CN113712840A

CN113712840A - Mild cleansing compositions

Info

Publication number: CN113712840A
Application number: CN202111202504.8A
Authority: CN
Inventors: 周伟; 黄湘伟; 王美英; 黄闵暄
Original assignee: Guangzhou Enpir Cosmetic Co ltd
Current assignee: Guangzhou Enpir Cosmetic Co ltd
Priority date: 2021-01-10
Filing date: 2021-10-15
Publication date: 2021-11-30

Abstract

The present invention provides a mild cleansing composition. The cleaning composition comprises the following components in percentage by weight: a) 1% to 30% by weight of an amphoteric surfactant; b) 1% to 30% by weight of an alkyl glycoside carboxylic acid surfactant having the structure:

wherein n is₁Represents the number of glycoside units, n₂Selected from saturated and monounsaturated C₁₀‑C₂₀A linear or branched alkyl chain, preferably selected from: c₈、C₁₂、C₁₄、C₁₆And C₁₈A linear alkyl chain, R is H or a salt ion, selected from 5-30, preferably 8-18, and wherein the weight ratio of amphoteric surfactant to alkyl glycoside carboxylic acid surfactant is from about 10:1 to about 1: 40. The cleansing compositions of the present invention are milder to the skin and eyes than other cleansing compositions.

Description

Mild cleansing compositions

Technical Field

The present invention relates to a cleansing composition, and in particular to a cleansing composition that is milder to the skin and eyes.

Background

Surfactants are widely used in water-based personal care, household, and industrial products. They are commonly used as wetting agents, detergents and emulsifiers. In personal care cleansing products, surfactants are often the most important components because they provide many of the cleansing attributes of the composition.

Although in principle any surfactant class (e.g., cationic, anionic, nonionic, amphoteric) is suitable for cleaning applications, in practice most cleaning compositions employ anionic surfactants as the primary surfactant, since anionic surfactants generally exhibit superior cleaning and foaming properties. However, these anionic surfactants are very irritating to the skin and eyes at ordinary usage levels. In order to produce milder cleansing compositions, it is known to replace some of the anionic surfactants with other surfactants (e.g., nonionic and/or amphoteric surfactants). Unfortunately, these mild cleansing compositions often have poor lathering and cleansing properties; the jelly is easy to change at low temperature and is not easy to topple; if it is a transparent product, it is also easily clouded.

According to the invention, the anionic glycoside and the amphoteric surfactant are used in a combined manner, and surprisingly, the composition can not only keep the cleaning performance and foaming power of the anionic surfactant, but also keep the mildness of the alkyl glycoside, and overcomes the defects of high irritation of the traditional anion, insufficient foaming power of the glycoside, easiness in jelly and the like.

Thus. It is an object of the present invention to provide effective cleansing compositions which have good lathering properties and are mild to the skin and eyes.

Disclosure of Invention

The present invention relates to a personal cleansing composition comprising, consisting of, and/or consisting essentially of, based on the total weight of the composition:

a) 1% to 30% by weight of an amphoteric surfactant;

b) 1% to 30% by weight of an alkyl glycoside carboxylic acid surfactant;

wherein the weight ratio of component a) to component b) is from about 10:1 to about 1: 40.

The various ingredients of the compositions of the present invention will now be described, along with various selected ingredients and preferred ingredients, components, and limitations that are applicable to the particular embodiments of the present invention. All percentages and ratios are by weight, calculated as the total weight of the composition of the invention, and the ingredients are calculated as the active ingredient content, unless otherwise indicated.

A. Alkyl glycoside carboxylic acid surfactants

The alkyl glycoside carboxylic acid has the structure:

wherein n is₁Represents the number of glycoside units, selected from 5 to 30, preferably 8 to 18, n₂Selected from saturated and monounsaturated C₁₀-C₂₀A linear or branched alkyl chain, preferably selected from: c₈、C₁₂、C₁₄、C₁₆And C₁₈A linear alkyl chain, R is H or a salt ion, the alkyl glycoside carboxylic acid surfactant may be in the carboxylic acid form, or it may be in the form of an alkyl glycoside carboxylate surfactant. The alkyl chain may be straight or branched, preferably it is straight. R₁Selected from saturated and monounsaturated C₁₀-C₂₀A linear or branched alkyl chain, preferably selected from: c₁₂、C₁₄、C₁₆And C₁₈Straight alkyl chain

In the present invention, the alkyl polyglycoside carboxylic acid is preferably sodium lauryl glucarate (and) lauryl glucoside, obtainable from BASF (Plantapon LGC Sorb).

The alkyl glycoside carboxylic acids suitable for use in the present invention, preferably sodium lauryl glucarate (and) lauryl glucoside, have both the mild properties of APG and excellent lathering and sensory properties, and are particularly suitable for use in mild rinse-off personal care products. .

B. Amphoteric surfactant

The zwitterionic surfactant suitable for use in the present invention includes at least one of an alkyl betaine type surfactant, an amido betaine type surfactant, a sulfobetaine type surfactant, a hydroxysulfobetaine type surfactant, an amido sulfobetaine type surfactant, a phosphoric acid betaine type surfactant, an imidazolinium betaine type surfactant, an amino propionic acid type surfactant, and an amino acid type surfactant.

Among them, preferred are propyl betaine lauramide, betaine lauryl dimethylaminoacetate, coconut fatty acid amidopropyl betaine, coconut fatty acid dimethylaminoacetate betaine, lauryl hydroxysultaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl-imidazolinium betaine, lauryl iminodipropyl ester, N- [ 3-alkyl (12, 14) oxy-2-hydroxypropyl ] -L-arginine hydrochloride.

D. Optional Components

The compositions of the present invention may also contain one or more optional ingredients, including additional surfactants, non-volatile silicones, cationic polymers, suspending agents, antistatic agents, antioxidants, foam boosters, viscosity modifiers, thickeners, PH modifiers, preservatives, pigments, organic solvents or diluents, pearlescent agents, fragrances, fatty alcohols, and the like, as additional optional ingredients known or effective for use in hair care or personal care products.

Additional surfactants may be present in the composition, preferably the cleaning composition comprises from 0 to 20% by weight, more preferably from 0 to 10% of additional surfactant. Typically, the anionic surfactant of the surfactant system may be selected from the group consisting of alkyl sulfonates, alkyl sulfates, acylated amino acid salts, polyoxyethylene alkyl ether sulfates, alkylbenzene sulfonates, N-acyl-N-methyltaurates, alpha-olefin sulfonates, higher fatty acid ester sulfonates, alkyl ether acetates, polyoxyethylene alkyl ether acetates, fatty acid soaps, alkyl phosphate salts, N-lauroyl glutamate, N-palmitoyl glutamate, N-lauroyl-N-ethylglycinate, N-lauroyl sarcosinate and N-myristoyl-beta-alaninate.

Nonionic surfactants suitable for use in the present invention are selected from: polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene glycols, coconut fatty acid alkanolamides, sucrose fatty acid esters, alkyl glycosides, alkyl glyceryl glycosides, and methyl glycoside fatty acid esters. Among them, polyethylene glycol monostearate, decyl glyceryl monolaurate, monoglyceryl behenate, polyoxyethylene lauryl ether, polyoxyethylene stearic ether, polyoxyethylene behenate ether, polyoxyethylene (160) polyoxypropylene (30) glycol, and alkylglycoside are preferable.

Silicone hair conditioning agents for use in the cleansing compositions include silicone oils which are flowable silicone materials having a viscosity of less than 1,000,000 centistokes, preferably from 5 to 1,000,000 centistokes, more preferably from 10 to 600,000 centistokes, even more preferably from 10 to 500,000 centistokes, most preferably from 10 to 300,000 centistokes at 25℃. Suitable silicone oils include polyalkyl siloxanes, polyaryl siloxanes, polyalkylaryl siloxanes, polyether siloxane copolymers and mixtures thereof.

Other suitable silicone fluids for silicone conditioning agents are insoluble silicone gums. These gums are polyorganosiloxanes having a viscosity greater than or equal to 1,000,000 centistokes at 25 ℃. The silicone gum has a mass average molecular weight in excess of 200,000 centistokes, typically between 200,000 and 1,000,000 centistokes, such as at least one of polydimethylsiloxane, dimethylsiloxane-methylvinylsiloxane copolymer, dimethylsiloxane-diphenylsiloxane-methylvinylsiloxane copolymer.

Silicone conditioners also include dimethicone gums (having a viscosity greater than 1,000,000 centistokes) and dimethicone oils (having a viscosity of about 10 to 100,000 centistokes).

Cationic polymers suitable for use in the present invention are capable of being dissolved in the shampoo composition or forming a liquid coacervate in the shampoo composition, which can enhance the conditioning benefits of the shampoo and promote deposition of the silicone particles of the present invention from the shampoo composition onto the hair and/or scalp during application.

Cationic polymers suitable for use in the present invention include at least one of the following: cationic guar gum, polyquaternium-2, polyquaternium-4, polyquaternium-7, polyquaternium-10, polyquaternium-11, Salcare SC60 (ciba company), Salcare SC96 (ciba company). Preferred are cationic guar, polyquaternium-4, polyquaternium-7, polyquaternium-10, and most preferred is polyquaternium-10.

Suspending agents suitable for use in the compositions of the present invention should function to maintain the silicone conditioning ingredients in a suspended state so as to maintain their uniform dispersion in the shampoo composition.

Suspending agents suitable for use in the compositions of the present invention comprise from 0.01% to 10.0%, preferably from 0.1% to 8.0% by weight of the shampoo composition.

Suspending agents suitable for the compositions of the present invention include at least one of the following: xanthan gum, acrylate copolymers (available from NOVEON under the trade name Carbopol SF-1), hydroxypropyl cellulose, hydroxypropyl guar, polyvinyl pyrrolidone, and maleic anhydride-methyl vinyl ether copolymer. Xanthan gum and acrylate copolymers are preferred.

The optional antistatic agent may be a water-insoluble cationic surfactant, typically present in an amount of from 0.1% to 5.0% by weight of the composition. A specific non-limiting example of a suitable antistatic agent is quaternary ammonium salt-80.

Foam boosters useful in the compositions of the present invention include cocoyl monoethanolamine, cocoyl diethanolamine, and mixtures thereof.

The viscosity modifiers and thickeners selected are used in the compositions of the present invention in effective amounts to adjust the paste to the appropriate viscosity. Specific non-limiting examples of such viscosity modifiers and thickeners include: sodium chloride, ammonium chloride and mixtures thereof.

The compositions of the present invention may be prepared by any known or otherwise effective technique suitable for providing compositions, including conventional formulation and mixing techniques.

The compositions of the present invention are used in a conventional manner for cleansing and conditioning the hair, comprising the following steps: (a) wetting the hair with water; (b) applying an effective amount of the above-described cleansing composition (2-20 grams) to the hair, rubbing the cleansing composition into the hair and onto the scalp, thereby contacting the composition with the hair and scalp; (C) rinsing the cleansing composition from the hair with water. These steps can be repeated as many times as necessary to achieve cleansing and conditioning benefits.

Detailed Description

The following are non-limiting examples of cleaning compositions of the present invention. These examples are given for illustrative purposes only and are not to be construed as limiting the present invention. As many variations thereof are possible without departing from the spirit and scope of the invention. In these examples, all concentrations are in weight percent based on the weight of the cleaning composition, unless otherwise specified. The term "minor substances" as used herein refers to those substances which are optional, such as preservatives, viscosity modifiers, pH modifiers, perfumes, colorants, and the like.

Preparation examples

The cleaning compositions of examples (I, II, III, IV, V, VI) (see Table 1) are suitably prepared as follows: about 1/3 to all of the surfactant and some of the water were added to a jacketed mixing tank and heated to about 70 ℃ to 80 ℃ with slow stirring, followed by the addition of cetostearyl alcohol, ethylene glycol distearate, coconut monoethanolamide, zinc sulfate, and the like for further mixing. If conditioning polymers are present (e.g., polyquaternium-7 and polyquaternium-10), they may be added at this point after pre-dispersion. After mixing for at least about 30 minutes, the mixture is cooled to about 50 ℃, the cationic guar is predispersed in water to obtain an aqueous solution of about 0.1% to about 10%, and the dispersion is mixed homogeneously with the aforementioned mixture. The resulting mixture is cooled, the mixture is collected in a finished tank, the remaining surfactant and remaining ingredients are added with stirring, and stirring is continued to ensure a homogeneous mixture. After all the components are added, a viscosity modifier and a pH modifier may be added as needed to adjust the viscosity and pH of the product to a suitable degree. Optionally, a small amount of material may be added last, eventually to make up with deionized water.

TABLE 1 composition of shampoo compositions

Working examples

The effect evaluation method for the examples was: examples (I, II, III, IV, V, VI) were prepared and given to the test population (50 individuals each) for comparison.

The test persons used the shampoo samples and washed their hair in the same manner, each shampoo was used for two weeks. The testers scored according to their own feelings. The scoring criteria used were 7 points, 1 being the worst, 7 being the best, the higher the score the better.

TABLE 2 evaluation of the effectiveness of various shampoo compositions

Mild contrast of cleansing compositions

The irritation of the eyes of a given formulation was determined according to the "trans-epithelial permeability (TEP) test set forth in Invittox Protocol Number 86, Invittox Protocol Number 86 (5 months 1994). In general, the eye irritation that may be present in a product can be assessed by determining its effect on the permeability of the cell layer, for example by fluorescein leaking through the cell layer. Monolayer of Madin-Darby canine kidney (MDCK) cellsGrown to be combined in a microporous insert in a 24-well plate containing culture or assay buffer in the lower well. The possible presence of irritation of the product was evaluated by measuring the damage of the permeation barrier in the cell monolayer after 15 minutes of placing in a dilution of the product, measured spectrophotometrically. The amount of leakage of fluorescein was plotted against the concentration of test substance to determine EC₅₀Value (concentration of test substance resulting in 50% of maximum dye leakage, i.e. 50% damage of the permeation barrier). Higher scores indicate milder formulations.

Placing a layer of MDCK cells grown on a microporous membrane in a test sample is a model for producing a first phenomenon when a stimulus is brought into contact with the eye. In vivo, a selectively permeable barrier is formed in the outermost layer of the corneal epithelium due to the tight junctions between cells. When exposed to a stimulus, the tight junctions separate, thereby removing the permeation barrier. The liquid is absorbed into the lining and stroma of the epithelium, causing the collagen lamellae to separate, resulting in turbidity. The TEP test measures the effect of stimuli on the disruption of tight junctions between cells in a layer of MDCK cells grown on a microporous insert. The degree of damage was evaluated spectrophotometrically by measuring the amount of labeled dye (sodium fluorescein) that leaked through the cell layer and microporous membrane into the lower well.

Test example I-

Mildness of the resulting composition. Table 3 lists the TEP values of the neutralizers in the various examples:

TABLE 3 temperature contrast

These examples show that the skin and eye irritation associated with compositions containing higher levels of anionic surfactant can be reduced by adding alkyl glycoside carboxylic acid thereto, and that eye irritation associated with compositions can be reduced with increasing amounts of alkyl glycoside carboxylate.

Claims

1. A cleaning composition comprising the following components in weight percent:

a) 1% to 30% by weight of an amphoteric surfactant;

b) 1% to 30% by weight of an alkyl glycoside carboxylic acid surfactant having the structure:

wherein n is₁Represents the number of glycoside units, n₂Selected from saturated and monounsaturated C₁₀-C₂₀A linear or branched alkyl chain, preferably selected from: c₈、C₁₂、C₁₄、C₁₆And C₁₈A linear alkyl chain, R is H or a salt ion, selected from 5-30, preferably 8-18, and wherein the weight ratio of amphoteric surfactant to alkyl glycoside carboxylic acid surfactant is from about 10:1 to about 1: 40.

2. The composition according to claim 1, wherein the composition is a shampoo composition, preferably a liquid shampoo composition.

3. The composition according to claim 1 or claim 2, wherein the cleaning composition is a liquid cleaning composition, more preferably an aqueous cleaning composition.

4. The composition according to claim 1, the alkyl chain R group of the alkyl glycoside carboxylic acid surfactant is selected from saturated and monounsaturated C16-C18 linear alkyl chains, preferably sodium lauryl glucarate (and) lauryl glucoside.

5. A cleaning composition according to claim 1, said alkyl glycoside carboxylic acid surfactant content preferably being from 3% to 26%, more preferably from 6% to 24%, most preferably from 10% to 20%.

6. The cleaning composition according to claim 1, preferably the weight ratio of component a) to component b) is from 10: 3 to 1: 30, more preferably from 10: 5 to 1: 25, most preferably from 10: 8 to 1: 20.

The cleansing composition of claim 1, the amphoteric surfactant selected from betaines, beta-amino propionic acids, imidazolines, and combinations thereof.