| 摘要 |
PURPOSE:To obtain a granular copolymer having excellent heat resistance and impact resistance, by subjecting an aromatic vinyl and an N-substituted maleimide to graft emulsion polymerization onto conjugated diene rubber to give latex, blending the latex with latex containing no rubber and heating the blend together with a coagulant. CONSTITUTION:(A) 100pts.wt. latex obtained by subjecting 30-75pts.wt. monomer mixture consisting of 30-80wt.% aromatic vinyl monomer, 5-65wt.% N-substituted maleimide monomer and 0-40wt.% comonomer to graft emulsion polymerization onto 25-70pts.wt. conjugated diene rubber is blended with (B) 0-40pts.wt. latex obtained by subjecting 30-80wt.% aromatic vinyl monomer, 5-65wt.% N-substituted maleimide monomer and 0-40wt.% comonomer, coagulated in the presence of a coagulant, the coagulation system is maintained at 100-190 deg.C and then the powdery copolymer is recovered to give the aimed copolymer. |
