Patent ID: 7691398
Filing Date: 2010-04-06
Classification: A61K,A61Q

Abstract:
1. A process for the preparation of a hair treatment composition comprising an aqueous dispersion of composite particles, wherein the particles comprise: i) an anionic smectic clay with a net negative surface charge, and ii) a charged organic molecule having a positive charge that is the cation of an alkyl trimethyl ammonium chloride containing a straight chain or branched alkyl group that comprises from 12 to 22 carbon atoms, wherein the charged organic molecule is not capable of imparting a colour to hair, the process comprising the steps of: (a) mixing an aqueous dispersion of the charged organic molecule with the clay to form an aqueous dispersion of composite particles, wherein said aqueous dispersion of composite particles is substantially free from non-ionic surfactant, and (b) combining the aqueous dispersion of composite particles with suitable hair treatment ingredients in a compatible aqueous carrier, wherein the hair treatment composition is in the form of a post-wash rinse-off conditioner that further comprises (I) emulsified droplets of a silicone conditioning agent and (II) at least 50% by weight, based on the weight of the total composition, of water; and wherein the weight ratio of the charged organic molecule to the clay is from 0.1:1 to 10:1; and wherein the composite particles have a volume-based median particle diameter (D 0.5 ) of from greater than 2 to less than 50 microns; and wherein the anionic smectic clay has a cation exchange capacity of from 30 meq/100 g to 100 meq/100 g.