WO1999002129A1

WO1999002129A1 - Skin cleaning composition

Info

Publication number: WO1999002129A1
Application number: PCT/SK1998/000010
Authority: WO
Inventors: Juraj Dimitrov; Pavel Alexy; Mária PEKAROVIC^¿OVÁ; Miroslav D^¿RAC^¿KA
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-07
Filing date: 1998-07-07
Publication date: 1999-01-21
Anticipated expiration: 2000-01-07
Also published as: SK92897A3; CZ270997A3; AU8252498A

Abstract

Skin cleaning composition consists of 1 to 60 % by weight of natural and/or synthetic polymers and of a solvent up to the total amount of 100 % by weight. As a solvent water is used, or possibly a mixture of water and a monobasic alcohol, wherein the ratio monobasic alcohol : water is from 1 : 6 to 3 : 1. The composition may further contain preserving additives, cosmetically active substances, tensides, or possibly aromatic compositions.

Description

Skin cleaning composition

Technical Field

The invention concerns a composition for cleaning skin, especially of hands, in the form of a gel or possibly of a viscous solution, suitable to be used mainly under extreme conditions of water shortage.

Background Art

At present different skin cleaning compositions are well known and used which are based mainly on low- and medium-molecular substances showing detergent efficiency. These comprise especially various soaps, shampoos, body and shower gels and the like. In addition special cleaning preparations are used which are designed especially for cleaning of extremely dirty hand skin. These are in most cases compositions based on highly efficient detergents, mechanical abrasives or possibly organic solvents.

Many of the above mentioned compositions contain in their formulas one of the natural or synthetic water-soluble polymers as one of their components.

For example, patent WO 96/29979 describes a compositions for washing and cosmetic treatment of skin, based on anionic or cationic or nonionic tensides and cosmetically active substances, wherein water-soluble polymers, like polyvinylalcohol, hydroxycelluloses and their combinations with acrylic polymers, with polyvinylpyrrolidone, modified starch or hydroxyethylcellulose are used as an auxiliary medium to improve penetration of cosmetically active substances into the skin.

Authors of the patent EP 106193 mention the use of water-soluble polymers in liquid compositions for skin washing, where the polymers function as modifiers of foaming properties of the preparations, and they also contribute to pH adjusting.

Patent EP 323798 makes use of water-soluble polymers, preferably polyacrylic acid, as thickening agents in a compositions for skin care. According to the patent US 4774016 in composition for washing skin and hairs, containing nonionogenic tensides as an active component, some water-soluble polymers, especially cellulose derivatives, acacia gum and pectins are used as thickening agents

The patent application PV CZ 904-94 describes the use of some polyacrylamides as gelatinizing polymers, where the resulting gel is used as a base for cosmetically and pharmaceutically active substances for treatment of skin, especialy of that showing tendency to acne

A further PV CZ 1660-93 describes an aqueous foaming cosmetic composition for producing shampoos, shaving foams and bath foams, where one of the water-soluble polymers, like e g polysacchaπdes, homopolymers and copolymers derived from the acrylic and metacrylic acid, cellulose derivatives and the like, are used as the conditioning component

Water-soluble polymers, especially hydroxyethylcellulose, are also used as a thickening agent in a transparent liquid composition which is used as soap according to the patent EP 132961

Acording to authors of the patent EP 537737 it is possible to utilize some of the water- soluble polymers as one of the components of a bath composition which prevents forming of precipitates and agglomerates and it decreases skin desiccation

According to the patent US 5019376 a hair conditioning composition contains a water- soluble polymer, especially hydroxyethylcellulose, as a thickening agent

Authors of the patent US 5034218 describe the use of polyacrylic acid in shampoos showing conditioning effect, where it functions as a suspending agent

According to EP 535789 a film forming polymer, usually a silicone wax or a high- molecular sihcone polymer, in a polyfunctional cleaning preparation showing cosmetic effect on the skin serves as a protecting medium for the cosmetically active substances (for skin conditioning and moisturizing)

All of the above given, so far used cleaning, washing and cosmetic preparations for skin care, even when using natural or synthetic water-soluble or alcohol-soluble polymers, serve always as auxiliary agents, most often thickening agents

The main disadvantage of the preparations used so far for cleaning of the skin, especially of hands, consists in that it is necessary to use a further auxiliary medium, usually water, both for diluting the preparation which is in most cases produced in the form of a concentrate, and for skin rinsing after application of the composition. This disadvantage becomes obvious especially under extreme conditions, where no water is available.

Disclosure of Invention

The nature of the compocition according to this invention consists in that it consists of 1 to 60 % by weight of natural and/or synthetic polymers and of a solvent up to the total amount of 100 % by weight.

The polymeric component of the composition may comprise actually any natural or synthetic polymers, preferably polyvinylalcohol, polyvinylpyrrolidone, polyacrylic and polymetacrylic acid and water-soluble derivatives and copolymers thereof, natural or modified starch, water-soluble cellulose derivatives, like e.g. hydroxyethylcellulose, methylhydroxyethylcellulose, carboxymethylhydroxyethylcellulose and the like. The content of the polymeric component in the composition may vary in the range of 1 to 60 % by weight, preferably of 10 to 30 % by weight, while some of the properties, for example the viscosity required, can be achieved by combination of two or more polymers. Water or a mixture of water and of a monobasic alcohol with the ratio monobasic alcohol : water of 1 : 3 to 6 : 1 is used as a solvent for the polymers .

By dissolving the natural and/or synthetic polymer in water or possibly in the mixture water-alcohol a solution or gel results which is, after applying to skin and moderate setting, removed by rubbing it away, while absorbing the dirt from the skin surface.

To increase the cleaning effect of the composition it is possible to add to the mixture ionogenic or nonionogenic tensides which are commonly used in cleaning compositions, like laurylethersulphate or laurylsulphate in the amount of 0.1 to 3 % by weight.

The composition according to this invention may also contain preserving agents, like sodiumbenzoate or chloroacetamide or methylparabene, butylparabene or propylparabene in the amount of 0.1 to 0.3 % by weight, or possibly aromatic compositions in the amount of 0.05 to 0.5 % by weight.

If as a solvent a mixture of water and lower alcohols, like e.g. ethanol, isopropanol and the like, is used, the composition gains increased resistance to temperatures below the zero degree. Mechanism of the action of the composition according to this invention consists in that the polymer solution in the liquid or in the gel form penetrates after the application onto the skin very well also into the skin pores, and after a short time as a consequence of evaporation of a considerable amount of the solvent system from the thin preparation layer highly adhesive mass is formed which, when rubbing the skin, treated in this way, removes dirt also from the depth of the skin pores and absorbs it, and the mass easily separates from the skin and falls off spontaneously together with the dirt. Such a skin cleaning system is highly preferable especially under difficult conditions, because it is not necessary to use any other auxiliary means, like water, rag and the like, to achieve the cleaning effect. After application of the composition the skin is clean and dry. Moreover, it is not necessary to use any mechanical abrasives in the composition and except water and alcohol also any other organic solvents to achieve sufficient cleaning effect, whereby the composition preserves good hygienic and ecological properties. When cleaning the skin, it is not necessary to use any other auxiliary medium, like water or another liquid to rinse the hands, or any other medium to remove the cleaning composition used.

Examples of Invention Embodiments

Example 1

The skin cleaning composition has been prepared by dissolving individual components in water, whereby a viscous solution having the following composition has resulted:

Example 2

Example 3

The skin cleaning composition has been prepared by dissolving individual components in water, whereby a gel having the following composition has resulted:

Example 4

Example 5

Example 6

Example 7

Example 8

Example 9

Example 10

Industrial Applicability

A composition according to the invention may be used mainly for extremely dirty hand skin.

Claims

C L A I M S

1. Skin cleaning composition, characterized in that it consists of 1 to 60 % by weight of natural and/or synthetic polymers and of a solvent up to the total amount of 100 % by weight.

2. Skin cleaning composition according to claim 1, characterized in that the solvent is water, or possibly a mixture of water and of a monobasic alcohol where the ratio monobasic alcohol : water is from 1 : 6 to 3 : 1.

3. Skin cleaning composition according to claims 1 and 2, characterized in that the natural and synthetic polymers are chosen from a group consisting of substances like polyvinylalcohol, polyvinylpyrrolidone, polyacrylic and polymetacrylic acid and soluble derivatives and copolymers thereof, natural or modified starch or soluble cellulose derivatives.

4. Skin cleaning composition according to claims 1 to 3, characterized in that it contains preserving additives, like sodium benzoate, chloroacetamide, methylparabene, butylparabene, propylparabene in the amount of 0.1 to 0.3 % by weight.

5. Skin cleaning composition according to claims 1 to 4, characterized in that it contains cosmetically active substances, like glycerine, borax, or possibly extracts of medicinal herbs in the amount of 1 to 30 % by weight.

6. Skin cleaning composition according to claims 1 to 5, characterized in that it contains ionogenic or nonionogenic tensides, like laurylethersulphate or laurylsulphate in the amount of 0.1 to 3 % by weight.

7. Skin cleaning composition according to claims 1 to 6, characterized in that it contains aromatic compositions in the amount of 0.05 to 0.5 % by weight.