JPS624216A - Pack cosmetic - Google Patents

Abstract

PURPOSE:A pack cosmetic preventing aggregation and settling of powder and gelatinization of system, having improved stability, obtained by bleding a pack cosmetic of polyvinyl alcohol system containing powder with a water-soluble high polymer compound and a dispersant. CONSTITUTION:A pack cosmetic comprising (A) 3-30wt%, especially 5-20wt% based on total amount of pack cosmetic of powder of silicic anhydride, etc., for the purpose of improvement in drying properties, promotion of tension, etc., (B) condensed phosphoric acid, especially sodium hexametaphosphate or sodium pyrophosphate as a dispersant 0.005-0.2wt% based on the total amount of the cosmetic of and (C) 0.05-5wt%, especially 0.1-3wt% based on the total amount of the cosmetic of water-soluble high polymer compound having thixotropic properties, especially xanthan gum, karaya gum, etc., having rapid drying time in application to the skin and improved utility free from stability problems of settling, aggregation, gelatinization of system.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides polyvinyl alcohol (hereinafter referred to as P) containing powder.
The present invention relates to a highly stable pack cosmetic that prevents powder agglomeration, sedimentation, gelation, etc. in a VA) type pack cosmetic.

[Conventional technology]

Conventionally, powders have been added to PVA-based pack cosmetics for the purpose of improving drying properties, promoting a sense of tension, and the like.

However, when powder is added to PVA-based pack cosmetics, it is difficult to maintain the powder uniformly and stably in the system.
Aggregation, sedimentation, and gelation of the system were frequently observed, which was unfavorable in terms of stability.

Generally, attempts have been made to solve these problems by adding a water-soluble polymer compound such as carboxyvinyl polymer having thixotropic properties or xanthine gum, which is a polysaccharide-based polymer, to stabilize the problem. If a large amount of powder is blended, the effect cannot be expected to be very high, and if a large amount of these water-soluble polymer compounds is blended, it will adversely affect the gelation of the system. .

[Problem that the invention seeks to solve]

The present inventors have found that it is possible to solve the disadvantages of PVA-based packs containing the above-mentioned powders, such as powder agglomeration, sedimentation, and system gelation (as a result of intensive research, it has been found that By adding a dispersant, powder agglomeration,
The present invention was completed based on the discovery that a powder-containing PVA backing cosmetic can be obtained which prevents sedimentation and has extremely good stability without causing gelation of the system.

[Means to solve the problem]

That is, the present invention is a pack cosmetic whose main coating agent is PVA containing powder, which is characterized in that it contains a dispersant and a water-soluble polymer compound.

The present invention will be explained in detail below.

The powders used in the present invention are anhydrous silicic acid, magnesium silicate, talc, kaolin, mica, titanium mica, bismuth oxychloride, zirconium oxide, magnesium oxide, zinc oxide, titanium oxide, calcium carbonate, magnesium carbonate, yellow iron oxide, gunjo , carbon black, calamine, etc., and one or more types are selected from these and used. The stability of the system is particularly good when 20% or more of kaolin is used in the total amount of powder.

The blending amount is 3 to 30% by weight, preferably 5 to 20% by weight based on the total amount of the pack cosmetic. If it is less than 3% by weight, it is difficult to obtain the effect of powder formulation such as shortening the drying time, and if it exceeds 30% by weight, it is difficult to obtain a pack cosmetic with good usability considering the amount of PVA and water required for film formation. difficult.

The water-soluble polymer compound used in the present invention may be any water-soluble polymer compound having thixotropic properties,
Examples include synthetic cellulose-based polymer compounds represented by methylcellulose, sodium carboxymethylcellulose, etc., carboxyvinyl polymers, and natural polysaccharide-based compounds represented by xanthine gum, carrageenan, karaya gum, etc., and one or more types from these. is selected and used. Among these compounds, xanthine gum and karaya gum are particularly effective.

The blending amount is 0.05 to 5% by weight, preferably 0.1 to 3% by weight based on the total amount of the pack cosmetic. If it is less than 0.05% by weight, no effect can be expected, and if it is more than 5% by weight, it is not preferable because of problems such as gelation of the system.

The dispersant used in the present invention is a condensed phosphoric acid, and examples thereof include orthophosphates, polyphosphates, metaphosphates, ultraphosphates, and the like.

Among these, sodium hexametaphosphate and sodium pyrophosphate are preferred.

The blending amount is 0.005 to 0.2% by weight, and 0.005% by weight.
If the amount is less than i%, no effect can be expected. Also 0.2% by weight
Even if the amount exceeds 100%, no further improvement in effectiveness is observed.

The polyvinyl alcohol used in the present invention has a degree of polymerization of 3.
00 to 15,000 and preferably has a saponification degree of 60 to 100.

The blending amount is 5 to 30% by weight, preferably 5 to 20% by weight, and if it is less than 5% by weight, there is a problem in film formation, and 30% by weight or less.
If it exceeds this percentage by weight, the amount of water to be blended will be small, resulting in high viscosity, resulting in disadvantages such as difficulty in usability, and it will also be difficult to adjust the formulation.

In addition to the above-mentioned essential ingredients, the pack cosmetic of the present invention contains other ingredients commonly used in cosmetics such as polyhydric alcohols, oils, lower alcohols, preservatives and disinfectants, coloring agents, fragrances, drugs, and other polymers. can be appropriately blended within a range that does not impair the effects of the present invention.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples. The present invention is not limited to this in any way. % in Examples and Comparative Examples indicates weight %.

Example 1.2 and Comparative Examples 1 and 2 (Table 1) Ethyl alcohol 10 10 10 10 Xanthine gum
0.3 0.3 - 0.3 Titanium
3 3 3 3 Talc 5
5 5 Yellow iron oxide 1 1 1 1 Red iron oxide 1 1 1 1 Kaolin
-5--Na hexamethanoate O,03
0,030,03-*1 Filled in transparent tube, 50℃
The powder was allowed to stand and sedimentation of the powder was observed.

(Manufacturing method) After adding the powder and dispersant to ion-exchanged water and stirring uniformly, PVA and xanthine gum are gradually added while stirring while maintaining the temperature at about 80°C to uniformly dissolve.

After that, a solution of paraben in ethyl alcohol was added to make it homogeneous and a prototype was obtained.

(Results) As shown in Table 1, in Examples 1 and 2 in which xanthine gum and sodium hexametaphosphate were used in combination, no powder sedimentation was observed and the stability was extremely good.

On the other hand, when only sodium hexametaphosphate was used (Comparative Example 1), when only xanthine gum was used (
In Comparative Example 2), no product with good stability was obtained.

Example 3 (wt%) Ion exchange water 70.49 Ethyl alcohol 8 Glycerin
5PVA (degree of saponification 90 degree of polymerization 1800) 8 Karaya rubber
2 red iron oxide
1 talc
3 Kaolin 2 Sodium pyrophosphate 0.01 Fragrance
0.1 paraben
0.1 (Manufacturing method) After adding the powder and dispersant to ion-exchanged water and stirring uniformly, PVA and Karaya gum were gradually added without stirring while maintaining the temperature at about 80°C and dissolved uniformly. Add dissolved paraben and make uniform.

(Results) The obtained pack had a viscosity of 23,000 cps, and no powder sedimentation was observed after 3 months, indicating good stability.

Example 4 (wt%) Ion exchange water 49.1 Ethyl alcohol 9 Dipropylene glycol
2PVA (degree of saponification 88%, degree of polymerization 2400) 7 Sodium carboxymethylcellulose ・0.5 Vinyl acetate emulsion (50%) 20 Black iron oxide
2 titanium 5
Kaolin 5 Sodium hexametaphosphate 0.1 Fragrance
0.2 paraben
0.1 (Manufacturing method) According to Example 3.

(Results) The obtained bank had a viscosity of 36,000 cps, showed no sedimentation or gelation of the powder after 3 months, and had good stability and usability.

Example 5 (wt%) Ion exchange water 66.78 Ethyl alcohol 101.3 Butylene glycol 10 PVA (Saponification degree 88% Polymerization degree 2000) 8 Carrageenan
l mica titanium
1 Fish scales 3 Sodium birophosphate 0.02 Flavoring
0.1 paraben
0.1 (Manufacturing method) According to Example 3.

(Results) The obtained bag had a viscosity of 18,000 cps, and no sedimentation of the powder or gelation of the system was observed after 3 months, and the stability and usability were good.

Example 6 (wt%) Ion exchange water 54.2 Ethyl alcohol 101.3 Butylene glycol 3 Glycerin 2
Olive oil lPVA (Saponification degree 88% Polymerization degree 2400) 9 Carboxy vinyl polymer 0.2 Potassium hydroxide
0.1 titanium
20 Sodium hexametaphosphate 0.
1 Sodium pyrophosphate 0.1 Fragrance 0.2 Paraben
0.1 (Production method) After adding the powder and dispersant to ion-exchanged water and stirring uniformly, the polymer was gradually added while stirring while keeping the temperature at about 80°C, and after uniformly melting, a portion of potassium hydroxide was ionized. Add the dissolved water, the flavor and paraben dissolved in ethyl alcohol, and olive oil to make a homogeneous mixture.

(Results) The obtained bag had a viscosity of 28,000 cps, no powder sedimentation was observed after 3 months, and the stability was good.

〔Effect of the invention〕

The pack cosmetic of the present invention dries quickly after being applied to the skin, has no stability problems such as powder sedimentation, aggregation, or gelation, and is a bank cosmetic with excellent usability.

Claims (1)

[Claims] A pack cosmetic whose main film agent is polyvinyl alcohol containing powder, which is characterized in that it contains a dispersant and a water-soluble polymer compound.