EP1011611A1 - Hair conditioning compositions - Google Patents

Abstract

Disclosed are hair conditioning compositions comprising by weight: (a) from about 0.6 % to about 9.0 % of an amidoamine; (b) from about 0.1 % to about 10.0 % of an acid selected from the group consisting of acetic acid, tartaric acid, fumaric acid, lactic acid, malic acid, succinic acid, and mixtures thereof; (c) from about 1 % to about 15 % of a high melting point compound having a melting point of at least about 25 °C selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, hydrocarbons, steroids, and mixtures thereof; and (d) water; wherein the pH of the hair conditioning composition is between from about 2.5 to about 4.5, and wherein the composition is substantially free of quaternary ammonium compounds. Further disclosed are suitable methods of making the conditioning compositions.

Description

HAIR CONDITIONING COMPOSITIONS

TECHNICAL FIELD

The present invention relates to hair conditioning compositions containing amidoamine and selected acids which provide good conditioning benefits.

BACKGROUND

Scalp and hair become soiled due to their contact with the surrounding environment and from sebum secreted from the hair follicles. The build-up of sebum and environmental soiling can cause the hair to have a dirty or greasy feel, and an unattractive appearance. In order to ameliorate these effects, it is necessary to shampoo the hair with regularity.

Shampooing the hair removes excess sebum and other environmental soiling but has disadvantages in that the hair can be left in a wet, tangled, and relatively unmanageable state. Shampooing can also result in the hair becoming dry due to the removal of natural oils or other hair moisturizing materials. After shampooing, the hair can also suffer from a perceived loss of "softness." Frequent shampooing also contributes to the phenomena of "split ends," particularly for long hair. Split ends refers to a condition wherein the ends of the hair are split into two or more shafts, resulting in a frizzy appearance.

A variety of approaches have been developed to condition the hair. These range from post-shampooing hair rinses, to leave-on hair conditioners, to the inclusion of hair conditioning components in shampoos. Although many consumers prefer the ease and convenience of a shampoo which includes conditioners, a substantial proportion of consumers prefer the more conventional conditioner formulations which are applied to the hair as a separate step from shampooing, usually subsequent to shampooing. These hair conditioners typically are formulated as a thickened product, such as a gel or cream, for ease of dispensing and application to the hair.

Despite its good conditioning benefits, quaternary ammonium compounds such as ditallowdimethylammonium have recently become less preferred for use because they may cause harshness and irritation to the hair, scalp, or skin, and because they are less biodegradable. Amidoamines have been used as alternative conditioning agents. Use of amidoamines in conditioning compositions are known in the art, such as in Japanese Patent Laid-open No. H5-271035, H5-271036, and H7-2629.

Based on the foregoing, there is a need for a hair conditioning composition which is free of quaternium ammonium compounds, and which provide good conditioning benefits in a wide range of pH. None of the existing art provides all of the advantages and benefits of the present invention.

SUMMARY

The present invention is directed to a hair conditioning composition comprising by weight: (a) from about 0.6% to about 9.0% of an amidoamine; (b) from about 0.1 % to about 10.0% of an acid selected from the group consisting of acetic acid, tartaric acid, fumaric acid, lactic acid, malic acid, succinic acid, and mixtures thereof; (c) from about 1 % to about 15% of a high melting point compound having a melting point of at least about 25°C selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, hydrocarbons, steroids, and mixtures thereof; and (d) water; wherein the pH of the hair conditioning composition is from about 2.5 to about 4.5, and wherein the composition is substantially free of quaternary ammonium compounds.

The present invention is further directed to a suitable process for providing the hair conditioning composition.

These and other features, aspects, and advantages of the present invention will become evident to those skilled in the art from a reading of the present disclosure.

DETAILED DESCRIPTION

While the specification concludes with claims particularly pointing and distinctly claiming the invention, it is believed the present invention will be better understood from the following description.

All percentages are by weight of the total composition unless otherwise indicated. All ratios are weight ratios unless otherwise indicated. All percentages, ratios, and levels of ingredients referred to herein are based on the actual amount of the ingredient, and do not include solvents, fillers, or other materials with which the ingredient may be combined as commercially available products, unless otherwise indicated. As used herein, "comprising" means that other steps and other ingredients which do not affect the end result can be added. This term encompasses the terms "consisting of and "consisting essentially of.

All cited references are incorporated herein by reference in their entireties. Citation of any reference is not an admission regarding any determination as to its availability as prior art to the claimed invention. AMIDOAMINE

The compositions of the present invention comprise by weight from about 0.6% to about 9.0%, preferably from about 1.0% to about 6.0% of an amidoamine having the following general formula:

R1 CONH (CH₂)_m N (R2)₂ wherein R-! is a fatty acid residue having from about 11 to about 24 carbon atoms, R² is an alkyl having from 1 to about 4 carbon atoms, and m is an integer from 1 to about 4.

Preferred amidoamines useful herein include stearamidopropyldimethylamine, stearamidopropyldiethylamine, stearamidoethyldiethylamine, stearamidoethyldimethylamine, palmitamidopropyldimethylamine, palmitamidopropyldiethylamine, palmitamidoethyldiethylamine, palmitamidoethyldimethylamine, behenamidopropyldimethylamine, behenamidopropyldiethylamine, behenamidoethyldiethylamine, behenamidoethyldimethylamine, arachidamidopropyldimethylamine, arachidamidopropyldiethylamine, arachidamidoethyldiethylamine, arachidamidoethyldimethylamine, and mixtures thereof; more preferably stearamidopropyldimethylamine, stearamidoethyldiethylamine, and mixtures thereof.

Commercially available amidoamines useful herein include: stearamidopropyldimethylamine with tradenames LEXAMINE S-13 available from Inolex (Philadelphia Pennsylvania, USA) and AMIDOAMINE MSP available from Nikko (Tokyo, Japan), stearamidoethyldiethylamine with a tradename AMIDOAMINE S available from Nikko, behenamidopropyldimethylamine with a tradename INCROMINE BB available from Croda (North Humberside, England), and various amidoamines with tradenames SCHERCODINE series available from Scher (Clifton New Jersey, USA). ACID

The compositions of the present invention comprise by weight from about 0.1 % to about 10.0%, preferably from about 0.2% to about 5.0%, of a selected group of acids. The acid is also included at such a level to provide the hair conditioning composition with a pH of between from about 2.5 to about 4.5. At this pH range, the gel made with the selected acids, the amidoamine mentioned above and the high melting point compounds mentioned below provides the composition to have a suitable viscosity. A suitable viscosity herein would provide the conditioning composition to be thick enough to give a favorable creamy texture, yet flowable enought that it is easily dispsensed.

The acid useful herein is selected from the group consisting of acetic acid, tartaric acid, fumaric acid, lactic acid, malic acid, succinic acid, and mixtures thereof. Preferably, the acid is selected from the group consisting of acetic acid, tartaric acid, fumaric acid, and mixtures thereof.

Commercially available acids useful herein are those having the same tradenames as their compound names including: lactic acid with a tradename UNICHEM LACA available from UPI and same tradename as the compound name from Showa Kako, malic acid with the same tradename as the compound name available from Kyowa Hakko (Tokyo, Japan) and Fuso Kagaku (Osaka, Japan), acetic acid with the same tradename as the compound name available from Denki Kagaku Kogyo, and tartaric acid, fumaric acid, and succinic acid with the same tradenames as the compound names available from Fuso Kagaku. HIGH MELTING POINT COMPOUND

The compositions of the present invention comprise by weight from about 1 % to about 15%, preferably from about 1.4% to about 10%, more preferably from about 3% to about 8% of a high melting point compound having a melting point of at least about 25°C selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, hydrocarbons, steroids, and mixtures thereof. Without being bound by theory, it is believed that these high melting point compounds cover the hair surface and reduce friction, thereby resulting in providing smooth feel on the hair and ease of combing. It is understood by the artisan that the compounds disclosed in this section of the specification can in some instances fall into more than one classification, e.g., some fatty alcohol derivatives can also be classified as fatty acid derivatives. However, a given classification is not intended to be a limitation on that particular compound, but is done so for convenience of classification and nomenclature. Further, it is understood by the artisan that, depending on the number and position of double bonds, and length and position of the branches, certain compounds having certain required carbon atoms may have a melting point of less than about 25°C. Such compounds of low melting point are not intended to be included in this section. Nonlimiting examples of the high melting point compounds are found in International Cosmetic Ingredient Dictionary, Fifth Edition, 1993, and CTFA Cosmetic Ingredient Handbook, Second Edition, 1992, both of which are incorporated by reference herein in their entirety.

The fatty alcohols useful herein are those having from about 14 to about 30 carbon atoms, preferably from about 16 to about 22 carbon atoms. These fatty alcohols can be straight or branched chain alcohols and can be saturated or unsaturated. Nonlimiting examples of fatty alcohols include, cetyl alcohol, stearyl alcohol, behenyl alcohol, and mixtures thereof.

The fatty acids useful herein are those having from about 10 to about 30 carbon atoms, preferably from about 12 to about 22 carbon atoms, and more preferably from about 16 to about 22 carbon atoms. These fatty acids can be straight or branched chain acids and can be saturated or unsaturated. Also included are diacids, triacids, and other multiple acids which meet the requirements herein. Also included herein are salts of these fatty acids. Nonlimiting examples of fatty acids include lauric acid, palmitic acid, stearic acid, behenic acid, sebacic acid, and mixtures thereof.

The fatty alcohol derivatives and fatty acid derivatives useful herein include alkyl ethers of fatty alcohols, alkoxyiated fatty alcohols, alkyl ethers of alkoxyiated fatty alcohols, esters of fatty alcohols, fatty acid esters of compounds having esterifiable hydroxy groups, hydroxy-substitued fatty acids, and mixtures thereof. Nonlimiting examples of fatty alcohol derivatives and fatty acid derivatives include materials such as methyl stearyl ether; the ceteth series of compounds such as ceteth-1 through ceteth-45, which are ethylene glycol ethers of cetyl alcohol, wherein the numeric designation indicates the number of ethylene glycol moieties present; the steareth series of compounds such as steareth-1 through 10, which are ethylene glycol ethers of steareth alcohol, wherein the numeric designation indicates the number of ethylene glycol moieties present; ceteareth 1 through ceteareth-10, which are the ethylene glycol ethers of ceteareth alcohol, i.e. a mixture of fatty alcohols containing predominantly cetyl and stearyl alcohol, wherein the numeric designation indicates the number of ethylene glycol moieties present; C1-C30 alkyl ethers of the ceteth, steareth, and ceteareth compounds just described; polyoxyethylene ethers of behenyl alcohol; ethyl stearate, cetyl stearate, cetyl palmitate, stearyl stearate, myristyl myristate, polyoxyethylene cetyl ether stearate, polyoxyethylene stearyl ether stearate, polyoxyethylene lauryl ether stearate, ethyleneglycol monostearate, polyoxyethylene monostearate, polyoxyethylene distearate, propyleneglycol monostearate, propyleneglycol distearate, trimethylolpropane distearate, sorbitan stearate, polyglyceryl stearate, glyceryl monostearate, glyceryl distearate, glyceryl tristearate, and mixtures thereof.

Hydrocarbons useful herein include compounds having at least about 20 carbons.

Steroids useful herein include compounds such as cholesterol.

High melting point compounds of a single compound of high purity are preferred. Single compounds of pure fatty alcohols selected from the group of pure cetyl alcohol, stearyl alcohol, and behenyl alcohol are highly preferred. By "pure" herein, what is meant is that the compound has a purity of at least about 90%, preferably at least about 95%. These single compounds of high purity provide good rinsability from the hair when the consumer rinses off the composition.

Commercially available high melting point compounds useful herein include: cetyl alchol, stearyl alcohol, and behenyl alcohol having tradenames KONOL series available from New Japan Chemical (Osaka, Japan), and NAA series available from NOF (Tokyo, Japan); pure behenyl alcohol having tradename 1-DOCOSANOL available from WAKO (Osaka, Japan), various fatty acids having tradenames NEO-FAT available from Akzo (Chicago Illinois, USA), HYSTRENE available from Witco Corp. (Dublin Ohio, USA), and DERMA available from Vevy (Genova, Italy); and cholesterol having tradename NIKKOL AGUASOME LA available from Nikko.

WATER

The compositions of the present invention comprise water for the remainder of the components described above, and other additional components as described hereinafter. Deionized water is preferably used. Water from natural sources including mineral cations can also be used, depending on the desired characteristic of the product. FREE OF QUATERNARY AMMONIUM COMPOUNDS

The compositions of the present invention are substantially free of quaternary ammonium compounds, which are commonly used in the art. Examples of quaternary ammonium compounds are those of the general formula:

R^— N +__R3 X^"

wherein at least one of R¹ , R², R3 and R⁴ is selected from an aliphatic group of from 8 to 30 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 22 carbon atoms, the remainder of R^ , R², R3 and R⁴ are independently an aliphatic group of from about 1 to about 22 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having from about 1 to about 22 carbon atoms; and X is a salt-forming anion such as those selected from halogen, (e.g. chloride, bromide), acetate, citrate, lactate, glycolate, phosphate, nitrate, sulfate, and alkylsulfate radicals. The aliphatic groups may contain, in addition to carbon and hydrogen atoms, ether linkages, and other groups such as amino groups. OILY COMPOUND

The compositions of the present invention may further comprise by weight from about 0.02% to about 2%, preferably from about 0.2% to about 1.5% of an oily compound having a melting point of not more than about 25° C selected from the group consisting of a first oily compound, a second oily compound, and mixtures thereof. The oily compounds useful herein may be volatile or nonvolatile. Without being bound by theory, it is believed that, the oily compounds may penetrate the hair to modify the hydroxy bonds of the hair, thereby resulting in providing softness and flexibility to the hair. The oily compound may comprise either the first oily compound or the second oily compound as described herein. Preferably, a mixture of the first oily compound and the second oily compound is used. The oily compounds of this section are to be distinguished from the high melting point compounds described above. Nonlimiting examples of the oily compounds are found in International Cosmetic Ingredient Dictionary, Fifth Edition, 1993, and CTFA Cosmetic Ingredient Handbook, Second Edition, 1992, both of which are incorporated by reference herein in their entirety. First Oily Compound

The first oily compound may be included in the compositions of the present invention. Preferably the compositions of the present invention comprise by weight from about 0.1 % to 0.75% of a first oily compound. The first oily compounds useful herein are selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, and mixtures thereof.

The fatty alcohols useful herein include those having from about 10 to about 30 carbon atoms, preferably from about 12 to about 22 carbon atoms, and more preferably from about 16 to about 22 carbon atoms. These fatty alcohols can be straight or branched chain alcohols and can be saturated or unsaturated alcohols, preferably unsaturated alcohols. Nonlimiting examples of these compounds include oleyl alcohol, palmitoleic alcohol, isostearyl alcohol, isocetyl alchol, undecanol, octyl dodecanol, octyl decanol, octyl alcohol, caprylic alcohol, decyl alcohol and lauryl alcohol.

The fatty acids useful herein include those having from about 10 to about 30 carbon atoms, preferably from about 12 to about 22 carbon atoms, and more preferably from about 16 to about 22 carbon atoms. These fatty acids can be straight or branched chain acids and can be saturated or unsaturated. Suitable fatty acids include, for example, oleic acid, linoleic acid, isostearic acid, linolenic acid, ethyl linolenic acid, ethyl linolenic acid, arachidonic acid, and ricinolic acid.

The fatty acid derivatives and fatty alcohol derivatives are defined herein to include, for example, esters of fatty alcohols, alkoxyiated fatty alcohols, alkyl ethers of fatty alcohols, alkyl ethers of alkoxyiated fatty alcohols, and mixtures thereof. Nonlimiting examples of fatty acid derivatives and fatty alcohol derivatives, include, for example, methyl linoleate, ethyl linoleate, isopropyl linoleate, isodecyl oleate, isopropyl oleate, ethyl oleate, octyldodecyl oleate, oleyl oleate, decyl oleate, butyl oleate, methyl oleate, octyldodecyl stearate, octyldodecyl isostearate, octyldodecyl isopalmitate, octyl isopelargonate, octyl pelargonate, hexyl isostearate, isopropyl isostearate, isodecyl isononanoate, Oleth-2, pentaerythritol tetraoleate, pentaerythritol tetraisostearate, trimethylolpropane trioleate, and trimethylolpropane tri isostearate. Commercially available first oily compounds useful herein include: oleyl alcohol with tradename UNJECOL 90BHR available from New Japan Chemical, pentaerythritol tetraisostearate and trimethylolpropane t isostearate with tradenames KAKPTI and KAKTTI available from Kokyu Alcohol (Chiba, Japan), pentaerythritol tetraoleate having the same tradename as the compound name available from New Japan Chemical, trimethylolpropane trioleate with a tradename ENUJERUBU TP3SO available from New Japan Chemical, various liquid esters with tradenames SCHERCEMOL series available from Scher, and hexyl isostearate with a tradename HIS and isopropryl isostearate having a tradename ZPIS available from Kokyu Alcohol. Second Oilv Compound

The second oily compound may be included in the compositions of the present invention. Preferably the compositions of the present invention comprise by weight from about 0.1% to about 0.75% of a second oily compound. The second oily compounds useful herein include straight chain, cyclic, and branched chain hydrocarbons which can be either saturated or unsaturated, so long as they have a melting point of not more than about 25°C. These hydrocarbons have from about 12 to about 40 carbon atoms, preferably from about 12 to about 30 carbon atoms, and preferably from about 12 to about 22 carbon atoms. Also encompassed herein are polymeric hydrocarbons of alkenyl monomers, such as polymers of C2-6 alkenyl monomers. These polymers can be straight or branched chain polymers. The straight chain polymers will typically be relatively short in length, having a total number of carbon atoms as described above. The branched chain polymers can have substantially higher chain lengths. The number average molecular weight of such materials can vary widely, but will typically be up to about 500, preferably from about 200 to about 400, and more preferably from about 300 to about 350. Also useful herein are the various grades of mineral oils. Mineral oils are liquid mixtures of hydrocarbons that are obtained from petroleum. Specific examples of suitable hydrocarbon materials include paraffin oil, mineral oil, dodecane, isododecane, hexadecane, isohexadecane, eicosene, isoeicosene, tridecane, tetradecane, polybutene, polyisobutene, and mixtures thereof. Preferred for use herein are hydrocarbons selected from the group consisting of mineral oil, isododecane, isohexadecane, polybutene, polyisobutene, and mixtures thereof. Commercially available second oily compounds useful herein include isododecane, isohexadeance, and isoeicosene with tradenames PERMETHYL 99A, PERMETHYL 101 A, and PERMETHYL 1082, available from Presperse (South Plainfield New Jersey, USA), a copolymer of isobutene and normal butene with tradenames INDOPOL H-100 available from Amoco Chemicals (Chicago Illinois, USA), mineral oil with tradename BENOL available from Witco, and isoparaffin with tradename ISOPAR from Exxon Chemical Co. (Houston Texas, USA). ADDITIONAL CONDITIONING AGENTS

The compositions of the present invention may further comprise additional conditioning agents. When included, additional conditioning agents are included at a level by weight of from about 0.1% to about 20.0%, preferably from about 1.0% to about 15.0%, and more preferably from about 2.0% to about 10% of the composition. Suitable conditioning agents are cationic polymers, silicones, proteins, and mixtures thereof. Cationic Polymers

Cationic polymers useful herein are those which are more or less water soluble. As used herein, the term "polymer" shall include materials whether made by polymerization of one type of monomer or made by two (i.e., copolymers) or more types of monomers. By "water soluble" cationic polymer, what is meant is a polymer which is sufficiently soluble in water to form a substantially clear solution to the naked eye at a concentration of 0.1% in water (distilled or equivalent) at 25°C. The preferred polymer will be sufficiently soluble to form a substantially clear solution at 0.5% concentration, more preferably at 1.0% concentration.

The cationic polymers hereof will generally have a weight average molecular weight which is at least about 5,000, typically at least about 10,000, and is less than about 10 million. Preferably, the molecular weight is from about 100,000 to about 2 million. The cationic polymers will generally have cationic nitrogen-containing moieties such as quaternary ammonium or cationic amino moieties, and mixtures thereof.

The cationic charge density is preferably at least about 0.1 meq/gram, more preferably at least about 1.5 meq/gram, even more preferably at least about 1.1 meq/gram, still more preferably at least about 1.2 meq/gram. Cationic charge density of the cationic polymer can be determined according to the Kjeldahl Method. Those skilled in the art will recognize that the charge density of amino-containing polymers may vary depending upon pH and the isoelectric point of the amino groups. The charge density should be within the above limits at the pH of intended use.

Any anionic counterions can be utilized for the cationic polymers so long as the water solubility criteria is met. Suitable counterions include halides (e.g., Cl, Br, I, or F, preferably Cl, Br, or I), sulfate, and methylsulfate. Others can also be used, as this list is not exclusive.

The cationic nitrogen-containing moiety will be present generally as a substituent, on a fraction of the total monomer units of the cationic hair conditioning polymers. Thus, the cationic polymer can comprise copolymers, terpolymers, etc. of quaternary ammonium or cationic amine- substituted monomer units and other non-cationic units referred to herein as spacer monomer units. Such polymers are known in the art, and a variety can be found in the CTFA Cosmetic Ingredient Dictionary, 3rd edition, edited by Estrin, Crosley, and Haynes, (The Cosmetic, Toiletry, and Fragrance Association, Inc., Washington, D.C., 1982).

Suitable cationic polymers include, for example, copolymers of vinyl monomers having cationic amine or quaternary ammonium functionalities with water soluble spacer monomers such as acrylamide, methacrylamide, alkyl and dialkyl acrylamides, alkyl and dialkyl methacrylamides, alkyl acrylate, alkyl methacrylate, vinyl caprolactone, and vinyl pyrrolidone. The alkyl and dialkyl substituted monomers preferably have C-| - C7 alkyl groups, more preferably C-| - C3 alkyl groups. Other suitable spacer monomers include vinyl esters, vinyl alcohol (made by hydrolysis of polyvinyl acetate), maleic anhydride, propylene glycol, and ethylene glycol.

The cationic amines can be primary, secondary, or tertiary amines, depending upon the particular species and the pH of the composition. In general, secondary and tertiary amines, especially tertiary amines, are preferred.

Amine-substituted vinyl monomers can be polymerized in the amine form, and then optionally can be converted to ammonium by a quaternization reaction. Amines can also be similarly quaternized subsequent to formation of the polymer. For example, tertiary amine functionalities can be quaternized by reaction with a salt of the formula R'X wherein R' is a short chain alkyl, preferably a C-| - C7 alkyl, more preferably a C-| - C3 alkyl, and X is an anion which forms a water soluble salt with the quaternized ammonium. Suitable cationic amino and quaternary ammonium monomers include, for example, vinyl compounds substituted with dialkylaminoalkyl acrylate, dialkylaminoalkyl methacrylate, monoalkylaminoalkyi acrylate, monoalkylaminoalkyi methacrylate, trialkyi methacryloxyalkyi ammonium salt, trialkyi acryloxyalkyi ammonium salt, diallyl quaternary ammonium salts, and vinyl quaternary ammonium monomers having cyclic cationic nitrogen-containing rings such as pyridinium, imidazolium, and quaternized pyrrolidone, e.g., alkyl vinyl imidazolium, alkyl vinyl pyridinium, alkyl vinyl pyrrolidone salts. The alkyl portions of these monomers are preferably lower alkyls such as the C-| - C3 alkyls, more preferably C1 and C₂ alkyls. Suitable amine-substituted vinyl monomers for use herein include dialkylaminoalkyl acrylate, dialkylaminoalkyl methacrylate, dialkylaminoalkyl acrylamide, and dialkylaminoalkyl methacrylamide, wherein the alkyl groups are preferably C-| - C7 hydrocarbyls, more preferably C-| - C3, alkyls.

The cationic polymers hereof can comprise mixtures of monomer units derived from amine- and/or quaternary ammonium-substituted monomer and/or compatible spacer monomers.

Suitable cationic hair conditioning polymers include, for example: copolymers of 1-vinyl-2-pyrrolidone and 1-vinyl-3-methylimidazolium salt (e.g., chloride salt) (referred to in the industry by the Cosmetic, Toiletry, and Fragrance Association, "CTFA", as Polyquaternium-16), such as those commercially available from BASF Wyandotte Corp. (Parsippany, NJ, USA) under the LUVIQUAT tradename (e.g., LUVIQUAT FC 370); copolymers of 1-vinyl-2-pyrrolidone and dimethylaminoethyl methacrylate (referred to in the industry by CTFA as Polyquaternium-11 ) such as those commercially available from Gaf Corporation (Wayne, NJ, USA) under the GAFQUAT tradename (e.g., GAFQUAT 755N); cationic diallyl quaternary ammonium- containing polymers, including, for example, dimethyldiallylammonium chloride homopolymer and copolymers of acrylamide and dimethyldiallylammonium chloride, referred to in the industry (CTFA) as Polyquaternium 6 and Polyquatemium 7, respectively; and mineral acid salts of amino-alkyl esters of homo- and co-polymers of unsaturated carboxyiic acids having from 3 to 5 carbon atoms, as described in U.S. Patent 4,009,256, incorporated herein by reference.

Other cationic polymers that can be used include polysaccharide polymers, such as cationic cellulose derivatives and cationic starch derivatives. Cationic polysaccharide polymer materials suitable for use herein include those of the formula:

A O - ( R _ M N+— R R 3^« X

R2

wherein: A is an anhydroglucose residual group, such as a starch or cellulose anhydroglucose residual, R is an alkylene oxyalkylene, polyoxyalkylene, or hydroxyalkylene group, or combination thereof, R¹ , R², and R³ independently are alkyl, aryl, alkylaryl, arylalkyi, alkoxyalkyl, or alkoxyaryl groups, each group containing up to about 18 carbon atoms, and the total number of carbon atoms for each cationic moiety (i.e., the sum of carbon atoms in Rl , R² and R³) preferably being about 20 or less, and X is an anionic counterion, as previously described.

Cationic cellulose is available from Amerchol Corp. (Edison, NJ, USA) in their Polymer JR® and LR® series of polymers, as salts of hydroxyethyl cellulose reacted with trimethyl ammonium substituted epoxide, referred to in the industry (CTFA) as Polyquatemium 10. Another type of cationic cellulose includes the polymeric quaternary ammonium salts of hydroxyethyl cellulose reacted with lauryl dimethyl ammonium-substituted epoxide, referred to in the industry (CTFA) as Polyquatemium 24. These materials are available from Amerchol Corp. (Edison, NJ, USA) under the tradename Polymer LM-200®.

Other cationic polymers that can be used include cationic guar gum derivatives, such as guar hydroxypropyltrimonium chloride (commercially available from Celanese Corp. in their Jaguar R series). Other materials include quaternary nitrogen-containing cellulose ethers (e.g., as described in U.S. Patent 3,962,418, incorporated herein by reference), and copolymers of etherified cellulose and starch (e.g., as described in U.S. Patent 3,958,581, incorporated herein by reference.) Silicones

Silicones useful herein are volatile soluble or insoluble, or nonvolatile soluble or insoluble. By "soluble" what is meant is that the silicones are miscible with water so as to form part of the same phase. By insoluble what is meant is that the silicones forms a separate, discontinuous phase from the carrier, such as in the form of an emulsion or a suspension of droplets of the silicones.

The nonvolatile dispersed silicones compounds useful herein will preferably have a viscosity of from about 1 ,000 to about 2,000,000 centistokes at 25°C, more preferably from about 10,000 to about 1,800,000, and even more preferably from about 100,000 to about 1,500,000. 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, which is incorporated by reference herein in its entirety. Suitable silicone fluids include polyalkyl siloxanes, polyaryl siloxanes, polyalkylaryl siloxanes, polyether siloxane copolymers, and mixtures thereof. Other nonvolatile silicones having hair conditioning properties can also be used.

The nonvolatile dispersed silicones herein also include polyalkyl or polyaryl siloxanes with the following structure (I)

A - si- o [ Si- O ] _x - Si- A ( I )

R

wherein R is alkyl or aryl, and x is an integer from about 7 to about 8,000. "A" represents groups which block the ends of the silicone chains. The alkyl or aryl groups substituted on the siloxane chain (R) or at the ends of the siloxane chains (A) can have any structure as long as the resulting silicone remains fluid at room temperature, is dispersible, is neither irritating, toxic nor otherwise harmful when applied to the hair, is compatible with the other components of the composition, is chemically stable under normal use and storage conditions, and is capable of being deposited on and conditions the hair. Suitable A groups include hydroxy, methyl, methoxy, ethoxy, propoxy, and aryloxy. The two R groups on the silicon atom may represent the same group or different groups. Preferably, the two R groups represent the same group. Suitable R groups include methyl, ethyl, propyl, phenyl, methylphenyl and phenylmethyl. The preferred silicones are polydimethylsiloxane, polydiethylsiloxane, and polymethylphenylsiloxane. Polydimethylsiloxane, which is also known as dimethicone, is especially preferred. The polyalkylsiloxanes that can be used include, for example, polydimethylsiloxanes. These silicones are available, for example, from the General Electric Company in their ViscasilR and SF 96 series, and from Dow Corning in their Dow Corning 200 series.

Polyalkylaryl siloxanes can also be used and include, for example, polymethylphenylsiloxanes. These siloxanes are available, for example, from the General Electric Company as SF 1075 METHYL PHENYL FLUID or from Dow Corning as 556 COSMETIC GRADE FLUID.

Especially preferred, for enhancing the shine characteristics of hair, are highly arylated silicones, such as highly phenylated polyethyl silicone having refractive index of about 1.46 or higher, especially about 1.52 or higher. When these high refractive index silicones are used, they should be mixed with a spreading agent, such as a surfactant or a silicone resin, as described below to decrease the surface tension and enhance the film forming ability of the material.

The nonvolatile dispersed silicones that can be used include, for example, a polypropylene oxide modified polydimethylsiloxane although ethylene oxide or mixtures of ethylene oxide and propylene oxide can also be used. The ethylene oxide and polypropylene oxide level should be sufficiently low so as not to interfere with the dispersibility characteristics of the silicone. These material are also known as dimethicone copolyols.

Other nonvolatile dispersed silicones include amino substituted materials. Suitable alkylamino substituted silicones include those represented by the following structure (II)

CH3 R

I I

HO - [Si- O ]_x - [Si - 0]y - H (H)

I I

CH₃ (CH₂)3

I NH

(CH₂)2

NH2 wherein R is CH3 or OH, x and y are integers which depend on the molecular weight, the average molecular weight being approximately between 5,000 and 10,000. This polymer is also known as "amodimethicone".

Suitable amino substituted silicones include those represented by the formula (III)

(R¹)aG3-a-^si-(-O^siG2)n-(-OSiG_b(Rl)₂._b)m-0-SiG₃._a(Rl)_a (III)

in which G is chosen from the group consisting of hydrogen, phenyl, OH, C-|-Cβ alkyl and preferably methyl; a denotes 0 or an integer from 1 to 3, and preferably equals 0; b denotes 0 or 1 and preferably equals 1 ; the sum n+m is a number from 1 to 2,000 and preferably from 50 to 150, n being able to denote a number from 0 to 1,999 and preferably from 49 to 149 and m being able to denote an integer from 1 to 2,000 and preferably from 1 to 10; Rl is a monovalent radical of formula CqH₂qL in which q is an integer from 2 to 8 and L is chosen from the groups

-N(R2)CH₂-CH₂-N(R2)₂

-N(R2)CH₂-CH₂-NR2H₂A^"

in which R² is chosen from the group consisting of hydrogen, phenyl, benzyl, a saturated hydrocarbon radical, preferably an alkyl radical containing from 1 to 20 carbon atoms, and A denotes a halide ion.

An especially preferred amino substituted silicones corresponding to formula (III) is the polymer known as "t methylsilylamodimethicone", of formula (IV): CH3 OH

I I

(CH₃ ) ₃Si- o - [si- o] _n- [ Si- 0] _m- Si (CH₃ ) ₃ ( IV) I I

CH₃ ( CH₂ ) 3

I

NH

I (CH₂ ) 2

I NH₂

In this formula n and m are selected depending on the exact molecular weight of the compound desired.

Other amino substituted silicones which can be used are represented by the formula (V):

R4CH2-CH0H-CH2-N⁺ ( R3 ) 3Q^"

R3

I (CH₃ ) ₃Si- O - [ Si- 0] _r- [Si- 0] _s- Si (CH3. 3 (V) I I

R3 _R3

where R3 denotes a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, preferably an alkyl or alkenyl radical such as methyl; R⁴ denotes a hydrocarbon radical, preferably a Ci - C-|8 alkylene radical or a Ci - C-J8. and more preferably C-| - Cs, alkyleneoxy radical; Q is a halide, preferably chloride; r denotes an average statistical value from 2 to 20, preferably from 2 to 8; s denotes an average statistical value from 20 to 200, and preferably from 20 to 50. A preferred polymer of this class is available from Union Carbide under the name "UCAR SILICONE ALE 56."

References disclosing suitable nonvolatile dispersed silicones include U.S. Patent No. 2,826,551 , to Geen; U.S. Patent No. 3,964,500, to Drakoff, issued June 22, 1976; U.S. Patent No. 4,364,837, to Pader; and British Patent No. 849,433, to Woolston, all of which are incorporated herein by reference in their entirety. Also incorporated herein by reference in its entirety is "Silicon Compounds" distributed by Petrarch Systems, Inc., 1984. This reference provides an extensive, though not exclusive, listing of suitable silicones.

Another nonvolatile dispersed silicones that can be especially useful is a silicone gum. The term "silicone gum", as used herein, means a polyorganosiloxane material having a viscosity at 25°C of greater than or equal to 1,000,000 centistokes. It is recognized that the silicone gums described herein can also have some overlap with the above-disclosed silicones. This overlap is not intended as a limitation on any of these materials. Silicone gums are described by Petrarch, and others including U.S. Patent No. 4,152,416, to Spitzer et al., issued May 1 , 1979 and Noll, Walter, Chemistry and Technology of Silicones, New York: Academic Press 1968. Also describing silicone gums are General Electric Silicone Rubber Product Data Sheets SE 30, SE 33, SE 54 and SE 76. All of these described references are incorporated herein by reference in their entirety. The "silicone gums" will typically have a mass molecular weight in excess of about 200,000, generally between about 200,000 and about 1,000,000. Specific examples include polydimethylsiloxane, polydimethylsiloxane methylvinylsiloxane) copolymer, polydimethylsiloxane diphenylsiloxane methylvinylsiloxane) copolymer and mixtures thereof.

Also useful are silicone resins, which are highly crosslinked polymeric siloxane systems. The crosslinking is introduced through the incorporation of tri-functional and tetra-functional silanes with mono- functional or di-functional, or both, silanes during manufacture of the silicone resin. As is well understood in the art, the degree of crosslinking that is required in order to result in a silicone resin will vary according to the specific silane units incorporated into the silicone resin. In general, silicone materials which have a sufficient level of trifunctional and tetrafunctional siloxane monomer units, and hence, a sufficient level of crosslinking, such that they dry down to a rigid, or hard, film are considered to be silicone resins. The ratio of oxygen atoms to silicon atoms is indicative of the level of crosslinking in a particular silicone material. Silicone materials which have at least about 1.1 oxygen atoms per silicon atom will generally be silicone resins herein. Preferably, the ratio of oxygen:silicon atoms is at least about 1.2:1.0. Silanes used in the manufacture of silicone resins include monomethyl, dimethyl, trimethyl, monophenyl, diphenyl, methylphenyl, monovinyl, and methylvinylchlorosilanes, and tetrachlorosilane, with the methyl substituted silanes being most commonly utilized. Preferred resins are offered by General Electric as GE SS4230 and SS4267. Commercially available silicone resins will generally be supplied in a dissolved form in a low viscosity volatile or nonvolatile silicone fluid. The silicone resins for use herein should be supplied and incorporated into the present compositions in such dissolved form, as will be readily apparent to those skilled in the art. Without being bound by theory, it is believed that the silicone resins can enhance deposition of other silicones on the hair and can enhance the glossiness of hair with high refractive index volumes.

Other useful silicone resins are silicone resin powders such as the material given the CTFA designation polymethylsilsequioxane, which is commercially available as Tospearl™ f_rom Toshiba Silicones.

Background material on silicones, including sections discussing silicone fluids, gums, and resins, as well as the manufacture of silicones, can be found in Encyclopedia of Polymer Science and Engineering, Volume 15, Second Edition, pp 204-308, John Wiley & Sons, Inc., 1989, which is incorporated herein by reference in its entirety.

Silicone materials and silicone resins in particular, can conveniently be identified according to a shorthand nomenclature system well known to those skilled in the art as the "MDTQ" nomenclature. Under this system, the silicone is described according to the presence of various siloxane monomer units which make up the silicone. Briefly, the symbol M denotes the mono-functional unit (CH3)3SiO) 5; D denotes the difunctional unit (CH3)₂SiO; T denotes the trifunctional unit (CH3)SiOι 5; and Q denotes the quadri- or tetra-functional unit SiO₂. Primes of the unit symbols, e.g., M', D', T, and Q' denote substituents other than methyl, and must be specifically defined for each occurrence. Typical alternate substituents include groups such as vinyl, phenyl, amino, hydroxyl, etc. The molar ratios of the various units, either in terms of subscripts to the symbols indicating the total number of each type of unit in the silicone, or an average thereof, or as specifically indicated ratios in combination with molecular weight, complete the description of the silicone material under the MDTQ system. Higher relative molar amounts of T, Q, T and/or Q' to D, D', M and/or or M' in a silicone resin is indicative of higher levels of crosslinking. As discussed before, however, the overall level of crosslinking can also be indicated by the oxygen to silicon ratio.

The silicone resins for use herein which are preferred are MQ, MT, MTQ, MQ and MDTQ resins. Thus, the preferred silicone substituent is methyl. Especially preferred are MQ resins wherein the M:Q ratio is from about 0.5:1.0 to about 1.5:1.0 and the average molecular weight of the resin is from about 1000 to about 10,000. Proteins

Proteins useful herein include proteins derived from a natural source, and protein derivatives. Nonlimiting examples of proteins include hydrolysed collagen, hydrolysed keratin, and proteins.

Commercially available proteins useful herein include: materials having tradenames CROTEIN series available from Croda, and PROMOIS series available from Seiwa Kasei. ADDITIONAL COMPONENTS

A wide variety of other additional components can be formulated into the present composition. These additional components are selected by the artisan according to the desired characteristics of the final product. Additional components include nonionic surfactants, amphoteric surfactants, zwitterionic surfactants; aqueous solvents such as C-|_5 alkyl monohydric alcohols and poiyvinyl alcohol; oily solvents such as volatile and nonvolatile silicone fluids of low molecular weight; thickening agents and suspending agents such as xanthan gum, guar gum, hydroxyethylcellulose, methylcellulose, starch and starch derivatives; viscosity modifiers such as methanolamides of long chain fatty acids such as cocomonoethanolamide; pearlescent aids such as ethylene glycol distearate; preservatives such as benzyl alcohol, methyl paraben, propyl paraben, imidazolidinyl urea, methylchloroisothiazoline, and methylisothiazoline; pH adjusting agents, such as sodium citrate, phosphoric acid, sodium hydroxide, and sodium carbonate; salts, in general, such as potassium acetate and sodium chloride; coloring agents, such as any of the FD&C or D&C dyes; hair oxidizing (bleaching) agents, such as hydrogen peroxide, perborate and persulfate salts; hair reducing agents such as the thioglycolates; perfumes; sequestering agents such as ethylenediamine tetraacetate and its salts thereof; polymer plasticizing agents, such as glycerin, disobutyl adipate, butyl stearate, and propylene glycol; ultraviolet and infrared screening and absorbing agents such as octyl salicylate, antidandruff agents such as zinc pyridinethione, and propellants such as fluorohydrocarbons, dimethyl ether, carbon dioxide, nitrogen, and LPG gas. Such optional additional components generally are used individually at levels from about 0.01% to about 10.0%, preferably from about 0.05% to about 5.0% by weight of the composition.

METHOD OF MAKING

The hair conditioning compositions of the present invention are preferably made by a method comprising three steps. The first step comprises mixing water, the amidoamine, and a portion of the acid at a temperature of at least 70°C. The second step comprises addition of the high melting point compound to the obtained mixture while maintaining the temperature. Agitation usually accompanies the second step. The third step comprises cooling the obtained mixture to a temperature below 60°C, wherein the remaining acid, if any, is added. Then, the other components are added.

It has been discovered that, by changing the amount of acid included in the first step, compositions of various characteristics can be made. When from about 80% to about 100%, preferably 100% of the acid is included in the first step, a conditioning composition which provides relatively more shear-thinning property is obtained. This rheology can be recognized by the consumer as good spreadability and good rinsability. When from about up to 80%, preferably from about 50% to about 75% of the acid is included in the first step and the remainder included in the third step, a conditioning composition which provides relatively less shear-thinning property is obtained. This rheology can be recognized by the consumer as richness, and creaminess.

The amount of acid to include in the first step, therefore, is determined in view of the components used in the composition according to the desired benefits of the final product.

The low melting point oily compound, if included, can be added either in the first step or after the third step. By changing at which step the low melting point oily compound is added, the optimum conditioning level expected from the low melting point oily compound can be adjusted. EXAMPLES

The following examples further describe and demonstrate embodiments within the scope of the present invention. The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, since many variations thereof are possible without departing from the spirit and scope of the invention. Ingredients are identified by chemical or CTFA name, or otherwise defined below.

The hair conditioning ingredients herein are expressed by weight percentage of the total compositions, unless otherwise specified. EXAMPLES l-IV

These examples show hair rinse compositions of the presen invention and the method of making thereof.

Component (Wt.%) Ex. I Ex. II Ex. Ill Ex. IV

Stearamidopropyldimethylamine* ¹ 2.00 1.50 1.50 1.50

Lactic Acid*^ 1.09 2.04 0.81

Acetic Acid*3 1.22

Cetyl Alcohol*⁸ 2.40 5.60 1.80 1.80

Stearyl Alcohol*⁹ 3.60 2.70 2.70

Oleyl Alcohol*¹⁰ 0.25

Mineral Oil*¹¹ 0.25

Silicones*¹^ 3.00 3.00 3.00 3.00

Benzyl Alcohol 0.40 0.40 0.40 0.40

EDTA 0.10 0.10 0.10 0.10

Kathon CG*¹³ 0.033 0.033 0.033 0.033

Perfume 0.20 0.20 0.20 0.20

Water q.s . to make 100

For Examples I through IV, water, stearamidopropyldimethylamine, about 50% of acid, and low melting point oily compound, if included, are mixed at a temperature above 70°C. Then the high melting point fatty compounds, EDTA and benzyl alcohol are added with agitation. After cooling down below 60°C, the remaining acid and other remaining components are added with agitation, then cooled down to about 30°C.

Examples I through IV have many advantages. For example, they can provide richness and creaminess to the wet hair, and also show good combing feel and lustery appearance when the hair is dry. EXAMPLES V - VIII

Examples V through VIII are hair rinse compositions having the same compositions as disclosed above for Examples I through IV, respectively, made with the following method.

Water, stearamidopropyldimethylamine, all of the acid, and low melting point oily compound, if included, are mixed at a temperature above 70°C. Then the high melting point fatty compounds, EDTA and benzyl alcohol are added with agitation. After cooling down below 60°C, the remaining components are added with agitation, then cooled down to about 30°C.

Examples V through VIII have many advantages. For example, they can provide good spreadability and good rinsability when the wet hair, and also show good combing feel and lustery appearance when the hair is dry. EXAMPLES IX - XII

These examples show hair rinse compositions of the present invention and the method of making thereof.

Component (Wt . % ) Ex . IX Ex .X Ex . XI

Ex . II

Stearamidopropyldimethylamine*¹ 1.50 1 .50 1.50 1.50

Malic acid*4 1 .37

Tartaric acid*5 0.61

Fumaric acid*6 0.47

Succinic acid*7 1.20 Cetyl Alcohol*⁸ 1.80 1.80 1.80 1.80

Stearyl Alcohol*⁹ 2.70 2.70 2.70 2.70

Si•l-ii•cones*1 ^±Δ 3.00 3.00 3.00 3.00

Benzyl . Alcohol 0.40 0.40 0.40 0.40

EDTA 0.10 0.10 0.10 0.10

Kathon CG* ³ 0.033 0.033 0.033 0.033

Perfume 0.20 0.20 0.20 0.20

Water rrr c_ 1 π r 1

For Examples IX through XII, water, the amidoamine and 50% of acid are mixed at a temperature above 70°C. Then the high melting point fatty compounds, EDTA and benzyl alcohol, if applicable, are added with agitation. After cooling down below 60°C, the remaining 50% of acid and remaining components are added with agitation, then cooled down to about 30°C.

Examples IX through XII have many advantages. For example, they can provide richness and creaminess to the wet hair, and also show good combing feel and lustery appearance when the hair is dry. EXAMPLES XIII - XVI

Examples XIII through XVI are hair rinse compositions having the same compositions as disclosed above for Examples IX through XII, respectively, made with the following method.

Water, the amidoamine and all of the acid are mixed at a temperature above 70°C. Then the high melting point fatty compounds and benzyl alcohol are added with agitation. After cooling down below 60°C, the remaining components are added with agitation, then cooled down to about 30°C.

Examples XIII through XVI have many advantages. For example, they can provide good spreadability and good rinsability when the wet hair, and also show good combing feel and lustery appearance when the hair is dry.

Definitions ^*1 Stearamidopropyldimethylamine: AMIDOAMINE MPS obtained by

Nikko ^*2 Lactic acid: LACTIC ACID obtained by Showa Kako *3 Acetic acid: ACETIC ACID obtained by Denki Kagaku Kogyo *4 Malic acid: MALIC ACID obtained by Fuso Kagaku

* 5, Tartaric acid: TARTARIC ACID obtained by Fuso Kagaku *6 Fumaric Acid: FUMARIC ACID obtained by Fuso Kagaku *7 Succinic Acid: SUCCINIC ACID obtained by Fuso Kagaku ^*8 Cetyl Alcohol: KONOL series obtained by New Japan Chemical ^*9 Stearyl Alcohol: KONOL series obtained by New Japan Chemical

*

¹⁰ Oleyl Alcohol: UNJECOL 90BHR obtained by New Japan Chemical

*

¹¹ Mineral Oil: BENOL obtained by Witco

*.

12 Silicones: 85%/15% (weight base) mixture of D5 Cyclomethicone and dimethicone gum (weight average molecular weight of about 400,000 to about 600,000) obtained by General Electric Co.

13 Kathon CG: Mixture of methylchloroisothiazoline and methylisothiazoline obtained by Rohm & Haas Co., (Philadelphia, PA, USA).

Claims

WHAT IS CLAIMED IS:

1. A hair conditioning composition comprising by weight:

(a) from about 0.6% to about 9.0% of an amidoamine having the following general formula:

R1 CONH (CH₂)_m N (R2)₂ wherein R¹ is a fatty acid residue having from about 11 to about 24 carbon atoms, R2 is an alkyl having from 1 to about 4 carbon atoms, and m is an integer from 1 to about 4;

(b) from about 0.1% to about 10.0% of an acid selected from the group consisting of acetic acid, tartaric acid, fumaric acid, lactic acid, malic acid, succinic acid, and mixtures thereof;

(c) from about 1% to about 15% of a high melting point compound having a melting point of at least about 25┬░C selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, hydrocarbons, steroids, and mixtures thereof; and

(d) water; wherein the pH of the hair conditioning composition is from about 2.5 to about 4.5, and wherein the composition is substantially free of quaternary ammonium compounds.

2. The hair conditioning composition according to Claim 1 wherein the acid is selected from the group consisting of acetic acid, tartaric acid, fumaric acid, and mixtures thereof.

3. The hair conditioning composition according to any of Claims 1 or 2 further comprising an oily compound having a melting point of not more than about 25┬░C selected from the group consisting of a first oily compound, a second oily compound, and mixtures thereof.

4. The hair conditioning composition according to any of Claims 1 or 2 further comprising an additional conditioning agent selected from the group consisting of cationic polymers, silicones, proteins, and mixtures thereof.

5. The hair conditioning composition according to any of Claims 1 or 2 wherein the high melting point compound is selected from the group consisting of pure cetyl alcohol, pure stearyl alcohol, and pure behenyl alcohol.

6. A method of making the hair conditioning composition according to any of Claims 1 or 2 comprising the steps of:

(a) mixing the amidoamine, not more than about 80% of the acid, and water at a temperature of above 70┬░C;

(b) adding the high melting point compound to the product of (a) at a temperature of above 70┬░C; and

(c) cooling the product of (b) to a temperature of below 60┬░C and adding the remainder of the acid.

7. A method of making the hair conditioning composition according to any of Claims 1 or 2 comprising the steps of:

(a) mixing the amidoamine, from about 80% to about 100% of the acid, and water at a temperature of above 70┬░C;

(b) adding the high melting point compound to the product of (a) at a temperature of above 70┬░C; and

(c) cooling the product of (b) to a temperature of below 60┬░C and adding the remainder of the acid.