JP2008285479A - Skin cleansing composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin cleansing composition excellent in foamability and foam quality, especially providing a good stop feeling during rinsing and a refreshed touch feeling after towel blotting. <P>SOLUTION: The skin cleansing composition comprises the following ingredients (A), (B) and (C): (A) a polyoxyethylene alkyl ether sulfate, (B) a polyoxyethylene alkyl ether carboxylate, and (C) (C1) a cationic group-containing polymer having ≥4.5 meq/g cationic charge density or (C2) a cationic group-containing pyrrolidone copolymer. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a skin cleansing composition.

  Among various performances required for a skin cleanser for cleansing the face and the whole body, it is important that there is a feeling of friction resistance (stop feeling) as a feeling of rinsing during use. It is preferable that the time until the stop feeling is felt at the time of rinsing and that the strength is strong give a refreshing feeling of washing.

  Conventionally, a skin cleanser composition mainly composed of polyoxyethylene alkyl ether sulfate, which is a general-purpose surfactant in this field, has a problem that although it has good foaming, it feels slimy for a long time during rinsing. . In Patent Documents 1 and 2, in a personal cleansing composition mainly composed of a water-soluble surfactant such as polyoxyethylene alkyl ether sulfate, it is improved at the time of rinsing by adding a water-insoluble oil such as polyisobutene and silicone oil. Giving a good rinsfeel is described. 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 the strong nature, there were problems such as stickiness and lack of a refreshing feel.

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, these detergent compositions are not fully satisfactory from the viewpoint of stop feeling at the time of rinsing in skin cleaning applications.
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, in particular, has a good stop feeling at the time of rinsing, and provides a refreshing feel after towel drying.

  When the present inventors use polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether carboxylate, and a specific cationic group-containing polymer in combination, a skin cleansing composition that solves the above problems can be obtained. I found.

The present invention includes the following components (A), (B) and (C):
(A) polyoxyethylene alkyl ether sulfate,
(B) polyoxyethylene alkyl ether carboxylate,
A skin cleansing composition containing (C) (C1) a cationic group-containing polymer having a cationic charge density of 4.5 meq / g or more, or (C2) a cationic group-containing vinylpyrrolidone copolymer.

  The skin cleansing composition of the present invention has quick foaming, excellent foam amount and foam quality, good stop feeling at the time of rinsing, and a refreshing feel after towel drying. Moreover, a pearl appearance improves more by containing polyvinylpyrrolidone. Further, by containing a higher fatty acid or higher alcohol, the foam disappearance in the drainage groove when the used body towel is rinsed or washed off becomes good.

  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 represents an alkyl group or alkenyl group having 10 to 18 carbon atoms, n represents an average number of 0.5 to 5, and X represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or Indicates organic ammonium)

In the formula, R is particularly preferably an alkyl group having 12 to 14 carbon atoms. Moreover, although the average added mole number of ethylene oxide is 0.5-5, it is especially preferable that it is 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. It is preferable because of its excellent properties.

  As a polyoxyethylene alkyl ether carboxylate of a component (B), what is represented by a following formula is preferable.

(In the formula, R represents an alkyl group or alkenyl group having 10 to 18 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, ammonium, or Indicates organic ammonium)

In the formula, R is particularly preferably an alkyl group having 12 to 16 carbon atoms. Moreover, although the average added mole number of ethylene oxide is 0.5-10, it is especially preferable that it is 1-6.
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. It is preferable because it is excellent in quantity, foam quality and stop feeling at the time of rinsing.
Further, the total content of 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. .

In the present invention, together with the components (A) and (B), as the component (C), (C1) a cationic group-containing polymer having a cationic charge density of 4.5 meq / g or more, or (C2) a cationic group-containing vinylpyrrolidone Copolymers are used in combination.
Here, the cation charge density refers to the equivalent number (meq / g) of cation charge in the monomer unit constituting the polymer.

  Among these, (C1) the cationic group-containing polymer having a cationic charge density of 4.5 meq / g or more includes, for example, dimethyldiallylammonium chloride homopolymer; dimethyldiallylammonium chloride and (meth) acrylic acid, (meth) acrylic Examples thereof include copolymers with other monomers such as acid esters and (meth) acrylamide; polychlorinated methacryloyloxyethyltrimethylammonium 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, particularly 4.5 to 7, preferably 5 to 7, 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. .

  On the other hand, among the components (C), (C2) cationic group-containing vinylpyrrolidone copolymer includes vinylpyrrolidone and cation groups such as dimethylaminoethyl (meth) acrylic acid (quaternized product), methylvinylimidazolium, etc. Examples thereof include a copolymer with a monomer.

More specifically, a copolymer of vinyl pyrrolidone and N, N-dimethylaminoethyl methacrylic acid (Guffcut 755N; manufactured by BASF: charge density 0.3 to 0.4 meq / g), vinyl pyrrolidone and methyl vinyl chloride Copolymers of imidazolium (rubicut excellence: copolymerization ratio 5:95, charge density 6.1 meq / g, rubicut FC370: copolymerization ratio 30:70, charge density 2.0 meq / g; manufactured by BASF) It is done.
The cationic charge density of the cation group-containing vinylpyrrolidone copolymer is preferably 2.5 to 7 meq / g in terms of stop feeling during 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.

  One or more types of component (C) can be used, and 0.05 to 1% by mass, particularly 0.075 to 1% by mass in the total composition is excellent in stop feeling at the time of rinsing. preferable.

  The skin cleansing composition of the present invention can further contain (D) polyvinylpyrrolidone. Thereby, the stop feeling at the time of rinsing can be further enhanced, and when a pearly luster imparting agent is added, a beautiful pearl appearance excellent in liquid appearance is provided, which is preferable.

  As the polyvinyl pyrrolidone, those having a K value of 10 to 100, particularly 15 to 90 are preferable because they are excellent in stop feeling at the time of rinsing. Here, the K value is a value called an intrinsic viscosity derived from a Fikentscher's formula expressing the viscosity of the polyvinylpyrrolidone solution as a function of concentration. Polyvinyl pyrrolidone varieties are indicated by this K value, which is a measure of molecular weight.

  One or more kinds of component (D) can be used, and 0.01 to 1% by mass, particularly 0.1 to 0.8% by mass in the total composition contains stop feeling during rinsing and It is preferable in terms of the good liquid appearance.

When the components (C) and (D) are used in combination, their mass ratio is (C) :( D) = 90: 10-20: 80, particularly 80: 20-25: 75. The stop feeling and the liquid appearance are favorable.
Further, the total content of components (C) and (D) in the total composition is 0.06 to 3% by mass, particularly 0.1 to 1% by mass, and the stop feeling during rinsing and Since the liquid appearance is good, it is preferable.

  The skin cleansing composition of the present invention can further contain (E) 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. Examples of organic acid salts include acetic acid, hydroxy acids such as lactic acid, malic acid, citric acid, and succinic acid, and salts of 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 of a complex formed by three components of components (A), (B) and (C) ((C) represents a cationic polymer of (C1) or (C2)) Is preferable because it is easily dissolved, the stop feeling is improved, and the liquid appearance (transparency) is also improved.

  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 components (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 is It becomes easier to dissolve.

  Furthermore, the complex formed by the three components (A), (B), and (C) is more easily dissolved by including (D) an inorganic salt or an organic acid salt having 6 or less carbon atoms. The value of (D) / ((A) + (B) + (C)) is 0.19 to 0.34, so that the solubility is increased, and the stability and gloss of pearl are easily developed. So it is more preferable. Since the complex is deposited in the dilution process and adsorbs to the skin, the slime disappears quickly and the stop feeling is further improved, which is preferable.

The skin cleansing composition of the present invention may further contain (F) a higher fatty acid and / or a higher alcohol. Here, the higher fatty acid and the higher alcohol are preferably linear or branched ones having 10 to 18 carbon atoms, particularly those having 12 to 15 carbon atoms.
By containing these components, the amount of foam can be controlled in a higher dilution ratio area than the normal dilution ratio area where body washing is performed. In addition, the ease of disappearance of bubbles remaining in the drain outlet after washing off from the body (foam breakage) becomes good.

  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, and it is considered that it contributes to improvement of foam performance in a dilution ratio region where body washing is usually performed. It is done.

As the component (F), one or more kinds can be used, and a higher fatty acid and a higher alcohol can be used in combination. In particular, it is preferable to use a combination of lauric acid and myristyl alcohol in that the foam performance is improved and the effect of eliminating the foam is good.
The component (F) is preferably contained in the total composition in an amount of 0.3 to 3% by mass, particularly 0.5 to 2% by mass.

The skin cleansing composition of the present invention may further contain (G) a pearly luster imparting agent.
Pearl gloss imparting agents include (mono, di) esters of fatty acids having 16 to 22 carbon atoms and ethylene glycol, esters of fatty acids having 16 to 22 carbon atoms and polyethylene glycol having polyoxyethylene (1-7) units. Etc. In particular, (mono, di) ethylene glycol esters of fatty acids having 16 to 18 carbon atoms are preferred.

  More specifically, for example, ethylene glycol monofatty acid esters such as ethylene glycol monostearic acid ester and ethylene glycol monobehenic acid ester; ethylene glycol difatty acid esters such as ethylene glycol distearic acid ester and ethylene glycol dibehenic acid ester Etc.

  One or more kinds of the pearly luster imparting agent can be used, and it is preferably contained in the total composition in an amount of 1 to 3% by mass, particularly 1.5 to 2.5% by mass because the glossiness of the pearl is good. .

  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, humectants such as propylene glycol, dipropylene glycol, glycerin and sorbitol; solvents such as water and ethanol; viscosity modifiers such as methylcellulose; bactericides such as triclosan and trichlorocarban; potassium glycyrrhizinate and acetic acid Anti-inflammatory agents such as tocopherol; antiseptics such as methylparaben, butylparaben, phenoxyethanol, benzoate; other pigments, fragrances, ultraviolet absorbers, antioxidants, and the like can be appropriately contained.

  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 1-17, Comparative Examples 1-13
The skin cleansing compositions having the compositions shown in Tables 1 to 6 were manufactured, the speed until the stop feeling was felt at the time of rinsing, the strength of the stop feeling at the end of rinsing, the refreshing feeling after towel drying and the foam The volume of was evaluated. In some experimental examples, pearl appearance, bubble breakage, and liquid appearance were also evaluated. The results are also shown in Tables 1 to 6, respectively.
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 or malic acid 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 less than 3 times.
4: The number of rubbing is 3 or more and less than 6 times.
3: The number of rubbing is 6 times or more and less than 9 times.
2: The number of rubbing is 9 times or more and less than 12 times.
1: The number of rubbing is 12 times or more.

(2) Strength of stop feeling at the end of rinsing (whole body washing evaluation):
In the evaluation test of the above (1), 10 professional evaluators cleaned the whole body once a day using each cleaning composition. This was performed for 3 consecutive days, and the results of evaluating the strength of the stop feeling at the end of rinsing were shown by the following criteria.
◎; 8 or more people answered that the stop feeling at the end of rinsing was strong.
○: 5 to 7 people answered that the stop feeling at the end of rinsing was strong.
Δ: 2 to 4 people answered that the stop feeling at the end of rinsing was strong.
X: 0 or 1 responded that the stop feeling at the end of rinsing was strong.

(3) Refreshing feeling after towel drying (whole body washing evaluation):
In the evaluation test of the above (1), 10 professional evaluators cleaned the whole body once a day using each cleaning composition. This was performed continuously for 3 days, and the results of evaluating the refreshing feeling after towel drying were shown by the following criteria.
◎; 8 or more people answered that they would refresh after towel drying.
○: 5 to 7 people answered that they would refresh after towel drying.
Δ: 2 to 4 people answered that they would refresh after towel drying.
X: 0 or 1 responded that they would refresh after towel drying.

(4) Bubble volume:
The cleaning composition prepared in each Example and Comparative Example was diluted 150 times with 4 degree hard water (corresponding to conditions for body washing) to obtain a sample aqueous solution. Add 50 mL of sample aqueous solution to a 50 mL glass cylinder with a stopcock (35 mm x 78 mm), plug it, and use a shaker (manufactured by Iwaki Sangyo Co., Ltd., model number universal shaker V-SX) for 300 stroke / The mixture was shaken for 30 seconds at a speed of minutes, and the amount of foam immediately after the end of the shaking was read.

(5) Pearl appearance:
The appearance when the cleaning composition was placed in a glass bottle, particularly the glossiness of pearl, was evaluated visually. The evaluation results were ranked according to the following criteria.
A: There is pearl luster.
B: The pearl luster is slightly weak.
C: There is no pearl luster.

(6) Out of foam:
The detergent composition prepared in each Example and Comparative Example was diluted with 4 degree hard water to a high magnification (400 times) assuming foaming after rinsing to obtain a sample aqueous solution. Add 50 mL of sample aqueous solution to a 50 mL graduated glass cylindrical tube with a stopcock, plug it, and use a shaker (model number: universal shaker V-SX, manufactured by Iwaki Sangyo Co., Ltd.) at a speed of 300 (stroke / min) Shake for 30 seconds and read the amount of foam (cm) immediately after shaking.

(7) Liquid appearance:
The appearance (transparency) when the 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.

Example 18
Body shampoos having the compositions shown below were produced in the same manner as in Examples 1-17.

Example 19
Body shampoos having the compositions shown below were produced in the same manner as in Examples 1-17.

Example 20
Body shampoos having the compositions shown below were produced in the same manner as in Examples 1-17.

Example 21
Body shampoos having the compositions shown below were produced in the same manner as in Examples 1-17.

  The body shampoos obtained in Examples 18 to 21 are all excellent in foaming properties and foam quality, and have a good stop feeling when rinsing and a refreshing feel after towel drying. The pearl appearance is also good.

Claims (8)

The following components (A), (B) and (C):
(A) polyoxyethylene alkyl ether sulfate,
(B) polyoxyethylene alkyl ether carboxylate,
(C) (C1) A skin cleansing composition containing a cationic group-containing polymer having a cationic charge density of 4.5 meq / g or more, or (C2) a cationic group-containing vinylpyrrolidone copolymer.   The mass ratio of components (A) and (B) is (A) :( B) = 85: 15-25: 75, and the total content of components (A) and (B) in the total composition is 5 The skin cleansing composition according to claim 1, wherein the content of the component (C1) or (C2) is 0.05 to 1% by mass.   The skin cleanser composition according to claim 1 or 2, wherein the cationic group-containing polymer of component (C1) is a homopolymer of dimethyldiallylammonium chloride or a copolymer of dimethyldiallylammonium chloride and acrylic acid.   Furthermore, the skin cleansing composition of any one of Claims 1-3 containing (D) polyvinylpyrrolidone.   The skin cleanser composition according to any one of claims 1 to 4, further comprising (E) an inorganic salt or an organic acid salt having 6 or less carbon atoms.   The skin cleanser composition according to any one of claims 1 to 5, further comprising (F) a higher fatty acid or a higher alcohol.   Furthermore, the skin cleansing composition of any one of Claims 1-6 containing (G) pearl luster imparting agent.   The skin cleansing composition according to any one of claims 1 to 7, which has a pH of 4.5 to 7 when diluted 20 times by mass with ion exchange water.