| abstract |
PURPOSE: A styrene resin having improved flow properties, mechanical strength and electric insulation, by mixing a styrene polymer with a styrene-vinyl acetate block copolymer. n CONSTITUTION: A composition comprising 0.01W40wt% of a styrene-vinyl acetate block copolymer consisting of 90W10wt% of styrene-based structural units and 10W90wt% of vinyl acetate-based structural units and 99.99W60wt% of a styrene polymer. The styrene-vinyl acetate block copolymer which is used is prepared by block-copolymerizing a styrene monomer with a peroxy linkage-containing vinyl acetate polymer prepared by polymerizing a vinyl acetate monomer with a polymer having a peroxy linkage in the molecule. The styrene resin composition contains preferably 0.001W36wt% of the vinyl acetate-based structural units. If the content exceeds 36%, the flow properties are improved but unfavorably the mechanical strength is lowered. n COPYRIGHT: (C)1981,JPO&Japio |