Patent ID: 9453124
Filing Date: 2016-09-27
CPC Classification: B82Y,C01P,C08F,C08K,C08L,C09C,C09D,Y10T

Claim Text:
1. A modified composite particles obtainable by a process comprising: A) mixing silicon dioxide in the form of waterglass or silica sols and one or more organic polymers in a solvent or a mixture of a plurality of solvents, with fixing of silicon dioxide onto organic polymers to form the composite particles, and where the organic polymers are selected from the group consisting of: based on the total weight of the ethylenically unsaturated monomers used in step A), where the % by weight add up to 100% by weight, wherein subsequently B) a monomer mixtures of one or more ethylenically unsaturated monomers selected from the group consisting of: based on the total weight of the ethylenically unsaturated monomers used in step B), where the % by weight add up to 100% by weight, and wherein the ethylenically unsaturated monomers are polymerized in a presence of the composite particles from step A), wherein the modified composite particles comprise a core-shell structure in which the composite particles from step A) form a core and polymeric chains formed in polymerization of the ethylenically unsaturated monomers in step B) form a shell.