JP2011225466A - Skin detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin detergent composition which does not feel slimy in rinsing, feels fresh, quickly provides stop feeling, and also imparts good feel after drying.SOLUTION: The skin detergent composition contains following components (A)-(F): an anionic surfactant (A), a cationic polymer (B), one or more kinds of surfactants selected from an amphoteric surfactant and a nonionic surfactant (C), an inorganic salt (D), an organic acid salt (E), and water (F), wherein a mass ratio between the component (D) and the component (E) is (D)/(E)=(10/1)-(1.2/1).

Description

  The present invention relates to a skin cleansing composition.

  2. Description of the Related Art In recent years, emphasis has been placed on skin cleansing agents in addition to detergency, foaming, rinsing properties, feeling during use, etc. due to diversification of user preferences. On the other hand, along with an increase in users who suffer from rough skin, there is also a demand for gentleness to the skin, and a variety of surfactants are used, such as blending surfactants that are gentle to the skin.

For example, polyoxyethylene alkyl ether sulfate, a general-purpose surfactant, is a surfactant that is gentler to the skin than fatty acid salts (soaps). I can not get the feeling.
Even when such a surfactant is used, there is a demand for a skin cleanser that feels refreshing and has a feeling of frictional resistance (stop feeling) during rinsing and that provides a good feel even after drying.

Patent Document 1 includes a composition mainly composed of polyoxyethylene alkyl ether sulfate and polyoxyethylene alkyl ether carboxylate, a specific cationic polymer, inorganic salt or organic acid salt, polyoxyethylene alkyl ether type A skin cleanser composition containing a nonionic surfactant and a higher alcohol is described.
However, such a detergent composition has not been sufficiently satisfactory in terms of the non-stickiness at the time of rinsing, a refreshing feeling, a feeling after drying, and the like.

In addition, in Patent Document 2 and Patent Document 3, in a personal cleansing composition based on a water-soluble surfactant such as polyoxyethylene alkyl ether sulfate, by adding a water-insoluble oil such as polyisobutene or silicone, It is described to provide an improved rinse feel upon rinsing.
However, when an oil component is added to the skin cleansing composition, particularly when used for whole body washing, there are problems such as insufficient stop feeling during rinsing, stickiness remaining during drying, and loss of foaming properties. was there.

JP 2009-263289 A Special table 2001-513539 gazette Special table 2001-513538 gazette

  It is an object of the present invention to provide a skin cleanser composition that does not become greasy during rinsing, can provide a quick stop feeling with a refreshing feel, and has a good feeling after drying.

  The present inventors solved the above-mentioned problems by using an inorganic salt and an organic acid salt in a specific ratio together with an anionic surfactant, a cationic polymer, an amphoteric surfactant and / or a nonionic surfactant. It has been found that a skin cleanser composition can be obtained.

The present invention includes the following components (A) to (F):
(A) an anionic surfactant,
(B) a cationic polymer,
(C) one or more surfactants selected from amphoteric surfactants and nonionic surfactants,
(D) inorganic salt,
(E) organic acid salt,
(F) A skin cleanser composition containing water and having a mass ratio of components (D) and (E) of (D) / (E) = 20/1 to 1.2 / 1. is there.

  The skin cleanser composition of the present invention does not become slippery during rinsing, can provide a quick stop feeling with a refreshing feel, refreshes the skin even after drying, and provides an excellent feel that is smooth. . In addition, the foam quality is fine and the rinsing properties are good.

  The anionic surfactant of the component (A) used in the present invention is not particularly limited as long as it is used in a normal detergent composition, and preferably has an alkyl chain having 8 to 22 carbon atoms. For example, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether carboxylate, higher fatty acid salt, acylated amino acid salt and the like can be mentioned.

As the component (A), it is preferable to use a combination of an anionic surfactant having a sulfate group and an anionic surfactant having a carboxyl group in terms of good foamability and mildness to the skin.
As an anionic surfactant having a sulfate group, a polyoxyethylene alkyl ether sulfate represented by the following formula is preferred.

(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. The average number of moles m added of ethylene oxide is preferably 0.5 to 10, particularly 0.5 to 4.
Examples of X include 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. Ammonium is preferred.

  In addition, examples of the anionic surfactant having a carboxyl group include polyoxyethylene alkyl ether carboxylic acids represented by the following formulas or salts thereof, N-acyl amino acid salts such as N-acylglycine, and those having 10 to 18 carbon atoms. Higher fatty acid salts are preferred.

(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, Y represents a hydrogen atom, an alkali metal, an alkaline earth metal, or ammonium. , Organic ammonium, or basic amino acid)

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 preferably 0.5 to 10, particularly 1 to 6.
Examples of the alkali metal represented by Y include sodium and potassium, and an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide can be used for blending. Examples of the alkaline earth metal and organic ammonium are the same as described above. Examples of basic amino acids include lysine, histidine, arginine and the like. Y is preferably an alkali metal or a basic amino acid, more preferably sodium, potassium or arginine.

  Component (A) can be used singly or in combination of two or more, and it is preferable to contain 0.5 to 20% by weight, particularly 3 to 15% by weight, as the acid in the total composition because foaming is good.

The cationic polymer of component (B) used in the present invention is a polymer containing an amino group, an imidazolyl group, a pyridyl group, a salt thereof or a quaternized salt, and the cationic charge density is 2 meq / g or more. In particular, those having 3 to 7 meq / g are preferable because the dry feeling of the skin after drying is good.
Here, the cation charge density refers to the equivalent number (meq / g) of cation charge in the monomer unit constituting the polymer.

  Examples of such a cationic polymer include a homopolymer of dimethyl diallylammonium chloride; a copolymer of dimethyl diallylammonium chloride and other monomers such as (meth) acrylic acid, (meth) acrylic ester, (meth) acrylamide; Examples thereof include polychlorinated methacryloyloxyethyl trimethyl ammonium chloride.

  More specifically, a homopolymer of dimethyldiallylammonium chloride (Mercoat 100; manufactured by NALCO: charge density 6.2 meq / g), a copolymer of dimethyldiallylammonium chloride and acrylic acid (Mercoat 295; manufactured by NALCO: charge) Density 5.9 meq / g), copolymer of dimethyldiallylammonium chloride and acrylic acid (Mercoat 280; manufactured by NALCO: charge density 5.0 meq / g), copolymer of dimethyldiallylammonium chloride and acrylamide (Mercoat 550; NALCO: charge density 3.2 meq / g), polychlorinated methacryloyloxyethyltrimethylammonium chloride (Kao Corporation: charge density 4.8 meq / g), copolymer of methylvinylimidazolium chloride and vinylpyrrolidone (rubicut excelence) ; BA SF, Inc .: charge density 6.1 meq / g, Rubycut FC550; BASF, charge density 4.4 meq / g).

  As the polymer of component (B), in particular, a homopolymer of dimethyldiallylammonium chloride, a copolymer of dimethyldiallylammonium chloride and acrylic acid, a copolymer of dimethyldiallylammonium chloride and acrylamide, It is also preferable from the viewpoint of corrosion resistance of the production equipment.

  One or more types of component (B) can be used, and 0.01 to 2% by mass, particularly 0.05 to 1% by mass, is contained in the total composition, so that the skin feels dry after drying. It is preferable because it is good.

Component (C) used in the present invention is one or more surfactants selected from amphoteric surfactants and nonionic surfactants.
Examples of amphoteric surfactants include carbobetaine, sulfobetaine, imidazolinium betaine, amide betaine, and the like. Nonionic surfactants include alkyl glucoside, alkyl glyceryl ether, and the like.

  As the component (C), fatty acid amidopropyl betaine, hydroxypropylsulfobetaine, and alkyl glucoside are preferable from the viewpoint of improving foamability.

  One or more types of component (C) can be used, and 0.5 to 15% by mass, particularly 2 to 10% by mass, in the total composition is preferable in terms of improving foamability.

  Examples of the component (D) inorganic salt used in the present invention include salts of alkali metal, alkaline earth metal, halogen, sulfuric acid, sulfurous acid, phosphoric acid and the like, and specifically, sodium chloride, potassium chloride, sodium sulfate. Potassium sulfate, magnesium chloride, magnesium sulfate, potassium aluminum sulfate (alum), ammonium ammonium sulfate (alum), aluminum chloride, aluminum sulfate, aluminum lactate and the like.

  Among these, it is preferable to use a combination of a monovalent metal salt and a polyvalent metal salt, and it is more preferable to use a combination of a sodium salt and an aluminum salt in terms of improving rinsing properties and smoothing the skin after drying. Specifically, sodium chloride, sodium sulfate, potassium aluminum sulfate (alum), and aluminum ammonium sulfate are preferable.

  One or more types of component (D) can be used, and it is preferably 0.1 to 4% by mass, particularly 0.5 to 3% by mass in the total composition from the viewpoint of improving rinsing.

  As the organic acid salt of the component (E) used in the present invention, those having 6 or less carbon atoms are preferable. For example, in addition to acetic acid, hydroxy acids such as lactic acid, malic acid, citric acid, and succinic acid, polyvalent acids, Examples include salts with alkali metals. Of these, hydroxy acid salts are preferred from the viewpoints of the solubility of the complex formed from the components (A) and (B) and the foaming properties during washing.

  One or more types of component (E) can be used, and 0.1 to 3% by mass, particularly 0.5 to 2% by mass in the total composition is preferable in terms of fine foam quality.

In the present invention, the mass ratio of the components (D) and (E) is (D) / (E) = 10/1 to 1.2 / 1, preferably 5/1 to 1.2 / 1, more preferably. Is 2.5 / 1 to 1.2 / 1. Within this range, the foam quality when foamed becomes fine.
Further, the mass ratio of the components (B), (D) and (E) is ((D) + (E)) / (B) = 50/1 to 1/1, particularly 25/1 to 2/1. It is preferable from the viewpoint of rinsing properties.

  In the present invention, the complex formed by the components (A) and (B) or other components is precipitated at the time of rinsing and adsorbed on the skin surface to improve the feeling at the time of rinsing and the skin feeling at the time of drying. Can do. When the components (A) and (B) are mixed in the skin cleansing composition, a part thereof forms a complex and becomes water-insoluble. By combining the component (C) with the cleaning composition, the complex can be dissolved in the cleaning agent while improving the foam performance during cleaning. However, the complex cannot be sufficiently dissolved in the cleaning agent only by the component (C). As a result, the amount of the complex deposited during rinsing is reduced, so that it is not possible to sufficiently suppress the luster or the like during rinsing. Therefore, by combining components (D) and (E) at a specific ratio, more complex can be dissolved in the cleaning agent. The detergent composition thus obtained can increase the amount of the complex deposited during rinsing, increase the amount adsorbed on the skin, and increase the rinsing effect for suppressing luster and the like. Furthermore, the feel of the skin after drying can be further increased. Moreover, the foam quality can be made fine by adding components (D) and (E).

  The component (F) water occupies the remainder of the component and is preferably contained in the total composition in an amount of 1 to 98% by mass, particularly 20 to 90% by mass.

  The skin cleansing composition of the present invention further comprises components used in ordinary skin cleansing agents, such as moisturizers, oily components, bactericides, anti-inflammatory agents, preservatives, chelating agents, thickeners, salts, pearls. An agent, a scrub agent, a fragrance, a cooling agent, a pigment, an ultraviolet absorber, an antioxidant, a plant extract and the like can be contained.

  The skin cleansing composition of the present invention dissolves by mixing water and a surfactant corresponding to components (A) and (C). Further, various salts corresponding to the components (D) and (E) are mixed and made uniform. The mixed solution is desirably heated in order to improve the solubility or dispersibility. Thereafter, the cationic polymer of the component (B) is mixed to be uniform, and then other optional components are added to be uniform, and the mixture is brought to room temperature. The skin cleanser composition can be obtained as a liquid or paste. In particular, a liquid skin cleanser composition is suitable.

  The skin cleansing composition of the present invention is suitable as a facial cleanser, body soap, hand soap, and the like.

Examples 1-5, Comparative Examples 1-4
Skin cleansing compositions having the compositions shown in Table 1 were produced and evaluated for foaming, foam quality, loss of luster when rinsing, feel at the end of rinsing and dry feeling of the skin after drying. The results are also shown in Table 1.

(Production method)
Ingredients (A), (C) and (F) are mixed and dissolved by heating to 60-70 ° C. If unneutralized component (A) is present, add 48% NaOH to neutralize. Thereafter, components (E) and (D) are added and stirred until uniform. Furthermore, a component (B) is added and it stirs until it becomes uniform. Then, it cooled to room temperature, stirring, and obtained the skin cleansing composition.

(Evaluation methods)
(1) Foaming:
10 g of each expert's cleaning composition was picked up by one hand, diluted about 2 to 5 times with tap water and foamed, and the ease of foaming at the initial stage of foaming was sensory evaluated. The results are shown in terms of the number of panelists evaluated as easily foaming.

(2) Foam quality:
Ten professional panelists took 1 g of each cleaning composition in one hand, diluted with tap water, and sensory evaluated the fineness of the foam when foamed for about 30 seconds. The results are shown in terms of the number of panelists who evaluated that the foam was fine.

(3) Loss of luster when rinsing:
Take 1g of each detergent composition in one hand by one expert panel, dilute with tap water and foam, wash one arm (from the elbow), and tap with the other hand The number of times the water was applied to the forearm was measured before the sag was lost and the feeling of stop was felt. The results were shown according to the following criteria according to the number of water applied.
A: The number of splashed water was 7 times or less.
B: The number of times of water applied is 8 to 14 times.
C: The number of times of water applied is 15 to 21 times.
D: The number of applied water was 22 to 28 times.
E: The number of splashed water was 29 times or more.

(4) Feel at the end of rinsing:
The whole body was washed by 10 professional panelists using each of the detergent compositions, and sensory evaluation was made on the feel at the end of rinsing (stop feeling and refreshing feeling). Specifically, each specialized panelist first cleans the whole body in Comparative Example 1, grasps the feel at the end of rinsing, and uses this as a reference (rinse with about 40 ° C. water and still get wet) State). Thereafter, each cleaning composition is used and evaluated in the same manner. At this time, it was shown by the number of panelists evaluated that the stop feeling and the refreshing feeling were stronger than those of Comparative Example 1.

(5) Skin dryness after drying:
The whole body was cleaned by 10 professional panelists using each of the cleaning compositions, and sensory evaluation was performed on the feeling after touch (smooth feeling). Specifically, each specialized panelist first cleans the whole body in Comparative Example 1, grasps the feeling at the end of rinsing, and uses this as a reference (a wet body is dried with a towel). Thereafter, each cleaning composition is used and evaluated in the same manner. At this time, it was shown by the number of panelists evaluated as having a more smooth feeling than Comparative Example 1.

Examples 6 and 7
Skin cleansing compositions having the compositions shown in Table 2 were produced in the same manner as in Examples 1-5.
After the viscosity of the obtained skin cleansing composition was sufficiently acclimatized by placing it in a thermostatic bath at 30 ° C., a B-type viscometer (manufactured by Toki Sangyo Co., Ltd., rotor: No. 3, rotation speed: 30 rpm) was used. Measured for 1 minute.

  Any of the obtained skin cleanser compositions did not become slippery at the time of rinsing, and it was possible to quickly obtain a stop feeling with a refreshing feel, and the feeling after drying was also good.

Claims (3)

The following components (A) to (F):
(A) an anionic surfactant,
(B) a cationic polymer,
(C) one or more surfactants selected from amphoteric surfactants and nonionic surfactants,
(D) inorganic salt,
(E) organic acid salt,
(F) A skin cleanser composition containing water and having a mass ratio of components (D) and (E) of (D) / (E) = 10/1 to 1.2 / 1.   The skin cleansing composition according to claim 1, wherein component (D) is a combination of a monovalent metal salt and a polyvalent metal salt.   The skin cleanser according to claim 1 or 2, wherein the mass ratio of the components (B), (D) and (E) is ((D) + (E)) / (B) = 50/1 to 1/1. Composition.