Patent ID: 8506940
Filing Date: 2013-08-13
Classification: A61K,A61Q,C07C,C11D

Abstract:
1. A process comprising the steps of: a) dispersing under mechanical shear a molten dialkyl quaternary ammonium compound selected from the group consisting of N,N-di(stearoyl-oxy-ethyl)-N,N-dimethyl ammonium chloride; N-stearyl-N-(stearoyl-oxy-ethyl)-N,N-dimethyl ammonium chloride; N,N-di(stearoyl-oxy-ethyl)-N-methyl,-N-(2-hydroxyethyl) ammonium methylsulfate; 1,2-distearoyloxy-3-N,N,N-trimethylammoniumpropane chloride; N N-di (hardenedtallowovl-oxv-ethyl)-N,N-dimethyl ammonium chloride; N-hardenedtallowvl -N-(hardenedtallowovl-oxv-ethyl)-N,N-dimethyl ammonium chloride; N,N-di(hardenedtallowovl-oxv-ethyl)-N-methyl-N-(2-hydroxyethyl) ammonium methyl sulfate; 1,2,-hardenedtallowoyloxy-3-N,N,N-trimethylammoniumpropane chloride; and mixtures thereof in hot water having a temperature above a transition temperature of said dialkyl quaternary ammonium compound; b) adding a perfume raw material to said dialkyl quaternary ammonium compound to form a mixture; c) dispersing said mixture into water having a temperature above a transition temperature of said dialkyl quaternary ammonium compound; and d) cooling said mixture to form a composition comprising vesicles having a vesicle permeability index of less than about 1.3 and perfume raw material; wherein the mixture formed by step (b) is formed either by; (i.) adding the perfume raw material to said hot water prior to the addition of the molten quaternary ammonium compound; or by (ii.) adding the perfume raw material to said hot water together with or after the addition of the molten quaternary ammonium compound.