JP5562531B2 - Skin cleanser composition - Google Patents

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.

In Patent Document 1, an anionic surfactant having a sulfate residue, a hair cleanser containing a higher alcohol having 10 to 14 carbon atoms and a cationic polymer has good foaming and slippery foam quality during hair washing. It is described that it has excellent usability.
However, conventionally, polyoxyethylene alkyl ether sulfate, which is a surfactant widely used in this field, has a problem that when it is used as a main agent in a skin cleansing composition, it feels slick and lingering continuously.

Patent Documents 2 and 3 include a personal cleansing composition based on a water-soluble surfactant such as polyoxyethylene alkyl ether sulfate, which is improved at the time of rinsing by adding a water-insoluble oil such as polyisobutene and silicone oil. 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. There was also a problem that the amount of foam was impaired.
JP 2003-212733 A Special table 2001-513539 gazette Special table 2001-513538 gazette

  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 (F) described later in combination.

The present invention includes the following components (A), (B), (C), (D), (E) and (F):
(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) an inorganic salt or an organic acid salt having 6 or less carbon atoms,
(E) a polyoxyethylene alkyl ether type nonionic surfactant,
(F) one or more selected from higher fatty acids, higher alcohols and alkyl glyceryl ethers,
In addition, a skin cleansing composition containing water is provided.

  The skin cleansing composition of the present invention has fast foaming, excellent foam amount and foam quality, and good stop feeling during 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 foaming speed, the amount of foam, and the stop feeling during rinsing. Since it is excellent in property, it is preferable.

  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 an inorganic salt or an organic acid salt having 6 or less carbon atoms. 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 (D), 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 (D) an inorganic salt or an organic acid salt having 6 or less carbon atoms and a complex formed by three components (A), (B) and (C), (D) / ((A) + The value of (B) + (C)) is more preferably from 0.19 to 0.34 because the solubility is increased 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.

  As a polyoxyethylene alkyl ether type nonionic surfactant of the component (E) used by this invention, what is represented by a following formula is preferable.

(In the formula, R ³ represents an alkyl or alkenyl group having 8 to 20 carbon atoms, and p represents an average of 3 to 30)

In the formula, R ³ is particularly preferably an alkyl group having 10 to 18 carbon atoms. Moreover, the average added mole number p of ethylene oxide is 3-30, but 10-20 is particularly preferable.
Moreover, 10-20 are preferable and, as for HLB (Griffin) of the polyoxyethylene alkyl ether of a component (E), 13-18 are more preferable.

  More specifically, polyoxyethylene (16) lauryl ether (HLB14.5; Emulgen 116, manufactured by Kao Corporation), polyoxyethylene (10) cetyl ether (HLB13.5; BC-10TX, manufactured by Nikko Chemical Corporation), Polyoxyethylene (15) cetyl ether (HLB15.5; BC-15TX, manufactured by Nikko Chemical Co.), polyoxyethylene (20) stearyl ether (HLB18; BS-20, manufactured by Nikko Chemical Co.), polyoxyethylene (15) Examples include alkyl (sec-C12-C14) ether (HLB15.3; Softanol 150, manufactured by Nippon Shokubai Co., Ltd.).

  One or more types of component (E) can be used, and the total composition contains 0.25 to 5% by mass, particularly 0.5 to 3.5% by mass. This is preferable because it provides excellent stop feeling during rinsing.

The component (F) used in the present invention is selected from higher fatty acids, higher alcohols and alkyl glyceryl ethers.
The higher fatty acid may be linear or branched, for example, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, coconut oil fatty acid, isostearic acid, isopalmitic acid, etc. And those having 10 to 18 carbon atoms, particularly those having 12 to 15 carbon atoms are preferred.
Further, the higher alcohol may be either linear or branched, and examples thereof include cetyl alcohol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, glycerin, myristyl alcohol, behenyl alcohol, cetostearyl alcohol and the like. And those having 10 to 18 carbon atoms, particularly those having 12 to 15 carbon atoms are preferred.

  Moreover, as alkyl glyceryl ether, what has a C4-C18, especially C6-C10 linear or branched alkyl group or alkenyl group is preferable. Furthermore, 2-ethylhexyl glyceryl ether is preferable.

  By containing higher fatty acids and higher alcohols, foaming and foam texture (fineness of foam and foam elasticity) are improved. Alkyl glyceryl ether has a remarkable effect in terms of foamability, foam amount, and ease of foam expansion.

  Moreover, as will be described later, the skin cleansing composition of the present invention preferably exhibits a pH of weakly acidic to neutral range. In such a composition, the higher fatty acid is contained in the composition as a lipid (free fatty acid), not as a fatty acid soap as a salt. It is done.

One or more types of component (F) can be used, and higher fatty acids and higher alcohols, higher fatty acids or higher alcohols and alkyl glyceryl ethers can also be used in combination. In particular, it is preferable to use a combination of lauric acid and myristyl alcohol in terms of improving the fineness of the foam and the elasticity of the foam. In addition, by combining lauric acid or myristyl alcohol and alkyl glyceryl ether, it is possible to increase the amount of foam, impart a foam quality that is easy to stretch, and further improve the foam performance while also having a good foam extinguishing effect. Is preferable.
The higher fatty acid and higher alcohol are each preferably contained in the total composition in an amount of 0.1 to 3.5% by mass, particularly 0.2 to 2.5% by mass. The alkyl glyceryl ether is preferably contained in the total composition in an amount of 0.1 to 3.5% by mass, particularly 0.2 to 2.5% by mass.

  As mentioned above, in order to dissolve the complex formed by the three components (A), (B), and (C), the stop feeling during rinsing is improved by mixing component (D). Can do. However, when the stop feeling at the time of rinsing is improved in this way, the foaming, the amount of foam, and the foam quality at the time of washing may deteriorate. For this reason, foam quality can be further improved by combining the specific nonionic surfactant of a component (E), and a component (F). In particular, when the mass ratio of the components (E) and (F) is (E) :( F) = 80: 20 to 40:60, in particular 75:25 to 55:45, foaming at the time of washing, This is preferable because the effect of improving the amount of foam and foam quality is high. The total content of components (E) and (F) in the total composition is 0.25 to 8.5% by mass, particularly 0.35 to 8.5% by mass, and further 0.7 to 6% by mass. It 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 alkyl glucosides, fatty acid mono- or dialkanolamides, polyoxyalkylene type block polymers, glycerin fatty acid esters; cationic surfactants such as quaternary ammonium salts; carbobetaines, Examples include amphoteric surfactants such as sulfobetaines, imidazolinium betaines, hydroxybetaines, and fatty acid amide betaines.

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, humectants 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 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 1-7, Comparative Examples 1-12
Skin cleansing compositions having the compositions shown in Table 1 and Table 2 were produced, and the liquid appearance, the speed to feel the stop feeling during rinsing, foaming, fineness of foam and foam elasticity 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 method)
(1) Liquid appearance:
The appearance (transparency) when each cleaning composition was put in a glass bottle was visually evaluated. The evaluation results were ranked according to the following criteria.
A: There is a sense of transparency.
B: There is little transparency.
C: There is no sense of transparency.

(2) Speed to feel a stop feeling when 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.

(3) 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.

(4) Fineness of foam:
Ten professional evaluators took 1.0 g of each cleaning composition in one hand, diluted with tap water, and observed the fineness of the foam 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 were fine.
4; 6 to 7 people answered that the bubbles were fine.
3; 3 to 5 people answered that the bubbles were fine.
2: One or two people answered that the bubbles were fine.
1; 0 people answered that the bubbles were fine.

(5) Elasticity of bubbles:
Ten professional evaluators took 1.0 g of each cleaning composition in one hand, diluted with tap water, and observed the elasticity of the foam 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 are elastic.
4; 6 to 7 people answered that the bubbles are elastic.
3; 3 to 5 people answered that the bubbles are elastic.
2: One to two people answered that the bubbles are elastic.
1; 0 people answered that the bubbles are elastic.

Examples 8-12, Comparative Examples 13-19
In the same manner as in Examples 1 to 7, skin cleanser compositions having the compositions shown in Table 3 were produced, and the liquid appearance, the speed to feel a stop feeling during rinsing and foaming were evaluated. Also, the amount of foam was evaluated. The results are also shown in Table 3.

(Evaluation method)
(1) 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.

Example 13
A body shampoo having the following composition was produced in the same manner as in Examples 1-7.

Example 14
A body shampoo having the following composition was produced in the same manner as in Examples 1-7.

Example 15
A body shampoo having the following composition was produced in the same manner as in Examples 1-7.

  All of the body shampoos obtained in Examples 13 to 15 have good stop feeling at the time of rinsing, and are excellent in foaming, fineness of foam, and elasticity of foam. The liquid appearance (pearl appearance) is also good.

Claims (6)

The following components (A), (B), (C), (D), (E) and (F):
(A) 1-20% by mass of polyoxyethylene alkyl ether sulfate,
(B) 1-20% by mass of polyoxyethylene alkyl ether carboxylic acid or salt thereof,
(C) dimethyldiallylammonium chloride homopolymer chromatography, selected from copolymers and polyvinylidene chloride methacryloyloxyethyl trimethylammonium chloride-dimethyl-diallyl ammonium chloride and acrylic acid, containing cationic groups cationic charge density of more than 4.5 meq / g 0.05 to 2% by weight of polymer,
(D) 0.5 to 10% by mass of an inorganic salt or an organic acid salt having 6 or less carbon atoms,
(E) Polyoxyethylene alkyl ether type nonionic surfactant 0.25 to 5% by mass,
(F) a higher fatty acid having 10 to 18 carbon atoms, 1 or more 0.1 to 3.5 wt% selected from higher alcohols and alkyl glyceryl ether having 10 to 18 carbon atoms,
And a skin cleansing composition containing water.   The mass ratio of components (E) and (F) is (E) :( F) = 80: 20-40: 60, and the total content of components (E) and (F) in the total composition is The skin cleanser composition according to claim 1, which is 0.35 to 8.5% by mass.   The skin cleansing agent according to claim 1 or 2, wherein the mass ratio of the components (A), (B) and (C) is (C) / ((A) + (B)) = 0.025 to 0.08. Composition.   The mass ratio of the components (A), (B), (C) and (D) is (D) / ((A) + (B) + (C)) = 0.19 to 0.34. The skin cleanser composition of any one of 1-3.   The skin cleansing composition according to any one of claims 1 to 4, wherein a mass ratio of the components (A) and (B) is (A) :( B) = 85: 15 to 25:75.   The skin cleansing composition according to any one of claims 1 to 5, which has a pH of 4.5 to 7 when diluted 20 times by mass with ion-exchanged water.