Styrene base random copolymer and process for producing the same

Details Styrene base random copolymer and process for producing the same Styrene base random copolymer and process for producing the same

1996-11-12

1998-12-29

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526347, 528481, 528501, C08F21236, C08F21208

Patent

active

058543660

ABSTRACT:
A styrene base random copolymer having a weight average molecular weight of 200,000 to 1,000,000, a monovinylbenzene unit and a divinylbenzene unit in an amount of 50 to 500 ppm by weight based on the weight of the monovinylbenzene unit, the divinylbenzene unit consisting of p-divinylbenzene unit and m-divinylbenzene unit, wherein the weight ratio between the p-divinylbenzene unit and the m-divinylbenzene unit is in the range of 100:0 to 75:25, which is superior in impact strength, melt tension, heat resistance and fluidity, and which is capable of being molded within a short molding cycle, is industrially advantageously produced by a continuous bulk polymerization without troubles such as undesirable deposits of polymeric gel material on reactor walls.

REFERENCES:
patent: 4336361 (1982-06-01), Tsuruta et al.
patent: 5059667 (1991-10-01), Nakamura
patent: 5318852 (1994-06-01), Nishimori et al.
patent: 5459210 (1995-10-01), Kihara et al.

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