JPH09183996A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent compsn. which exhibits good foaming properties, detergency, and foam qualities during cleaning and is excellent in the feeling of refreshment after rinsing by imcoporating a potassium salt of a higher fatty acid, an alkyldimethylaminoacetic acid betaine, and a high-polymn.-degree polyethylene glycol into the same. SOLUTION: This compsn. contains 5-30wt.% potassium salt of a higher fatty acid, 2-20wt.% alkyldimethylaminoacetic acid betaine, and 0.0005-1wt.% high-polymn.-degree polyethylene glycol. The synergistic action of the potassium salt and the betaine provides a thickening effect, giving a stable liq. with a suitably high viscosity even without using a gelatinizing agent. The synergistic action also improves the detergency of the compsn. and enables the inhibition of occurrence of soap scum.

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, it has good stability and usability, good foamability, detergency and foam quality, and has a refreshing feeling after washing. ,
The present invention relates to a cleansing composition for skin that does not cause the skin to become taut.

[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, liquid skin cleaners, especially as a main component of body cleaners, potassium salts of higher fatty acids have foaming properties, detergency,
Excellent in solubility in water system, refreshing feeling after washing,
It has been used as a detergent component that forms the basis of formulations.

[0003]

However, a detergent containing a potassium salt of a higher fatty acid as a main component has excellent properties in terms of foaming properties, detergency, solubility in an aqueous system, and a refreshing feeling after rinsing. On the other hand, it has disadvantages such as the generation of so-called soap scum during washing, the inability to obtain a creamy foam, and the swelling of the skin after use due to excessive degreasing during washing. In order to ensure the stability and usability (ease of use) of the product, it is necessary to increase the viscosity of the system to an appropriate level. However, the aqueous solution of a potassium salt of a higher fatty acid alone keeps the viscosity stably high. Is difficult, and gelation and crystal precipitation at a low temperature are likely to occur.

[0004] As a method for solving the above-mentioned problems of a detergent containing a potassium salt of a higher fatty acid as a main component, there have hitherto been used acylalkyltaurine salts, acylisethionate salts, phosphate ester salts, acylamino acids. A combination with a salt-based surfactant or the like has been studied, and an application has been filed. (Japanese Unexamined Patent Publication (Kokai) No. 6-248298) The addition of a gelling agent such as fatty acid alkylolamide or various water-soluble polymers has been studied in order to obtain a suitable viscosity. However, these methods have not been able to finally provide excellent quality as a liquid skin cleanser, such as insufficient improvement of defects and unfavorable feeling during use. Accordingly, development of a more improved liquid skin cleanser in these respects has been desired.

[0005]

Under these circumstances, the inventors of the present invention have conducted diligent research to overcome the above-mentioned drawbacks, and as a result, each of potassium salts of higher fatty acids, specific amphoteric surfactants and highly polymerized polyethylene glycols has been investigated. By combining a specific amount, without deteriorating the advantages of higher fatty acid potassium salt-based detergents such as foamability during washing, detergency, and a refreshing feeling after washing, eliminating soap dregs during washing,
To obtain a creamy foam quality, yet to give the skin a tight feeling, and to increase the viscosity of the system moderately without using a gelling agent to obtain good stability and usability. They have been found, and the present invention has been completed based on these findings.

That is, the present invention provides the following components (A) to
(C), (A) 5-30% by weight of potassium salt of higher fatty acid (B) Betaine alkyldimethylaminoacetate 2-20
% By weight (C) Highly polymerized polyethylene glycol 0.0005-
A cleaning composition comprising 1% by weight.

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.

In particular, the present inventors have found that in the present invention, the interaction between the potassium salt of the higher fatty acid as the component (A) and the below-mentioned component (B) alkyldimethylaminoacetate betaine exhibits a thickening effect. Was. As a result, a stable, moderately high-viscosity liquid material can be obtained without using a gelling agent. However, even the salts of the same higher fatty acids do not show this tendency to thicken with sodium salts, triethanolamine salts and the like.

The source 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 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 the 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 as 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 and may not be suitable in terms of quality as a liquid cleaning agent.

Alkyldimethylaminoacetic acid betaine which is the component (B) used in the present invention is an amphoteric quaternary ammonium salt which is widely used in detergents and hair products, and has good detergency. On the other hand, the foamability is not so strong. In the present invention, as described above, a thickening effect can be obtained by the combined use with the potassium salt of the higher fatty acid as the component (A), and it is effective in improving detergency and suppressing soap scum during cleaning. . The source of the alkyldimethylaminoacetic acid betaine as the component (B) in the present invention is not particularly limited, and those produced by a conventionally known method can be used. The alkyl group is not particularly limited, and examples thereof include alkyl groups such as coconut oil alkyl groups, palm kernel oil alkyl groups, lauryl groups, and myristyl groups. Of these, coconut oil alkyl groups, lauryl groups, and palm kernel oil alkyl groups are preferred. Alkyldimethylaminoacetic acid betaine is commercially available as Ricabion A-100 (manufactured by Shin Nihon Rika), Anone BF (manufactured by NOF CORPORATION), or the like.

In the present invention, the amount of the component (B), alkyldimethylaminoacetic acid betaine, is 2 to 20 in the total composition.
%, And preferably 5 to 15%.
If it is less than 2% or more than 20%, a sufficient and appropriate thickening effect cannot be obtained, and good usability cannot be obtained. Also,
In particular, if it is less than 2%, the effect of suppressing soap residue and the improvement of detergency are not sufficient.

In the present invention, in order to effectively use the thickening effect of the potassium salt of the higher fatty acid (A) and the betaine alkyldimethylaminoacetate (B),
The blending weight ratio (A) / (B) is preferably in the range of 5/1 to 1/1, and in this range, high viscosity suitable for the product system can be obtained.

The highly polymerized polyethylene glycol of the component (C) used in the present invention is effective in improving the foam quality during skin washing and suppressing the tightness of the after skin, but in order to bring out such an effect. Has an average molecular weight of 100,000 to 100
Those in the range of 0,000 are preferable, and those in the range of 400,000 to 7 million are particularly preferable. Highly polymerized polyethylene glycol is commercially available as Polyox WSR series (manufactured by Union Carbide Co.).

In the present invention, the amount of the highly polymerized polyethylene glycol as the component (C) is 0.0005 in the total composition.
˜1%, preferably 0.005 to 0.1%. If it is less than 0.0005%, good foam quality such as creamy feeling of the foam cannot be obtained, while if it exceeds 1%, slimy feeling is left during rinsing and no refreshing feeling of the skin is obtained.

The detergent composition of the present invention contains, in addition to the above essential components, higher fatty acids or salts thereof other than those mentioned above in a quantitative and qualitative range depending on the purpose without impairing the effects of the present invention.
Surfactants such as fatty acid alkylolamides and polyalkylene glycol fatty acid esters; pearl agents such as alkylene glycol fatty acid esters; viscosity or feel modifiers such as water-soluble polymers and water-soluble polysaccharides; aqueous components such as polyhydric alcohols; Oily ingredients such as lanolin, hydrocarbons, fats and oils, silicone oils, UV absorbers, chelating agents, dyes, preservatives, pH adjusting agents, antioxidants, powders, fragrances and other ingredients commonly used in detergents Can be blended.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the detergent composition of the present invention, the potassium salt of higher fatty acid, betaine alkyldimethylaminoacetate, and highly polymerized polyethylene glycol, which are the above-mentioned essential components, are heat-mixed with each other in certain amounts and cooled in some cases. By carrying out a treatment and appropriately blending the above-mentioned optional components, a skin cleansing agent for body, hand, face wash, etc. can be produced. Further, the cleaning composition of the present invention, by combination with other components and the mechanism of the container, low-viscosity liquid having high viscosity, emulsion, cream, gel, etc.
It can be implemented in various forms.

[0019]

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 13 and Comparative Examples 1 to 11
Liquid Body Soap A liquid body soap was prepared by the composition shown in Tables 1 and 2 and the following production method, and the foaming property, detergency, and
The refreshing feeling after washing off, the degree of soap residue during cleaning, the refreshing feeling of the after skin, the good foam quality (creamy feeling), and the thickening effect were evaluated. The results are shown in Tables 1 and 2.

[0021]

[Table 1]

[0022]

[Table 2]

(Note 1) Polyox WSR-N-10
(Average molecular weight 100,000) (manufactured by Union Carbide) (Note 2) Polyox WSR-N-60K (average molecular weight 2 million) (manufactured by Union Carbide) (Note 3) Polyox WSR303 (average molecular weight 700)
10,000) (Made by Union Carbide)

(Production Method) A. Components (1) to (6), (15) and (16) are heated and dissolved. B. Components (7) to (9) and (19) are added to A to react with each other, and then cooled. C. Ingredients (10) to (14) are mixed with B. D. Ingredients (17) and (18) are added to C and mixed. E. FIG. D is filled into a container to obtain a liquid body soap.

(Evaluation Method) <1> Foamability With respect to the liquid body soaps of Examples 1 to 13 and Comparative Examples 1 to 11, 0.5% diluted solutions of respective samples were prepared,
The test was carried out by the loss miles test method, and the evaluation was carried out in four stages according to (a) foaming property evaluation criteria. (A) Foaming evaluation criteria Foam amount 220 ml or more: ◎ (Very good) Foam amount 200 ml or more and less than 220 ml: ○ (Good) Foam amount 150 ml or more and less than 200 ml: △ (Normal) Foam amount less than 150 ml: × (Poor)

<2> Detergency: A fixed amount (1.0 g) of olive oil is attached to a cotton cloth of 5 cm × 5 cm, and the dried cloth is used as a contaminated cloth. Example 1
The contaminated cloth was put into the 1% diluted solution of each sample of Comparative Examples 1 to 13 and Comparative Examples 1 to 11 and 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 calculated from the measured value and the formula (1), and the cleaning power was evaluated in four levels according to the cleaning power evaluation standard (b).

[0027]

[Equation 1]

(B) Detergency Evaluation Criteria Removal rate 60% or more: ◎ (Very good) Removal rate 50% or more, less than 60%: ○ (Good) Removal rate 40% or more, less than 50%: △ (Normal) Removal rate less than 40%: × (defective)

<3> Refreshing feeling after washing off <4> Degree of soap residue during washing <5> No refreshing feeling on the skin <6> Good foam quality (creamy feeling) Example for 10 professional evaluation panels 1 to 13 and Comparative Example 1
Distributing each sample of ~ 11 to use, refreshing feeling after washing, the degree of soap residue during washing,
Also, each evaluation item of the lack of tightness of the skin and the goodness of foam quality (creamy feeling) was evaluated by 5 grades using the following (c) absolute evaluation criteria. After that, the average value of the scores of each sample was evaluated using (4) four-level evaluation criteria. (C) Absolute Evaluation Criteria (Score) (Rating) <3><5><6> / <4> 4: Very good / Not seen at all 3: Good / Almost not seen 2: Normal / Slightly seen Appeared 1: Slightly bad / Seen 0: Poor / Seen a lot (D) Four-step evaluation standard (Score): (Evaluation) 3.0 or more: ◎ (Very good) 2.0 or more, less than 3.0: Good (good) 1.0 or more and less than 2.0: Fair (somewhat bad) Less than 1.0: Poor (bad)

<7> Thickening effect With respect to each of the samples of Examples 1 to 13 and Comparative Examples 1 to 11, the viscosity at 25 ° C was measured by a Brookfield type rotational viscometer, and the viscosity was increased according to the (e) viscosity evaluation standard. Effect 3
It was rated on a scale. (E) Viscosity evaluation standard 1000 cps or more and less than 4000 cps: ⊚ (good) 4000 cps or more and less than 10000 cps, or 100 cps or more and less than 1000 cps: ○ (normal) 10000 cps or more or less than 100 cps: × (bad)

As is clear from the results shown in Tables 1 and 2, the liquid body soap of the present invention showed good results in foamability, detergency, creamy foam quality, and a refreshing feeling after washing, and I couldn't see any soap residue. Further, it was proved that it has good stability and usability due to its moderate viscosity, does not give a feeling of tightness on the skin, and exhibits excellent effects gentle on the skin. On the other hand, in Comparative Examples 1 to 11, none satisfying all items was obtained.

Example 14 Liquid Soap A liquid soap was prepared by the composition and production method shown below. (Composition) (Component) (% by weight) (1) Palm kernel oil fatty acid potassium 15.5 (2) Palm oil alkyl dimethylamino acetic acid betaine (30%) 18 (3) Highly polymerized polyethylene glycol (Note 2) 0. 01 (4) Coconut oil fatty acid diethanolamide 2 (5) Propylene glycol 3 (6) Perfume proper amount (7) Microbicide proper amount (8) Purified water residual amount

(Production method) A. The components (1) to (5) and (8) are uniformly heated and dissolved, and then cooled. B. Ingredients (6) and (7) are added to A and mixed uniformly. C. Fill the container with B to obtain a liquid soap.

The liquid soap of Example 14 obtained as described above has an excellent effect as a cleaning agent having a viscosity that is easy to use, has a good foaming and has a creamy feel, and gives a refreshing hand skin after washing. Was shown.

[0035]

As described in detail above, the detergent composition of the present invention can obtain an appropriate viscosity without using a gelling agent, and can obtain good stability and usability. In addition, it has a good foaming property, detergency and foam quality during use, does not generate soap residue, and has an excellent effect that does not give a tight feeling to the skin while having a fresh feeling after washing. And has excellent quality as a cleansing composition for skin.

Claims (1)

[Claims] 1. The following components (A) to (C): (A) 5 to 30% by weight of a potassium salt of a higher fatty acid (B) alkylene amino betaine 2 to 20
% By weight (C) Highly polymerized polyethylene glycol 0.0005-
A cleaning composition comprising 1% by weight.