Patent ID: 9090795
Filing Date: 2015-07-28
Classification: C08J,C08K,C08L,C09D,C09J,C14C

Abstract:
1. A process for producing composite particles, wherein α) one or more silicon compounds of the general formula R is an optionally substituted alkyl or aryl radical having 1 to 20 carbon atoms or a hydrogen atom, R n is from 1 to 4, or β) one or more condensation products of the silicon compounds of the formula (1) are condensed in a solvent or a mixture of two or more solvents at a pH of 8 to 12 in the presence of one or more soluble polymers, the soluble polymers used being polymers of vinyl esters with 6 to 15% by weight of ethylenically unsaturated carboxylic acids and optionally 0.3 to 2% by weight of ethylenically unsaturated silanes; polymers of vinyl esters with 0.3 to 2% by weight of ethylenically unsaturated silanes; polymers of (meth)acrylic esters with 6 to 15% by weight of ethylenically unsaturated carboxylic acids and optionally 0.3 to 2% by weight of ethylenically unsaturated silanes; or polymers of (meth)acrylic esters with 0.3 to 2% by weight of ethylenically unsaturated silanes; where the figures in % by weight are based on the total weight of monomers used to prepare the soluble polymers, and condensation products formed from the silicon compounds α, or condensation products β or condensation products thereof, are fixed on one or more soluble polymers, wherein no multiply-charged metal ions are introduced into the composite particles.