Patent ID: 9187647
Filing Date: 2015-11-17
Classification: B82Y,C01B,C01P,C08K,C09C,C09D

Abstract:
1. A method of producing an aqueous dispersion of silanized colloidal silica particles comprising mixing in an aqueous medium a) at least one silane compound containing an epoxy-functionality, b) at least one silane compound having no epoxy-functionality capable of modifying colloidal silica particles and comprising at least one of an amido-functionality or an ureido-functionality, and c) colloidal silica particles having an average particle diameter ranging from about 3 to about 50 nm in any order to form an aqueous dispersion of silanized colloidal silica particles containing silane compounds originating from a) and b), wherein the weight ratio of a) and b) to silica is from about 0.01 to about 0.5 and the silica content in the dispersion is from about 20 to about 80 wt %.