, hand, face-wash and the like. Further, the cleaning composition of the present invention can be carried out in various forms, such as a low-viscosity liquid, an emulsion, a cream, and a gel, depending on the combination with other components and the mechanism of the container. it can.

[0022]

The present invention will be described in more detail with reference to the following examples. These do not limit the present invention at all.

Examples 1 to 8 and Comparative Examples 1 to 6 Body soap A body soap was prepared by the composition shown in Tables 1 and 2 and by the following production method, and the usability at the time of use was determined by the following test method.
Foaming properties, detergency, and freshness after rinsing were determined. The results are shown in Tables 1 and 2.

[0024]

[Table 1]

[0025]

[Table 2]

(Production method) A. Mix components (1)-(5), (10) and (11). B. Components (6) to (9) are mixed and dissolved. C. B is added to A, mixed and filled into a container to obtain a body soap.

(Evaluation Method) <1> Foaming Property For the body soaps of Examples 1 to 8 and Comparative Examples 1 to 6, a 0.5% diluted solution of each sample was prepared and tested by the Ross Miles test method. Was carried out, and (a) the evaluation was made in four steps according to the foaming property evaluation standard. (A) Foaming property determination criteria Foam amount 220 ml or more: Foam amount 200 ml or more and less than 220 ml: ○ Foam amount 150 ml or more and less than 200 ml: △ Foam amount less than 150 ml: ×

<2> Detergency A certain amount (1.0 g) of olive oil is adhered to a cotton cloth of 5 cm × 5 cm, and dried is used as a contaminated cloth. Example 1
The contaminated cloth was placed in a 1% diluted solution of each sample of Comparative Examples 1 to 8 and Comparative Examples 1 to 6, shaken at 30 ° C for 30 minutes, and then the amount of olive-derived triglyceride in the detergent solution was measured. The removal rate was determined from the measured value and the formula (1), and the detergency was determined in four stages according to the detergency criteria (b).

[0029]

(Equation 1)

(B) Detergency Evaluation Criteria Removal rate 60% or more: Removal rate 50% or more, less than 60%: ○ Removal rate 40% or more, less than 50%: Δ Removal rate less than 40%: ×

<3> Usability at the time of use (ease of use due to moderate viscosity) <4> Refreshing feeling after rinsing Examples 1 to 8 and Comparative Examples 1 to 10 expert evaluation panels
Each sample of No. 6 was distributed and used, and each sample was evaluated for ease of use due to appropriate viscosity and refreshing feeling after rinsing using the following five-point evaluation criteria (c). Thereafter, the average value of the scores of each sample was determined using (d) a four-step criterion. (C) Five-level evaluation criteria (Score) (Evaluation) 4: Very good 3: Good 2: Normal 1: Slightly bad 0: Poor (d) Four-level criteria (Score): (Judgment) 3.0 or more : ◎ 2.0 or more and less than 3.0: 1.0 or more and less than 2.0: Δ less than 1.0: ×

As is clear from the results shown in Tables 1 and 2, the liquid body soap of the present invention shows good results in terms of foaming properties, detergency, and refreshing feeling after rinsing. It proved to be good. On the other hand, Comparative Examples 1 to 6 did not satisfy any of the items.

Example 9 Liquid soap A liquid soap was prepared according to the following composition and production method. (Composition) (Component) (% by weight) (1) Lauric acid 10 (2) Myristic acid 3 (3) Palmitic acid 4 (4) Coconut oil fatty acid amidopropyl dimethyl amino betaine (30%) 10 (5) Water Potassium oxide 4 (6) l-menthol 0.7 (7) Perfume proper amount (8) Preservative proper amount (9) Purified water balance

(Production method) A. The components (1) to (4) are mixed by heating. B. The components (5) and (9) are added to A and reacted, and then cooled. C. B is added with (6) to (8) and mixed. D. Fill the container with C to obtain a liquid soap.

The liquid soap of Example 9 obtained as described above is easy to use by hand, has a good foaming effect, has a creamy feel, and has an excellent effect as a liquid soap having a clean hand skin after washing. It was shown.

[0036]

As described in detail above, the detergent composition of the present invention can moderately increase the viscosity of the system by using menthol and impair the advantages of the higher fatty acid potassium salt-based detergent. And good stability and usability can be obtained. That is, the cleaning composition of the present invention has good foaming properties, detergency and foam quality during use, and has an excellent effect of giving a refreshed feeling to the washed skin, and is used for skin cleaning. It has excellent quality as an agent composition.

Claims (3)

[Claims] 1. The following components (A) to (C): (A) 5 to 30% by weight of a potassium salt of a higher fatty acid; (B) 0.5 to 15% by weight of an amphoteric surfactant and / or a nonionic surfactant. % (C) Menthol 0.05 to 5% by weight. 2. The composition according to claim 1, wherein the component (B) is at least one selected from betaine acetate-type amphoteric surfactants, imidazoline-type amphoteric surfactants, and alkylolamide-type nonionic surfactants. Cleaning composition. 3. The cleaning composition according to claim 1, wherein the compounding weight ratio (A) / (B) of the component (A) and the component (B) is 20/1 to 2/1.