Patent ID: 8309615
Filing Date: 2012-11-13
Classification: C08K

Abstract:
1. An aqueous silica dispersion comprising a combination of: 1 to 30 weight %, based on a weight of said aqueous silica dispersion, of silica particles having a surface, said silica particles having an average diameter of 1 to 10 microns; 0.01 to 10 weight %, based on a weight of said silica particles, reacted aminosilane compound attached to said surface of said silica particles; 5 to 25 weight %, based on the weight of said silica particles, of an anionic polymeric dispersing agent, wherein the anionic polymeric dispersing agent is an addition polymer having acid groups or salts thereof, containing as polymerized units, at least one ethylenically unsaturated acid containing monomer and optionally at least one ethylenically unsaturated nonionic monomer, an aqueous medium; wherein said silica particles are dispersed in said aqueous medium, and wherein the aqueous silica dispersion comprises a viscosity no more than 2 Pa-s.