Patent ID: 7838667
Filing Date: 2010-11-23
Classification: A61K,A61Q,C08F

Abstract:
1. A method for grafting an unsaturated monomer onto a guar comprising the steps of: (1) forming a mixture comprised of an unsaturated monomer having a functional group selected from quaternary ammonium and a water-soluble or water-dispersible guar; (2) drying the mixture and (3) irradiating the mixture with an amount of electron beam radiation sufficient to form an unsaturated monomer-water-soluble or water-dispersible guar graft copolymer, wherein the graft copolymer is depolymerized to a molecular weight lower than the molecular weight of the ungrafted guar, and the guar in the copolymer has a molecular weight of between 100,000 and 700,000 Daltons.