JP2000087093A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent compsn. which is highly safe for the skin and can retain a suitable viscosity for a long term by incorporating at least one anionic surfactant of a long-chain acyl-lower-alkyltaurine salt type and at least one N-alkylpyrrolidone into the same. SOLUTION: This compsn. contains 5-50 wt.% at least one anionic surfactant of a long-chain acyl-lower-alkyltaurine salt type represented by formula I (e.g. sodium N-coconut oil fatty acid-N-methyltaurine) and 3-7 wt.% at least one N-alkylpyrrolidone represented by formula II (e.g. N-octylpyrrolidone) and exhibits a viscosity of 300-5,000 mPa.s at 30 deg.C, a viscosity change ratio of 0.8-1 after the storage at 45 deg.C for 28 days, a pH of 5-7 just after the production, and a change in pH lower than 0.2 after the storage at 45 deg.C for 2 months. In the formulas, R1CO is an 8-20C fatty acid residue; R2 is H or a 1-3C alkyl; M1 is an alkali or alkaline earth metal, ammonium, or an org. amine; and R3 is an 8-16C alkyl.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cleaning composition. More specifically, for cleaning human skin, hair, etc., which has high safety to the skin and has an appropriate viscosity for use, the viscosity is maintained stably for a long time, and the pH is excellent in the long-term stability. The present invention relates to a cleaning composition.

[0002]

2. Description of the Related Art Conventionally, long-chain acyl-lower alkyl taurine salt type anionic surfactants are known as cleansing ingredients having high safety to the skin. It was difficult to obtain a suitable viscosity for use.
In order to solve this, viscosity was obtained by using fatty acid alkylolamide (a nonionic surfactant) or a very high molecular weight cationic cellulose ether in combination.

[0003] However, fatty acid alkylolamide has a high protein-degrading ability, so that it is not preferable to mix it in a large amount in a detergent from the viewpoint of safety. Furthermore, it is not preferable in terms of long-term storage stability, for example, the pH of the product increases as the time elapses after production and changes to the alkaline side. In addition, from the viewpoint of feeling of use, when a large amount is blended, there is a problem that hair and skin are rough and lack freshness. In addition, the high molecular weight cationic cellulose ether has a disadvantage that the viscosity decreases with the elapse of a long time.

Under such circumstances, when a long-chain acyl lower alkyl taurine salt type anionic surfactant is used as a main cleaning component, it is possible to continuously maintain a moderate viscosity which is satisfactory in use. And p
There has been a demand for the development of a detergent composition that does not show a change in H.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and has a high degree of safety to the skin, has an appropriate viscosity for use, maintains the viscosity stably for a long period of time, and has a high pH. An object of the present invention is to provide a detergent composition for cleaning human skin, hair, and the like, which is excellent in long-term stability.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies in view of the above circumstances, and as a result, have found that a long-chain acyl lower alkyl taurine salt type anionic surfactant is combined with an N-alkylpyrrolidone. The inventors have found that the above object can be achieved, and based on this, completed the present invention.

That is, the present invention relates to (A) the following general formula (I)

[0008]

Embedded image (Wherein R ¹ CO represents a saturated or unsaturated fatty acid residue (acyl group) having an average of 8 to 20 carbon atoms; R ² represents a hydrogen atom or an alkyl group having an average of 1 to 3 carbon atoms;
M ¹ represents an alkali metal, an alkaline earth metal, ammonium or an organic amine) and one or more of long-chain acyl-lower-alkyl-taurine-type anionic surfactants represented by (B) 1) N-alkylpyrrolidone
The present invention relates to a detergent composition comprising a seed or two or more kinds.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The long chain acyl lower alkyl taurine salt type anionic surfactant used as the component (A) in the present invention is represented by the following general formula (I):

[0011]

Embedded image (Wherein R ¹ CO represents a saturated or unsaturated fatty acid residue (acyl group) having an average of 8 to 20 carbon atoms; R ² represents a hydrogen atom or an alkyl group having an average of 1 to 3 carbon atoms;
M ¹ represents an alkali metal, an alkaline earth metal, ammonium or an organic amine).

In the above formula, R ¹ CO is, for example, C _{11
H 23 CO, C 13 H 27} CO, C 15 H 31 CO, C 17 H 35 C
O, C ₁₃ H ₂₅ CO, C ₁₅ H ₂₉ CO, coconut oil fatty acid residue, palm coconut oil fatty acid residue and the like. Note that R
¹ CO is foaming, from the viewpoint of safety, the average number of carbon atoms is more preferably from 10 to 16. R ² includes H, CH ₃ , C ₂ H ₅ or C ₃ H ₇ . Examples of M ¹ include lithium, potassium, sodium, calcium, magnesium, ammonium, monoethanolamine, diethanolamine, and triethanolamine.

Preferred examples of component (A) include sodium N-cocoyltaurine, sodium N-cocoyl-N-methyltaurine, sodium N-lauroyl-N-methyltaurine, N-coconut fatty acid-N-methyltaurine. Sodium, N-coco fatty acid-N-methyl taurine triethanolamine, N-palm oil fatty acid-N-ethyl taurine triethanolamine, N-cocoyl taurine magnesium, N-cocoyl-N-methyl taurine magnesium, N-lauroyl- Examples thereof include, but are not limited to, magnesium N-taurine, magnesium N-lauroyl-N-methyltaurine, and N-coconut fatty acid-magnesium N-methyltaurine.
Among them, N-coconut fatty acid-N-methyltaurine sodium, N-coconut fatty acid-N-methyltaurine triethanolamine, N-coconut fatty acid-N-methyltaurine magnesium and the like are particularly preferable. In the present invention, the component (A) may be used alone or in combination of two or more.

The amount of the component (A) in the detergent composition of the present invention varies depending on the optional components to be compounded.
From the viewpoint of safety, detergency, etc., 5 to 50% by weight is preferable,
In particular, it is 10 to 30% by weight.

N as the component (B) used in the present invention
-Alkyl pyrrolidone is represented by the following general formula (II)

[0016]

Embedded image (Wherein, R ³ represents a linear alkyl group having an average carbon number of 8 to 16). The _{^{R 3, C 8 H 17,}} C 9 H 19, C 10 H 21, C 1 1 H 23, C 12
H ₂₅ , C ₁₃ H ₂₇ , C ₁₄ H ₂₉ , C ₁₅ H ₃₁ , C ₁₆ H _{33 and the} like are specifically exemplified. Among them, C ₈ H ₁₇ (= N-octylpyrrolidone), C ₁₂ H ₂₅ (= N-dodecylpyrrolidone) and the like are preferable in consideration of the influence of the odor when blended. (B) The components are “SURFADONE LP-100”, “SURFAD
ONE LP-300 ”(both in the United States and International Sp
ecialty Products) and are commercially available. In the present invention, the component (B) may be used alone or in combination of two or more.

The amount of the component (B) in the detergent composition of the present invention is preferably 3 to 7% by weight, particularly 4 to 6% by weight, from the viewpoint of sufficiently exhibiting viscosity.

The long chain acyl lower alkyl taurine salt type anionic surfactant as the component (A) has a basic surfactant action such as foaming property and detergency, and is a general anionic surfactant. Compared to ionic surfactants, protein degradation performance is weak and safety is high, but it maintains a moderate viscosity that is easy to use as cosmetics for a long time,
It is extremely difficult to obtain a system that maintains H for a long time.

In the present invention, a long-chain acyl lower alkyltaurine salt type anionic surfactant represented by the above general formula (I) as the component (A) and an N-alkylpyrrolidone as the component (B) are used. By using a combination of these, it was possible to maintain a low irritation to the skin, and at the same time, maintain an appropriate viscosity for a long period of time, and succeeded in obtaining a detergent composition capable of maintaining the initial pH for a long period of time. .

The viscosity of the cleaning composition of the present invention measured at 30 ° C. with a B-type viscometer (12 rpm / 1 min) is 300 to 5000 mPa · s, particularly 500 to 300 mPa · s.
It is preferably about 0 mPa · s. In the cleaning composition of the present invention, this viscosity can be maintained for a long time. Specifically, for example, the viscosity after one hour after the production of the cleaning composition of the present invention and the viscosity after storing the composition at a temperature of 45 ° C. for 28 days are represented by the rate of change of the viscosity shown by the following formula 1. When the long-term stability of the viscosity is evaluated, a detergent composition having a long-term viscosity stability of 0.8 to 1 in rate of change in viscosity can be obtained.

[0021]

## EQU1 ## Rate of change in viscosity = (viscosity after storage at 45 ° C. for 28 days)
/ (Viscosity 1 hour after production)

Further, the p value at the beginning of the production of the detergent composition of the present invention is
H is preferably about 5 to 7, particularly about 5.5 to 6.5. In the cleaning composition of the present invention, this pH can be maintained for a long time. Specifically, for example, from the pH (25 ° C.) one hour after the sample production and the pH (25 ° C.) of the sample after storage for two months in a 45 ° C. constant temperature bath after the sample production,
When the amount of change in pH is calculated from the equation shown in Equation 2 below,
A cleaning composition whose variation is less than 0.2 is obtained.

[0023]

## EQU2 ## pH change = (pH after 1 hour of production)-(45
℃, pH after storage for 2 months)

The detergent composition of the present invention may further comprise, in addition to the above-mentioned components, monohydric alcohols, polyhydric alcohols, polysaccharides, oils, and proteins within a quantitative and qualitative range according to the purpose, without impairing the effects of the present invention. Derivatives, drugs, inorganic acids or their salts,
Components generally blended in the detergent composition, such as organic acids or salts thereof, antioxidants, ultraviolet absorbers, dyes, and fragrances, may be added.

Here, examples of the monohydric alcohol include ethanol, propanol and the like.

Examples of the polyhydric alcohol include 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, dipropylene glycol, glycerin, Diglycerin, sorbitan, sorbitol, maltitol,
Glucose, sucrose and the like can be mentioned.

Examples of the polysaccharide include hyaluronic acid, chondroitin sulfate, dermatan sulfate, keratan sulfate, heparan sulfate and salts thereof.

As oils, oils commonly used in cosmetics such as orange oil, olive oil, and various herb oils can be added in addition to silicone oil and hydrocarbon oil.

Drugs include vitamin C, vitamin E
, Amino acids, crude drugs, anti-inflammatory agents, bactericides, and other commonly used cosmetic agents.

Examples of the inorganic acids or salts thereof include hydrochloric acid, sulfuric acid, sodium chloride, potassium chloride and the like.

The organic acids or salts thereof include citric acid, lactic acid, tartaric acid, phthalic acid, trisodium citrate,
Sodium lactate and the like.

[0032]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. In addition, all compounding amounts are weight%.

Prior to the examples, test methods and evaluation methods employed in each example will be described.

[Safety (low irritation): protein denaturation rate] Shows a good correlation with the eye irritation intensity of the Draize method.
Evaluation was performed by measuring protein denaturation (HDR) (%) using hemoglobin (Hb) protein.
That is, when a sample was added to a hemoglobin (Hb) pH 6.86 buffer solution using a multi-plate reader so that the sample concentration became 1%, Hb 415 before and after mixing was measured.
change in protein absorbance (HDR)
(%) Was measured and evaluated as follows.

[0035]

HDR (%) = ｛[Ac] − [As] / [A
c] − [Ab]｝ × 100

[Ac]: Absorbance at 415 nm of Hb buffer solution (control) [As]: 415 after Hb denaturation with aqueous solution of test substance
nm Absorbance [Ab]: 415 nm absorbance of aqueous solution of test substance

(Evaluation) ：: HDR less than 5% ○: HDR 5% or more and less than 15% Δ: HDR 15% or more and less than 50% ×: HDR 50% or more

[Viscosity / Long-term Viscosity Stability] The viscosity (25 ° C.) one hour after the sample production was measured using a B-type viscometer (12 rpm / 1 mi).
n).

Separately, after the sample is manufactured, the temperature is adjusted to 45 ° C.
After storing the sample in a thermostat for 28 days, the sample was stored in a thermostat at 25 ° C. for 1 day, and then a B-type viscometer (12 rpm /
1 min).

(Evaluation of viscosity) ○: Viscosity of the product stored at 45 ° C. (measured at 25 ° C.) is 2000 mPa · s or more Δ: Viscosity of the product stored at 45 ° C. (measured at 25 ° C.) is 500 mPa · s or more and 20
Less than 00mPa · s ×: Viscosity of the product stored at 45 ° C (measured at 25 ° C) is less than 500mPa · s

(Evaluation of Long-Term Viscosity Stability) The rate of change in viscosity was calculated by the following equation and evaluated as follows.

[0042]

## EQU4 ## Rate of change in viscosity = (viscosity after storage at 45 ° C. for 28 days)
/ (Viscosity 1 hour after production)

：: Change rate of viscosity 0.8 or more and 1.0 or less Δ: Change rate of viscosity 0.6 or more and less than 0.8 ×: Change rate of viscosity less than 0.6

[Long-term pH stability] p after 1 hour of sample production
H (25 ° C.) was measured with a pH meter. Separately, the sample was stored at 45 ° C. constant temperature bath for 2 months after the sample was manufactured, and the sample was measured at 25 ° C. using a pH meter. The amount of change in pH was calculated by the following formula and evaluated as follows.

[0045]

## EQU5 ## Change in pH = (pH after 1 hour of production)-(45
℃, pH after storage for 2 months)

(Evaluation) ○: Absolute value of pH change less than 0.2 △: Absolute value of pH change 0.2 to less than 0.5 ×: Absolute value of pH change 0.5 or more

(Examples 1 to 4, Comparative Examples 1 to 4) Hair Shampoo A hair shampoo having the composition (% by weight) shown in Table 1 below was prepared by a conventional method, and its safety (Hb protein denaturation rate) ), Viscosity, viscosity long-term stability and pH long-term stability. Table 1 shows the results.

[0048]

[Table 1] As is evident from the results in Table 1, the hair shampoo of the present invention has excellent skin safety, viscosity, long-term viscosity stability, p
Good results were shown in any of the H long-term stability.

(Examples 5 to 6, Comparative Examples 5 to 9) Hair shampoo A hair shampoo having the composition (% by weight) shown in Table 2 below was prepared by a conventional method and its safety (Hb protein denaturation rate) ), Viscosity, viscosity long-term stability and pH long-term stability. Table 2 shows the results.

[0050]

[Table 2] As is evident from the results in Table 2, the hair shampoo of the present invention has excellent skin safety, viscosity, long-term viscosity stability, p
Good results were shown in any of the H long-term stability.

(Example 7) Hair shampoo The hair shampoo of Example 7 was prepared by a conventional method.

(Combination component) (% by weight) N-coconut oil fatty acid-N-methyltaurine triethanolamine 20 N-dodecylpyrrolidone 5 “Polymer JR-400” 0.3 citric acid 1 dipotassium glycyrrhizinate 0.1 Sodium benzoate qs perfume qs Purified water balance (Evaluation) The hair shampoo of Example 7 has excellent skin safety and good results in viscosity, viscosity long-term stability and pH long-term stability. Indicated.

(Example 8) Hair rinse in shampoo The hair rinse in shampoo of Example 8 was prepared by a conventional method.

(Combination component) (% by weight) N-coconut oil fatty acid-N-methyltaurine sodium 10 N-octylpyrrolidone 4 polyoxyethylene (4) stearyl ether 0.1 “Polymer JR-400” 0.3 Dimethylaminopropylamide stearate 0.1 Citric acid 0.5 Stearic acid 0.2 Sodium benzoate qs Perfume qs Purified water balance (Evaluation) The hair rinse in shampoo of Example 8 has excellent skin safety. Good results were shown in all of the viscosity, viscosity long-term stability and pH long-term stability.

Example 9 Body Cleansing The body cleansing of Example 9 was prepared by a conventional method.

(Combined component) (% by weight) N-coconut fatty acid-sodium N-methyltaurine 6 N-octylpyrrolidone 5 polyoxyethylene (8) behenyl ether 0.1 Xanthan gum 0.8 Artemisia extract 0. 1 Tocopherol acetate 0.1 Perfume Appropriate amount Purified water balance (Evaluation) The body cleansing of Example 9 is excellent in safety to skin, and has good results in viscosity, viscosity long-term stability and pH long-term stability. showed that.

(Example 10) Face wash The face wash of Example 10 was prepared by a conventional method.

(Combination component) (% by weight) N-coconut fatty acid-sodium N-methyltaurine 3 N-dodecylpyrrolidone 5 N-cocofatty acid-N-amidopropylbetaine 3 polyoxyethylene (3) cetyl ether 0 1.1 Xanthan gum 0.3 Menthol 0.1 Perfume Appropriate amount Purified water balance (Evaluation) The face wash of Example 10 has excellent skin safety, and has excellent viscosity, long-term viscosity stability, and long-term pH stability. Also showed good results.

Example 11 Body Cleansing The body cleansing of Example 11 was prepared by a conventional method.

(Combination component) (wt%) coconut oil fatty acid arginine 10 N-coconut oil fatty acid-sodium N-methyltaurine 6 polyoxyethylene (8) behenyl ether 0.1 N-dodecylpyrrolidone 3 flavor appropriate amount methylparaben Appropriate amount Purified water Residue (Evaluation) The body cleansing of Example 11 was excellent in skin safety, and showed good results in all of viscosity, long-term viscosity stability and long-term pH stability.

Example 12 Body Cleansing The body cleansing of Example 12 was prepared by a conventional method.

(Combination component) (% by weight) N-coconut fatty acid-sodium N-methyltaurine 8 N-coconut fatty acid-N-sarcosine triethanolamine 8 alkyl glucoside 5 1,3-butylene glycol 5 N- Dodecylpyrrolidone 6 Ethylene glycol distearate 2 Sodium benzoate Appropriate amount Perfume Appropriate amount Purified water balance (Evaluation) Body cleansing of Example 12 is excellent in skin safety, viscosity, viscosity long-term stability, pH long-term stability Good results were obtained in all the properties.

Example 13 Body Cleansing The body cleansing of Example 13 was prepared by a conventional method.

(Combination component) (% by weight) Propylene glycol 10 Hydroxylauryl ether carboxylic acid 10 N-coconut oil fatty acid-N-methyltaurine magnesium 5 Potassium laurate 5 Potassium myristate 5 Methylhydroxypropylcellulose 0.3 Ethylene Glycol distearate 2 N-octylpyrrolidone 3 Ethylene glycol distearate 2 Perfume Appropriate amount Trisodium edetate Appropriate amount Purified water balance (Evaluation) Body cleansing of Example 13 is excellent in safety to skin, Good results were shown in both long-term viscosity stability and long-term pH stability.

[0065]

As described in detail above, according to the present invention, it has extremely low irritation to human skin and hair, has a viscosity that can satisfy the value as a product, and has a long period of time. However, the present invention provides a detergent composition that maintains good viscosity even when the composition is used and has excellent long-term pH stability.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AA112 AC122 AC172 AC182 AC242 AC302 AC312 AC392 AC482 AC542 AC642 AC662 AC712 AC782 AC791 AC792 AC851 AC852 AD132 AD192 AD282 AD352 AD532 AD662 CC23 CC38 CC39 DD23 EE01 EE06 EE10 4H003 AB12 DA03 AE03 EB07 EB08 ED02 FA01 FA02 FA16 FA28 FA30

Claims (2)

[Claims] (A) The following general formula (I): (Wherein R ¹ CO represents a saturated or unsaturated fatty acid residue (acyl group) having an average of 8 to 20 carbon atoms; R ² represents a hydrogen atom or an alkyl group having an average of 1 to 3 carbon atoms;
M ¹ represents an alkali metal, an alkaline earth metal, ammonium or an organic amine) and one or more of long-chain acyl-lower-alkyl-taurine-type anionic surfactants represented by (B) 1) N-alkylpyrrolidone
A cleaning composition comprising a seed or two or more kinds. 2. The component (B) has the following general formula (II): (Wherein, R ³ is the average number of carbon atoms represents a linear alkyl group having 8 to 16) is a compound represented by Claim 1 detergent composition.