CROSSLINKED VINYL POLYMER PARTICULATE AND ITS PRODUCTION

摘要

PURPOSE:To provide crosslinked polymer particulates of a high elastic modulus by a very simple procedure. CONSTITUTION:Crosslinked vinyl polymer particulates having a compression modulus of 550 to 800kg/mm<2> when deformed by 10% in diameter are obtained by polymerizing 100 pts.wt. vinyl monomer mixture which contains a crosslinkable vinyl monomer comprising mainly m-divinylbenzene and a vinyl monomer containing a nitrile group in a weight ratio of 40/60 to 90/10 in an aqueous medium in the presence of 3-10 pts.wt. organic peroxide radical polymerization initiator.