JP7558733B2 - Shampoo Composition - Google Patents

Description

The present invention provides a shampoo composition that provides smooth finger combing during rinsing, is not sticky, and leaves hair feeling soft after rinsing.

In recent years, hair coloring, perms, bleaching, and other hair-related habits have become widespread regardless of age or gender, and hair is constantly being exposed to chemical irritation. This can cause damage to the surface and inside of the hair, making ingredients that prevent snagging when washing important. Many conditioning ingredients have been developed to prevent hair from snagging when washing, including cationic polymers such as cationic celluloses, cationic polysaccharides, and silicones. These act as conditioning agents, covering the surface of the hair and reducing hair snagging when washing.

In addition, amino acid-based surfactants are surfactants that enhance conditioning properties when combined with cationic polymers. Compared to conventional laureth sulfate-based surfactants, amino acid-based surfactants are more likely to form coacervates, which are complexes with cationic polymers, and are therefore used as surfactants with high conditioning properties.

In recent years, the use of amino acid-based surfactants in shampoo formulations has become widespread due to their effectiveness in suppressing squeaking during hair washing. For this reason, many shampoos combine amino acid-based surfactants with cationic cellulose or cationic guar gum to provide high hair conditioning properties (Patent Document 1). It has also been reported that using amino acid-based surfactants as the main ingredient in shampoos can further improve hair conditioning during washing (Patent Document 2).

However, while the combination of amino acid surfactants and cationic polymers improves hair conditioning, the coacervate can adhere too much to the hair, causing it to become stiff when rinsing or hard after rinsing.

JP 4-273811 A WO2016/067853

The present invention aims to provide a shampoo composition that combines an amino acid-based surfactant and a cationic polymer, but does not stiffen hair when rinsing, and does not make hair stiff after rinsing.

The present inventors conducted extensive research to solve the above problems, and discovered that the above problems can be solved by adjusting the blending ratio of the amino acid surfactant to the amphoteric surfactant, and the blending ratio of the cationic cellulose to the cationic galactomannan to specific ratios, thereby completing the present invention.

Simply combining an acylamino acid anionic surfactant (hereinafter, (A)), an amphoteric surfactant (hereinafter, (B)), cationic cellulose (hereinafter, (C)) and cationic galactomannan (hereinafter, (C)) does not result in a smooth feel to the fingers without a sticky feeling during rinsing, and a soft feeling after rinsing.

Therefore, by mixing (A) and (B) in a specific ratio, the product becomes smooth and not sticky when rinsing, and by mixing (C) and (D) in a specific ratio, the product gives the hair a soft feel without making it stiff when rinsing.

The present invention provides a shampoo composition comprising the following (A) to (D), in which the mass ratio of (A) to (B) is (A)/(B) = 0.4 to 0.9, and the mass ratio of (C) to (D) is (C)/(D) = 3 to 6:
(A) an acylamino acid anionic surfactant; (B) an amphoteric surfactant; (C) a cationized cellulose (c1) having a degree of cationization of 0.6 to 1.1 meq/g and a cationized cellulose (c2) having a degree of cationization of 1.2 to 1.5 meq/g, the mass ratio of (c1) to (c2) being (c1)/(c2)=0.35 to 0.55, and (C) being 0.6 mass% or less of the total mass; (D) a cationized galactomannan.

Preferably, the shampoo composition contains component (A) as sodium lauroyl methylalanine or TEA lauroyl sarcosine, component (B) as lauramidopropyl betaine or cocamidopropyl betaine, and component (D) as guar hydroxypropyltrimonium chloride.

The present invention provides a shampoo composition that provides smooth finger combing during rinsing, is not sticky, and leaves hair feeling soft after rinsing.

The following describes an embodiment of the present invention in detail.

The shampoo composition of the present invention contains the following components (A) to (D), in which the mass ratio of (A) to (B) is (A)/(B) = 0.4 to 0.9, and the mass ratio of (C) to (D) is (C)/(D) = 3 to 6.
(A) an acylamino acid anionic surfactant; (B) an amphoteric surfactant; (C) a cationized cellulose (c1) having a degree of cationization of 0.6 to 1.1 meq/g and a cationized cellulose (c2) having a degree of cationization of 1.2 to 1.5 meq/g, the mass ratio of (c1) to (c2) being (c1)/(c2)=0.35 to 0.55, and (C) being 0.6 mass% or less of the total mass; (D) a cationized galactomannan.

The shampoo composition of the present invention is described in detail below.

(A) Acylamino acid anionic surfactant In the present invention, the acylamino acid anionic surfactant is used as a cleaning component that suppresses squeaking during washing of hair, and one or more types can be appropriately selected and used in combination. Examples of the acylamino acid anionic surfactant include taurine type, alanine type, glutamic acid type, sarcosine type, aspartic acid type, etc.

Specific examples of commercially available products include Neoscope CN-30-SF (Toho Chemical Industry Co., Ltd.), Diapon K-SF (NOF Corp.), Diapon HF-SF (NOF Corp.), Diapon K-SG (NOF Corp.), Alanon ACE (Kawaken Fine Chemicals Co., Ltd.), Alanon ALE (Kawaken Fine Chemicals Co., Ltd.), Alanon ALTA (Kawaken Fine Chemicals Co., Ltd.), Alanon AME (Kawaken Fine Chemicals Co., Ltd.), Softtilt AS-L (NOF Corp.), Softtilt AX-L (NOF Corp.), Luminoveil HS-L (NOF Corp.), Amisoft CT-12 (Ajinomoto Co., Inc.), Amirite ET-CS-12 (Ajinomoto Co., Inc.), Examples of suitable acylamino acid anionic surfactants include Aminosurfact ACDS-L (Asahi Kasei Finechem Co., Ltd.), Aminosurfact ACDP-L (Asahi Kasei Finechem Co., Ltd.), Aminosurfact ACMT-L (Asahi Kasei Finechem Co., Ltd.), Neoscope SCT-30 (Toho Chemical Industry Co., Ltd.), Neoscope SCN-35 (Toho Chemical Industry Co., Ltd.), Soypon SCE (Kawaken Fine Chemical Co., Ltd.), Soypon SLE (Kawaken Fine Chemical Co., Ltd.), Soypon SLTA (Kawaken Fine Chemical Co., Ltd.), Aminoformer FLDS-L (Asahi Kasei Finechem Co., Ltd.), and Aminoformer FCMT-L (Asahi Kasei Finechem Co., Ltd.). Among the acylamino acid anionic surfactants, preferred are alanine type and sarcosine type. More preferred are alanine type acylamino acid anionic surfactants.

The blend amount of component (A) is preferably 4 to 7% by mass of the total mass. If the blend amount is 4% by mass or more, the smoothness during rinsing is good, and if the blend amount is 7% by mass or less, the softness of the hair after rinsing is good.

(B) Amphoteric surfactant In the present invention, the amphoteric surfactant is used as a cleaning component that assists foaming. Examples of amphoteric surfactants include alkyl betaine type surfactants, alkyl amido betaine type surfactants, hydroxysulfo betaine type surfactants, amido sulfo betaine type surfactants, phospho betaine type surfactants, imidazoline type surfactants, etc., and one or more of them can be appropriately combined.

Among the above, alkyl betaine type surfactants and alkyl amido betaine type surfactants are preferred because of their excellent finger-smoothness during rinsing. Lauramidopropyl betaine and cocamidopropyl betaine are more preferred. Specific examples of commercially available products include Softazoline LPB-R (Kawaken Fine Chemicals Co., Ltd.), Softazoline CPB-R (Kawaken Fine Chemicals Co., Ltd.), Nissan Anon BDL-SF (NOF Corp.), Amphorex LB2 (Miyoshi Oil Co., Ltd.), and Amphorex CB-1 (Miyoshi Oil Co., Ltd.).

The amount of component (B) is preferably 8 to 13% by weight of the total weight. If the amount is 8% by weight or more, a smooth feel is achieved when rinsing, and if the amount is 13% by weight or less, stickiness during rinsing is eliminated.

It is preferable that the blending ratio of components (A) and (B) is (A)/(B) = 0.4 to 0.9. If the blending ratio is 0.4 or more, the stickiness during rinsing is eliminated, and if it is 0.9 or less, the hair will be soft after rinsing.

(C) Cationic cellulose In the present invention, cationic cellulose is used for the purpose of reducing the squeaky feeling during hair washing. Specific examples of cationic cellulose include diallyldimethylammonium chloride hydroxyethyl cellulose, and O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride (polyquaternium-10). Commercially available products of O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride include, for example, Leoguard GP, Leoguard MGP-P (both Lion), Catinal LC-200, Catinal HC-200 (Toho Chemical Industry Co., Ltd.), and the like. One or more types of cationic cellulose can be appropriately selected and used in combination.

It is preferable to use two or more types of cationic cellulose with different degrees of cationization as component (C). By combining two or more types of cationic cellulose with different degrees of cationization, it is possible to reduce the squeaky feeling when washing hair and obtain a soft feel for hair after rinsing. For example, a combination with a cationization degree of 0.6 to 1.1 meq/g alone will not reduce the squeaky feeling when washing hair, and a combination with a cationization degree of 1.2 to 1.5 meq/g alone will cause hair to become stiff after rinsing. For this reason, it is preferable to combine two or more types of cationic cellulose with different degrees of cationization in a specific ratio.

Specifically, a cationized cellulose having a degree of cationization of 0.6 to 1.1 meq/g (hereinafter, (c1)) is combined with a cationized cellulose having a degree of cationization of 1.2 to 1.5 meq/g (hereinafter, (c2)).

The degree of cationization was calculated from the following formula: The unit of the degree of cationization, "meq/g", indicates the number of milliequivalents of cationic groups per 1 g of sample.
Degree of cationization (meq/g)=(number of moles of cationized glucose units in 1 g of polymer compound)×1000
Mole number of cationized glucose units in 1 g of polymer compound=(Nitrogen content in polymer compound)/(Atomic weight of N)

The degree of cationization of cationic cellulose can be easily calculated if the chemical structure is clear, but even if the structure, such as the monomer ratio, is unknown, it can be calculated from the measured value of the N content by the Kjeldahl method or the like. The degree of cationization shown in this invention was calculated based on the value measured by the Nitrogen Determination Method No. 2 of the General Test Methods of the Cosmetic Raw Materials Standards, which is the Kjeldahl method.

The blending ratio of components (c1) and (c2) is preferably (c1)/(c2) = 0.35 to 0.55. If the blending ratio is 0.35 or more, hair will be soft after rinsing, and if it is 0.55 or less, hair will be smooth when rinsing.

Furthermore, it is preferable that the total amount of (C) consisting of (c1) and (c2) is 0.6% by mass or less of the total mass. If it is 0.6% by mass or less, the softness of the hair after rinsing is good.

(D) Cationic Galactomannan In the present invention, the cationic galactomannan is used for the purpose of imparting softness to hair after rinsing, and one or more types of cationic galactomannan may be appropriately selected and used in combination. Examples of cationic galactomannan include cationic guar gum, cationic tara gum, cationic locust bean gum, and cationic fenugreek gum.

From the viewpoint of smoothness during rinsing, guar hydroxypropyltrimonium chloride, which is a cationic guar gum, is preferred. Specific examples of commercially available products include Catinal CG-100S (Toho Chemical Industry Co., Ltd.) and JAGUAR EXCEL (Solvay Nicca Co., Ltd.).

The amount of component (D) is preferably 0.15% by mass or less of the total mass. If the amount is 0.15% by mass or less, the softness of the hair after rinsing is good.

The blending ratio of the components (C) and (D) is preferably (C)/(D)=3-6.
If the blending ratio is 3 or more, the softness of the hair after rinsing is good, and if it is 6 or less, the smoothness during rinsing is good.

In addition to the essential components described above, the hair cleansing composition of the present invention can contain any component normally used in cosmetics, as necessary, as long as the effect of the present invention is not impaired. These components include anionic surfactants, cationic surfactants, nonionic surfactants, pearlescent agents, oils, UV absorbers, preservatives, moisturizers, polymers, amino acid derivatives, sugar derivatives, fragrances, water, alcohol, thickeners, colorants, sequestering agents, antioxidants, medicines, etc.

The hair cleansing composition of the present invention may be in any form, including a viscous liquid, cream, gel, solid, or powder, but is preferably in the form of a viscous liquid having a viscosity of 100 to 7,000 mPa·s at 30°C.

The present invention will be explained in detail below using examples, but the technical scope of the present invention is not limited to these examples. Prior to the examples, the test methods and evaluation methods used in each example and comparative example will be explained.

A hair cleanser having the composition described below was prepared by a conventional method. The pH was also adjusted using an appropriate pH adjuster such as citric acid or potassium hydroxide. When these hair cleansers were used, the degree of stickiness during rinsing, the smoothness during rinsing, and the softness of the hair after rinsing were investigated, and the results are shown in the table. All units in the table are mass %.

<Formulation example> (mass%)
Sodium lauroyl methylalanine 5.0%
Lauramidopropyl betaine 10.0%
Polyquaternium-10 (charge density: 1.0 meq/g) 0.1%
Polyquaternium-10 (charge density: 1.3 meq/g) 0.2%
Guar hydroxypropyltrimonium chloride 0.1%
PPG-2 cocamide 1.0%
BG 0.5%
Coconut oil fatty acid PEG-7 glyceryl 1.0%
Water 82.1%
Total (w/w) 100.0%

<Slippery feeling test during rinsing>
Ten panelists applied 3 g of the hair cleanser to a wig (human black hair (100% root-aligned, 10 g x 30 cm), manufacturer's model number: BS-B3A), massaged it in, then rinsed it off and evaluated how little stickiness there was.

<Smoothness test when rinsing>
Ten panelists applied 3 g of the hair cleanser to a wig (human black hair (100% root-aligned, 10 g x 30 cm), manufacturer's model number: BS-B3A), massaged it in, rinsed it off, and evaluated the smoothness of the hair when run through it.

<Hair softness test after rinsing>
Ten panelists applied 3g of the hair cleanser to a wig (human black hair (100% root-aligned, 10g x 30cm), manufacturer's model number: BS-B3A), massaged it in, rinsed it off, and after thoroughly draining the water, touched the wet hair to evaluate its softness.

The evaluation criteria for the above three tests were set as follows:
◎: 8 to 10 people answered that it was good.
○: 5 to 7 people answered that it was good.
△: 3 to 4 people answered that it was good.
×: Fewer than two people answered "good."

(Examples 1 to 9) (Comparative Examples 1 to 13)
Shampoo compositions having the formulations shown in Tables 1 and 2 were prepared in a conventional manner and evaluated by carrying out the above-mentioned various tests. The results are also shown in Tables 1 and 2.

As is clear from Tables 1 and 2, the shampoo compositions of Examples 1 to 9 using the components of the present invention all exhibited superior performance compared to the shampoo compositions of Comparative Examples 1 to 13.

Other formulation examples of the shampoo composition of the present invention are given below as working examples. The shampoo compositions of these working examples were also examined for each of the above-mentioned characteristics, such as the lack of stickiness during rinsing, the smoothness during rinsing, and the softness of hair after rinsing, and all of the working examples were found to have excellent properties and were favorable.

Example 10 Shampoo (mass%)
(1) Lauramidopropyl betaine 10.0
(2) Sodium lauroyl methylalanine 5.0
(3) Polyquaternium-10 (charge density: 1.0 meq/g) 0.1
(4) Polyquaternium-10 (charge density: 1.3 meq/g) 0.2
(5) Guar hydroxypropyltrimonium chloride 0.1
(6) Coconut oil fatty acid PEG-7 glyceryl 0.1
(7) Sodium chloride 0.1
(8) PPG-2 cocamide 0.2
(9) Polyquaternium-7 1.0
(10) Glycerin 1.0
(11) Dianthus pictus seed extract 0.1
(12) Sake lees extract 0.1
(13) Diethyl sebacate 0.01
(14) Ceteareth-60 myristyl glycol 0.5
(15) Rice bran extract 0.1
(16) Rice germ oil 0.1
(17) Aloe vera leaf extract 0.1
(18) (Dihydroxymethylsilylpropoxy)
Hydroxypropyl hydrolyzed silk 0.1
(19) Saccharomyces/Rice bran fermented liquid extract 0.1
(20) Apricot kernel oil 0.1
(21) Rosehip oil 0.1
(22) Rice bran oil 0.1
(23) Tea flower extract 0.1
(24) Camellia japonica seed extract 0.1
(25) Black Lavender Extract 0.1
(26) Sapindus mukorossi extract 0.1
(27) Soybean seed extract 0.1
(28) Purple jasmine fruit extract 0.1
(29) Tea seed oil 0.1
(30) Citric acid 0.5
(31) Sodium benzoate 0.5
(32) EDTA-2Na 0.1
(33) Caramel 0.2
(34) Fragrance 0.5
(35) BG 1.0
(36) Purified water, balance

Example 11 Shampoo (mass%)
(1) Cocamidopropyl betaine 9.0
(2) Lauroyl Sarcosine TEA 2.5
(3) Sodium lauroyl methylalanine 2.5
(4) Polyquaternium-10 (charge density: 1.0 meq/g) 0.1
(5) Polyquaternium-10 (charge density: 1.3 meq/g) 0.2
(6) Guar hydroxypropyltrimonium chloride 0.1
(7) Cocamide methyl MEA 1.0
(8) Ceteareth-60 myristyl glycol 0.5
(9) Sodium chloride 0.1
(9) Polyquaternium-7 1.2
(10) Polyquaternium-49 0.1
(11) PEG-7 glyceryl coconut oil fatty acid 1.0
(12) PPG-2 cocamide 2.0
(13) Tornare 1.0
(14) Sunflower seed oil 0.1
(15) Saccharomyces/Sunflower sprout ferment extract 0.1
(16) Sunflower Seed Extract 0.1
(17) Sunflower Flower Extract 0.1
(18) Sunflower seed oil fatty acid phytosteryl 0.1
(19) Pomegranate peel extract 0.1
(20) Ginger rhizome extract 0.1
(21) Sunflower Leaf/Stem Extract 0.1
(22) Menthol 0.3
(23) Acetylglucosamine 0.05
(24) Citric acid 0.4
(25) Sodium benzoate 0.5
(26) EDTA-2Na 0.1
(27) Caramel 0.2
(28) Fragrance 0.5
(29) Purified water, balance

Example 12 Shampoo (mass%)
(1) Lauramidopropyl betaine 7.0
(2) Sodium cocoamphoacetate 2.0
(3) Sodium lauroyl methylalanine 5.0
(4) Polyquaternium-10 (charge density: 1.0 meq/g) 0.1
(5) Polyquaternium-10 (charge density: 1.3 meq/g) 0.2
(6) Guar hydroxypropyltrimonium chloride 0.1
(7) PPG-2 cocamide 1.0
(8) Ceteareth-60 myristyl glycol 0.5
(9) Polyquaternium-49 0.1
(10) Polyquaternium-107 0.1
(11) Yogurt liquid (milk) 0.1
(12) Seaweed extract 0.1
(13) Red algae extract 0.1
(14) Lactoferrin (milk) 0.1
(15) Glycyrrhizic acid 2K 0.1
(16) Seawater 0.1
(17) Water-soluble collagen 0.1
(18) Sea silt 0.1
(19) Hydrolyzed collagen 0.1
(20) Sodium hyaluronate 0.1
(21) Silk extract 0.1
(22) Lactose (milk) 0.1
(23) Brown algae extract 0.1
(24) Green algae extract 0.1
(25) Citric acid 0.5
(26) Methylparaben 0.2
(27) Sodium benzoate 0.3
(28) EDTA-2Na 0.1
(29) Caramel 0.2
(30) Fragrance 0.5
(31) Purified water, balance

Example 13 Shampoo (mass%)
(1) Cocamidopropyl betaine 6.0
(2) Lauramidopropyl betaine 4.0
(3) TEA-Cocoyl Glutamate 2.5
(4) Sodium lauroyl methylalanine 2.5
(5) Polyquaternium-10 (charge density: 1.0 meq/g) 0.1
(6) Polyquaternium-10 (charge density: 1.3 meq/g) 0.2
(7) Guar hydroxypropyltrimonium chloride 0.1
(8) Cocamide methyl MEA 1.0
(9) Ceteareth-60 myristyl glycol 0.5
(10) Hydrolyzed silk 0.1
(11) Serine 0.01
(12) Proline 0.01
(13) Sodium glutamate 0.01
(14) Arginine 0.01
(15) Alanine 0.01
(16) Di(phytosteryl/octyldodecyl) lauroyl glutamate 0.01
(17) Diethyl sebacate 0.1
(18) Cocoyl arginine ethyl PCA 0.1
(19) (Glycerylamide ethyl methacrylate
/stearyl methacrylate) copolymer 0.1
(20) Saccharomyces/Rice bran fermented liquid extract 0.1
(21) Hydrolyzed collagen 0.1
(22) (Dihydroxymethylsilylpropoxy)
Hydroxypropyl hydrolyzed silk 0.1
(23) Polyquaternium-107 0.1
(24) (Hydrolyzed Silk/PG-Propylmethylsilanediol)
Crosspolymer 0.1
(25) Asai palm fruit oil 0.1
(26) Argania spinosa kernel oil 0.1
(27) Jojoba seed oil 0.1
(28) Macadamia seed oil 0.1
(29) Crab rose fruit oil 0.1
(30) Hydrolyzed conchiolin 0.1
(31) Citric acid 0.4
(32) Sodium benzoate 0.5
(33) EDTA-2Na 0.1
(34) Caramel 0.2
(35) Fragrance 0.5
(36) Purified water, balance

Claims (1)

A shampoo composition comprising the following (A) to (D), in which the mass ratio of (A) to (B) is (A)/(B)=0.4 to 0.9, and the mass ratio of (C) to (D) is (C)/(D)=3 to 6. (A) Sodium lauroyl methylalanine and/or TEA lauroyl sarcosine
(B) Lauramidopropyl betaine and/or cocamidopropyl betaine
(C) A composition comprising a cationized cellulose (c1) having a degree of cationization of 0.6 to 1.1 meq/g and a cationized cellulose (c2) having a degree of cationization of 1.2 to 1.5 meq/g, wherein the mass ratio of (c1) to (c2) is (c1)/(c2)=0.35 to 0.55, and (C) is 0.6 mass% or less of the total mass. (D) Guar hydroxypropyltrimonium chloride