Functional silane‐modified calcium carbonate

摘要

AbstractIn the course of graft polymerization of styrene on a calcium carbonate powder surface treated with a silance coupling agent such as γ‐methacryloxypropyltrimethoxysilane, gelation of the reaction mixture was observed just as on silane‐modified clay. Infrared spectroscopic and gel‐permeation chromatographic studies have revealed that the extracts of styrene monomer from the powder surfaces contained polymeric silane coupling agent, having crosslinking ability, besides monomeric silane coupling agent. The catalytic effect on the condensation of the silane coupling agent on the powder surface was found to be increased in following order: CaCO3