SK92897A3 - Skin cleansing composition - Google Patents

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

Technical field

The invention relates to a composition for cleaning the skin, in particular of hands, in the form of a gel or a viscous solution, particularly suitable under extreme water-shortage conditions.

BACKGROUND OF THE INVENTION

Various skin cleansers based on low and medium molecular weight detergents are well known and used at present. These are mainly soaps, shampoos, body and shower gels and the like. In addition, special cleaning agents are used, especially for excessively soiled hand skin. In most cases, the compositions are based on high performance detergents, mechanical abrasives, or organic solvents.

Many of the above formulations employ one of the natural or synthetic water-soluble polymers in their formulations.

So eg. WO 96/29979 discloses a skin cleansing and cosmetic composition based on anionic, or cationic, or nonionic surfactants and cosmetically active agents, wherein water-permeable polymers such as polyvinyl alcohol are used as an auxiliary medium to improve skin penetration into the skin. , hydroxycelluloses and combinations thereof with acrylic polymers, polyvinylpyrrolidone, modified starch, or hydroxyethylcellulose.

EP 106193 discloses the use of water-soluble cationic polymers in liquid skin cleansing compositions, which polymers act as modifiers for the foaming properties of the formulation and also contribute to pH adjustment.

EP 323798 uses water-soluble polymers, preferably polyacrylic acid, as a thickening agent in a skin care composition.

According to U.S. Pat. No. 4,774,016, some water-soluble polymers, in particular cellulose derivatives, acacia and pectins, are used as thickeners in the skin and hair wash compositions with nonionic surfactants as the active ingredient.

The patent application PV CZ 904-94 describes the use of some polyacrylamides as gelling polymers, the resulting gel being used as a base for cosmetic and pharmaceutical active substances for the treatment of the skin, in particular with a tendency to acne.

A further PV CZ 1660-93 discloses an aqueous foaming cosmetic composition for the production of shampoos, shaving foams and baths, wherein one of the water-soluble polymers such as e.g. polysaccharides, homopolymers and copolymers derived from acrylic and methacrylic acids, cellulose derivatives and the like.

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

According to EP 537737, some of the water-soluble polymers can be used as one of the components of the bath composition, which prevents the formation of various clots and agglomerates and reduces skin dryness.

According to U.S. Pat. No. 5019376, the hair conditioning composition comprises a water-soluble polymer, in particular hydroxyethylcellulose, as a thickening agent.

US 5034218 discloses the use of polyacrylic acid in conditioner shampoos where it functions as a suspending agent.

According to EP 535789, a film-forming polymer, usually a silicone wax or a high molecular weight silicone polymer, in a mutlifunctional skin care cosmetic performs the function of a protective medium for cosmetically active substances (for conditioning and moisturizing the skin).

All of the aforementioned skin cleansing, washing and cosmetic compositions which have used natural or synthetic water- or alcohol-soluble polymers have always acted as adjuvants, in particular thickeners.

The main disadvantage of the skin cleansing compositions used so far, especially of the hands, is the necessity of using an additional cleaning medium, generally water, to both dilute the composition, which is produced mostly as a concentrate, and to rinse the skin after application of such composition. This disadvantage is particularly evident in extreme conditions when water is not available.

SUMMARY OF THE INVENTION

The composition according to the invention consists of 1 to 60 wt. % of natural and / or synthetic polymers and solvent to a total amount of 100 wt.

Virtually all natural or synthetic polymers, in particular polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic and polymethacrylic acid, and their water-soluble derivatives and copolymers, natural or modified starch, water-soluble cellulose derivatives, such as e.g. hydroxyethylcellulose, methylhydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose and the like. The content of the polymer component in the formulation may vary in the range of 1 to 60% by weight, preferably 10 to 30% by weight, and some properties of the composition, for example the desired viscosity, can be achieved by combining two or more polymers. Water or a mixture of water and a monohydric alcohol in a monohydric alcohol: water ratio of 1: 3 to 6: 1 is used as solvent for the polymers.

Dissolution of the natural and / or synthetic polymer in water, optionally in a water-alcohol mixture, results in a solution or gel which, after application to the skin and slight drying, is subsequently removed by friction, absorbing impurities from the skin surface.

In order to increase the cleaning effect of the composition, inogenic or non-ionic surfactants commonly used in detergent compositions such as lauryl ether sulfate, or lauryl sulfate 0.1 to 3 wt.

The composition of the invention may also contain preservatives such as sodium benzoate or chloroacetamide or matylparaben, butylparaben, or propylparaben in an amount of 0.1 to 0.3% by weight, or fragrant compositions in an amount of 0.05 to 0.5% by weight.

When a mixture of water and lower alcohols such as e.g. ethanol, isopropanol and the like, the composition obtains increased resistance to freezing temperatures.

The mechanism of action of the composition according to the invention is that a solution of the polymer in liquid or gel form, when applied to the skin, penetrates very well into the pores of the skin and after a short time due to evaporation of a significant portion of the solvent system. when rubbing the treated skin, it also removes impurities from the skin pores and absorbs them into itself, while the mass easily separates from the skin and spontaneously falls off with the impurities. Such a skin cleansing system is particularly well suited to difficult conditions, since no additional adjuvant such as water, rag or the like is required to achieve the cleansing effect. The skin is clean and dry after application. In addition, no mechanical abrasives and no other organic solvents besides water and alcohol are required to achieve a sufficient cleaning effect, thereby maintaining good hygiene and ecological properties. When cleaning the skin, there is no need to use an additional auxiliary medium, such as water or other hand rinse liquid, or any other medium necessary to remove the cleaning agent used.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The skin cleanser was prepared by dissolving the individual components in water to form a viscous solution having the following composition;

component content y% wt. polyvinyl alcohol 25 sodium benzoate 0.04 chloroacetamide 0.16 Water 74.8

Example 2

The skin cleanser was prepared by dissolving the ingredients in water to form a viscous solution having the following composition:

component content in% wt. polyvinyl alcohol 15 ethanol, 96% 22 Water 63

Example 3

The skin cleanser was prepared by dissolving the ingredients in water to form a gel having the following composition:

component content in% wt. polyvinyl alcohol 20 natural starch 3 sodium benzoate 0.04 chloroacetamide 0.16 Water 76.8

Example 4

The skin cleanser was prepared by dissolving the ingredients in water to form a gel having the following composition:

component content in% wt. polyvinyl alcohol 15 ethanol cosmetic 25 cosmetic glycerine 10 Water 50

Example 5

The skin cleanser was prepared by dissolving the ingredients in water to form a gel having the following composition:

component content in% wt. polyvinyl alcohol 10 natural starch 4 cosmetic glycerine 12 sodium benzoate 0.04 chloroacetamide 0.16 Water 73.8

Example 6

The skin cleanser was prepared by dissolving the individual ingredients in water to form a gel having the following composition:

component content in% wt. polyvinyl alcohol 13 ethanol cosmetic 35 cosmetic glycerine 14 sodium lauryl 0.9 borax 0.2 isopropanol cosmetic 2.5 Water 34.4

Example 7

The skin cleanser was prepared by dissolving the individual ingredients in water to form a gel having the following composition:

component content in% wt. polyvinyl alcohol 15 ethanol, 96% 40 cosmetic glycerine 10 isopropanol cosmetic 3 Water 32

Example 8

The skin cleanser was prepared by dissolving the ingredients in water to form a viscous solution having the following composition:

component content in% wt. polyvinylpyrrolidone 26 sodium benzoate 0.04 chloroacetamide 0.16 Water 73.8

Example 9

The skin cleanser was prepared by dissolving the ingredients in water to form a viscous solution having the following composition:

component content in% wt polyacrylic acid 16 sodium benzoate 0.04 chloroacetamide 0.16 Water 43.8

Example 10

The skin cleanser was prepared by dissolving the individual ingredients in water to form a gel having the following composition:

component content in% wt. polyvinyl alcohol 10 ethanol cosmetic 30 cosmetic glycerine 10 sodium lauryl 0.5 hydroxyethyl 1.5 isopropanol cosmetic 3 Water 45

Industrial usability

In particular, the composition according to the invention can be used for excessively soiled hand skin.

with

Claims (7)

PATENT CLAIMS A skin cleansing composition comprising 1 to 60 wt. % of natural and / or synthetic polymers and solvent to a total amount of 100 wt. The skin cleansing composition according to claim 1, wherein the solvent is water or a mixture of water and a monohydric alcohol, wherein the ratio of monohydric alcohol: water is 1: 6 to 3: 1. The skin cleansing composition according to claim 1 and 2, characterized in that the natural and synthetic polymers are selected from the group consisting of polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic and polymethacrylic acid and soluble derivatives and copolymers thereof, natural or modified starch or soluble cellulose derivatives. The skin cleansing composition according to claims 1 to 3, characterized in that it contains preservatives such as sodium benzoate, chloroacetamide, methylparaben, butylparaben, propylparaben in an amount of 0.1 to 0.3% by weight. The skin cleansing composition according to claims 1 to 4, characterized in that it contains cosmetically active substances such as glycerin, borax or medicinal plant extracts in an amount of 1 to 30% by weight. 6. A skin cleansing composition according to any one of claims 1 to 5, characterized in that it contains ionic or non-ionic surfactants such as lauryl ether sulfate or lauryl sulfate in an amount of 0.1 to 3% by weight. The skin cleansing composition according to claims 1 to 6, characterized in that it comprises fragrant compositions in an amount of 0.05 to 0.5% by weight.