WO2013064599A1

WO2013064599A1 - Hair styling composition

Info

Publication number: WO2013064599A1
Application number: PCT/EP2012/071662
Authority: WO
Inventors: Ezat Khoshdel; Andrew Malcolm Murray; Su YUAN; Qiqing Zhang
Original assignee: Unilever Plc; Unilever N.V.; Hindustan Unilever Limited; Conopco, Inc., D/B/A Unilever
Priority date: 2011-11-04
Filing date: 2012-11-01
Publication date: 2013-05-10

Abstract

A hair styling composition comprising a charged styling polymer and an emulsion comprising: a) hydrophobically modified particles selected from the group consisting of silica, metal oxide and mixtures thereof; b) amino functionalised silicone; and c) water.

Description

HAIR STYLING COMPOSITION

The present invention relates to hair styling creams.

Hair styling compositions should meet a number of functional requirements. These include good holding ability and style retention without giving a harsh, brittle feeling to the hair. Conventional hairspray and mousse formulations are frequently volatile aqueous solvent based and therefore form highly wetting systems for hair. Coalescence of the composition droplets on the hair fibre and subsequent ethanol evaporation to leave solid polymer residue leads to a network of fibre-fibre bonds. There are, however, undesirable consequences in coating hair with polymer, manifesting in perceptions of sensory negatives such as stiffness, rigid feel, stickiness or unnatural feel. Hair styling creams can be used to mitigate the negative sensory feeling associated with styling products. However we have found hair styling creams are not stable with charged styling polymers, in particular cationic styling polymers, especially on prolonged storage.

The present invention relates to stable styling creams that include charged polymers.

Summary of the Invention

Accordingly the present invention relates to a hair styling composition comprising a cationic styling polymer and an emulsion comprising: a) hydrophobically modified particles selected from the group consisting of silica, metal oxide and mixtures thereof; b) amino fu notional ised silicone; and

c) water.

Description of the Invention

Compositions of the invention may be water in oil or oil in water based emulsions. Preferably they are oil in water based emulsions. Unless stated otherwise the viscosity of silicones can be measured by means of a glass capillary viscometer as set out further in Dow Corning Corporate Test Method CTM004, July 20 1970 at a temperature of 25°C.

Hydrophobically modified particles

The compositions of the invention comprise hydrophobically modified particles of silica or metal oxide or mixtures thereof. Preferably the hydrophobically particles comprise silica or titanium oxide, more preferably hydrophobically modified silica (silicone dioxide) .

Hydrophobically modified silica are preferred conforming to the formula:

in which R is a C₄ to C-|₈ alkyl group. Particularly preferred is hydrophobically modified silicone dioxide conforming to the formula:

Preferred silica particles are described in US 7 282 236 and made commercially available from suppliers like Evonik Degussa GmbH under the names Aerosil R812, R202, and R805. Silica having a C4 to C15 alkyl group attached to the silane are preferred. Particularly preferred is octylsilane comprising the group represented by formula above (sold under the name Aerosil R805).

The hydrophobically modified silica preferably has a primary particle size (in its dry state) from 1 nm to 100 nm, more preferably from 5 to 70nm. Primary particles sizes can be derived from Transmission Electron Microscopy according to the method described by S. Gu et al in Journal of Colloid and Interface Science 289 (2005) 419-426.

Composition of the invention preferably comprise from 0.05 to 15 wt% of the total composition of hydrophobically modified particles, more preferably from 0.1 to 10 wt%, and most preferably from 0.2 to 5 wt%.

Amino Functionalised Silicone Compositions according to the invention comprise an amino functional silicone. By "amino functionalised silicone" is meant a silicone containing at least one primary, secondary or tertiary amine group, or a quaternary ammonium group.

The primary, secondary, tertiary and/or quaternary amine groups may either form part of the main polymer chain or more preferably be carried by a side or pendant group carried by the polymeric backbone.

Suitable amino functionalised silicone polymers for use with the invention are described in US 4 185 087.

Amino functionalised silicones suitable for use in the invention will typically have a mole % amine functionality in the range of from about 0.1 to about 8.0 mole %, preferably from about 0.1 to about 5.0 mole %, most preferably from about 0.1 to about 2.0 mole %. In general the amine concentration should not exceed about 8.0 mole % since we have found that too high an amine concentration can be

detrimental to total silicone deposition and therefore conditioning performance.

In a preferred embodiment, the functionalized polymers are of the amodimethicone having the general formula:

where each R is independently H, or a Ci_-4 alkyl, preferably H;

each R¹ is independently OR or a Ci_-4 alkyl; and

each x is independently an integer from 1 to 4 and each y is greater than zero and independently an integer to yield a polymer having a molecular weight from 500 to 1 million, and preferably, from 750 to 25,000, and most preferably from 1 ,000 to 15,000. Particularly preferred are silicones comprising an amino glycol copolymer. Especially preferred is Bis (C13-C15 alkoxy) PG amodimethicone such as DC 8500 by Dow Corning . It is also within the scope of this invention for the functionalized polymer to comprise trimethylsilylamodimethicone.

Preferably the level of amino functionalised silicone polymers make up from 0.05 to 15 wt% of the total composition, preferably from 0.1 to 10 wt%, and most preferably from 0.2 to 5 wt%.

Preferably the weight ratio of hydrophobically modified particle to amino

functionalised silicone is from 3:1 to 1 :50, more preferably from 1 :1 to 1 :10. In some embodiments is preferred if a non amino functionalised silicone is present. This is preferred when a high ratio (greater than 1 :1 ) of hydrophobically modified particle to amino silicone is used, more preferably at a weight ratio of greater than 1 :1 non-amino functional silicone to amino functional silicone, most preferably at a ratio of greater than 2:1 .

Suitable non-amino functional silicones are described in the paragraphs below. Charged Styling Polymers

Compositions of the invention comprise charged styling polymers.

These polymers are preferably anionic or cationic, more preferably cationic. Preferred cationic hair styling polymers are copolymers of amino-functional acrylate monomers such as lower alkyl aminoalkyi acrylate, or methacrylate monomers such as dimethylaminoethyl methacrylate, with compatible monomers such as N- vinylpyrrolidone, vinyl caprolactam, alkyl methacrylates (such as methyl methacrylate and ethyl methacrylate) and alkyl acrylates (such as ethyl acrylate and n-butyl acrylate).

Specific examples of suitable cationic hair styling polymers are: copolymers of N-vinylpyrrolidone and dimethylaminoethyl methacrylate, available from ISP Corporation as Copolymer 845, Copolymer 937 and Copolymer 958; copolymers of N-vinylpyrrolidone and dimethylaminopropylacrylamide or

methacrylamide, available from ISP Corporation as Stylezea CC10; copolymers of N-vinylpyrrolidine and dimethylaminoethyl methacrylate; copolymers of vinylcaprolactam, N-vinylpyrrolidone and

dimethylaminoethylmethacrylate;

Polyquaternium-4 (a copolymer of diallyldimonium chloride and

hydroxyethylcellulose);

Polyquaternium-1 1 (formed by the reaction of diethyl sulphate and a copolymer of vinyl pyrrolidone and dimethyl aminoethylmethacrylate), available from ISP as Gafquata 734, 755 and 755N, and from BASF as Luviquat PQ1 1 ;

Polyquaternium-16 (formed from methylvinylimidazolium chloride and

vinylpyrrolidone), available from BASF as Luviquat FC 370, FC 550, FC 905 and HM-552; Polyquaternium-46 (prepared by the reaction of vinylcaprolactam and vinylpyrrolidone with methylvinylimidazolium methosulphate), available from BASF as Luviquat Hold. Polyquaternium-68 (the polymeric quaternary ammonium salt formed by the polymerization of vinylpyrrolidone, methacrylamide, vinylimidazole and 3-methyl-1 - vinylimidazolium methosulphate) available from BASF as Luviquat Supreme.

The polyquaternium polymers described above are particularly preferred.

Preferred anionic hair styling polymers include carboxylated polyurethanes.

Carboxylated polyurethane resins are linear, hydroxyl-terminated copolymers having pendant carboxyl groups. They may be ethoxylated and/or propoxylated at least at one terminal end. The carboxyl group can be a carboxylic acid group or an ester group, wherein the alkyl moiety of the ester group contains one to three carbon atoms. The carboxylated polyurethane resin can also be a copolymer of

polyvinylpyrrolidone and a polyurethane, having a CTFA designation

PVP/polycarbamyl polyglycol ester. Suitable carboxylated polyurethane resins are disclosed in EP-A-06191 1 1 and US Patent No. 5,000,955. Other suitable hydrophilic polyurethanes are disclosed in US Patent Nos. 3,822,238; 4,156,066; 4,156,067; 4,255,550; and 4,743,673.

Especially preferred anionic polymers are carboxylated polyurethanes such as polyurethane-1 (Luviset PUR ex BASF).

Amphoteric hair styling polymers may be used. These polymers can contain cationic groups derived from monomers such as t-butyl aminoethyl methacrylate as well as carboxyl groups derived from monomers such as acrylic acid or methacrylic acid can also be used in the present invention. One specific example of an amphoteric hair styling polymer is Amphomer® (Octylacrylamide/ acrylates/butylaminoethyl methacrylate copolymer) sold by the National Starch and Chemical Corporation. The amount of the hair styling polymer may range from 0.1 to 25%, preferably 0.5 to 20 %, more preferably 1 to 18% by weight based on total weight of the composition.

Further ingredients

The formulation may include conditioning materials such as surfactants, cationic conditioners suitable for hair, non amino functionalised silicones, oils and their emulsions. Preferably the composition comprises less than 0.1 wt% of anionic or nonionic surfactants, more preferably the composition is free of anionic and nonionic surfactants.

Suitable non amino functionalised silicones include polydiorganosiloxanes, in particular polydimethylsiloxanes which have the CTFA designation dimethicone. Also suitable for use compositions of the invention (particularly shampoos and conditioners) are polydimethyl siloxanes having hydroxyl end groups, which have the CTFA designation dimethiconol. Also suitable for use in compositions of the invention are silicone gums having a slight degree of cross-linking, as are described for example in WO 96/31 188.

The viscosity of the emulsified silicone itself (not the emulsion or the final hair conditioning composition) is typically at least 10,000 est. The viscosity of the silicone itself is preferably at least 60,000 est, most preferably at least 500,000 est, ideally at least 1 ,000,000 est. Preferably the viscosity does not exceed 10⁹ est for ease of formulation.

Emulsified silicones for use in the invention will typically have an average silicone particle size in the composition of less than 30, preferably less than 20, more preferably less than 10 microns. Most preferably the average silicone particle size of the emulsified silicone in the composition is less than 2 microns, ideally it ranges from 0.01 to 1 micron. Silicone emulsions having an average silicone particle size of < 0.15 microns are generally termed microemulsions.

Silicone particle size may be measured by means of a laser light scattering technique, using a 2600D Particle Sizer from Malvern Instruments.

Suitable silicone emulsions for use in the invention are also commercially available in a pre-emulsified form. Examples of suitable pre-formed emulsions include DC 1784, DC 1785, DC 2-1865 all available from Dow Corning. These are all emulsions/microemulsions of dimethiconol. Cross-linked silicone gums are also available in a pre-emulsified form, which is advantageous for ease of formulation. A preferred example is the material available from Dow Corning as DC X2-1787, which is an emulsion of cross-linked dimethiconol gum. A further preferred example is the material available from Dow Corning as DC X2-1391 , which is a microemulsion of cross-linked dimethiconol gum.

The total amount of silicone incorporated into compositions of the invention depends on the level of conditioning desired and the material used. A preferred amount is from 0.01 to about 15% by weight of the total composition.

Other oils can also be included in the composition such as ester emollients, polyhydric alcohol esters, wax esters and sugar ester of fatty acids. If present particularly preferred are natural ester emollients principally are based upon mono-, di- and tri- glycerides. Representative glycerides include sunflower seed oil, cottonseed oil, borage oil, borage seed oil, primrose oil, castor and hydrogenated castor oils, rice bran oil, soybean oil, olive oil, safflower oil, shea butter, jojoba oil and combinations thereof. Animal derived emollients are

represented by lanolin oil and lanolin derivatives. Amounts of the natural esters may optionally range from about 0.1 to about 20% by weight of the end use compositions. Creams according to the invention may contain a structurant or thickener, typically in an amount of from 0.01 % to 10% by weight of the total composition.

Examples of suitable structurants or thickeners are polymeric thickeners such as carboxyvinyl polymers. Particularly preferred thickeners are cationic thickening polymers, more preferred are acrylamide/methacrylate based copolymers, especially preferred are polymers of dimethylacrylamide and methacrylate in particular dimethylacrylamide/ethyltrimonium chloride methacrylate copolymer such as Tinovis CD ex BASF.

Other materials that can also be used as structurants or thickeners include those that can impart a gel-like viscosity to the composition, such as water soluble or colloidally water soluble polymers like cellulose ethers (e.g. methylcellulose,

hydroxyethylcellulose, hydroxypropylmethylcellulose and carboxymethylcellulose), guar gum, sodium alginate, gum arabic, xanthan gum, polyvinyl alcohol, polyvinyl pyrrolidone, hydroxypropyl guar gum, starch and starch derivatives, and other thickeners, viscosity modifiers, gelling agents, etc. It is also possible to use inorganic thickeners such as bentonite or laponite clays. Such styling products frequently include a carrier and further additional components. The carriers and additional components required to formulate such products vary with product type and can be routinely chosen by one skilled in the art. The following is a description of some of these carriers and additional components. The pH of the formulation is preferably from 4.5 to 8 at 25 °C. More preferably from 5 to 7.

Hair care compositions of the present invention can comprise a carrier, or a mixture of such carriers, which are suitable for application to the hair. The carriers are present at from about 0.5% to about 99.5%, preferably from about 5.0% to about 99.5%, more preferably from about 10.0% to about 98.0%, of the composition. As used herein, the phrase "suitable for application to hair" means that the carrier does not damage or negatively affect the aesthetics of hair or cause irritation to the underlying skin. Compositions according to the invention comprise a buffer or pH adjuster. Preferred buffers or pH adjusters include weak acids and bases such glycine/sodium

hydroxide, citric acid, lactic acid, succinic acid, acetic salt and salts thereof.

Frequently a mixture of buffering system is used such as sodium citrate and citric acid.

Compositions of the invention may comprise water as a solvent. Further solvents may be present. Suitable solvents include the CrC₆ alcohols, lower alkyl acetate and mixtures thereof being preferred. The solvents can also contain a wide variety of additional materials such volatile silicones such as cyclomethicone.

The compositions of the present invention may also contain adjuncts suitable for hair care. Generally such ingredients are included individually at a level of up to 2 wt&, preferably up to 1 wt% of the total composition. Suitable hair care adjuncts, include amino acids, sugars and ceramides, sun-screening agents, antidandruff agents, carboxylic acid polymer thickeners.

Compositions of the present invention are formulated into hair care compositions with hair styling claims. The compositions are preferably used to non-permanently style human hair and, more preferably, they are packaged and labeled as such. The term non-permanently mean that during the styling process the inter cystine- disulphide bonds are not broken. This means that there are preferably no reductive agents in the hair care composition. It is preferred if the products are left on hair after application and not immediately washed off (within 30 minutes of application). Such products are known as leave in compositions. Leave in styling compositions are particularly preferred. Process

A preferred process comprises forming a pre-emulsion comprising hydrophobic particles (preferably silica) dispersed in the silicone oils (aminosilicone). Preferably this phase is free of nonionic and anionic surfactants.

Especially preferred is a process for producing the composition comprising the following steps: i) forming a first phase by dispersing hydrophobic particles (preferably silica) in silicone oils (aminosilicone) ; followed by addition to water to form an emulsion.

ii) forming a second aqueous phase.

iii) combined the two phases to form a uniform structure.

Preferably the charged polymer is added to the first phase i).

The following non-limiting Examples further illustrate the preferred embodiments of the invention. Examples of the invention are illustrated by a number, comparative examples are illustrated by a letter. All percentages referred to in the examples and throughout this specification are by weight based on total weight unless otherwise indicated. Examples

Example 1 (oil in water emulsion)

Ingredient Example 1 Example 2 Example 3

Wt% Wt% Wt%

Water 60.00 60.00 60.00

EDTA 2Na 0.01 0.01 0.01

Phase I

Tinovis CD (50%)¹ 3.00 3.00 3.00

Kathon CG² 0.07 0.07 0.07

Aerosil R805³ 0.50 0.50 0.50

DC 8500⁶ 0.45 0.45 0.45

DC 200 fluid 5cst⁸ 1 .55 1 .55 1 .55

DC 200 fluid 50cst⁸ 2.50 2.50 2.50

Luviquat Supreme⁴

15.00

Phase II (20%)

Luviquat Hold (20%)⁵ 15.00

Luviset PUR (30%/ 10.00

Glycerin 2.00 2.00 2.00

Mineral Oil 70 SUS 1 .00 1 .00 1 .00

Water 2.00 2.00 2.00

Water To 100 To 100 To 100

Phase III NaOH(10%) To PH 5 -6 To PH 5-6 To PH 5-6

Perfume 0.50 0.50 0.50 1 - Dimethylacrylamide/Ethyltrimonium Chloride Methacrylate Copolymer, C10-1 1 Isoparaffin Propylene Glycol Dicaprylate/Dicaprate, PPG-1 Trideceth-6 ex BASF;

2 - methylchloroisothiazolinone, methylisothiazolinone ex The Dow chemical Company

3 - fumed silica surface treated with octylsilane ex Evonik Degussa GmbH

4 - Polyquaternium-68 ex BASF

5 - Polyquaternium-46 ex BASF

6 - Bis (C13-C15 alkoxy) PG amodimethicone ex Dow Corning

7 - polyurethane-1 ex BASF

8 - DC 200 fluid 5 est and 50 est ex Dow Corning

Formulation process:

To form phase 2 the silica particles are dispersed in the silicone oils (aminosilicone oil DC8500/DC 200 fluid 50cst and 5 est). Styling polymer, glycerine, mineral oil, water are respectively added into the oil phase by stirring. In phase 1 , the thickening polymer Tinovis CD is added into the water phase by stirring slowly followed by the remaining ingredient. Phase I and phase II are combined by light homogenization to form a uniform structure. The NaOH aqueous solution is added to adjust the pH to 5- 6 and finally the fragrances added in the final step. The process takes place under ambient temperature.

Examples A and B

Examples A and B are conventional styling creams.

The compositions above were used to style curled hair switches. After one hour curled switches treated with the composition of the invention retained their curl to a greater extent than hair treated with the comparative Examples.

Examples of the invention were stable when stored at room temperature for over one year.

Comparative Example A phase separated after 1 week's storage at room

temperature and Example B after 2 weeks at room temperature.

Claims

1 . A hair styling composition comprising a charged styling polymer and an

emulsion comprising:

a hydrophobically modified particles selected from the group consisting of silica, metal oxide and mixtures thereof;

b amino functionalised silicone; and

c water.

A hair styling composition according to claim 1 in which the hydrophobically modified particles comprise silica or titanium oxide.

A hair styling composition according to claim 1 or claim 2 in which the hydrophobically modified particles comprise silica.

A hair styling composition according to claim 3 in which the hydrophobically modified silica comprises the group

in which R is a C₄ to d₈ alkyl group.

5. A hair styling composition according to claim 4 in which the hydrophobically modified silica comprises the group:

6. A hair styling composition according to any preceding claim in which the

hydrophobically modified particle has a primary particle size from 1 nm to 100 nm.

7. A hair styling composition according to any preceding claim in which the amino functionalized silicone comprises an amino glycol copolymer.

8. A hair styling composition according to any preceding claim in which the weight ratio of hydrophobically modified particle to amino functionalised silicone is from 3:1 to 1 :50.

9. A hair styling composition according to any one of the preceding claims in

which the emulsion further comprises at least one non amino functionalised silicone.

10. A hair styling composition according to any preceding claim in which the level of hydrophobically modified particles is from 0.1 to 10 wt% of the total

composition.

1 1 A hair styling composition according to any preceding claim in which the

charged styling polymer is a cationic styling polymer.

12. A hair styling polymer according to any one of claims 1 to 1 1 in which the charged styling polymer is an anionic styling polymer.

13. A hair styling composition according to any preceding claim in which the level of amino functionalised silicone is from 0.1 to 10 wt% of the total composition.

14. A hair styling composition according to any preceding claim in which the

emulsion is an oil in water emulsion.

15. A process for manufacturing a composition as described in any of the above claims comprising the step of forming a pre-emulsion comprising hydrophobic particles dispersed in the silicone oils (aminosilicone).

16. A method of styling hair by application to the hair of a composition described in any of the above claims.