MANUFACTURE OF AROMATIC VINYL RESIN

PURPOSE:To obtain a colorless transparent aromatic vinyl resin of high heat resistance, by carrying out a radical copolymerization by incorporating each specific amount of alkyl alcohol and a bifunctional organic peroxide in maleic anhydride and an aromatic vinyl compound. CONSTITUTION:The objective (styrene) copolymer can be obtained by incorporating (A) a mixture consisting of (i) 1-15wt% of maleic anhydride and (ii) 85- 99wt% of an aromatic vinyl compound (e.g. styrene) with (B) a solvent consisting of (i) 0.1-20pts.wt. by a 1-6C alkyl alcohol (e.g. methyl alcohol) and (ii) 100pts.wt. of the above two compounds and (C) as an initiator, 0.005-0.07pts.wt. of a bifunctional organic peroxide[having a decomposition temperature 85- 110 deg.C for obtaining a half life of 10hr, e.g. 1,1-bis(t-butyl-peroxy)-3,3,5-trimethylcyclohexane]to carry out a radical copolymerization for an average of 2-6hr. USE:Internal trim parts for automobiles, domestic electrical equipment, heat-resistant food containers, etc.