JP2008208089A - Skin cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin cleaner in the form of an aqueous solution where inorganic microballoon particles used as an abrasive do not float and also does not segregate in the aqueous solution. <P>SOLUTION: The skin cleaner contains 5-20 mass% of a surfactant, 5-15 mass% of an oil remover, 0.1-0.5 mass% of an acrylic acid-methacrylic acid copolymer and 3-15 mass% of hydro-floatable inorganic microballoon particles for the purpose of stably dispersing the inorganic microballoon particles such as Shirasu balloons in the aqueous solution for a long period. In this skin cleanser, the copolymer exhibits excellent dispersion-stabilizing effect and does not hinder the spreadability of the cleaner. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a skin cleanser used for hand washing and the like.

Conventionally, as a cleaning agent used for hand washing, a composition in which water-insoluble particles are dispersed in an aqueous surfactant solution is provided.
Light-weight particles such as shirasu balloons are used as the water-insoluble particles.
In addition to the detergency of the surfactant, the water-insoluble particles have a role of removing scratches by polishing dirt that is difficult to remove.
The water-insoluble particles must be stably dispersed in the aqueous surfactant solution. For this purpose, a water-soluble polymer such as CMC is added as a dispersion stabilizer.

Japanese Patent Laid-Open No. 10-204491 Japanese Patent Laid-Open No. 62-039507 Japanese Patent Laid-Open No. 10-001424

  The water-insoluble particles are desirably light-weight particles that float on water so as not to cause clogging in the drain pipe or the like. However, conventional water-soluble polymers have insufficient dispersion stability, and there is a possibility that water-insoluble particles may float and separate. When added in a large amount to prevent the particles from floating and separating, the spreadability of the cleaning agent is inferior. There was a problem that skinning occurred.

In the present invention, as a means for solving the above-described conventional problems, water-floating inorganic hollow particles are dispersed in an aqueous solution containing a surfactant, an oil removing agent, and an acrylic acid-methacrylic acid copolymer. A skin cleanser is provided.
In the cleaning agent, the surfactant is 5 to 20% by mass, the oil removing agent is 5 to 15% by mass, the acrylic acid-methacrylic acid copolymer is 0.1 to 0.5% by mass, and the water floating is performed. It is desirable that 3 to 15% by mass of the inorganic inorganic hollow particle is contained.

[Action]
The surfactant is the main role of imparting detergency to the cleaning agent of the present invention. However, an oil remover is added to oil stains to enhance the cleaning performance against oily contaminants.
The inorganic hollow body particles impart abrasiveness to the cleaning agent of the present invention, and scrub off contaminants firmly attached to the skin. Since the inorganic hollow body particles are light and float in water, they do not clog drain pipes and the like.
The acrylic acid-methacrylic acid copolymer imparts non-Newtonian viscosity to the cleaning agent of the present invention and prevents the water-insoluble particles from floating and separating even when used in a small amount. And since the said acrylic acid-methacrylic acid copolymer gives the viscosity excellent in spreadability to a cleaning agent, the usability | use_condition of a cleaning agent becomes favorable.

〔effect〕
The present invention provides a cleaning agent that efficiently removes dirt on the skin and does not clog a drain pipe or the like.

The present invention is described in detail below [Surfactant]
Examples of the surfactant used in the present invention include nonionic surfactants, anionic surfactants, and cationic surfactants. Desirable surfactants include nonionic surfactants that are less irritating to the skin. It is.
Nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenol ether, polyoxyethylene alkyl ester, polyoxyethylene alkyl amine, polyoxyethylene alkylol amine, polyoxyethylene alkyl amide, sorbitan alkyl ester, polyoxyethylene alkyl ester, Examples thereof include oxyethylene sorbitan alkyl ester.
Examples of the anionic surfactant include higher alcohol sulfate (Na salt or amine salt), alkyl allyl sulfonate (Na salt or amine salt), alkyl naphthalene sulfonate (Na salt or amine salt), alkyl naphthalene sulfonate. Examples include condensates, alkyl phosphates, dialkylsulfosuccinates, rosin soaps, fatty acid salts (Na salts or amine salts), and the like.
Examples of the cationic surfactant include octadecylamine acetate, imidazoline derivative acetate, polyalkylene polyamine derivative or a salt thereof, octadecyltrimethylammonium chloride, trimethylaminoethylalkylamide halide, alkylpyridinium sulfate, alkyltrimethylammonium halide, and the like. It is done.

[Oil remover]
Examples of the oil removing agent used in the present invention include high-boiling organic solvents that do not irritate the skin, such as benzyl alcohol, liquid paraffin, propylene glycol, ethylene glycol, glycerin, orange oil, and limonene.

[Acrylic acid-methacrylic acid copolymer]
The acrylic acid-methacrylic acid copolymer used in the present invention usually has an acrylic acid: methacrylic acid mass ratio of 10:90 to 90:10, preferably 20:80 to 80:20, more preferably 30:70 to 70: 30 copolymers and acrylic acid ester and / or methacrylic acid ester may be copolymerized to such an extent that water solubility is not inhibited.
As said acrylic acid ester or methacrylic acid ester, carbon number such as methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, isobutyl (meth) acrylate, normal butyl (meth) acrylate, etc. Esters having 4 or fewer alkyl groups are desirable. In addition, it contains many polymerized vinyl groups such as divinylbenzene, diallyl phthalate, triallyl phosphate, tetraallyloxyethane, glucose (meth) acrylic ester, and sucrose (meth) acrylic ester in one molecule. A slightly functional vinyl compound may be added as a crosslinking agent to the extent that water solubility is not impaired.

  In the cleaning agent of the present invention, the copolymer may exist in a salt state. In order to make the copolymer into a salt, for example, inorganic alkali such as caustic soda, caustic potash, sodium carbonate, etc., organic such as diethylamine, triethylamine, diisopropylamine, triisopropylamine, diethanolamine, triethanolamine, diisopropanolamine, triisopropanolamine Alkali is used. If the copolymer is made into a salt form, water solubility is improved. The copolymer may be added to the aqueous solution after having been made into a salt form in advance, or may be added to the aqueous solution and then neutralized with the alkali.

  In the above copolymer, the acrylic acid component imparts favorable spreading properties to the cleaning agent, and the methacrylic acid component imparts non-Newtonian viscosity to the cleaning agent to effectively prevent the floating separation of the water-floating inorganic hollow particles described later. . There is almost no adverse effect on the skin.

[Water-floating inorganic hollow particles]
Examples of the water-floating inorganic hollow particles used in the present invention include silica balloons, shirasu balloons, glass balloons, barlites, etc., and the particles have an apparent specific gravity smaller than water so that they float on water. The number average particle size is preferably in the range of 40 μm to 300 μm.
In addition, natural materials such as Shirasu Balloon are less toxic and harmless than artificial materials such as polyethylene powder, and are non-toxic and harmless. Desirable as a floating inorganic hollow body particle. In addition, since the surface of the water-floating inorganic hollow body particles made of an artificial material is irregular, the surface of the water-floating inorganic hollow body particles made of a natural material has a smooth surface. From the viewpoint of environmental protection, it is difficult to get stuck on the inner surface of the sewer pipe.

[Other ingredients]
As other components, for example, a water-soluble organic solvent such as ethanol and isopropanol, a titanium oxide having a photocatalytic action, an antiseptic, an antifungal agent, a fragrance, and a pigment may be added.

[Combination]
In the cleaning agent of the present invention, the surfactant is usually 5 to 20 mass%, the oil removing agent is 5 to 15 mass%, the copolymer is 0.1 to 0.5 mass%, and the inorganic hollow is in an aqueous solution. 3-15 mass% of body particles are mix | blended.
The surfactant exhibits a sufficient detergency in this range, and the cleaning effect is saturated at an amount exceeding this range.
The oil removing agent exhibits a sufficient effect of removing oily contaminants within this range, but if the amount exceeds this range, the removal effect is saturated and the skin may be roughened.
The copolymer exhibits a sufficient dispersing effect in this range. If the amount exceeds this range, the dispersing effect is saturated, and the spreadability of the cleaning agent may be deteriorated or skinning may occur.
The inorganic hollow body particles exhibit a sufficient polishing effect in this range, but if the amount exceeds this range, the cleaning agent may be roughened.

〔Example〕
The skin cleansing agents of Formulation 1 and Formulation 2 are prepared with the blending amounts shown in Table 1.


(* 1) No. 1 Copolymer composition Acrylic acid 90 parts by weight Methyl methacrylate 10 parts by weight Acrylic acid glucose ester 0.01 parts by weight (* 2) No. 1 2 Copolymer composition Methacrylic acid 80 parts by weight Ethyl acrylate 20 parts by weight Acrylic acid sucrose ester 0.02 parts by weight

[Comparative example]
The skin cleansing agents of Comparative Formulation 1 to Comparative Formulation 3 are prepared with the blending amounts shown in Table 2.


(* 1) No. 1 Copolymer composition Acrylic acid 90 parts by weight Methyl methacrylate 10 parts by weight Acrylic acid glucose ester 0.01 parts by weight

[Dispersion stability test]
The cleaning agents according to Formulas 1 and 2 were filled in a sealed container and left at room temperature for 3 months. Furthermore, the cleaning agent which mix | blended Shirasu balloon with the comparison compounding 1 so that it might become the same compounding quantity as the compounding 1 or the compounding 2 was filled in the airtight container, and it was left to stand at room temperature for 3 months. And about these cleaning agents,
The presence or absence of floating separation of the shirasu balloon was observed. The results are shown in Table 3.

[Detergency test]
A point of 1 cm diameter was drawn on the back of the hand with an oil pen (black), the point was made dirty, a small amount of sample was hung on the dirt and rubbed with a finger, and the degree of dirt was observed. The results are shown in Table 4.

[Extensibility test]
A small amount of sample was taken on the back of the hand, spread with fingers and observed. The results are shown in Table 5.

[Rinsability test]
Following the spreadability test, the hands were washed with water and the drop of the sample was observed. The results are shown in Table 6.

The skin cleanser of the present invention has excellent cleanability and abrasiveness, can easily remove strong dirt adhering to the skin, and also has good rinsing properties, so it is easy to use and long. Since it can be stored stably for a period, it can be used industrially.

Claims (2)

  A skin cleanser characterized by dispersing water-floating inorganic hollow particles in an aqueous solution containing a surfactant, an oil removing agent, and an acrylic acid-methacrylic acid copolymer. 5 to 20% by mass of the surfactant, 5 to 15% by mass of the oil removing agent, 0.1 to 0.5% by mass of the acrylic acid-methacrylic acid copolymer, and 3 to 15 of the water-floating inorganic hollow body particles. The skin cleanser according to claim 1, containing a mass%.