ORGANOPOLYSILOXANE-URETHANE-VINYL GRAFT COPOLYMERS

摘要

A graft copolymer comprising (I) as a first polymeric moiety an organopolysiloxane with OH functional groups, (II) as a second polymeric moiety a polyesterurethane and, (III) units of vinyl monomers, units of the first and second polymeric moieties being linked via vinyl polymer bridges, all these units having been polymerized in the presence of mixtures of the fir-t and second polymeric moieties, is produced by polymerizing a suitable monomer dispersion The product is suited for replacing all or some of the organopolysiloxane component in room temperature curable compositions containing organopolysiloxanes, silane cross-linking agents and a curing catalyst