Patent ID: 6288137
Filing Date: 2001-09-11
Classification: A61K,A61Q,C08J

Abstract:
A process for preparing a gel from an aqueous suspension of liquid or solid particles at a selected temperature, comprising:(a) selecting at least one surfactant at a concentration of about 0.1 to 10% by weight, such that said surfactant at said concentration form bilayers in an aqueous composition at said selected temperature;(b) forming an aqueous suspension of liquid or solid particles with said surfactant;(c) adding to said suspension an effective amount of a water-soluble associative polymer, said associative polymer having a mass average molar mass of about 10.sup.4 to about 10.sup.7, and comprising a hydrophilic polymer having intermittent side chains comprising hydrophobic groups containing at least 8 carbon atoms, said amount of associative polymer being effective to cause said suspension to increase in viscosity and form a gel at said selected temperature; and(d) forming a gel at said selected temperature from said suspension, thereby stabilizing said suspension.