Hair treatment composition

A hair treatment composition having cleansing and conditioning properties comprising, in an aqueous medium:

• (i) an amidoamine corresponding to the general formula (I):
• 3
• in which R1is a hydrocarbyl chain having 10 or more carbon atoms,
• R2 and R3 are independently selected from hydrocarbyl chains of from 1 to 10 carbon atoms, and
• m is an integer from 1 to about 10;
• (ii) an acid;
• (iii) a cationic surfactant selected from the group of cationic surfactants corresponding to the general formula (ii) and the general formula (iii);
• general formula (ii) being:
• [N(R1) (R2) (R3) (R4)]+ (X)−
• in which R1 is a hydrocarbyl chain having from 8 to 20, preferably from 8 to 18, more preferably from 8 to 14 carbon atoms, and R2, R3 and R4 are independently selected from (a) hydrocarbyl chains of from 1 to about 30 carbon atoms, or (b) functionalised hydrocarbyl chains having from 1 to about 30 carbon atoms and containing one or more aromatic, ether, ester, amido or amino moieties present as substituents or as linkages in the radical chain, X is a salt-forming anion such as those selected from halogen, (e.g. chloride, bromide), acetate, citrate, lactate, glycolate, phosphate nitrate, sulphate, and alkylsulphate radicals, and at least one of the R1 to R4 radicals contains one or more hydrophilic moieties selected from alkoxy (preferably C1-C3 alkoxy), polyoxyalkylene (preferably C1-C3 polyoxyalkylene), alkylamido, hydroxyalkyl, alkylester, and combinations thereof,
• and, general formula (III) being:
• [N(R1)(R2) (R3) (R4)]+ (X)−
• in which
• R1 is a linear or branched, preferably linear, saturated or unsaturated hydrocarbyl chain having from 5 to 30 carbon atoms, which is linked either directly to the quaternary nitrogen atom or via a functionalised link moiety such as an alkylester, alkylamido or an alkoxy, or combinations thereof;
• R2 is a linear or branched, preferably linear, saturated or unsaturated hydrocarbyl chain having from 1 to 30 carbon atoms, and is optionally substituted with one or more hydroxy groups;
• R3 is a linear or branched, preferably linear, saturated or unsaturated hydrocarbyl chain having from 1 to 30 carbon atoms, and optionally contains one or more groups selected from hydroxy, alkoxy and polyoxyalkylene groups, and combinations thereof, suitably present as either substituents on the hydrocarbyl chain or as linkages in the hydrocarbyl chain;
• R4 is a linear or branched saturated or unsaturated hydrocarbyl chain having from 1 to 30 carbon atoms, and which contains one or more groups selected from hydroxy, aromatic, ether, ester, amido and amino groups, and combinations thereof, suitably present as either substituents on the hydrocarbyl chain or as linkages in the hydrocarbyl chain;
• and,
• X is a salt-forming anion such as those selected from halogen, (e.g. chloride, bromide), acetate, citrate, lactate, glycolate, phosphate nitrate, sulphate, and alkylsulphate radicals;
• and
• (iv) a fatty alcohol material.