JP2010235833A - Cleaning composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning composition which has high viscosity and is excellent in feelings when used. <P>SOLUTION: The cleaning composition contains (A) N-acyl acidic amino acid or salt thereof, (B) an amphoteric surfactant, (C) 3-8 mass% monoglycerol fatty acid monoester and (D) ≤0.08 mass% or no alkaline earth metal salt. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cleaning composition, particularly a cleaning composition containing an N-acyl acidic amino acid or a salt thereof.

Since N-acyl acidic amino acids or salts thereof have a low skin irritation potential, many applications for cleaning agents for cleaning the body have been studied. However, such a cleaning material has a problem that the viscosity is low in a region close to the pH of the skin and is difficult to use.
Various studies have been made to solve this problem. For example, there is a method of adding an amphoteric surfactant such as betaines. However, with this method, the cleaning agent slightly thickens, but it is not sufficient in practice. Therefore, there is a method of further increasing the viscosity by adding a polymer compound such as cellulose. However, when cationized cellulose, hydroxyethyl cellulose (HEC), or hydroxypropyl cellulose (HPC), which are used as polymer compounds here, are added to the cleaning agent, the cleaning agent gets wet and pulls the thread. There may be room for improvement.
On the other hand, for example, in Patent Document 1, a specific amount of an anionic surfactant and a specific amount of amphotericity are used as a detergent composition having good detergency and having an excellent thickening action without reducing the feeling of use. There is provided a detergent composition containing a surfactant and a sucrose fatty acid ester having an HLB value of 6 or more.
Patent Document 2 discloses coconut oil fatty acid-L-glutamic acid triethanolamine salt, coconut oil alkyldimethylacetic acid betaine, coconut oil fatty acid amide propylbetaine, coconut oil fatty acid diethanolamide, polyoxyethylene alkyl ether, A shampoo composition having a good thickening effect is disclosed.
Patent Document 3 discloses that N-long-chain acyl acidic amino acids and / or salts thereof, a specific amphiphile, an inorganic salt, and water are used as essential components without depending on other thickeners. A thickening composition that thickens is disclosed.
On the other hand, in Patent Document 4, a specific (monoacylglycerin) monoglyceride is incorporated into a specific acylated amino acid type surfactant (such as lauroylglycine sodium salt or lauroyl-β-alanine potassium salt) to provide foaming properties. It is disclosed that an excellent cleaning composition can be obtained.

JP 2007-138023 A JP-A-2-247114 International Publication No. 05/78039 Pamphlet JP-A-5-156295

However, in the methods described in Patent Documents 1 and 2, all of the third component such as sucrose fatty acid ester, coconut oil fatty acid diethanolamide, polyoxyethylene alkyl ether, and the like are used in an anionic surfactant and amphoteric interface. It is difficult to sufficiently increase the viscosity unless it is contained in a large proportion or various kinds with respect to the total amount of the active agent.
Further, in the method described in Patent Document 3, thickening of the cleaning material is achieved by containing a large amount of alkaline earth metal salt (Example 11 and Comparative Example 19). Cleaning materials containing a large amount of earth metal salts have room for improvement in terms of low-temperature stability.
On the other hand, since the detergent composition described in Patent Document 4 is mainly composed of lauroylglycine sodium salt, lauroyl-β-alanine potassium salt and the like instead of N-acyl acidic amino acid, a weakly acidic region. Thus, there is no problem that it is difficult to increase the viscosity, and a specific monoglycerin fatty acid monoester is added to improve foamability.

In such a situation, the present inventor has made extensive studies focusing on the micelle formation mechanism of N-acyl acidic amino acids and salts thereof that are difficult to thicken, and as a result, N-acyl acidic amino acids or salts thereof and amphoteric surface activity. Found that when a specific amount of monoglycerin fatty acid monoester is added to a cleaning composition containing an agent, an increase in viscosity can be achieved even if the amount of alkaline earth metal salt is very small or not contained. It was.
Therefore, the present invention achieves an increase in viscosity without deteriorating the low-temperature stability and feeling of use in a cleaning composition containing an N-acyl acidic amino acid and a salt thereof.

That is, the present invention
(A) an N-acyl acidic amino acid or a salt thereof,
(B) an amphoteric surfactant and (C) a monoglycerin fatty acid monoester containing 3% by mass to 8% by mass,
(D) A cleaning composition containing 0.08% by mass or less of an alkaline earth metal salt or not containing an alkaline earth metal salt is provided.

  According to the present invention, there is provided a cleaning composition having a high viscosity and excellent usability such as detergency, foamability, low-temperature storage stability, foam feel and no sliminess, and ease of rinsing. The

Hereinafter, embodiments of the present invention will be described.
In the present invention, the cleaning composition is for cleaning the body, and in particular, it has a viscosity of 300 mPa · The cleaning composition achieves s or more, preferably 600 mPa · s or more, and more preferably 1000 mPa · s or more.
The upper limit of the viscosity is not particularly limited, but is, for example, 100,000 mPa · s or less, preferably 10,000 mPa · s or less, and more preferably 5000 mPa · s or less.

Next, the cleaning composition of the present invention will be described in detail.
The cleaning composition of the present invention comprises:
(A) an N-acyl acidic amino acid or a salt thereof,
(B) an amphoteric surfactant,
(C) 3 to 8% by mass of monoglycerin fatty acid monoester,
(D) A cleaning composition containing 0.08% by mass or less of an alkaline earth metal salt or not containing an alkaline earth metal salt.
(Ingredient (A))
As the component (A) N-acyl acidic amino acid or a salt thereof used in the cleaning composition of the present invention, any of those used in ordinary cleaning compositions may be used. Of these, linear or branched ones derived from saturated or unsaturated fatty acids having 10 to 18 carbon atoms in the acyl group are preferred. By making the carbon number of the acyl group 10 or more, there is an effect that the odor is good and crystals are difficult to precipitate, and by making the carbon number of the acyl group 18 or less, the foam quality does not become heavy and foaming is good There is an effect of becoming. Examples of such an acyl group include caprynoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, isostearoyl group, oleoyl group, linole group, linolene group and cocoyl group. Among these, caprynoyl group, lauroyl group, myristoyl group and cocoyl group are preferable from the viewpoint of good foaming and foam quality, and cocoyl group is particularly preferable because it is difficult to crystallize and has good stability.
In addition, when a plurality of N-acyl acidic amino acids or salts thereof having different acyl group carbon numbers are present, the N-acyl acidic amino acid or the salt thereof means the carbon number having the highest content.

As the acidic amino acid of component (A), glutamic acid and aspartic acid can be used. These amino acids may be L-form, D-form or DL-form. Glutamic acid is preferred from the viewpoint of stability and good feeling of use of the material after acylation.
In addition, the component (A) may be used in any state of an acid, a salt, or a part of the salt. The salt of the component (A) is not particularly limited, and examples thereof include alkali metal salts such as sodium and potassium, inorganic salts such as polyvalent inorganic salts other than alkaline earth metals such as aluminum and zinc, ammonia, monoethanolamine, Examples include organic amines such as diethanolamine and triethanolamine, or organic salts such as basic amino acids such as arginine and lysine. From the viewpoints of low-temperature stability, availability, handleability, and the like, alkali metal salts and organic amine salts are preferable, and sodium, potassium, and triethanolamine are particularly preferable.

  From the above, specific examples of component (A) include N-lauroyl glutamic acid, N-myristoyl glutamic acid, N-palmitoyl glutamic acid, N-stearoyl glutamic acid, N-cocoyl glutamic acid, N-lauroyl aspartic acid, N-cocoyl aspartic acid, N-myristoyl aspartic acid, N-palmitoyl aspartic acid, N-stearoyl aspartic acid, etc. are mentioned, Furthermore, these sodium salts, potassium salt, triethanolamine salt, etc. are mentioned.

Among these, from the viewpoints of foamability and low-temperature stability, particularly preferred are sodium N-lauroyl glutamate, potassium N-lauroyl glutamate, sodium N-cocoyl glutamate and potassium N-cocoyl glutamate.
In addition, a component (A) can mix and use the 1 type (s) or 2 or more types of the said range as needed.

  Component (A) is preferably 3% by mass or more, more preferably 5% by mass or more, and particularly preferably 8% by mass or more in the cleaning composition from the viewpoint that the cleaning effect is enhanced and foaming is improved. Moreover, it is 40 mass% or less from a viewpoint that there is no deterioration of the feeling of use by the slimming after washing | cleaning, and there is little irritation | stimulation to skin, Furthermore, it is preferable that it is 15 mass% or less.

(Ingredient (B))
Examples of the component (B) amphoteric surfactant used in the cleaning composition of the present invention include betaine surfactants, amino acid surfactants, imidazoline surfactants, amine oxide surfactants, and the like. Any of those used in ordinary cleaning compositions may be used. Of these, betaine surfactants are preferred in terms of foaming and thickening. Examples of such betaine-type surfactants include sulfobetaines such as ralyl sulfobetaine, alkylbetaines such as lauryldimethylbetaine, alkylamidopropylbetaines such as coconut fatty acid amidepropylbetaine, and alkylbetaines such as lauryldimethylamine oxide. Examples thereof include imidazolinium betaines such as amine oxide, 2-undecyl-1-carboxymethyl-1-hydroxyethylimidazolinium betaine, and 2-alkyl-1-carboxymethyl-1-hydroxyethylimidazolinium betaine. 1 type, or 2 or more types can be mixed and used according to. In particular, sulfobetaines such as ralylsulfobetaine are preferred because of good foaming.

  The component (B) is preferably 1% by mass or more, more preferably 3% by mass or more, and particularly preferably 5% by mass or more in the cleaning composition from the viewpoint that the foam increasing effect and the foam feel are improved. Moreover, from a viewpoint that the excessive feeling of slimming at the time of a rinse reduces, it is preferable that it is 20 mass% or less, Furthermore, it is 10 mass% or less.

(Ingredient (C))
Any component (C) monoglycerin fatty acid monoester used in the cleaning composition of the present invention may be used as long as it is used in ordinary cleaning compositions. By including such a component (C) in an amount of 3% by mass or more and 8% by mass or less, not only a remarkable thickening effect can be obtained, but the viscosity of the cleaning composition can be improved without causing problems in foaming. Therefore, the cleaning composition has a good feeling of use. Among them, when the fatty acid residue has 10 or more carbon atoms, the odor can be improved. Moreover, it can be set as favorable foaming as it is 18 or less. Specific examples of such monoglycerin fatty acid monoesters include glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopaltimate, and glyceryl monostearate. In addition, as a component (C), 1 type (s) or 2 or more types can be mixed and used as needed.
Here, the carbon number of the fatty acid residue of the component (C) monoglycerin fatty acid monoester means that, when (C) the monoglycerin fatty acid monoester has a plurality of fatty acid residue carbon atoms, The carbon number with the highest content.

  When the content of the component (C) in the cleaning composition of the present invention is further 4% by mass or more and 7% by mass or less, the viscosity of the cleaning composition can be remarkably increased and the foamability is also improved. .

(Component (D))
The cleaning composition of the present invention contains 0.08% by mass or less of component (D) alkaline earth metal salt. Thereby, it can prevent that low temperature stability falls.
Furthermore, preferably, the cleaning composition of the present invention is substantially free of component (D) alkaline earth metal salt. “Substantially not contained” means that an alkaline earth metal salt is not intentionally added, and includes those that are inevitably mixed in production. However, it is more preferable that no component (D) alkaline earth metal salt is contained.
By this, it can prevent more reliably that the low temperature stability of a cleaning composition falls.

  Furthermore, in the cleaning composition of the present invention, the mass ratio [(A) + (B)] :( C) of the components (A), (B) and (C) is 20: 1 to 2: 1, preferably 10: 1 to 5: 1, more preferably 6: 1 to 3: 1 is preferable because the thickening effect is good.

Furthermore, in the cleaning composition of the present invention, the cleaning composition is effectively made by setting the difference between the carbon number of the fatty acid residue of component (C) and the carbon number of the acyl group of component (A) to 4 or less. Can increase the viscosity. The difference here is an absolute value, and it may be the case where either the carbon number of the fatty acid residue of the component (C) or the carbon number of the acyl group of the component (A) is large. Particularly effective is that the difference between the carbon number of the fatty acid residue of component (C) and the carbon number of the acyl group of component (A) is 2 or less, thereby increasing the viscosity of the cleaning composition. The action is greatly enhanced.
In addition, as above-mentioned, as for a component (A) and a component (C), as for all, the carbon number of the acyl group of a component (A) and the carbon number of the fatty acid residue of a component (C) differ as needed. Two or more kinds can be mixed and used. In this case, the difference between the carbon number of the fatty acid residue of the component (C) and the carbon number of the acyl group of the component (A) indicates the difference in the carbon number having the largest content in each component. is there. For example, when the component (A) is sodium N-cocoylglutamate and the component (C) is glyceryl monolaurate, the acyl group having the largest content in the component (A) sodium N-cocoylglutamate has 12 carbon atoms. The difference between the carbon number of the fatty acid residue of component (C) and the carbon number of the acyl group of component (A) is 0 at 12-12.

In the cleaning composition as described above, the component (A), the component (B) and the component (C) are weakly acidic regions close to the skin pH, that is, pH 4.5 to 6.5, particularly pH 5.3 to 6. A cleaning composition suitable for body cleansing agents such as shampoos, body soaps, and facial cleansers can be obtained by adjusting and mixing in the 0 region with a pH adjusting agent as necessary.
The pH adjusting agent in the cleaning composition of the present invention is not particularly limited as long as it is usually used for a cleaning agent, etc., but is not limited to inorganic acids such as hydrochloric acid and phosphoric acid, citric acid, lactic acid, malic acid, tartaric acid. Organic acids such as these, and pH buffering agents combining these and their salts can be used. Of these, malic acid and citric acid are particularly preferred.

  In addition to the components (A) to (D) described above, the cleaning composition includes oil, other surfactants, antioxidants, ultraviolet absorbers, humectants, fragrances, dyes, pigments, pigments, preservatives. Additives such as vitamins, hormones, deodorants, pH adjusters and the like can be appropriately added as long as they do not affect the present invention.

  Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within a scope that can solve the problems of the present invention are included in the present invention.

Next, examples of the present invention will be described.
Example 1
A cleaning composition having the composition shown in Table 1 was prepared by the following method.
Sodium N-cocoylglutamate (component (A), carbon number of acyl group 12), lauryl sulfobetaine (component (B)), glyceryl monocaprate (component (C), carbon number of fatty acid residue 10), A pH adjuster (malic acid) and purified water were placed in a container, heated to 70 ° C. and dissolved with stirring to prepare a weakly acidic (pH 5.4 in 5% aqueous solution) cleaning composition.

(Examples 2 to 7) and (Comparative Examples 1 to 5)
A cleaning composition having the composition described in Table 1 or 2 was prepared in the same manner as the preparation method of Example 1. In Examples 2, 4, 6, and 7, glyceryl monolaurate (carbon number of fatty acid residue: 12) was used as component (C).

(Evaluation of Examples 1-7 and Comparative Examples 1-5)
The viscosity of the cleaning composition obtained in each example and comparative example was measured. For the viscosity measurement, a B-type viscometer (manufactured by Toki Sangyo Co., Ltd., trade name TVB-10 type viscometer) was used, and measurement was performed at rotor No. M2 to M3, rotation speed 12 rpm to 60 rpm, and 30 ° C.
The results are shown in Tables 1 and 2.
In addition, all of Examples 1-7 and Comparative Examples 1-5 contain substantially no alkaline earth metal salt.

In Examples 1 to 7, all have a viscosity of 300 mPa · s or more, have a desired viscosity, low temperature stability (no change in appearance even when left at 5 ° C. for a long time), and It was possible to obtain a cleaning composition having excellent usability such as detergency, foaming property, feel of foam and lack of sliminess and ease of rinsing.
On the other hand, in Comparative Examples 1-5, all the viscosity was as low as less than 300 mPa * s.

  The cleaning composition of the present invention can be used in various cleaning agents such as facial cleansers, makeup removers, body soaps, hand soaps, hair shampoos, tableware detergents, and detergents, and is particularly safe and non-irritating. Since it is excellent, it is suitable as a cleaning agent for sensitive skin.

Claims (6)

(A) an N-acyl acidic amino acid or a salt thereof,
(B) an amphoteric surfactant and (C) monoglycerin fatty acid monoester containing 3% by mass or more and 8% by mass or less,
(D) A cleaning composition containing 0.08% by mass or less of an alkaline earth metal salt or not containing an alkaline earth metal salt.   The cleaning composition according to claim 1, which is substantially free of the component (D) alkaline earth metal salt.   The cleaning composition according to claim 1 or 2, wherein the component (A) N-acyl acidic amino acid or a salt thereof has 10 to 18 carbon atoms.   The cleaning composition according to any one of claims 1 to 3, wherein the fatty acid residue of the component (C) monoglycerin fatty acid monoester has 10 to 18 carbon atoms.   The difference between the carbon number of the acyl group of the component (A) N-acyl acidic amino acid or a salt thereof and the carbon number of the fatty acid residue of the component (C) monoglycerin fatty acid monoester is 4 or less. 5. The cleaning composition according to any one of 4 above.   The mass ratio [(A) + (B)] :( C) of the components (A), (B) and (C) is 20: 1 to 2: 1. The cleaning composition as described.