MXPA00010152A - Shampoo compositions - Google Patents

Abstract

An aqueous shampoo composition comprising, in addition to water:i) at least one cleansing surfactant;ii) a cationic deposition polymer, and iii) a silicone component consisting of a blend of:(a) emulsified particles of an insoluble silicone, in which the emulsified particles of insoluble silicone are incorporated into the shampoo composition as a preformed aqueous emulsion having an average silicone particle size in the emulsion and in the shampoo composition of from 0.15 to 30 microns, and (b) microemulsified particles of an insoluble silicone, in which the microemulsified particles of insoluble silicone are incorporated into the shampoo composition as a preformed aqueous microemulsion having an average silicone particle size in the microemulsion and in the shampoo composition of less than 0.10 microns.

Description

COMPOSITIONS OF SHAMPOO FIELD OF THE INVENTION This invention relates to shampoo compositions, and more particularly, to shampoo compositions containing emulsified sihcon particles, said compositions condition the hair leaving it softer and more manageable BACKGROUND AND PREVIOUS TECHNIQUE The use of silicones as conditioning agents in cosmetic formulations is well known and widely documented in the patent literature. In general, dispersed drops of silicone oil are suspended in the composition, which is then applied to the hair to deposit the silicone material on the silicone. the body of the hair A typical method of making shampoo with silicone is described in WO 92/10162 Essentially, the silicone material is directly emulsified in the shampoo through a hot process in situ, where the shampoo mixture incorporates complete The silicon is thoroughly mixed at high temperature, pumped through a high shear mill and then cooled. Silicon can be dispersed in a first stage process with an ammonium surfactant agent and fatty alcohol to form a premix The premix is then combined with the remaining materials of the shampoo, pumped through a high shear mill, and cooled to have the final composition. A disadvantage associated with a hot spot process, as described in FIG. WO 92/10162, is that the handling of the viscose silicone oil factory is difficult in the context of a complete shampoo manufacturing operation. Another disadvantage is that special equipment is usually necessary to control the particle size of the silicon oil. during manufacture GB 2 170 216 A describes a similar process wherein the complete shampoo composition incorporating the non-volatile, insoluble silicon is subjected to shear with a high shear mixer until the silicone particles are on average with a size smaller than 2 microns in diameter The particle size distribution is then said to be approximately 2 to approve approximately 55 microns In order to solve the aforementioned problems with hot silicone on-site processing, the alternative of incorporating the silicon as a preformed aqueous emulsion has been proposed. This method has the consequence that the silicone is incorporated with a size distribution of controllable, predeterminable particle Silicone is insoluble and remains emulsified in the fully formulated shampoo composition, and in this way, the silicon processing step at high shear stress within of the fully formulated shampoo composition is not required. This also makes the manufacture of the compositions easier. A typical method for incorporating non-volatile silicone materials, insoluble in a conditioning shampoo is described in US Pat. No. 5,085,087, wherein said materials are incorporated into the shampoo composition as a preformed aqueous emulsion of average particle size of less than 2 microns. All the ingredients are mixed in a simple hot or cold process wherein the average particle size of the silicone material in the emulsion remains the same in the final shampoo composition EP 0 529 883 A1 discloses hair shampoo compositions made by an equivalent method and comprising microemulsified silicone particles having a particle size of 0 15 microns or less, for example, 0 036 microns The reduction of the particle size of the silicone also, of this Thus, it is said that it improves stability, optical properties and conditioning performance. In particular, the small particle size of these silicone microemulsions means that a suspension system (such as waxy materials, inorganic particles and / or polymeric thickeners) is not required. Also, these silicone microemulsions do not scatter light and can be used to formulate transparent products. The silicone emulsions described in US Pat. No. 5,085,087 are not microemulsions and require a suspension system in the shampoo A problem encountered with the above formulations is that the conditioner operation may be insufficient for many people, particularly in regions such as Japan and South-East Asia, where consumers want a high degree of conditioning and a feeling of "heaviness" for their hair It has now been found that the conditioning performance of the silicone in a surfactant-based shampoo composition can be significantly improved using a combination of emulsified sihcon and microemulsified silicone, in the shampoo composition. Advantageously, it has also been found that this offers a route for the improved deposition of other benefit agents such as solid active agents COMPENDIUM OF THE INVENTION The invention provides an aqueous shampoo composition, comprising, in addition to water i) at least one surfactant cleanser, n) a cationic deposition polymer, and ni) a silica component consisting of a mixture of (a) emulsified particles of an insoluble silicon, where the emulsified particles of the insoluble silicone are incorporated in the shampoo composition as a preformed aqueous emulsion having an average silicone particle size in the emulsion and in the shampoo composition of 0 to 30 microns, and (b) microemulsified particles of an insoluble silicone wherein the microemulsified particles of the silicone insoluble are incorporated into the shampoo composition as a preformed aqueous microemulsion having an average particle size in the microemulsion and the shampoo composition, of less than 0 10 microns DETAILED DESCRIPTION OF THE INVENTION Silicon Component The silicon component consists of a mixture of emulsified particles of insoluble silicone of specific average silicone particle size and of microemulsified particles of itself with insoluble of specified average silicone particle size.

The silicones are insoluble in the aqueous matrix of the shampoo composition and are thus present in emulsified and microemulsified forms, respectively, with the silicones present as dispersed particles. The particle size can be measured by a light diffusion technique. laser, using a 2600D Particle Sizer from Malvern Instruments The average particle size measurement using this technique is the "D50" value Silicones suitable for the silicone component include polydiorganosiloxanes, in particular polydimethylsiloxanes, which have the CTET designation dimethicone. The aminofunctional silicones having the amodimethicone with CTFA designation are also suitable for use in the compositions of the invention, since they are polydimethylsiloxanes. having hydroxyl end groups, which have the CTFA designation dimethiconol. Also suitable for use are silicone gums having a slight degree of entanglement, as described in, for example, WO 96/31188. These materials can impart body, volume and hair stability, as well as a good wet and dry conditioning The emulsified particles of insoluble Silicon can be of the same type of silicone as the microemulsified particles of insoluble silicone, or they can be different The emulsions and microemulsions of themselves with suitable for use in the invention They are commercially available in a pre-emulsified form. Such preformed emulsions can then be incorporated into the shampoo composition through simple mixing, which is particularly advantageous for facilitating processing. Preformed emulsions are available from suppliers of silicone oils such as Dow Corning, General Electric, Union Carbide, Wacker Chemie, Shin Etsu, Toshiba, Toyo Beauty Co, and Toray Silicone Co An aqueous emulsion is the preferred form for such emulsion Preformed In such emulsions, it is usual for the emulsion to also include at least one emulsifier in order to stabilize the silicone emulsion. Suitable emulsifiers are well known in the art and include ammonium and nonionic surfactants. Examples of ammonium surfactants used as emulsifiers for the silicone particles are alkylamphosumphonates, for example, sodium dodecylbenzenesulfonate, alkyl sulfates, for example, sodium lauryl sulfate, alkyl ether sulfates, for example, sodium laupletersulfate nEO, where n is from 1 to 20 alkylphenol sulfate ether, for example, ether octylphenolic sulfate nEO, wherein n is from 1 to 20, and sulfosuccinates, for example sodium dioctyl sulfosuccinate Examples of nonionic surfactants used as emulsifiers for the silicone particles are alkylphenol ethoxylates, for example, nonylphenols ethoxylate nEO, wherein n is from 1 to 50, alcohol ethoxylates, for example, at lauryl alcohol nEO, wherein n is from 1 to 50, ethoxylate ester, for example, polyoxyethylene monostearate, wherein the group of oxyethylene units is from 1 to 30 The viscosity of the same silicone (not the emulsion / microemulsion or the composition of final shampoo) is typically at least ,000 cst In general, it has been found that the conditioner operation increases with a high viscosity Accordingly, the viscosity of the silicone itself is preferably at least 60,000 cst, most preferably at least 500,000 cst, ideally at least 1,000,000 cst. Preferably, the viscosity does not exceed 109 cst to facilitate formulation. The viscosity can be measured through a glass capillary viscometer as further established. in the Dow Corning Corporate test, Method CTM004, July 20, 1970. The average particle size of the Sihcon emulsified in the shampoo composition is conveniently less than 20 microns, preferably less than 10 microns Ideally it varies from 0 15 to 2 microns, optimally from 0 2 to 1 miera Examples of suitable preformed emulsions include the emulsions DC2-1766, DC2-1874, and CD2-1310, all available from Dow Corning. All of these are emulsions of dimeticopol DC2-1766 and DC2-1784 each have an average silicone particle size in emulsion smaller than two microns DC2-1310 has an average particle size of about 8 microns in the emulsion. Interlaced crosslinkers in a pre-emulsified form are also available. A preferred example is the matepal available from Dow Corning as DC x2-1787, which is an entangled dimethiconol emulsion having an average silicone particle size in the emulsion of about 0 5 microns. The average silicon particle size of the microemulsified silicone in the shampoo composition is conveniently less than 0 075. Ideally it varies from 0 01 to 0 075 microns, Optimally from O 02 to O 05 micras Examples of suitable preformed microemulsions include microemulsions DC2-1865 and DC-1870, available from Dow Corning These are microemulsions of dimethiconol DC2-1865 and DC2-1870 each have a particle size of yes with average in the microemulsion less than 0 075 microns Interlaced silicone gums are also available in a pre-microemulsified form, which is advantageous for facilitating the formulation A preferred example is the material available from Dow Corning as DC X2-1391, which is a microemulsion of interlaced dimethiconol rubber having an average silicon particle size in the microemulsion of about 0 045 microns Silicon Relations It has been found that the conditioning performance of the silicone in a surfactant-based shampoo composition can be significantly promoted using a combination of emulsified sihcon and microemulsified silicon, in the shampoo composition. The weight ratio of emulsified silicone particles The microemulsified silicone particles conveniently range from • 4 1 to 1 4 Preferably, the ratio of emulsified particles of silicon to microemulsified particles of silicon varies from 3 1 to 1 3, most preferably from 2 1 to 1 1 Silicone Levels The shampoo compositions of the invention typically contain from 0.05 to 5%, preferably from 0.1 to 3%, most preferably from 0.25 to 2% by weight of emulsified particles based on the total weight of the composition. shampoo composition The level of microemulsified particles of if in the shampoo compositions of the invention is typically from 0 to %, preferably 0-1 to 3%, most preferably 0-25 to 2% by weight of microemulsified silicone particles based on the total weight of the shampoo composition The total amount of silica (emulsified particles and mycoemulsified particles) incorporated in the shampoo compositions of the invention depends on the level of conditioning desired and the material used. A preferred amount is from 0.01 to about 10% by weight based on the total weight of the shampoo composition, although these limits are not absolute. lower limit is determined by the minimum level to obtain conditioning and the upper limit by the maximum level to avoid making hair and / or skin unacceptably greasy. It has been found that a total amount of silicone from 0 3 to 5%, of preference of 0 5 to 3% by weight, based on the total weight of the shampoo composition, is an adequate level Surface Cleaner Agent The shampoo compositions of the invention comprise one or more surfactant cleansers, which are cosmetically acceptable and suitable for topical application to the hair. Other surfactants may be present as an additional ingredient for cleaning purposes if not provided as an emulsifier for the silicone component. It is preferred that the shampoo compositions of the invention comprise at least one additional surfactant (in addition to that used as that emulsifier for the silicone component) to provide a cleaning benefit. Suitable surface-active cleansing agents, which may be used individually or in combination, are selected from surface-active agents. ammonium, amphoteric and zwiteponic, and mixtures thereof The surface active agent cleaner can be the same surfactant agents as the emulsifier, or it can be different Examples of ammonium surfactants are alkyl sulphates, alkyl ether sulphates, alkalisulfonates, alkan oiliseionates, alkyl succinates, alkyl sulfosuccinates, N-alkyl sarcosinates, alkyl phosphates, alkyl ether phosphates, alkyl ether carboxylates, and alpha-olefin sulfonates, especially their sodium, magnesium, ammonium and mono, di and tpetapolamine salts The alkyl and acyl groups They generally contain 8 to 18 carbon atoms and can be unsaturated. The alkyl ether sulphates, alkyl ether phosphates and alkyl ether carboxylates can contain from 1 to 10 units of ethylene oxide or propylene oxide per molecule.

Typical anionic surfactants for use in the shampoos of the invention include sodium oleyl succinate, ammonium lapsul sulfosuccinate, sodium dodecylbepul- sulphonate ammonium sulphate, tpetanolamine dodecylbenzenesulfonate, sodium cocoylisotianate, sodium la- setionate and N-laupl sarcosmate. Sodium The most preferred ammonium surfactants are sodium laupl sulfate, tpetanolamine monolauryl phosphate, sodium laupl ether sulfate 1EO, 2EO and 3EO, ammonium laupl sulfate and lau pl ether sulfate 1EO, 2EO and 2EO Examples of zwitterionic amphoteric surfactants include oxides of alkylamine, alkylbetaines, alkyl amidopropylbetaines, alkylsulfobetams (sultaine), alkyl ginates, alkyl carboxyglycinates, alkyl amphipropionates, alkyl amphiphilinates, alkyl amidopropyl hydroxysultams, acyltaurates and acylglutamates in which the alkyl and acyl groups have from 8 to 19 carbon atoms amphoteric and zw surfactants Typical isophones for use in the shampoos of the invention include laupl amine oxide, cocodimethylsulfopropylbetaine and preferably laupl betaine, cocoamidopropylbetaine and sodium cocoamphopropionate. The shampoo composition also includes co-surfactants, to help impart aesthetic, physical or cleansing properties to the composition A preferred example is a nonionic surfactant, which can be included in an amount of up to 5% by weight based on the total weight of the shampoo composition For example, the representative nonionic surfactants that can be included in the shampoo compositions of the invention include condensation products of straight or straight chain alcohols or phenols, primary or secondary, aliphatic (C8-C18) with or alkylene oxides. , usually ethylene oxide and generally from 6 to 30 groups of ethylene oxide Other representative nonionic surfactants include mono or dialkyl alkanolamides Examples include cocomono- or diethanolamide and cocomono isopropanolamide Other nonionic surfactants which may be included in the compositions of the invention are the alkyl polyglycosides (APGs) Typically, the APG is one which comprises an alkyl group connected to (optionally through a bridge group) a block of one or more ghcosyl groups. The preferred APGs are defined by the following formula RO - (G) " wherein R is a straight or branched chain alkyl group, which may be saturated or unsaturated and G is a saccharide group R may represent an average alkyl chain length of about 5 to about 20 carbon atoms. Preferably, R represents an average alkyl chain length of about 8 to about 12 carbon atoms.

Most preferably, the value of R lies between about 9 5 and about 10 5 G can be selected from monosaccharide residues of 5 or 6 carbon atoms, and preferably is a glycoside G can be selected from the group comprising glucose, xylose, lactose , fructose, mannose and its derivatives. Preferably G is glucose. The degree of polymerization, n, can have a value from about 1 to about 10 or more. Preferably, the value of n lies on the scale from about 1 1 to about 2 Most preferably, the value of n lies on the scale of about 1 3 to about 1 5 The alkyl polyglycosides suitable for use in the invention are commercially available and include, for example, those materials identified as Ora ix NS10 ex Seppic, Plantaren 1200 and Plantaren 2000 ex Henkel The total amount of surfactant (including any co-surfactant and / or any emulsifier for the component silicone) in the shampoo compositions of the invention is generally from 0 to 50% by weight, preferably from 5 to 30%, most preferably from 10 to 25% by weight based on the total weight of the shampoo composition Cationic Deposition Polymer A cationic deposition polymer is an essential ingredient in the shampoo compositions of the invention By "deposition polymer" is meant an agent that improves the deposition of the silicone component from the shampoo composition on the intended site during use, i.e., the hair and / or the scalp The deposition polymer can be a homopolymer or can be formed from two or more types of monomers The molecular weight of the polymer will generally be between 5 000 and 10 000 000, typically at least 10 000 and preferably in the range from 10 000 to about 2 000 000. The polymers will have groups containing cationic nitrogen such as quaternary ammonium groups or protonated amino, or mixtures thereof The group containing cationic nitrogen will generally be present as a substituent in a fraction of the total monomer units of the deposition polymer. Thus, when the polymer is not a homopolymer this may contain non-cationic monomer separating units. Such polymers are described in US Pat. CTFA Cosmetic Ingredient Directory, 3rd edition The ratio of cationic to non-cationic monomer units is selected to give a polymer having a cationic charge density on the required scale Suitable cationic deposition polymers include, for example, monomer copolymers of vinyl having functionalities of cationic amine or quaternary ammonium with water-soluble monomer separators such as metacplamide, alkyl and dialkyl metacplamide, alkyl metaplato, vinylcaprolactone and vimlpyrrolidine The alkyl and dialkyl substituted monomers 1 (preferably have alkyl groups of 1 to 7 carbon atoms, most preferably alkyl groups of 1 to 3 carbon atoms Other suitable separators include vinyl ethers, vinyl alcohol, maleic anhydride, propylene glycol and ethylenic glycol Cationic amines can be amines primary, secondary or tertiary, depending on the particular species and the pH of the composition In general, secondary and tertiary amines are preferred, especially tertiary Amine-substituted vinyl monomers and amines can be polymerized in the form of amine and then converted to ammonium via quaternization The cationic deposition polymers may comprise mixtures of monomer units derived from amine and / or quaternary ammonium-substituted monomer, and / or compatible separating monomers Suitable cationic deposition polymers include, for example, copolymers of 1 -v? n? l-2-p? rrol? d? na and salt of 1 -v ? n? l-3-met? l-imidazolium (e.g., chloride salt), referred to in the industry by Cosmetic, Toiletry, and Fragrance Association, (CTFA) as pol? quatern? o-16 This material is commercially available from BASF Wyandotte Corp (Parsippany, NJ, USA) under the trade name LUVIQUAT (for example, LUVIQUAT FC 370), copolymers of 1-v? n? l-2-p? rroí? d? na and dimethylaminoethyl metacplato, called in the industry (CTFA) as pol? quatern? -11 This material is commercially available from Gaf Corporation (Wayne, NJ, USA) under the trade name of GAFQUAT (eg, GAFQUAT 755N), cationic day quaternary ammonium containing polymers including, for example, , dimethyldiallylammonium chloride, homopolymer and copolymers of acplamide and dimethyldiallylammonium chloride, referred to in the industry (CTFA) as polyquaternium 6 and polyquaternium 7, respectively, mineral acid salts of amino-alkyls esters of homo and copolymers of unsaturated carboxylic acids having 3 to 5 carbon atoms (as described in US Pat. No. 4,009,256), cationic polyacrylamides (as described in WO 95/22311) Other cationic deposition polymers that may be used include cationic polysaccharide polymers, such as cationic cellulose derivatives, cationic starch derivatives and cationic guar gum derivatives. Suitable cationic polysaccharide polymers for use in the compositions of the invention include those of the formula A-0- [RN * (R1) (R2) (R3) X], wherein A is a residual group of anhydroglucose, such as a residual group of cellulose starch or anhydroglucose R is an alkylene oxyalkylene, polyoxyalkylene group or hydroxyalkylene or combinations thereof R ', R2 and R3 independently represent alkyl, aplo, alkylamino, aplaxyl, alkoxyalkyl or alkoxyaplo groups, each group consisting of up to 18 carbon atoms The total number of carbon atoms for each cationic portion (i.e. sum of carbon atoms in R1, R2 and R3) is preferably about 20 or less, and X is an ammonium counterion. Cationic cellulose is available from Amerchol Corp (Edison, NJ, USA) in its polymer series Polymer JR ( trademark) and LR (trademark), such as hydroxyethylcellulose salts that react with trimethylammonium-substituted epoxide, referred to in industry (CTFA) as polyhydrate 10 Another type of cationic cellulose includes the epoxide-polymerized, hydroxyethylcellulose quaternary ammonium salts that react with epoxide substituted with laupldimethylammonium, referred to in industry (CTFA) as poly-ether 2 These materials are available from Amerchol Corp (Edison, NJ, US A) under the trade name of Polymer LM-200) Other suitable cationic polysaccharide polymers include quaternary nitrogen containing cellulose ethers (e.g., as described in US Patent 3,962,418), and etherified cellulose copolymers and starch (by example, as described in US Patent 3,958,581) A particularly suitable type of cationic polysaccharide polymer that can be used is a guar gum derivative cationic, such as guar hydroxypropylpmonium chloride (commercially available from Rhodia (formerly Rhone-Poulenc) in its trademark series JAGUAR) Examples are JAGUAR C13S, which has a low degree of substitution of the cationic groups and a high viscosity JAGUAR C15, which has a moderate degree of substitution and a low viscosity, JAGUAR C17 (high degree of high viscosity substitution), JAGUAR C16, which is a hydroxypropylated cationic guar derivative containing a low level of substituent groups as well as ammonium groups quaternary catiomcos, and JAGUAR 162, which is a guar gum of medium viscosity, high transparency, having a low degree of substitution Preferably, the cationic deposition polymer is selected from catulose cellulose and cationic guar derivatives The deposition polymers particularly preferred are JAGUAR C13S, JAGUAR C15, MAGUAR C17 and JAGUAR C16 and JAGUAR C162 The cationic deposition polymer will generally be present at levels from 0.001 to 5%, preferably around 0.01 to 1%, most preferably around 0.02% to 0.5% by weight based on the total weight of the shampoo composition.

Optional Ingredients Other Conditioning Agents (which are not silicone) As used herein, the term "conditioning agent" includes any material that is used to give a conditioner benefit to hair and / or skin For example, in compositions for use in hair washing such as shampoos and conditioners, suitable materials are those that provide one or more benefits in relation to brightness, softness, combing ability, handling in wet, unsightly properties, protection against damage, body, volume, styling ability and handling A preferred class of conditioning agents are peralkenyl hydrocarbon materials, used to improve the body, volume and styling ability of hair EP 567 326 and EP 498 119 describe suitable hydrocarbon pear materials to impart styling capability and improved body to the hair. Preferred materials are polusobutylene materials available from Presperse, Inc. under the trade name of PERMETHYL. The amount of per-alkenyl hydrocarbon material incorporated in the compositions of the present invention. depends on the level of improvement of desired body and volume and the specific material used A preferred amount is from 001 to about 10% by weight based on the total weight of the shampoo composition, although these limits are not absolute The lower limit is determined by the minimum level to obtain the improved body and volume effect and the upper limit by the maximum level to prevent the hair from becoming unacceptably tacky It has been found that an amount of per- alkynylhydrocarbon of from 5 to 2% by weight based on the total weight of the shampoo composition is a particularly suitable level Solid Active Agents These are a particularly preferred class of optional ingredients in the shampoo compositions of the invention Surprisingly, it has been found that the shampoo compositions of the invention can offer a route for the deposition and improved delivery of said solid active agents such as the heavy metal salts of pmdintiona especially zinc pipdinthione. These are a particularly preferred class of solid antimicrobials. and widely used in anti-dandruff shampoos The improved deposition and delivery of active agents such as zinc pipdinthione, observed with shampoo compositions of the invention means that the level of active agent solid in the shampoo composition can be reduced if desired This offers particular advantages such as a reduced cost of the formulation and an improved aesthetic appearance of the shampoo. Other suitable solid active agents include other antimicrobials such as climbazole, pyroctone-olamine, selenium sulfide and ketoconazole. These substances typically have an average particle diameter. io from about 0 2 to about 50 microns, preferably around 04 to 10 microns Antimicrobial agents such as zinc pipdinthione are generally employed in shampoo compositions in an amount of up to about 2%, for example 1 to 2% by weight based on the total weight of the shampoo composition. Advantageously, deposition and delivery Enhanced of the solid active agents such as zinc pipdinthione, which are observed in shampoo compositions of the invention, means that the level of antimicrobial agent can be reduced if desired, for example, a level of from 0 to 0 to 8%, preferably from 0 1 to 10 0 5%, optimally about 0 3% by weight based on the total weight of the shampoo composition Other suitable solid active agents include pigment particles, such as dyes or solid dyes suitable for application to hair , and metal colloids 15 Aesthetic Agents Hair treatment compositions such as shampoos are frequently found in opaque or pearly form for Improving consumer appearance 20 Examples of opacifying agents include higher fatty alcohols (eg, cetyl, stearyl, arachidyl and behenyl), solid esters (eg, cetyl palmitate, glycine laurate, esteraseide stearate-MEA), Fatty, high molecular weight amides and alkanolamides and various fatty acid derivatives such as propylene glycol and polyethylene glycol esters.

Inorganic materials used to dull the hair treatment compositions include magnesium aluminum silicate, zinc oxide and titanium dioxide. The pearling agents typically form platelet crystals, thin in the composition, which act as small mirrors. This provides the pearl luster effect Some of the opacifying agents listed above can also crystallize as pearlescent agents, depending on the medium in which they are used and the conditions employed. Typical pearlescent agents can be selected from fatty acids of 16 to 22 carbon atoms (e.g. , stearic acid, myristic acid, oleic acid and behenic acid), fatty acid esters of 16 to 22 carbon atoms with alcohols and fatty acid esters of 16 to 22 carbon atoms incorporating elements such as alkylenic glycol units. glycol alkyl, suitable may include ethylene glycol co and propylene glycol However, glycols of higher alkylene chain length can be used Higher alkylene chain length glycols include polyethylene glycol and polypropylene glycol Examples are polyethylene glycol mono and diesters of fatty acids of 16 to 22 carbon atoms, having from 1 to 7 units of ethylene oxide, and ethylene glycol esters of fatty acids of 16 to 22 carbon atoms. Preferred esters include polyethylene glycol distearates and glycerol distearates.

Examples of a commercially available polyethylene glycol distearate are EUPERLAN PK900 (ex Henkel) or GENAPOL TS (ex Hoechst) An example of an ethylene glycol distearate is EUPERLAN PK3000 (ex Henkel) Other pearlizing agents include fatty acid alkanolamides having 16 to 22 carbon atoms (for example, stearic monoethanolamide, stearic diethanolamide, stearic monoisopropanolamide and stearic monoethanolamide stearate), long chain esters of long chain fatty acids (for example stearate stearate palmitates of cetyl) glyceryl esters (for example glycemic distearate), long-chain esters of long-chain alkanolamides (for example, esteraseide stearate DEA, esterase stearate MEA), and oxides of (C18-C22) alkyl dimethylamine (eg, steamphodimethylamine oxide) Additional suitable pearls include inorganic materials such as pearlescent pigments based on a mica natural mineral An example is mica coated with titanium dioxide The particles of this material can vary in size from 2 to 150 microns in diameter In general, the smaller particles give rise to a pearly appearance, while the particles that have a Larger average diameter will result in a resplendent composition. Mica particles coated with titanium dioxide are those sold under the trade names of TIMIRON (ex Merck) or FLAMENCO (ex Mearl) The level of opaque or pearlizing agent employed in the compositions of the invention is generally from 001 to 20%, preferably from 0 01 to 0 5% by weight based on the total weight of the composition of shampoo Other Optional Ingredients The compositions of this invention may contain any other ingredients commonly used in hair treatment formulations. These other ingredients may include viscosity modifiers, preservatives, coloring agents, polyols such as glycepne and polypropylene glycol, chelating agents such as EDTA, antioxidants, fragrances and sunscreens Each of these ingredients will be present in an effective amount to achieve its purpose. In general, these optional ingredients are individually included at a level of up to about 5% by weight based on the total weight of the composition. Shampoo The present invention will now be illustrated with reference to the following non-limiting examples. All amounts given are in percent by weight based on the total weight of the shampoo composition, unless otherwise indicated.

EXAMPLE Example 1 A shampoo composition was prepared by mixing the following components in the stated amounts Component% in Weight Laupl sodium sulfate 2EO 8 0 Cocoamidopropylbetaine 4 0 Jaguar C13S (1) 0 3 Emulsion of s? L? With (2) 2 5 Silicone microemulsion < 3) 6 0 Preservative, pH adjuster, color, fragrance c s Water for 100% Example 2 A shampoo composition was prepared by mixing the following components in the stated amounts Component% in Weight Laupl sodium sulfate 2EO 12 0 Cocoamidopropylbetaine 1 0 Jaguar C13S (? 0 1 CARBOPOL 980 () 05 Emulsion of s? L? Con (5) 083 Microemulsion of silicone < 3) 1 6 Piptiona de z? Nc < 6) 0625 Sodium Chloride 20 DL-Panthenol 0 1 Vitamin E Acetate 005 Preservative, pH adjuster, color, fragrance c s Water for 100% < ? Jaguar C13S is a guar-hydroxypropylpmonium chloride available from Rhodia (formerly Rhone-Poulenc) (2) Introduced as BY22-048 of Toray Silicone Co, an emulsion (60% ai) of dimethicone (viscosity of silicone 1 million cst, average silicone particle size of 0 5 microns) (3) Introduced as DC2-1870 by Dow Corning Ltd, a microemulsion (25% ai) of dimethiconol (silicon viscosity 60,000 million cst, average silicone particle size of 0 04 micras) in ammonium / nonionic surfactant (TEA) -dodec? lbencensulfonate / Lauret-23) < 4) CARBOPOL 980 is an interlaced pohacplate available from B F Goodrich < 5) Introduced as DC2-1766 by Dow Corning Ltd, an emulsion (60% ai) of dimethiconol (Sihcon viscosity of 1 million cst, average silicone particle size of 0 5 micras) in ionic surfactant (sodium latent sulphate) sodium) < 6) Supplied as Zinc Omadine, fine particle size grade, (48% ai) from Olin Corporation

Claims (10)

1 - . 1 - An aqueous shampoo composition comprising, in addition to water 5 i) at least one surfactant cleansing agent, n) a cationic deposition polymer, and ni) a component thereof consisting of a mixture of (a) emulsified particles of an 11 with insoluble, wherein the emulsified particles of the insoluble silicone are incorporated in 10 the shampoo composition as a preformed aqueous emulsion having an average silicone particle size in the emulsion and in the shampoo composition of 0 to 30 microns, and (b) an insoluble microemulsified si-particle with the particles microemulsified insoluble silicone are 15 incorporated in the shampoo composition as a preformed aqueous microemulsion having an average silicone particle size in the microemulsion and the shampoo composition, of less than 0 10 microns

2 - A composition according to claim 1, wherein the Average silicone particle size of the 11 emón icon in the shampoo composition varies from 0 15 to 2 microns

3 - . 3 - A composition according to claim 1 or claim 2, wherein the average silicone particle size of the microemulsified silicone in the shampoo composition varies from 25 0 01 to 0 075 micras

4 - . 4 - A composition according to any of the preceding claims, wherein the weight ratio of emulsified silicon particles from microemulsified silicone particles ranges from 41 to 14, preferably from 3 1 to 1 3, most preferably 2 1 to 1 1

5 - A composition according to any of the preceding claims, wherein the total amount of silicone is from 3 to 5%, preferably from 5 to 3% by weight based on the total weight of the shampoo composition. - A composition according to any of the preceding claims, wherein the surfactant cleanser is selected from ammonium, amphotopic and zwiteponic surfactants, and mixtures thereof 7 - A composition according to any of the preceding claims, wherein the total amount of surfactant is from 10% to 25% by weight based on the total weight of the shampoo composition 8 - A composition according to any of the preceding claims, further comprising a solid active agent selected from solid antimicrobials, preferably the heavy metal salts of pipdinthione, most preferably zinc pipdinthione 9 - A composition according to claim 8, wherein the level of antimicrobial agent is from 005 to 08%, preferably from 0 1 to 05%, optimally around 03% by weight 1 based on the total weight of the shampoo composition 10 - A composition according to any of the preceding claims, wherein the cationic deposition polymer is selected from cationic cellulose and cationic guar derivatives