| 摘要 |
PURPOSE:To produce the titled resin having excellent processability, by dissolving an oil-soluble polymerization initiator in vinyl chloride monomer (or its mixture), and contacting the solution with a thermoplastic polyurethane elastomer soluble in said monomer (mixture) in the pressure of an aqueous medium and a suspending agent, thereby polymerizing the monomer. CONSTITUTION:An oil-soluble polymerization initiator (e.g. azobisisobutylvaleronitrile) is dissolved in vinyl chloride monomer or a mixture of vinyl chloride monomer with other monomer (e.g. ethylene) copolymerizable with said monomer and giving a homopolymer having a glass transition point of <=30 deg.C. The monomer (mixture) is polymerized by contacting the solution with a thermoplastic polyurethane elastomer soluble in said monomer (mixture) [preferably an elastomer having a softening point of 30-60 deg.C and a solution viscosity of 100-400cps as 20wt% methyl ethyl ketone solution, and its amount is 20-150pts.wt. per 100pts.wt. of the monomer (mixture)]. |
