Process for preparing poly(p-methylstyrene)

Details Process for preparing poly(p-methylstyrene) Process for preparing poly(p-methylstyrene)

C - Chemistry, Metallurgy

08

F

402/571

C08F 112/12 (2006.01) C08F 12/12 (2006.01)

Patent

CA 1193797

A PROCESS FOR PREPARING POLY(P-METHYLSTYRENE) ABSTRACT Poly(methylstyrene) suitable for injection molding has a molecular weight distribution of at least 4.0, a melt index of at least 5 and comprises the polymerization product of methylstyrene isomers in the following proportions: p-methylstyrene at least 90 weight percent; m-methylstyrene 0 to 10 weight percent; o-methylstyrene less than 0.1 weight percent. The product is prepared by mixing substantially all of the methylstyrene isomer mixture to be polymerized with polymerization initiators including a high temperature initiator and a low temperature initiator and reacting the mixture at a temperature sufficient to effect the required polymerization.

417434

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