GB2398240A - Conditioning shampoo with large particle size emulsion of silicone - Google Patents

Abstract

An aqueous hair conditioning shampoo comprises, in addition to water (i) a surfactant component selected from anionic, amphoteric or nonionic surfactant, and mixtures thereof (ii) emulsified particles on a non-volatile silicone conditioning agent in which the average particle size of the droplets in the shampoo composition is greater than 30žm and (iii) a water insoluble suspending agent. Better deposition of the silicone conditioning agent on hair and better conditioning are possible. Also claimed is a method of conditioning the hair.

Description

1 2398240

CONDITIONING SHAMPOO

100011 This invention relates to conditioning shampoos with improved hair conditioning performance. More specifically the invention relates to a conditioning shampoo comprising water, a surfactant, emulsified particles of non-volatile silicones and a suspending agent, wherein the nonvolatile silicones are preferably of a relatively higher viscosity and the particles size of the emulsion preferably larger.

10002] Conditioning shampoos are known from the prior art. For example in US 5720964, a hair conditioning shampoo is described comprising from about 2 to 50% by weight of an anionic surfactant, from about 50 to 98% by weight of water, from 0.01 to 10% by weight of an emulsion polymerised dimethiconol nonionic conditioning polymer and from 0.01 to 5% by weight of a cationic deposition polymer having a density between 0.1 and 4 meq/g. The preferred particle size of the silicone emulsion is less than 20 micron, more preferably less than 2 micron. The polymerised dimethiconol polymer suggested in that patent has a molecular weight of over 200,000 and a viscosity greater than 1 million.

3] In US 5977038 an aqueous conditioning shampoo is disclosed comprising, in addition to water, at least one surfactant, emulsified particles of an insoluble, non-volatile silicone and a soluble cationic conditioning polymer, having a cationic charge density of about +3.0 meq/g or less, in which the emulsified particles of insoluble, non- volatile silicone are incorporated into the conditioning shampoo composition as a preformed aqueous emulsion having an average silicone particle size in the emulsion and in the conditioning shampoo composition of from 2 to 30 micron. The non-volatile silicones include polyalkyl siloxanes with a viscosity from 5 to 100,000mPa.s and silicone gums, which have a molecular weight from 200,000 upwards.

[00041 In US 4788006 is described a conditioning shampoo composition with a synthetic anionic surfactant, a dispersed, insoluble, non-volatile silicone, a xanthan gum suspending agent and water. In here the nonvolatile silicone is described as a fluid, possibly being polydimethyl siloxane with a viscosity range of 5 to 600,000mPa.s, possibly silicone gums. When mixed in the silicone is suggested to be present in particles with on average 10 micron in diameter.

100051 In US 5302658 a method is described for making large particle size emulsions wherein the particles are from 1 to 100 micron. In this specification is stated that the particle size of the emulsion has an effect on the end use in that for example for hair care applications, especially for use as conditioners, the effectiveness of the emulsion depends on the amount of silicone that is deposited onto the hair, which is linked with the destabilization or breaking of the emulsion. The silicones are further described as having a viscosity of at least 1000mPa. s and preferably at least 10,000mPa.s.

10006] There is still a need to provide more effective conditioning effects from conditioning shampoos.

100071 It has now surprisingly been found that the above need can be met by providing a conditioning shampoo in which there is a combination of a surfactant selected from the group of anionic surfactants, amphoteric surfactants, and nonionic surfactants, and mixtures of such surfactants, emulsified particles of a nonvolatile silicone conditioning agent, having an average particle size of from 2OIlm to 1 OOIlm and a water insoluble suspending agent.

100081 Accordingly, the invention provides in a first aspect a conditioning shampoo composition which comprises (i) from 0.5% to 80% by weight of a surfactant selected from the group of anionic surfactants, amphoteric surfactants, and nonionic surfactants, and mixtures of such surfactants (ii) from 0.2% to 10% by weight of emulsified particles of a non volatile silicone conditioning agent, having an average particle size of from 2OIlm to l Doom (iii) from about 0.1 % to 10% by weight of a water insoluble suspending agent.

100091 In a second aspect of the invention, there is provided a method of conditioning hair which comprises applying to the hair a composition according to the first aspect of the invention, washing and rinsing the hair with water.

[00101 A composition according to the invention comprises as essential component a surfactants which may be anionic, amphoteric or nonionic, or it may comprise a mixture of more than one of such surfactants. The surfactants would provide an acceptable level of foam on the hair during the washing process and be capable of cleaning the hair.

10011] Examples of anionic detersive surfactant which are suitable include any of the well-known anionic detersive surfactants typically used in shampoo formulations. These anionic detersive surfactants function as cleansing agents and foaming agents in the conditioning shampoo compositions of this invention. The anionic detersive surfactants are exemplified by alkali metal sulforicinates, sulfonated glyceryl esters of fatty acids such as sulfonated monoglycerides of coconut oil acids, salts of sulfonated monovalent alcohol esters such as sodium oleylisethianate, amides of amino sulfonic acids such as the sodium salt of oleyl methyl tauride, sulfonated products of fatty acids nitrites such as palmitonitrile sulfonate, sulfonated aromatic hydrocarbons such as sodium alpha-naphthalene monosulfonate, condensation products of naphthalene sulfonic acids with formaldehyde, sodium octahydroanthracene sulfonate, alkali metal alkyl sulfates such as sodium lauryl sulfate, ammonium lauryl sulfate or triethanol amine lauryl sulfate, ether sulfates having alkyl groups of 8 or more carbon atoms such as sodium lauryl ether sulfate, ammonium lauryl ether sulfate, sodium alkyl aryl ether sulfates, and ammonium alkyl aryl ether sulfates, alkylarylsulfonates having I or more alkyl groups of 8 or more carbon atoms, alkylbenzenesulfonic acid alkali metal salts exemplified by hexylbenzenesulfonic acid sodium salt, octylbenzenesulfonic acid sodium salt, decylbenzenesulfonic acid sodium salt, dodecylbenzenesulfonic acid sodium salt, cetylbenzenesulfonic acid sodium salt, and myristylbenzenesulfonic acid sodium salt, sulfuric esters of polyoxyethylene alkyl ether including CH3(CH2)6CH2O(C2H4O)2SO3H, CH3(CH2) 7CH2O(C2H4O)3.5SO3H' CH3(CH2)gCH2o(C2H4o)gSO3H' CH3(CH2)19CH2O(C2H4O) 4SO3H' and CH3(CH2)10CH2O(C2H4O)6SO3H, sodium salts, potassium salts, and amine salts of alkylnaphthylsulfonic acid. Preferably the detersive surfactant is selected from the group consisting of sodium lauryl sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate, sodium lauryl ether sulfate, and ammonium lauryl ether sulfate. The anionic detersive surfactant is present in the conditioning shampoo compositions of this invention in an amount from about 5 to 50 wt% and preferably about 5 to 25 wt% based on the total weight of the composition.

[00121 Yet other suitable anionic surfactants include sulfonated and sulfated alkyl, aralkyl, and alkaryl anionic detergents such as alkyl succinates, alkyl sulfosuccinates, and N- alkyl sarcosinates. Representative detergents are the sodium, magnesium, ammonium, and the mono-, di-, and triethanolamine salts of alkyl and aralkyl sulfates, as well as the salts of alkaryl sulfonates. The alkyl groups of the detergents should have a total of from twelve to twenty carbon atoms, and may be unsaturated. Fatty alkyl groups are preferred. The sulfates may be sulfate ethers containing one to ten ethylene oxide or propylene oxide units per molecule, with two to three ethylene oxide units.

[00131 Typical anionic detergents are sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, ammonium lauryl ether sulfate triethanolamine lauryl sulfate, sodium C14-16 olefin sulfonate, ammonium C12-15 pareth sulfate, sodium myristyl ether sulfate, ammonium lauryl ether sulfate, disodium monooleamidosulfosuccinate, ammonium lauryl sulfosuccinate, sodium dodecylbenzene sulfonate, triethanolamine dodecylbenzene sulfonate, and sodium N-lauryol sarcosinate. The most preferred anionic detergents suitable for this composition include sodium lauryl ether sulfate IEO, 2EO, and 3EO, ammonium lauryl sulfate and ammonium lauryl ether sulfate lEO, 2EO, and 3EO.

4] Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenol ethers, polyoxyethylene lauryl ethers, polyoxyethylene sorbitan monoleates, polyoxyethylene alkyl esters, polyoxyethylene sorbitan alkyl esters, polyethylene glycol, polypropylene glycol, diethylene glycol, ethoxylated trimethylnonanols, and polyoxyalkylene glycol modified polysiloxane surfactants. Nonionic surfactants suitable for use in the hair treating compositions of the present invention can be fatty acid alkanolamides and amine oxide surfactants. Representative fatty acid alkanolamides include fatty acid diethanolamides such as isostearic acid diethanolamide, lauric acid diethanolamide, capric acid diethanolamide, coconut fatty acid diethanolamide, linoleic acid diethanolamide, myristic acid diethanolamide, oleic acid diethanolamide, and stearic acid diethanolamide.

Suitable fatty acid monoethanolamides include coconut fatty acid monoethanolamide. Fatty acid monisopropanolamides which may be used are oleic acid monoisopropanolamide and lauric acid monoisopropanolamide.

5] Amine oxide nonionic surfactants suitable for use in the present invention are N-alkyl amine oxides such as N-cocodimethylamine oxide, N-lauryl dimethylamine oxide, N- myristyl dimethylamine oxide, and N-stearyl dimethylamine oxide. Suitable N-acyl amine oxides are N-cocoamidopropyl dimethylamine oxide and N- tallowamidopropyl dimethylamine oxide. N-alkoxyalkyl amine oxides such as bis(2-hydroxyethyl) C12-15 alkoxy-propylamine oxide may also be employed. The hydrophobic portion of the amine oxide surfactant should be provided by a fatty hydrocarbon chain of about ten to twenty-one carbon atoms.

l0016l Examples of the amphoteric surfactants that can be used include amino acid surfactants and betaine acid surfactants. Among the various surfactants classified as amphoteric or ampholytic which may be used are cocoamphocarboxyglycinate, cocoamphocarboxypropionate, cocoamidopropylbetaine, N-cocamidopropyldimethylglycine, and N-lauryl-Ncarboxymethyl-N-(2-hydroxyethyl)ethylenediamine. Other suitable amphoteric detergents which may be used include betaines and sultaines. Betaines may have the formula R'R"R"'N+(CH2)m COO in which R' is an alkyl group having twelve to eighteen carbon atoms and mixtures thereof; R" and R"' are lower alkyl groups of one to three carbon atoms; and m has a value of one to four. Specific compounds may include alpha (tetradecyldimethylammonio)acetate, beta-(hexadecyldiethylammonio) propionate, and gamma-(dodecyldimethylammonio)butyrate. Sultaines may have the formula R'R"R"'N+ (CH2)m SO3- in which R', R", R"', and m, are the same as defined above. Specific compounds may include 3-(dodecyldimethylammonio)-propane-1-sulfonate, and 3(tetradecyldimethylammonio)ethane- 1 -sulfonate.

10017] Preferred surfactants include trimethylnonyl polyethylene glycol ethers and polyethylene glycol ether alcohols containing linear alkyl groups having from l l to 15 such as 2,6,8-trimethyl-4nonyloxypolyethylene oxyethanol (6 EO) (sold as TergitolTMN-6 by OSi Specialties, A Witco Company, Endicott, NY), 2,6,8-trimethyl-4nonyloxypolyethylene oxyethanol (10 EO) (sold as TergitolTMN-10 by OSi Specialties, A Witco Company, Endicott, NY), alkylene-oxypolyethylene oxyethanol (C1 1-15 secondary alkyl, 9 EO) (sold as Tergitol 1 5-S-9 by OSi Specialties, A Witco Company, Endicott, NY), alkylene oxypolyethylene oxyethanol (C1 1-15 secondary alkyl, 15 EO) (sold as Tergitol1 5-S-15 by OSi Specialties, A Witco Company, Endicott, NY), octylphenoxy polyethoxy ethanols having varying amounts of ethylene oxide units such as octylphenoxy polyethoxy ethanol (40 EO) (sold as Triton X405 by Rohm and Haas Company, Philadelphia, Pa.), nonionic ethoxylated tridecyl ethers available from Emery Industries, Mauldin, S.C. under the general tradename Trycol, alkali metal salts of dialkyl sulfosuccinates available from American Cyanamid Company, Wayne, N.J. under the general tradename Aerosol, polyethoxylated quaternary ammonium salts and ethylene oxide condensation products of the primary fatty amines, available from Armak Company, Chicago, Ill. under the tradenames Ethoquad, Ethomeen, or Arquad, and polyoxyalkylene glycol modified polysiloxanes. These preferred surfactants may also be obtained from other suppliers under different tradenames.

[0018J The surfactant component is used either as a detersive for the cleaning of the hair, or as an emulsifier. If the latter, it will be selected carefully based on the compositions to be emulsified and the conditions of the composition, for example pH, concentration, desired particle size, sensitivity of the targeted public etc. This component may be used in amounts of from 0.5 to 80 percent by weight based on total composition, preferably from 2 to parts by weight, more preferably 10 to 40 parts by weight.

IOOl9] Another essential ingredient in the conditioning shampoos according to the invention are non-volatile polysiloxane conditioning agents. Suitable non-volatile polysiloxane conditioning agents include polyalkyl siloxanes. The term "non-volatile" as used herein shall mean that the materials exhibits very low or insignificant vapour pressure at ambient conditions. These are fluids, which means they are flowable, preferably having a viscosity of less than 1,000,000 mm2/s at 25 C.

lO020] The polysiloxane conditioning agent is preferably a polydiorganosiloxane, but may be a gum, can be represented by an average unit formula RaSiO 4-a/2 where each R is a C' 6alkyl, preferably methyl radical, a vinyl radical, a phenyl radical, an ethyl radical or a 3,3,3-trifluoropropyl radical and a has an average value of 1.95 to 2.005 inclusive. Preferably the polydiorganosiloxanes are essentially polydimethylsiloxanes where at least 90 percent of the total R groups are methyl radicals and the remaining R groups are vinyl, phenyl, ethyl of 3,3,3-trifluoropropyl. Small amounts of other groups can be present such as 1 or 2 percent of the total R. where such groups are other monovalent hydrocarbon groups, such as propyl, butyl, hexyl, cyclohexyl, betaphenylethyl, octadecyl and the like; other halogenated monovalent hydrocarbon radicals, such as chloromethyl, bromophenyl, .alpha.,.alpha.,. alpha.

trifluorotolyl, perfluoroheptylethyl, dichlorophenyl and the like; cyanoalkyl; alkoxy, such as, methoxy, propoxy, ethoxy, hexoxy and the like; ketoxime; halogen; hydroxyl; aminoalkyl; and acyloxy. The groups which are present in small amounts are considered as incidental and not producing any significant characteristic changes of the polydimethylsiloxanes. The polydiorganosiloxanes suitable for the present invention are essentially composed of dimethylsiloxane units with the other units being represented by monomethylsiloxane, trimethylsiloxane, methylvinylsiloxane, methylethylsiloxane, diethylsiloxane, methylphenylsiloxane, diphenylsiloxane, ethylphenylsiloxane, vinylethylsiloxane, phenylvinylsiloxane, 3,3,3trifluoropropylmethylsiloxane, dimethylphenylsiloxane, methylphenylvinylsiloxane, dimethylethylsiloxane, 3,3,3trifluoropropyldimethylsiloxane, mono-3,3,3-trifluoropropylsiloxane, aminoalkylsiloxane, monophenylsiloxane, monovinylsiloxane and the like. The polydiorganosiloxanes are well known in the art and can be obtained commercially, and are considered to be insoluble in water and may have a viscosity up to greater than 1,000,000 mm2/s at 25 C, for example 5,000, 000 mm2/s or more at 25 C, although preferably they have a viscosity below 1,OOO,OOOmm2/s at 25 C.

[00211 The preferred polysiloxanes have the general structure: R1 R1 R1 1 1 1 R1 Si-- O Si-- O Si R1 R1 R2 n R1 where n has a value to provide polymers with a viscosity in the range of about 10,000 to 1,000,000 mm2/sec at 25 C, more preferably 100,000 to 800,000 mm2/s at 25 C, most preferably from 300,000 to 600,000 mm2/s at 25 C. Each Rl is independently an alkyl radicals of 1-20 carbon atoms, preferably 1 to 6 carbon atoms, more preferably methyl, or an aryl groups such as phenyl or hydroxyl and each R2 is independently an alkyl radicals of 1-20 carbon atoms, preferably 1 to 6 carbon atoms, more preferably methyl, or an aryl groups such as phenyl. Typically, the value of n is from about 750 to about 2,500, more preferably from 1,400 to 2.000. Illustrative polysiloxanes are polydimethylsiloxane, polydiethylsiloxane, polymethylethylsiloxane, polymethylphenylsiloxane, and polydiphenylsiloxane.

Polydimethyl siloxanes having trimethyl silyl end groups are particularly preferred. These may be used separately or in combination with other polysiloxanes. The non-volatile polyalkyl siloxane fluids that may be used include, for example polydimethyl siloxanes, having the CTFA designation Dimethicone. These siloxanes are available for example from Dow Corning as DOW CORNING) 200 Fluids. The non-volatile polyalkyl siloxane fluids that may be used include also polydimethyl siloxanes having hydroxyl endgroups, having the CTFA designation Dimethiconol.

100221 The conditioning shampoo compositions of this invention contain non- volatile, generally nonionic silicone hair conditioning agents. The silicone is insoluble in aqueous shampoo compositions and exists as dispersed, insoluble particles, or emulsified droplets. The silicone hair conditioning agent comprising a non-volatile, nonionic silicone fluid may optionally also comprise a silicone gum, which is insoluble in the shampoo composition, but is soluble in the silicone fluid.

3] The polysiloxane conditioning agents will be used in the conditioning shampoo compositions hereof at levels from 0.2% to 10% by weight of the composition, more preferably from 0.3% to 8%, most preferably from 0.5% to 5%.

4] The silicone conditioning agents described above are preferably included in the conditioning shampoo compositions as a preformed emulsion, although they could be emulsified in situ. The average particle size of the emulsified silicone fluid in the conditioning shampoo composition is to be greater than 201lm, and less than 100'um, more preferably from 25 to 75pm. Particle size may be measured by means of a laser light scattering technique, using a Mastersizer Particle Sizer from Malvern instruments. The larger particle size improves the conditioning benefit of the conditioning shampoo composition on hair, especially human hair.

5] A third essential ingredient is a suspending agent. Such agents are known and are particularly beneficial in the light of the particle size of the emulsified siloxane conditioning component. A suspending agent is to be used at concentrations effective for suspending the preferred silicone conditioning agent, or other water-insoluble material, in dispersed form in the conditioning shampoo compositions. Such concentrations range from about 0.1 % to about 10%, preferably from about 0.3% to about 5.0%, by weight of the conditioning shampoo compositions. Suspending agents include crystalline suspending agents which can be categorized as acyl derivatives, long chain amine oxides, and mixtures thereof, concentrations of which range from about 0.1 % to about 5.0%, preferably from about 0.5% to about 3.0%, by weight of the conditioning shampoo compositions. These suspending agents are described in U.S. Patent 4.741,855, which description is incorporated herein by reference. These preferred suspending agents include ethylene glycol esters of fatty acids preferably having from about 16 to about 22 carbon atoms. Examples include polyacrylic acids, cross linked polymers of acrylic acid, copolymers of acrylic acid with a hydrophobic monomer, copolymers of carboxylic acid-containing monomers and acrylic esters, cross linked copolymers of acrylic acid and acrylate esters, heteropolysaccharide gums and crystalline long chain acyl derivatives. The long chain acyl derivative is desirably selected from ethylene glycol stearates, alkanolamides of fatty acids having from 16 to 22 carbon atoms and mixtures thereof. Polyacrylic acid is available commercially as Carbopol 420, Carbopol 488 or Carbopol 493. Polymers of acrylic acid cross-linked with a polyfunctional agent may also be used, they are available commercially as Carbopol 910, Carbopol 934, Carbopol 940, Carbopol 941 and Carbopol 980. An example of a suitable copolymer of a carboxylic acid containing a monomer and acrylic acid esters is Carbopol 1342. All Carbopol materials are available from Goodrich and Carbopol is a trade mark. A further suitable suspending agent is dihydrogenated tallow phthalic acid amide (available from Stepan Chemical Co. under the trademark Stepan TAB-2) 10026] More preferred are the ethylene glycol stearates, both mono and distearate, but particularly the distearate containing less than about 7% of the mono stearate. Other suitable suspending agents include alkanol amides of fatty acids, preferably having from about 16 to about 22 carbon atoms, more preferably about 16 to 18 carbon atoms, preferred examples of which include stearic monoethanolamide, stearic diethanolamide, stearic monoisopropanolamide and stearic monoethanolamide stearate. Other long chain acyl derivatives include long chain esters of long chain fatty acids (e.g., stearyl stearate, cetyl palmitate, etc.); glyceryl esters (e. g., glyceryl distearate) and long chain esters of long chain alkanol amides (e.g., stearamide diethanolamide distearate, stearamide monoethanolaTnide stearate). Long chain acyl derivatives, ethylene glycol esters of long chain carboxylic acids, long chain amine oxides, and alkanol amides of long chain carboxylic acids in addition to the preferred materials listed above may be used as suspending agents. For example, it is contemplated that suspending agents with long chain hydrocarbyls having C8-C22 chains may be used. Other long chain acyl derivatives suitable for use as suspending agents include N,N- dihydrocarbyl amido benzoic acid and soluble salts thereof (e.g., Na, K), particularly N,N-di(hydrogenated) C16, C 18 and tallow amido benzoic acid species of this family, which are commercially available from Stepan Company (Northfield, Illinois, USA). Examples of suitable long chain amine oxides for use as suspending agents include alkyl (C16-C22) dimethyl amine oxides, e.g., stearyl dimethyl amine oxide. Other suitable suspending agents include xanthan gum at concentrations ranging from about 0.3% to about 3%, preferably from about 0.4% to about 1.2%, by weight of the conditioning shampoo compositions. The use of xanthan gum as a suspending agent in silicone containing shampoo compositions is described, for example, in U.S. Patent 4,788,006, which description is incorporated herein by reference. Combinations of long chain acyl derivatives and xanthan gum may also be used as a suspending agent in the conditioning shampoo compositions. Such combinations are described in U.S. Patent 4,704,272, which description is incorporated herein by reference.

Other suitable suspending agents include carboxyvinyl polymers.

10027] Preferred among these polymers are the copolymers of acrylic acid crosslinked with polyallylsucrose as described in U.S. Patent 2,798,053, which description is incorporated herein by reference. Examples of these polymers include Carbopol 934, 940, 941, and 956, available from B. F. Goodrich Company. Other suitable suspending agents include primary amines having a fatty alkyl moiety having at least about 16 carbon atoms, examples of which include palmitamine or stearamine, and secondary amines having two fatty alkyl moieties each having at least about 12 carbon atoms, examples of which include dipalmitoylamine or di(hydrogenated tallow)amine. Still other suitable suspending agents include di(hydrogenated tallow)phthalic acid amide, and cross-linked maleic anhydride- methyl vinyl ether copolymer. Other suitable suspending agents may be used in the conditioning shampoo compositions, including 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, hydroxybutyl methylcellulose, hyroxypropylcellulose, hydroxypropyl methylcellulose, hydroxyethyl ethylcellulose and hydroxyethylcellulose), guar gum, polyvinyl alcohol, polyvinyl pyrrolidone, hydroxypropyl guar gum, starch and starch derivatives, and other thickeners, viscosity modifiers, gelling agents, etc. [0028] The conditioning shampoo compositions according to the invention preferably also comprise water in an amount of from 10 to80% by weight. The amount of water provided may be such that the composition is fairly concentrated, e.g. having only from 10 to 40% water by weight of the total composition. Alternatively, enough water may be provided to make a diluted version. A more concentrated version is preferred for stability reasons.

10029] Thickeners may also be used to facilitate the hand application of the composition to the hair, and are added in sufficient quantities to provide a more luxurious effect. Hair care compositions with viscosities in the range of six thousand to twelve thousand centistokes measured at 25 C, are generally sufficient. Representative thickening agents which may be used are sodium alignate; gum arable; guar gum; hydroxypropyl guar gum; cellulose derivatives such as methylcellulose, hydroxypropyl methylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose; starch and starch derivatives such as hydroxyethylamylose and starch amylose; locust bean gum; electrolytes such as sodium chloride and ammonium chloride; saccharides such as fructose and glucose; and derivatives of saccharides such as PEG-120 methyl glucose dioleate.

10030] Other optional ingredients for conditioning shampoos according to the invention include fragrances, preservatives, vitamins, ceramides, amino-acid derivatives, liposomes, polyols, such as glycerine and propylene glycol and botanicals (plant extracts) and additional conditioning agents such as quaternary polymers or silicone materials. Other additives can include, depending on the use, glycols, vitamins A and E in their various forms, sunscreen agents, humectants, emollients, occlusive agents, and esters. Other optional components may be added to the conditioning shampoo compositions of this invention such as colorants, electrolytes, pH control agents, foam boosters and builders, foam stabilizers, antimicrobials, antioxidants, ultraviolet light absorbers, and medicaments. The optional ingredients can be present in an amount of up to 5 parts by weight per 100 parts by weight of conditioning shampoo compositions, but preferably are present in amount of from 0.1 to 1 part by weight per 100 parts by weight of conditioning shampoo composition. A preservative may be required and representative compounds which may be employed include formaldehyde, DMDM hydantoin, 5-bromo-5-nitro-1,3dioxane, methyl paraben, propyl paraben, sorbic acid, diazolidinyl urea, and imidazolidinyl urea.

100311 Additional conditioners may be added to the composition in the form of organic cationic conditioning agents for the purpose of providing hair grooming. Such cationic conditioning agents may include quaternary nitrogen derivatives of cellulose ethers; homopolymers of dimethyldiallyl ammonium chloride; copolymers of acrylamide and dimethyldiallyl ammonium chloride; homopolymers or copolymers derived from acrylic acid or methacrylic acid which contain cationic nitrogen functional groups attached to the polymer by ester or amide linkages; polycondensation products of N,N'-bis-(2,3- epoxypropyl)- piperazine or piperazine-bis-acrylamide and piperazine; and copolymers of vinylpyrrolidone and acrylic acid esters with quaternary nitrogen functionality. Specific materials include the various polyquats Polyquaternium-7, Polyquaternium-8, Polyquaternium-10, Polyquaternium- 11, and Polyquaternium-23. The above cationic organic polymers and others are described in more details in US Pat. No. 4240450 which is hereby incorporated by reference to further describe the cationic organicpolymers. Other categories of conditioners such as cationic surfactants such as cetyl trimethylammonium chloride, cetyl trimethylammonium bromide, and stearyltrimethylammonium chloride, may also be employed in the compositions as a cationic conditioning agent. Cationic surfactants useful in the compositions of the present invention may include those compounds which contain amino or quaternary ammonium hydrophilic moieties in the molecule which are positively charged, such as quaternary ammonium salts. Representative of the various quaternary ammonium salts which may be employed are ditallowdimethyl ammonium chloride, ditallowdimethyl ammonium methyl sulfate, dihexadecyl dimethyl ammonium chloride, di(hydrogenated tallow) dimethyl ammonium chloride, dioctadecyl dimethyl ammonium chloride, dieicosyl dimethyl ammonium chloride, didocosyl dimethyl ammonium chloride, di(hydrogenated tallow) dimethyl ammonium acetate, dihexadecyl dimethyl ammonium acetate, disallow dipropyl ammonium phosphate, disallow dimethyl ammonium nitrate, di(coconutalkyl) dimethyl ammonium chloride, and stearyl dimethyl benzyl ammonium chloride.

2] The conditioning shampoo compositions may be prepared by simply mixing all ingredients together, and stirring them thoroughly. Heat may be applied to improve the dispersion of the ingredients. Alternatively the ingredients may be provided together with some in pre-emulsified form, and then merely mixed. This is the preferred way.

[00331 The conditioning shampoo compositions of this invention may be in the form of a gel, paste, or a freely pourable liquid. The conditioning shampoo compositions of this invention can be used on the hair of humans or animals to cleanse and improve the appearance of their coats, respectively. The conditioning shampoo compositions of this invention are expected to be used by the usual method of adding the conditioning shampoo to the hair, massaging it into the hair and removing the shampoo from the hair by rinsing with water, this causing the conditioner to deposit on the hair. The conditioning shampoo compositions of the present invention are used in a conventional manner for cleansing and conditioning hair. An effective amount of the composition for cleansing and conditioning the hair is applied to the hair, that has preferably been wetted with water, and then rinsed off.

Such effective amounts generally range from about Ig to about 50g, preferably from about lg to about 20g. Application to the hair typically includes working the composition through the hair such that most or all of the hair is contacted with the composition.

4] This method for cleansing and conditioning the hair comprises the steps of: a) wetting the hair with water, b) applying an effective amount of the conditioning shampoo composition to the hair, c) shampooing the hair with the composition, and d) rinsing the shampoo composition from the hair using water to cause the conditioner to deposit on the hair. These steps can be repeated as many times as desired to achieve the desired cleansing and conditioning benefit.

Example

5] A hair conditioning shampoo was prepared by combining the ingredients Ingredient weight % Ammonium Lauryl Sulfate 35 Ammonium Laureth Sulfate 25 Cocamide Monoethanolamide 0.7 Cocoamidopropyl Betaine 5.0 Ethylene Gylcol Distearate 1.5 Di(Hydrogenated) Tallow Phthalic Acid Amide.sup (I) 1.5 Polyquaternium-47 (2) 2.0 Tricetyl Methyl ammonium Chloride 0.5 Dimethicone Emulsion (3) 3.7 Water to 100 (1) Di(Hydrogenated) Tallow Phthalic Acid Amide was included as Stepan TAB-2 Stepan) (2) Polyquaternium-47 was included as Merquat 2001 (Calgon) (3) Dimethicone Emulsion was included as Dow Corning 5-7137 Emulsion (Dow Corning) [00361 In order to evaluate the conditioning efficacy of the silicone emulsion the tresses were shampooed with the Example conditioning shampoo, and compared with tresses shampooed with a commercial conditioning shampoo. Two separate sets of hair tresses were wetted and 0.5 grams of each shampoo was applied respectively to the tresses of each set.

The conditioning shampoos were worked into each of the tresses for thirty seconds. The tresses were rinsed for thirty seconds with water and detangled by passing the wide part of a separate comb through each of the tresses one time. The tresses were then hung to dry and evaluated after twenty-four hours. Each tress was evaluated for dry feel and dry combing.

Evaluations were conducted by volunteers who assigned values to one tress of each set between one and six, with one being the worst and six the best. The average results for the dry sensory comparison between Example conditioning shampoo (Example) and the (leading) commercial conditioning shampoo (Commercial) are shown in Table I.

TABLE I

Example Commercial

Smoothness 6.0 4.5 Softness 5.6 5.4 Dry combing 5.7 5.5 The above results show a significant improvement in smoothness, and a comparable performance on softness and dry combing for the Example conditioning shampoo as compared against a leading commercial conditioning shampoo. t6

Claims (11)

1. A conditioning shampoo composition comprising (i) from 0.5% to 80% by weight of a surfactant selected from the group of anionic surfactants, amphoteric surfactants, and nonionic surfactants, and mixtures of such surfactants (ii) from 0.2% to 10% by weight of emulsified particles of a non volatile silicone conditioning agent, having an average particle size of from 20, um to 1 OOpm (iii) from about 0.1% to 10% by weight of a water insoluble suspending agent.

2. A conditioning shampoo composition according to Claim 1 comprising in addition 10 to 80 % by weight of water.

3. A conditioning shampoo according to Claim I or 2, where an anionic surfactant is chosen from the group consisting of; sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, ammonium lauryl ether sulfate triethanolamine lauryl sulfate and sodium C14-16 olefin sulfonate.

4. A conditioning shampoo according to any preceding claim, where an amphoteric surfactant is chosen from the group consisting of cocoamphocarboxyglycinate, cocoamphocarboxypropionate and cocoamidopropylbetaine.

5. A conditioning shampoo according to any preceding claim, where a nonionic surfactant is chosen from the group consisting of coconut fatty acid diethanolamide, linoleic acid diethanolamide, myristic acid diethanolamide, oleic acid diethanolamide and stearic acid diethanolamide.

6. A conditioning shampoo according to any preceding claim, where the non volatile silicone conditioning agent is a polydiorganosiloxane with an average unit formula RaSiO4 a/2 where each R is a Cal alkyl, a vinyl radical, a phenyl radical or a 3,3,3-trifluoropropyl radical and a has an average value of 1.95 to 2.005 inclusive.

7. A conditioning shampoo according to any preceding claim, where the non volatile silicone conditioning agent is dimethicone.

8. A conditioning shampoo according to Claim 7, where the dimethicone has a viscosity from 10,000 to 1,000,000 mm2/s at 25 C, more preferably from about 100,000 to 800,000, and even more preferably from 300,000 to 600, 000 mm2/s at 25 C.

9. A conditioning shampoo according to Claim 7 or 8, where the dimethicone is included in the shampoo composition as a preformed emulsion, with an average particle size of the emulsified nonionic silicone fluid in the shampoo composition of from 20pm to I OO,um, more preferably from 25pm to 75pm.

10. A conditioning shampoo according to any preceding claim, where the water insoluble suspending agent is a phthalic anhydride derivative chosen from the group consisting of N,N-di(hydrogenated) tallow phthalamic acid, N,N di(hydrogenated) tallow ammonium N,N-di(hydrogenated) tallow phthalamate.

11. A method of conditioning hair which comprises applying to the hair a composition according to any of the preceding claims followed by washing and rinsing the hair with water.