High impact poly(para-methylstyrene)polymers

Details High impact poly(para-methylstyrene)polymers High impact poly(para-methylstyrene)polymers

C - Chemistry, Metallurgy

08

F

400/3029

C08F 12/12 (2006.01) C08L 25/16 (2006.01)

Patent

CA 1232992

ABSTRACT OF THE DISCLOSURE Improved High Impact Poly(Para-Methylstyrene) Polymers Disclosed herein is a method of improving the environmental stress crack resistance of high impact poly(p-methylstyrene), comprising (a) melting said high impact poly(p-methylstyrene) at a temperature between 150° and 250°C; and (b) blending an additive copolymer with said melted high impact poly(p-methylstyrene) capable of imparting a higher environmental stress crack resist- ance to the final blend of said high impact poly(p- methylstyrene) and said additive copolymer, said additive copolymer being selected from the group consisting of linear low density polyethylene, poly- propylene, polycarbonate, ethylene methylacrylate acrylic acid terpolymer, polyethylene terephthalate glycol, polystyrene-polybutadiene diblock, and butadiene-paramethylstyrene diblock; said blending occurring at a temperature between 150° and 250°C. The blend of high impact poly(p-methylstyrene) with the additive polymer so prepared can be molded into a shaped container which is resistant to fats.

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