Core-shell polymer and unsaturated polyester resin composition containing the same as a water-reducing agent

摘要

The present invention relates to an unsaturated polyester resin composition for making a cured molded article, comprising: i) an unsaturated polyester resin; And (ii) a core-shell polymer as a water-reducing core, the polymer comprising: (a) a crosslinked core layer polymerized with a first monomer comprising at least 50 weight percent aromatic vinyl monomer, wherein the core-A core layer containing 90% by weight; And (b) a shell layer polymerized with a monomer comprising at least 50% by weight methyl methacrylate, wherein the core-shell polymer has a difference in refractive index within the range of 0,02 from the refractive index of the cured material in the unsaturated polyester resin Which has a refractive index in the range of 1.52-1.58.