GB2069335A

GB2069335A - Hair Treating Compositions

Info

Publication number: GB2069335A
Application number: GB8103596A
Authority: GB
Original assignee: Wella GmbH
Current assignee: Procter and Gamble Deutschland GmbH
Priority date: 1980-02-19
Filing date: 1981-02-05
Publication date: 1981-08-26
Also published as: IT8147517A0; GB2069335B; DE3006180A1; IT1142209B

Abstract

Hair-strengthening medium based on film forming polymers, characterised in that it contains modified air-drying oils dissolved in a hydrophobic solvent. The modified air- drying oils are preferably blown oils, varnishes, stand oils, or air-drying oils modified with unsaturated monomeric binders; and the solvent is a methylpolysiloxane or isoparaffin having a bpt from 80 to 180 DEG C.

Description

SPECIFICATION Hair Strengthening Media This invention relates to means for strengthening the hair based on film-forming polymers with an added content of modified air drying oils dissolved in a hydrophobic solvent.

Media for strengthening hair commonly consist of solutions of film-forming natural, modified natural or synthetic polymers.

Some examples of natural or modified natural polymers are, shellac, alginate, gelatine, pectin, chitosan, and cellulose derivatives.

Some examples of synthetic polymers, are polyvinylpyrrolidine, polyvinylacetate, polyacrylic binders such as acrylic acid or methacrylic acid polymers, basic polymers of esters of these two acids with amino alcohols, as well as the salts or quaternary products of these basic polymers, polyacrylonitrile as well as copolymers from such binders, for example vinylpyrrolidone/vinylacetate copolymers.

In use, such a medium for strengthening the hair is distributed over the hair immediately after this has been washed and towel dried. The hair is then combed through, separated into strands, and the strands are then rolled on to curlers. Finally the curlers are fastened with a clip and thus curled hair dried under a drying hood.

The polymers contained in these media operate by forming an adherent film on the individual hairs and thus increase their firmness in the manner of a corset. As a result it is now appreciably easier to shape the hair into the desired form and to attain a stable longer-lasting style.

A disadvantage of these polymer films is, however, their brittleness, which causes, during removal of the curlers and the subsequent combing and brushing of the hair, part of this film to split off from the hair. Certainly additions of softeners can be made, which, depending on the quantity added, minimise or prevent the splitting off of the film, but the remaining film softened in this way no longer contributes to the corset-like stiffening of the hair and thus to the stability of the hairstyle.

In contrast it has now been found that media for the strengthening of the hair based on film binding polymers, but containing a modified airdrying oil dissolved in a hydrophobic solvent, do not suffer from the previously-mentioned disadvantages.

In the media according to the invention the modified air drying oils used are natural air drying oils, which: a) by means of heating and/or blowing with air or oxygen have become prepolymerised, b) by promotion of the natural autooxidation caused by the oxygen in the air by means of suitable metallic compounds, so called siccatives, have become transformed or c) have become modified with unsaturated monomeric organic binders, as well as any mixture of such modified air-drying oils.

Air-drying oils exclusively prepolymerised by heating are known as stand oils. For use in the media described herein suitable stand oils are for example wood oil stand oil, caster oil stand oil, and linseed oil stand oil. If suitable metal compounds have been added to the air drying oils in order to promote oxidation, these are then normally known as varnishes. Such metal compound, which are also called drying agents or siccatives, are for example octoates, naphthanates, resinates, tallates, and lineolates or various metal ions, and especially calcium, manganese, cobalt, and lead ions. The previouslymentioned metal compounds are contained in the varnishes alone or as mixtures, normally in a total quantity from about 1 to 5 wt%. An example of one suitable varnish for the media according to the invention is linseed oil varnish.

Air-drying oils can furthermore be prepolymerised by blowing with air or oxygen.

The temperatures used for this are about 60 to 1 500 C. Examples of such blown air-drying oils are blown linseed oil, blown wood oil, blown caster oil, blown rape oil, and blown soya oil. If stand oils or varnishes are additionally blown with air or oxygen for further cross-linking, the resulting products are known as blown stand oils or blown varnishes. Such blown stand oils and blown varnishes can be included as modified air-drying oils in the media for strengthening hair described herein. A further possibility for the modification of air-drying oils is their transformation by reactive unsaturated monomeric binders such as for example maleic anhydride, fumaric acid, itaconic acid, acrylic acid, acrolein, crotonaldehyde, styrene, alphamethylstyrene, and vinyltoluene.

The reaction temperatures used are about 1 50 to 2000 C.

The description and the properties of the aforementioned modified air drying oils are comprehensively described in the literature. As an example "Ullmann's Encyclopedia of Technical Chemistry" (1966), Volume 17, pages 694 to 738 is given.

The media according to the invention preferably contain known natural, modified natural, or synthetic film-forming polymers, of which the synthetic polymers are most preferred.

Examples of suitable synthetic polymers are polyvinylpyrrolidone, polyvinylacetate, poiyacrylic binders such as acrylic acid or methacrylic acid polymers, basic polymers of esters of these two acids with amino alcohols as well as the salts or quaternary products of these basic polymers, polyacrylonitrile and copolymers of such binders as for example vinylpyrrolidon/vinylacetate- copolymers.

The film-forming polymers are contained in the media described herein in a quantity from 0.1 to 10 wt.%, preferably 1 to 5 wt.%.

The content of modified air drying oil in the media is dependent on the content of filmforming polymers and amounts to about 5 to 60 wt.%, preferably 20 to 35 wt.%, of the content of film-forming polymers.

Suitable solvents for the film-forming polymers and the other hydrophilic components of these media are alcohols and water/alcohol mixtures, in which the alcohol is preferably ethanol or isopropanol.

The modified air drying oil is not soluble in these commonly-used solvents for hair strengthening means. As a solvent for these oils the media according to the invention contain a sufficient quantity of a hydrophobic solvent, preferably methylpolysiloxane or an isoparaffin with a boiling point from about 80 to 1 800 C. Both known hydrophobic solvents have besides the advantage that they improve the wet-combability of set hair and during the drying of the hair evaporate without leaving a residue.

Obviously these media may also contain known and conventional cosmetic additives such as for example perfume oils, vegetable oils, waxes, lanolin, lanolin derivative, bacteriacides and fungicides, dyes, pigments, softeners, substances for improving combability, and others.

Because of the simultaneous presence of a hydrophilic solvent, namely an alcohol/water mixture, and also a hydrophobic solvent, namely methylpolysiloxane or an isoparaffin, two liquid phases are formed.

The weight ratio of the hydrophobic portion to the hydrophilic portion in the media should be about 3:97 to 50:50; preferably about 10:90.

Immediately before use the hair-strengthening medium of the invention is thoroughly shaken, then about 20 ml of the resulting emulsion is distributed evenly over the washed and towel dried hair, then the hair is arranged in the usual manner and finally dried.

Because of its content of modified air-drying oils the media according to the invention make it possible to prolong retention of a hairstyle. The modified air-drying oils operate above all as softeners and thus reduce the splitting off of the polymer film from the hair resulting from the removal of curlers, the subsequent combing and brushing, as well as the styling of the hair. The modified air-drying oils then harden within about 24 hours and give additional strength to the hair surrounded by the polymer film. Because the polymer-film is scarcely damaged by the above mentioned mechanicai strains, a better and longer durability of the hair style is observed as a result of the use of the hair strengthening means described herein.

The following examples are to further illustrate the subject of the invention.

EXAMPLES Example 1 Hydrophobic Components Hexamethyldisiloxane 8.0 g Wood oil-stand oil 1.0 g 9.0g Hydrophilic Components Polyvinylpyrrolidone 3.0 g Isopropanol 45.0 g Demineralised water 43.0 g 91.or The two-phase medium of the above composition is thoroughly shaken immediately before use. 20 ml of the resulting emulsion are evenly distributed over the washed and toweldried hair. Finally the hair is arranged in the usual way and dried.

Example 2 Hydrophobic Components Mixture of Isoparaffins with a melting point of 115 to 142 or 9.0 g Linseed oil varnish 1.5 g 10.5 g Hydrophilic Components Copolymer of 50% Vinylpyrrolidone/5O% Vinylacetate 5.0 g Ethanol 45.0 g Demineralised water 30.5 g 89.5 g The use of this medium takes place as described in Example 1.

Example 3 Hydrophobic Components Hexamethyldisiloxane 8.2 g Castor oil-stand oil 1.2 g 9.4 g Hydrophilic Components Copolymer of 50% Vinylpyrrolidone/50% Vinylacetate 4.0 g Isopropanol 45.0 g Demineralised water 41.6 g 90.6 g The use of this medium takes place as described in Example 1.

Example 4 Hydrophobic Components Mixture of Isoparaffins with a boiling point of 115 to 1420C 9.0 g Wood oil-stand oil 1.5 g 10.5 g Hydrophilic Components Copolymer of 50% Vinylpyrrolidone/50% Vinylacetate 4.0 g Ethanol 45.0 g Demineralisedwater 0.1 g 89.5 g The use of this medium takes place as described in Example 1.

Example 5 Hydrophobic Components Mixture of Isoparaffins with a boiling point of 115 to 1 42 OC 9.0g Maleinate-stand oil (Linseed oil modified with maleic acid) 1.5 g 10.5 g Hydrophobic Components Copolymer of 50% Vinylpyrrolidone/50% Vinylacetate 5.0 g Ethanol 45.0 g Demineralised water 39.5 g 89.5 g The use of this medium takes place as described in Example 1.

All percentages given in the above examples represent percentages by weight.

Claims

1. Hair-strengthening medium based on film forming polymers, characterised in that it contains modified air-drying oils dissolved in a hydrophobic solvent.

2. Medium according to Claim 1, characterised in that the modified air-drying oils are blown oils, varnishes, stand oils, or air-drying oils modified with unsaturated monomeric binders, or mixtures thereof.

3. Medium according to Claim 1 or 2, characterised in that the oil is a blown linseed oil, blown wood oil, blown castor oil, blown rape oil, or blown soya oil.

4. Medium according to any of claims 1 to 3, characterised in that the oil is a linseed oil varnish.

5. Medium according to any of claims 1 to 4, characterised in that the oil is a wood oil stand oil, castor oil stand oil, or linseed oil stand oil.

6. Medium according to any of claims 1 to 5, characterised in that the oil is an air drying oil modified with maleic acid anhydride, styrene, or vinyltoluene.

7. Medium according to any of claims 1 to 6, characterised in that the film forming polymers are present in an amount from 0.1 to 10 wt.%, preferably 1 to 5 wt.%.

8. Medium according to any of claims 1 to 7, characterised in that the weight of modified air drying oils is 5 to 60%, preferably 20 to 35%, of the weight of film forming polymer.

9. Medium according to any of claims 1 to 8, characterised in that the hydrophobic solvent is at least one methylpolysiloxane or isoparaffin having a boiling point from 80 to 1 800C.