MANUFACTURING METHOD OF RUBBER-MODIFIED STYRENIC RESIN

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method which gives a rubber-modified styrenic resin having high impact resistance. SOLUTION: In manufacturing a rubber-modified styrenic resin by subjecting a solution comprising 75-98 wt.% of (A) starting material monomers comprising a styrenic monomer or a mixture of a styrenic monomer and a vinyl monomer copolymerizable therewith and (B) 25-2 wt.% of a rubbery polymer, a solution containing a part of the component (A) together with the component (B) is subjected to polymerization until rubber phase inversion occurs and subsequently the rest of the component (A) is added in a lump or in lots to the polymerization reaction system and further the polymerization reaction is continued.