THERMOPLASTIC RESIN COMPOSITION AND ITS PREPARATION PROCESS

摘要

The thermoplastic resin composition is prepd by the steps of : preparing the latex having 0.05-0.20 micrometer particle size by polymerising the monomer mixt. comprising 100-70 wt.pts of 1,3 butadien or isoprene 0-30 wt.pts of monovinylidene aromatic cpd. or unsatd. nitril or their mixt., and ion exchanging water, 1-3 wt.pts of emulsifier, initiator, Mw controlling agent and crosslinking agent, with 70-96% of polymerization deg.; preparing the rubber latex having 0.3-0.7 micrometer particle size by polymerising 0.1-3.0 wt.pts of obtd. alpha, beta- carboxylic acid and 0.4-3.0 wt.pts of 2nd emulsifier; then emulsion-graft copolymerising 7-70 wt.pts of the obtd. rubber latex and 30-93 wt.pts of one or more of unsatd. nitrile monomer or methacryl monomer. The alpha, beta- carboxylic acid is the mixt. comprising one or more of acrylic acid, methacrylic acid, itaconic acid or crotonic acid. The obtd. resin compsn. has good impact resistance and molding workability.