JP2009263290A - Skin detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin detergent composition excellent in foaming property and foam quality, and having a good stop feeling property on rinsing. <P>SOLUTION: This skin detergent composition contains the following components (A) to (D) and water. (A) A polyoxyethylene alkyl ether sulfate. (B) A polyoxyethylene alkyl ether carboxylic acid or its salt. (C) A cationic group-containing polymer having ≥4.5 meq/g cation electric charge density. (D) A copolymer of acrylic acid and/or acrylamide with dimethyldiallyl ammonium chloride and containing the ≥40 mass% total of the acrylic acid and/or acrylamide. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a skin cleansing composition.

Various performances of the skin cleanser used to clean the face and the whole body have good foaming and excellent usability, and there is a feeling of friction resistance (stop feeling) as a feeling when rinsing. Desired.
Conventionally, a skin cleanser composition based on polyoxyethylene alkyl ether sulfate, which is a surfactant widely used in this field, has good foaming, but has a problem that it feels slimy forever during rinsing. there were.

In Patent Documents 1 and 2, in personal cleansing compositions mainly composed of water-soluble surfactants such as polyoxyethylene alkyl ether sulfates, water-insoluble oils such as polyisobutene and silicone oil are added to improve upon rinsing. To provide a modified rinsfeel.
However, when an oily component is added to the skin cleansing composition in this way, particularly when used for washing the whole body, the stop feeling at the time of rinsing is not sufficient, or the residual feeling on the skin and oil after washing off. Due to its strong nature, it is sticky and a refreshing feel cannot be obtained. In addition, when a liquid oily component is added, there is a problem that the amount of foam is impaired.

Patent Document 3 and Patent Document 4 describe a cleaning composition containing a specific surfactant and a cationic polymer. Such a cationic polymer is used as a conditioning agent for reducing squeaky sensation in hair cleansing agents, and improves fingering during rinsing. Further, skin cleansing agents are also used as conditioning agents that moisturize the skin. However, although these detergent compositions have good foaming in skin cleaning applications, they are not fully satisfactory from the viewpoint of stop feeling during rinsing.
Special table 2001-513539 gazette Special table 2001-513538 gazette JP-A-2-42013 JP-A-9-165598

  An object of the present invention is to provide a skin cleanser composition that is excellent in foaming properties and foam quality and has good stop feeling at the time of rinsing.

  The present inventors have found that a skin cleansing composition that solves the above problems can be obtained by using the components (A) to (D) described later in combination.

The present invention includes the following components (A), (B), (C) and (D):
(A) polyoxyethylene alkyl ether sulfate,
(B) polyoxyethylene alkyl ether carboxylic acid or a salt thereof,
(C) a cationic group-containing polymer having a cationic charge density of 4.5 meq / g or more,
(D) a copolymer of acrylic acid and / or acrylamide and dimethyldiallylammonium chloride, comprising a total of 40% by mass or more of acrylic acid and / or acrylamide,
In addition, a skin cleansing composition containing water is provided.

  The skin cleanser composition of the present invention is excellent in foaming and foam amount, easily expands foam, and has good stop feeling at the time of rinsing.

  As a polyoxyethylene alkyl ether sulfate of the component (A) used by this invention, what is represented by a following formula is preferable.

(In the formula, R ¹ represents an alkyl group or alkenyl group having 8 to 20 carbon atoms, m represents an average number of 0.5 to 10, and X represents an alkali metal, alkaline earth metal, ammonium or organic ammonium. Indicate)

In the formula, R ¹ is particularly preferably an alkyl group having 10 to 18 carbon atoms. Moreover, although the average added mole number m of ethylene oxide is 0.5-10, it is preferable that it is 0.5-6, especially 1-4.
X represents alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine and triethanolamine; basic such as arginine and lysine Examples thereof include cations derived from amino acids.

  One or more types of component (A) can be used, and 1 to 20% by mass, particularly 3 to 13% by mass in the total composition is the speed of foaming, the amount of foam and the stop feeling during rinsing. It is preferable because of its excellent properties.

  As a polyoxyethylene alkyl ether carboxylic acid or its salt of a component (B), what is represented by a following formula is preferable.

(In the formula, R ² represents an alkyl group or alkenyl group having 8 to 20 carbon atoms, n represents an average number of 0.5 to 10, and X represents a hydrogen atom, an alkali metal, an alkaline earth metal, or ammonium. Or organic ammonium)

In the formula, R ² is particularly preferably an alkyl group having 10 to 18 carbon atoms. Further, the average added mole number n of ethylene oxide is 0.5 to 10, but 1 to 6 is particularly preferable.
X represents alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine and triethanolamine; basic such as arginine and lysine Examples thereof include cations derived from amino acids.

  One or more types of component (B) can be used, and the total composition contains 1 to 20% by mass, particularly 1.5 to 10% by mass. Since it is excellent in property, it is preferable.

In the present invention, the mass ratio of the components (A) and (B) is (A) :( B) = 85: 15-25: 75, particularly 75: 25-35: 65, Since it is excellent in the amount of foam, foam quality, and stop feeling at the time of rinse, it is preferable.
Further, the total content of the components (A) and (B) in the total composition is preferably 5 to 25% by mass, particularly 7.5 to 20% by mass, because it is excellent in foaming, foam amount and foam quality. .

The cationic group-containing polymer of component (C) used in the present invention has a cationic charge density of 4.5 meq / g or more.
Here, the cation charge density refers to the equivalent number (meq / g) of cation charge in the monomer unit constituting the polymer.

  Examples of the cation group-containing polymer having a cation charge density of 4.5 meq / g or more include dimethyldiallylammonium chloride homopolymer; dimethyldiallylammonium chloride and (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylamide A copolymer with other monomers; polymethacryloyloxyethyltrimethylammonium chloride and the like.

  More specifically, a homopolymer of dimethyldiallylammonium chloride (Mercoat 100; manufactured by Ondeonalco: charge density 6.2 meq / g), a copolymer of dimethyldiallylammonium chloride and acrylic acid (Mercoat 295; manufactured by Ondeonalco: charged) Density 6.0 meq / g), copolymer of dimethyldiallylammonium chloride and acrylic acid (Mercoat 280; manufactured by Ondealco: charge density 5.0 meq / g), polymethacryloyloxyethyltrimethylammonium chloride chloride (produced by Kao: charge) Density 4.8 meq / g).

  The cationic charge density of the cationic group-containing polymer is 4.5 meq / g or more, preferably 4.5 to 7, more preferably 5 to 7, and particularly preferably 5.5 to 6.5. If it has a high cationic charge density in this range, the stop feeling at the time of rinsing the cleaning composition is good. In particular, a copolymer having a weight ratio of dimethyldiallylammonium chloride and acrylic acid of 97: 3 (mercoat 295; manufactured by Ondeonalco: charge density 6.0 meq / g) is preferable in terms of stop feeling at the time of rinsing. .

  As the polymer of component (C), a homopolymer of dimethyldiallylammonium chloride and a copolymer of dimethyldiallylammonium chloride and acrylic acid are particularly preferable from the viewpoint of corrosion resistance of production equipment.

  As the component (C), one or more kinds can be used, and 0.05 to 2% by mass, further 0.075 to 1.5% by mass, particularly 0.1 to 0.8% by mass in the total composition. This is preferable because it provides excellent stop feeling during rinsing.

Component (D) used in the present invention is other than the polymer of component (C), and is a copolymer of acrylic acid and / or acrylamide and dimethyldiallylammonium chloride, which is acrylic acid and / or acrylamide. Is a copolymer containing 40% by mass or more in total.
In the copolymer, acrylic acid and / or acrylamide is contained in a total amount of 40% by mass or more, preferably 40 to 70% by mass, more preferably 45 to 60% by mass.

  As such a copolymer, for example, a copolymer having a weight ratio of dimethyldiallylammonium chloride / acrylamide of 50:50 (Mercoat 550, Mercoat 2200, manufactured by Ondealco), acrylic acid / dimethyldiallylammonium chloride / acrylamide. A copolymer having a weight ratio of 25:50:25 (Mercoat Plus 3330, manufactured by Ondealalco), and a copolymer having a weight ratio of acrylic acid / dimethyldiallylammonium chloride / acrylamide of 17:45:38 (Mercoat Plus). 3331, manufactured by Ondeonalco), a copolymer having a weight ratio of acrylic acid / dimethyldiallylammonium chloride / acrylamide of 55.2: 30: 14.8 (Mercoat 3333, manufactured by Ondeonalco) can be used. That.

  One or more components (D) can be used, and 0.02 to 0.5% by mass, especially 0.035 to 0.3% by mass in the total composition improves foaming and foam quality. In addition, it is preferable because it has excellent stop feeling at the time of rinsing.

In the present invention, the mass ratio of the components (C) and (D) is (C) :( D) = 60: 40 to 95: 5, in particular 75:25 to 90:10. This is preferable because the amount of foam is improved and the stop feeling at the time of rinsing is excellent.
Further, the total content of the components (C) and (D) in the total composition is 0.3 to 2.2% by mass, particularly 0.4 to 1.6% by mass. While improving, it is excellent in the stop feeling at the time of a rinse, and it is preferable.

  The skin cleansing composition of the present invention may further contain (E) an inorganic salt or an organic acid salt having 6 or less carbon atoms, if necessary. Examples of inorganic salts include salts of alkali metals, alkaline earth metals, halogens, sulfuric acid, sulfurous acid, phosphoric acid, and the like. Specifically, sodium chloride, potassium chloride, sodium bromide, magnesium chloride, sodium sulfate, Examples thereof include potassium sulfate, sodium dihydrogen phosphate, and disodium hydrogen phosphate. In addition to acetic acid, examples of organic acid salts include salts of hydroxy acids such as lactic acid, malic acid, citric acid, and succinic acid, polyvalent acids, and alkali metals. Of these, sodium chloride, sodium malate, sodium lactate, sodium citrate, and sodium succinate are preferred.

  As the component (E), one or more components can be used as long as they do not interfere with the foamability and foam quality which are the effects of the present invention, and the total composition is 0.5 to 10% by mass, and further 0.5 to 6% by mass is contained because the complex formed by the three components (A), (B) and (C) is easily dissolved, the stop feeling is improved, and the liquid appearance (transparency) is also improved. preferable.

In the present invention, the mass ratio of the components (A) and (B) is preferably (A) :( B) = 85: 15 to 25:75. In this case, the component (A), When the complex formed by the three components (B) and (C) is easily dissolved, and the value of (C) / ((A) + (B)) is 0.025 to 0.08, the complex Becomes easier to dissolve.
Particularly, in the relationship of (E) an inorganic salt or an organic acid salt having 6 or less carbon atoms and a complex formed by the three components (A), (B) and (C), (E) / ((A) + The value of (B) + (C)) is more preferably from 0.19 to 0.34, since the solubility is enhanced and stability and pearly luster are easily developed. The dissolved complex is deposited in the dilution process and adsorbs to the skin, so that the sliminess disappears quickly and the stop feeling is further improved, which is preferable.

  The skin cleansing composition of the present invention can also contain other surfactants used in ordinary cleaning compositions in addition to the above-described components as long as the effects of the present invention are not hindered. Specifically, for example, alkylbenzene sulfonate, α-olefin sulfonate, alkane sulfonate, α-sulfo fatty acid ester salt, acylated amino acid salt, monoalkyl phosphate ester salt, acyl-L-glutamate, etc. Nonionic surfactants such as polyoxyalkylene alkyl ethers, alkyl glucosides, fatty acid mono- or dialkanolamides, polyoxyalkylene type block polymers, glycerin fatty acid esters, alkyl glyceryl ethers; quaternary ammonium salts, etc. And cationic surfactants such as carbobetaines, sulfobetaines, imidazolinium betaines, hydroxybetaines, fatty acid amide betaines, and the like.

The skin cleanser composition of the present invention can further contain various components that are usually used in a cleanser composition, if necessary. Specifically, for example, moisturizers such as propylene glycol, dipropylene glycol, glycerin and sorbitol; solvents such as ethanol; viscosity modifiers such as methylcellulose; bactericides such as triclosan and trichlorocarban; potassium glycyrrhizinate, tocopherol acetate and the like Anti-inflammatory agents; methylparaben, butylparaben, phenoxyethanol, benzoate and other preservatives; and other dyes, fragrances, ultraviolet absorbers, antioxidants, and the like.
Moreover, in this invention, it is preferable to contain 40-90 mass% of water in the whole composition.

  The skin cleansing composition of the present invention is produced by weighing the blended components by a conventional method and mixing them in an arbitrary order with water or an aqueous medium mainly containing water and containing other water-soluble solvents such as alcohol. can do. It can be applied as body shampoo, face wash, makeup remover, etc.

The skin cleanser composition of the present invention is adjusted to be weakly acidic, has little irritation to the skin, has good foaming at the time of washing without impairing excellent cleaning power, and has a stop feeling at the time of rinsing. It is preferable because it is excellent in use feeling.
The weak acid refers to a pH of 4.5 to 7, preferably 4.5 to 6.5. In the present invention, the pH indicates a value at 25 ° C. when diluted 20 times by mass with ion-exchanged water.

Examples 1-8, Comparative Examples 1-6
Skin cleansing compositions having the compositions shown in Table 1 and Table 2 were produced, and the speed until foaming, the foaming, the amount of foam and the ease of foam expansion were evaluated. The results are shown in Table 1 and Table 2 together.
In addition, in an Example, the polymer compounding quantity described in each table | surface shows the value as polymer solid content.

(Production method)
The components shown in the table were weighed and added to ion-exchanged water and stirred sufficiently at 50 ° C. to obtain a skin cleansing composition. An appropriate amount of sodium hydroxide was added to adjust the pH of the 20-fold diluted solution to be slightly acidic. Here, the pH was measured using a pH meter (manufactured by Horiba, model number F-22) after diluting the composition 20 times with ion-exchanged water to obtain a 5% by mass aqueous solution.

(Evaluation methods)
(1) Speed until feeling of stop feeling at the time of rinsing (forearm washing evaluation):
After taking 1.0 g of each cleaning composition in one hand, diluting with tap water and bubbling, both arms (from the elbow) were washed and rinsed with tap water. At that time, rinsing was performed while rubbing both forearms, and the number of rubbing until a stop feeling was felt was measured. The measurement results were ranked according to the following evaluation criteria.
5: The number of rubbing is 2 or less.
4; Number of rubbing is 3 to 5 times.
3; Number of rubbing is 6 times or more and 8 times.
2; Number of rubbing is 9 times or more and 11 times.
1: The number of rubbing is 12 times or more.

(2) Foaming:
Ten professional evaluators took 1.0 g of each cleaning composition in one hand, diluted with tap water, and observed the ease of foaming in the initial stage. The measurement results were ranked according to the following evaluation criteria.
5: Eight or more people answered that it was easy to bubble.
4; 6 to 7 people answered that it was easy to foam.
3; 3 to 5 people answered that it was easy to foam.
2: One to two people answered that it was easy to foam.
1; 0 people answered that it was easy to foam.

(3) Foam amount:
Ten professional evaluators took 1.0 g of each cleaning composition in one hand, diluted with tap water, and observed the foam volume after foaming for about 30 seconds. The measurement results were ranked according to the following evaluation criteria.
5; More than 8 people answered that the bubbles had a volume.
4; 6 to 7 people answered that the bubbles had a volume.
3; 3 to 5 people replied that the bubbles had a volume.
2: One to two people answered that the bubbles had a volume.
1; 0 people answered that the bubbles had a volume.

(4) Ease of foam expansion:
Ten professional evaluators took 1.0 g of each cleaning composition in one hand, diluted with tap water, and observed the ease of foam expansion after foaming for about 30 seconds. The measurement results were ranked according to the following evaluation criteria.
5; More than 8 people answered that bubbles are easy to stretch.
4; 6 to 7 people replied that bubbles are easy to stretch.
3; 3 to 5 people replied that bubbles are easy to stretch.
2: One to two people answered that the bubbles are easy to stretch.
1; 0 people answered that bubbles are easy to stretch.

Example 9
A body shampoo having the following composition was produced in the same manner as in Examples 1-8.

Example 10
A body shampoo having the following composition was produced in the same manner as in Examples 1-8.

  Each of the body shampoos obtained in Examples 9 and 10 has good stop feeling at the time of rinsing, and is excellent in foaming, the amount of foam, and the ease of foam expansion.

Claims (3)

The following components (A), (B), (C) and (D):
(A) polyoxyethylene alkyl ether sulfate,
(B) polyoxyethylene alkyl ether carboxylic acid or a salt thereof,
(C) a cationic group-containing polymer having a cationic charge density of 4.5 meq / g or more,
(D) a copolymer of acrylic acid and / or acrylamide and dimethyldiallylammonium chloride, comprising a total of 40% by mass or more of acrylic acid and / or acrylamide,
And a skin cleansing composition containing water.   The mass ratio of components (C) and (D) is (C) :( D) = 60: 40 to 95: 5, and the total content of components (C) and (D) in the total composition is The skin cleanser composition according to claim 1, which is 0.3 to 2% by mass.   The skin cleansing composition according to claim 1 or 2, which has a pH of 4.5 to 7 when diluted 20 times by mass with ion-exchanged water.