Patent ID: 6881416
Filing Date: 2005-04-19
Classification: A61K,A61Q,C08G,C08L,Y10S

Abstract:
1. A process for the preparation of a gel composition, said process comprising reacting: a) an unsaturated organopolysiloxane resin; b) an Si—H functional organopolysiloxane crosslinker, containing minimally 5 Si—H groups; c) an unsaturated hydrocarbon component containing minimally 6 carbon atoms, and optionally containing interspersed heteroatoms or heteroatom groups in a ratio of carbon atoms in the backbone of the unsaturated hydrocarbon moiety to heteroatoms of at least 4:1, or said hydrocarbon moiety containing minimally 8 carbon atoms and terminated by a carboxylic acid amide or carboxylic acid ester group; and d) optionally, an unsaturated hydrophile component, the mol ratio of unsaturated hydrophile component to unsaturated hydrocarbon component not exceeding 90:10, in the presence of a hydrosilylation catalyst; wherein reacting of said unsaturated organopolysiloxane resin and said Si—H functional crosslinker takes place in minimally 20 weight percent of liquid oleaginous component, and wherein the ratio of total mol of unsaturated groups present to mol of Si—H bound hydrogen is from 0.11 to 2.5.