GB2177108A - Shampoo compositions - Google Patents

Abstract

Shampoos comprise a synthetic anionic surfactant, a dispersed, water insoluble, non-volatile silicone, a lauryl trimethyl quaternary ammonium salt, a suspending agent and water.

Description

SPECIFICATION Shampoo compositions and method Technical field The present invention is related to conditioning shampoos which have improved hair conditioning properties due to the inclusion of a particulartype of quaternary ammonium salt and an insoluble, non-volatile silicone.

Background of the invention Human hair becomes soiled due to its contact with the surrounding atmosphere and, to a greater extent, from sebum secreted by the head. The build-up ofthesebum causes the hairto have a dirtyfeel and an unattractive appearance. The soiling of the hair necessitates it being shampooed with frequent regularity.

Shampooing the hair cleans by removing excess soil and sebum. However, the shampooing process has disadvantages in thatthe hair is left in awet,tangled and generally unmanageable state. Avarietyof approaches have been developed to alleviate the after-shampoo problems. These rangefrom the inclusion of hair conditioning aids in shampoos to post-shampoo application of hair conditioners, i.e., hair rinses. Hair rinses typically work by depositing a polymeric film or other material onto the hair. However, such solutionsto a very prevalent problem have not beenfullysatisfactory. Foronething, hair rinses are generally liquid in nature and must be applied in a separate step following the shampooing, leftonthe hairfora length oftime, and rinsed with fresh water.This, of course, istimeconsuming and is not convenient.

While shampoos have been disclosed which contain conditioning aids, they have not been totallysatisfac- tory for a variety of reasons. One problem relates two compatibility problems between good cleaning anionic surfactants and the fatty cationic agents which are good conditioning agents. This has caused othersurfac- tants such as nonionics, amphoterics and zwitterionicsto be examined by workers in the field. Many ofthese efforts are reflected in patents issued in the conditioning shampoo area. See for example U.S. Patent 3,849,348, November 19, 1974 to Hewitt; U.S. Patent3,990,991, November 9, 1961 to Gerstein; and U.S. Patent 3,822,312, July 2, 1974 to Sato.

The use ofthese other surfactants solved many of the compatibility problems but still did not provide complete answers in all areas. For instance cationic conditioners may not deliverthe desired level of softness desired by users. Materials which can provide increased softness are silicones, both those which are soluble as well as insoluble in the shampoo matrix.

Silicones in shampoo compositions have been disclosed in a number of different publications. Such publications include U.S. Patent2,826,551, March 11, 1958 to Geen; U.S. Patent3,964,500, June22, 1976to Drakoff; U.S. Patent 4,364,837, December 1982 to Pader; British Patent849,433, September28, 1960to Woolston; U.S. Patent4,341,799, July27, 1982to Good, and U.S. Patent4,465,619, August 14, 1984to Boskamp.While these patents disclose silicone containing compositions, they also do not provide answers two all of the problems encountered in making a totally satisfactory product One unsolved problem is that of providing satisfactory static control as well as other hair conditioning properties such as softness and wet and dry combing. Although the patents listed above disclose the inclusion of cationic materials with silicones,they do not disclose or suggest using materials which allowforgood hairconditioning and stable products.

It is an object of the present invention to provide a superior conditioning shampoo containing a silicone material and a particular quaternary material which is compatible with other materials in the shampoo matrix.

It is a further object of the present invention to provide such shampoo compositions which possess good stability.

It is a further object of the present invention *o provide an improved method of shampooing and conditioning hair.

These and other objects will become readily apparent from the detailed description which follows.

Unless otherwise indicated, all percentages and ratios herein are by weight.

Summary of the invention The present invention relates two shampoo compositions comprising from about 5%to about 50% of a synthetic anionic surfactant, about 0.1% to about 10.0% of an insoluble non-volatile, dispersed silicone, about 0.1%to about4% of a lauryltrimethyl quaternaryammonium salt, about 0.4% to about of a suspending agent and water. These as well as optional components are described in detail below.

Detaileddescription The essential and optional components of the present invention are given in the following paragraphs.

Surfactant An essential component of the present compositions is a synthetic anionic surfactant. The surfactant is present at a level offrom about 5%to about 50%, preferably from about 10%to about30%.

Synthetic anionic detergents useful herein include alkyl and alkyl ether sulfates. These materials have the respective formulae ROSO3M and RO(C2H4O)xSO3M wherein R is alkyl or alkyl of about 10 to about 20 carbon atoms, xis 1 to 10, and Mis a water-soluble cation such as ammonium, sodium, potassium and triethanolamine. The alkyl ether sulfates useful in the present invention are condensation products of ethylene oxide and monohydric alcohols having about 10 to about 20 carbon atoms. Preferably, R has 14to 18 carbon atoms in both the alkyl and alkyl ether sulfates. The alcohols can be derived from fats, e.g., coconut oil or tallow, or can be synthetic.Lauryl alcohol and straight chain alcohols derived from coconut oil are preferred herein. Such alcohols are reacted with 1 to 10, and especially 3, molar proportions of ethylene oxide and the resulting mixture of molecular species, having, for example, an average of 3 moles of ethylene oxide per mole of alcohol, is sulfated and neutralized.

Specific examples of alkyl ether sulfates ofthe present invention are sodium coconut alkyl triethylene glycol ether sulfate, lithium tallow alkyl triethylene glycol ether sulfate; and sodium tallow alkyl hexaoxyethylene sulfate; lithium tallow alkyl triethylene glycol ether sulfate; and sodium tallow alkyl hexaoxyethylene sulfate.

Highly preferred alkyl ether sulphates are those comprising a mixture of individual compounds, said mixture having an average alkyl chain length offrom about 12 to 16 carbon atoms and an average degree of ethoxylation of from about 1 to 4 moles of ethylene oxide. Such a mixture also comprises from about 0 to 20% by weight C1213 compounds; from 60 to 100% byweight of C14-15-16 compounds, from about 0 to 20% byweight of C17 compounds; from about 3 to 30% by weight of compounds having a degree of ethoxylation of 0; from about45to 90% byweight of compounds having a degree ofethoxylation offrom 1 to 4; from about lotto 25% byweight of compounds having a degree ofethoxylation offrom 4to 8; and from about 0.1 to 15% by weight of compounds having a degree of ethoxylation greater than 8.

Additional examples of anionic synthetic detergents which come within the terms of the present invention are the reaction product of fatty acids esterified with isethionic acid and neutralized with sodium hydroxide where, for example, the fatty acids are derived from coconut oil; sodium or potassium salts of fatty acid amides of methyl tauride in which the fatty acids, for example, are derived from coconutoil. Otheranionic synthetic detergents of this variety are set forth in U.S. Patents2,486,921; 2,486,922; and 2,396,278.

Still other anionic synthetic detergents include the class designated as succinamates. This class includes such surface active agents as disodium N-octadecylsulfosuccinamate; tetrasodium N-(1,2-dicarboxyethyl )-N- octadecylsulfo-succinamate; diamyl ester of sodium sulfosuccinic acid: dihexyl ester of sodium sulfosuccinic acid; dioctyl esters of sodium sulfosuccinic acid.

Othersuitabie anionic detergents utilizable herein areolefin sulfonates having about 12 to about 24 carbon atoms. The term "olefin sulfonates" is used herein to mean compounds which can be produced bythe sulfonation of a-olefins by means of uncomplexed sulfurtrioxide,followed by neutralization of the acid reaction mixture in conditions such that any sultones which have been formed in the reaction are hydrolyzed to give the corresponding hydroxy-alkanesulfonates. The sulfurtrioxide can be liquid or gaseous, and is usually, but not necessarily, diluted by inert diluents, for example by liquid SO2, chlorinated hydrocarbons, etc., when used in the liquid form, or by air, nitrogen, gaseous SO2, etc., when used in the gaseousform.

The a-olefins from which the olefin sulfonates are derived are mono-olefins having 12 to 24 carbon atoms, preferably 14to 16 carbon atoms. Preferably,they are straight chain olefins. Examples of suitable 1 -olefins include 1-dodecene; 1-tetradecene; 1-hexadecene; 1-octadecene; 1-cicosene and 1 -tetraeosene.

In addition to the true alkene sulfonates and a proportion of hydroxy-alkanesulfonates, the olefin sulfonates can contain minor amounts of other materials, such as alkene disulfonates depending upon the reaction conditions, proportion of reactants, the nature of the starting olefins and impurities in the olefin stock and side reactions during the sulfonation process.

Aspecific a-olefin sulfonate mixture ofthe above type is described more fully in the U.S. Patent 3,332,880 of Philip F. Pflaumer and Adrian Kessler, issued July 25,1967, titled "Detergent Composition", the disclosure of which is incorporated herein by reference.

Another class of anionic organic detergents arethe (3-alkyloxy alkane sulfonates. These compounds have the following formula:

where R1 is a straight chain alkyl group having from 6to 20 carbon atoms, R2 is a lower alkyl group having from 1 (preferred) to 3 carbon atoms, and M is a water-soluble cation as hereinbefore described.

Specific examples of ,-alkyloxy-alkane-1 -sulfonates, or alternatively 2-alkyloxy-alkane-1 -sulfonates, having low hardness (calcium ion) sensitivity useful herein to provide superior cleaning levels under household washing conditions include: potassium- t3 -methoxydecanesulfonate, sodium 2-methoxytridecanesulfonate, potassium 2-ethoxytetradecylsulfonate, sodium 2-isopropoxyhexadecylsulfonate, lithium 2-t-butoxytetradecylsulfonate, sodium-methoxyoctadecylsulfonate, and ammonium -n-propoxydodecylsulfonate.

Another suitable class of anionic surfactants arethewater-soluble salts ofthe organic, sulfuric acid reaction products ofthe general formula: R1-5O3-M wherein R1 is chosen from the group consisting of a straight or branched chain, saturated aliphatic hydrocarbon radical having from 8to 24, preferably 12to 18, carbon atoms; and Mis a cation. Important examplesare the salts ofan organic sulfuric acid reaction productofa hydrocarbon ofthe methane series, including iso-, neo-, ineso-, and n-paraffins, having 8to 24 carbon atoms, preferably 1 2to 18 carbon atoms and asulfonating agent e.g., SO3, H2SO4, oleum, obtained according to known sulfonation methods, including bleaching and hydrolysis.Preferred are alkali metal and ammonium sulfonated C1B18n-paraffins.

Many additional nonsoap synthetic anionic surfactants are described in McCUTCHEON'S DETERGENTS AND EMULSIFIERS, 1984 ANNUAL, published by Allured Publishing Corporation, which is incorporated herein by reference. Also U.S. Patent 3,929,678, December30, 1975to Laughlin et al. discloses many other anionic as well as other surfactanttypes and is incorporated herein by reference.

The above-mentioned surfactants can be used alone or in combination in the shampoo compositions ofthe present invention. The alkyl sulfates, the ethoxylated alkyl sulfates and mixtures thereof are preferred for use herein.

Non-volatile silicone fluid The non-volatile silicone fluid may be either a polyalkyl siloxane, a polyaryl siloxane, a polyalkylaryl siloxane ora polyethersiloxane copolymerand is presentata level of from about0.1%to about 10.00% preferablyfrom about 0.5% to about 5.0%. Mixtures of these fluids may also be used and are preferred in certain executions.

The dispersed silicone particles should also be insoluble in the shampoo matrix. This is the meaning of "insoluble" as used herein before and hereinafter.

The essentially non-volatile polyalkyl siloxanes that may be used include, for example, polydimethyl siloxanes with viscosities ranging from about 5 to 600,000 centistokes at 25 C. These siloxanes are available, for example, from the General Electric Company as the Viscasil series and from Dow Corning as the Dow Corning 200 series. The viscosity can be measured by means of a glass capillary viscometer as set forth in Dow Corning Corporate Test Method CTM0004, July 20,1970. Preferably the viscosity ranges from about 350 centistokes to about 100,000 centistokes.

The essentially non-volatile polyalkylaryl siloxanes that may be used include, for example, polymethylphenylsiloxanes having viscosities of about 15 to 65 centistokes at 25"C. These siloxanes are available, for example, from the General Electric Company as SF 1075 methyl phenyl fluid orfrom Dow Corning as 556 Cosmetic Grade Fluid.

The essentially non-volatile polyether siloxane copolymerthat may be used is, for example, a polypropylene oxide modified dimethylpolysiloxane (e.g., Dow Corning DC-1248) although ethylene oxide or mixtures of ethylene oxide and propylene oxide may also be used.

References disclosing suitable silicones include the previously mentioned U.S. Patent2,826,551 to Green, U.S. Patent3,964,500, June22, 1976 to Drakoff; U.S. Patent4,364,837to Padera nd British Patent849,433to Woolston. All ofthese patents are incorporated herein by reference. Also incorporated herein by reference is Silicon Compounds distributed by Petrarch Systems, Inc., 1984. This reference provides a very good listing of suitable silicone materials. Materials found especially useful are silicone gums described by Petrarch and others.Two other references include U.S. Patent 4,152,416, May 1, 1979 to Spitzer et al. and Noll,Walter, Chemistry and Technology of Silicones, New York: Academic Press 1968. Both of these references are incorporated herein by reference. The silicone gum materials generally have a molecular weight of from about 200,000to about700,000.

Quaternary ammonium compound The quaternary ammonium compound useful in the present invention is lauryl trimethyl quaternary ammonium salt. By the term lauryl is meant pu -e C12 and alkyl distribution which have as low as 55% C12with the remainder being 22% C14, 22%C16 and 1% < C10. A preferred "lauryl" distribution dueto its availabilityand performance has 70% C12, 29% C14 and 1% 2 C16. A preferred salt is the chloride salt although other halides such as bromide and iodide or organic groups such as methyl sulfate may be used to form the salt.The quaternary compound is used at a level of from about 0.1% to about 3%, preferably from about 0.25%to about 1%.

Suspending agent Another essential component of the present compositions is a suspending agent. Two preferred materials arexanthan gum and long chain acyl derivatives as well as other long chain materials.

Xanthan gum is an agent which can be used in the present compositions to suspend the silicone fluid.This biosynthetic gum material is commercially available and is a heteropolysaccharide with a molecularweightof greater than 1 million. It contains D-glucose, D-mannoseand D-glucuronate in the molar ratio of 2.8:2.0:2.0.

The polysaccharide is partially acetylated with 4.7% acetyl.This information and other isfound in Whistler, Roy L. Editor Industrial Gums - Polysaccharides and TheirDerivatives New York: Academic Press, 1973. Kelco, a Division of Merck & Co., Inc. offers xanthan gum as KeltrolR. The gum is present at a level of from about 0.4% to about 3%, preferably from about 0.6% to about 1.2% in the compositions ofthe present invention.

Another suspending agent useful in the present compositions is any of several long chain acyl derivatives materials or mixtures of such materials. Included are ethylene glycol esters of fatty acids having from about 16 to about 22 carbon atoms. Preferred are the ethylene glycol stearates, both mono and distearate, but particularly the distearate containing less than about 7% of the mono stearate. Othersupsending agentsfound useful are alkanol amides of fatty acids, having from about 16 to about 22 carbon atoms, preferably about 1 6to 18 carbon atoms. Preferred alkanol amides are stearic monoethanolamide, stearic diethanolamide, stearic monoisopropanolamide and stearic monoethanolamide stearate.

Still other suitable non-acyl derivative suspending agents are alkyl (C1622) dimethyl amine oxides such as stearyl dimethyl amine oxide.

The suspending agent or mixtures of agent is present at a level of from about 0.4% to about 5%, preferably from about 0.5% to about 2.5%. The suspending agent serves to assist in suspending the silicone material and may also give pearlescence to the product.

Water Water is the last essential component ofthe present invention and forms the remainder of the composition.

It is generally present at a level offrom about 20%to about 95%, preferably from about 60% to about 85%.

Optional Components The shampoos herein can contain a variety of nonessential optional components suitable for rendering such compositions more acceptable. Such conventional optional ingredients are well known tothose skilled in the art, e.g., preservatives such as benzyl alcohol, methyl paraben, propyi paraben and imidazolidinyl urea; other cationic surfactants such as cetyl trimethyl ammonium chloride, tricetyl methyl ammonium chloride, stearyldimethyl benzyl ammonium chloride, and di(partially hydrogenated tallow) dimethylammonium chloride; thickeners and viscosity modifiers such as a diethanolamide of a long chain fatty acid (e.g., Cocamide MEA), amine oxides, block polymers of ethylene oxide and propylene oxide such as Pluronic F88 offered by BASF Wyandotte, fatty alcohols such as cetearyl alcohol, sodium chloride, sodium sulfate, polyvinyl alcohol, and ethyl alcohol; pH adjusting agents such as mono sodium phosphate and disodium phosphate, citric acid, succinic acid, phosphoric acid, sodium hydroxide, sodium carbonate, etc.; perfumes; dyes; and, sequestering agents such as disodium ethylenediamine tetraacetate. Such agents generally are used individually at a level of from about 0.01% to about 10%, preferably from about 0.5%to about 5.0% by weight of the composition.

Another optional ingredient and one preferred for use in certain of the compositions of this invention, is a volatile silicone or a water insoluble hydrocarbon. These agents are disclosed in U.S) Patent4,472,375, September18, 1984 to R. E. Bolich, Jr. incorporated herein by reference. These agents help disperse the higher molecularweight, non-volatile silicones in the product when such silicones are used. These agents are used at levels from about 0.1% to about 5%.

The pH ofthe present compositions is not critical and may be in the range of from 4to about 10.

Method of manufacture The present compositions can be made by preparing both a main mix and a premix. Referring to the compositions ofthe Examples, into the main mixtankare putthe ammonium lauryl sulfate, a partofthe ammonium lay ruth sulfate and the ammonium xylenesulfonate. This mixture is heated to 120+ 1 10 F with xanthan gum added nextthrough a high shear pump. Thetotal mixture is then heated to 155 5F. Finallythe glycol distearate, amide, part ofthe cetearyl alcohol, and lauryl trimethyl ammonium chloride are added followed by the color, perfume, preservative and partofthewater.

The premix is prepared by adding the remainder ofthe ammonium laureth sulfate and waterto the premix tankand heating to 155t 5"F. The remainderofthe cetearyl alcohol is then added and allowed to melt. Finally the dimethicone is added and mixed until an emulsion isformed.

The premix is mixed with the main mixthrough a static mixers, a high shear mixer and finallythrough a heat exchanger. The total product is cooled to 80"F ar d collected.

Industrial applicability The present compositions are used in a conventional mannerforcleaning hair. From about O.lg to aboutlOg of a composition is applied to hair that has been wetted, generally with water, worked through the hair and then rinsed out.

Thefollowing Examples further describe and demonstrate the preferred embodiments within the scope of the present invention. The Examples are given solelyforthe purpose of illustration and are not to be construed as limitations of the present invention as many variations thereof are possible without departing from its spirit and scope.

Examples I- IV The following compositions representative of the present invention are prepared.

Component I II III IV Ammonium Lauryl Sulfate 12.0 12.0 15.0 15.0 AmmoniumLaureth(3)Sulfate 4.0 4.0 4.0 4.0 Ammonium Xylene Sulfonate 2.2 2.2 3.0 3.0 CetearylAlcohol 1.0 0.1 0.5 0.1 Glycol Distearate 2.50 0.75 0.75 0.75 Cocamide MEA 1.00 1.00 1.00 1.00 Xanthan Gum -- 0.75 0.75 0.75 Dimethicone Fluid Viscosity 350 centistokes 1.80 1.80 1.80 1.80 Silicone Gum 1.00 1.00 1.00 1.00 Lauryl Trimethyl Ammonium Chloride 0.75 0.75 0.75 1.00 Tricetyl Methyl Ammonium Chloride -- 0.50 0.50 - Color, Perfume, Preservative, pH control agent and Water q.s. 100% These compositions all deliver good hair conditioning while also providing good cleaning.

Claims (15)

1. Ashampoo composition comprising: (a) from about 5% to about 50% of synthetic anionic surfactant or mixturesthereof; (b) from about 0.1% to about 10% of a dispersed, insoluble, non-volatile silicone or mixtures thereof; (c) from about 0.1% to about 3% of a lauryl trimethyl quaternaryammonium salt; (d) from about 0.4% to about 5% of a suspending agent (e)the remainderwater.

2. A shampoo composition according to Claim 1 wherein the surfactant is selected from the group consisting of alkyl sulfates, ethoxylated alkyl sulfates, alpha olefin sulfonates alkyl sulfonates and mixtures thereof.

3. A shampoo composition according to Claim 2 wherein the non-volatile silicone has viscosity offrom about 5 to about 600,000 centistokes at 25"C.

4. A shampoo composition according to Claim 2 wherein the quaternary ammonium salt is the chloride salt.

5. A shampoo composition according to Claim 3 wherein the surfactant is selected from the group consisting of alkyl sulfates, ethoxylated alkyl sulfates and mixtures thereof.

6. A shampoo composition according to Claim 4 wherein the non-volatile silicone is a polydimethylsiloxane.

7. A shampoo composition according to Claim 5 wherein an amide is also present in the compositions.

8. Ashampoo composition according to Claim 6wherein the surfactant is an alkyl sulfate.

9. Ashampoo composition according to Claim wherein thesurfactant is ammonium alkyl sulfate.

10. A shampoo composition according to ':maim 9 wherein the non-volatile silicone composition is a mixture of non-volatile silicones.

11. A shampoo composition according to Claim 10 wherein one of the non-volatile silicones is a silicone gum.

12. A method of shampooing hair comprising applying from about 0.1 g to about 109 of a composition according to Claim 1 to hair that has been wet with water and then rinse out.

13. A method according to Claim 12 wherein the composition is in accordance with Claim 4.

14. A method according to Claim 12 wherein the composition is in accordance with Claim 10.

15. A method according to Claim 12 wherein the composition is in accordance with Claim 11.