High impact polystyrene composition

Details High impact polystyrene composition High impact polystyrene composition

1976-10-20

1979-05-15

DeBenedictis, Thomas

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260877, 260879, 260880R, 260880B, 260886, 260892, 260894, C08L 5302

Patent

active

041547764

ABSTRACT:
A composition obtained by mixing polystyrene with a master-batch composition containing a mixture of a vinyl aromatic polymer, a rubbery dienic polymer and a sequenced copolymer of styrene and diene, the total styrene polymer content of this master-batch composition including both the free polystyrene and the polystyrene present in the sequenced copolymer, being between 50 and 80% by weight of the composition, the total rubber content of this master-batch composition, including both the rubbery dienic polymer and the dienic polymer present in the sequenced copolymer being between 20 and 50% by weight of the composition, the sequenced copolymer content being such that it introduces from 3 to 90% by weight of the total rubber in the composition, the total percent rubber content of said master-batch composition being at least 1.5 times the total percent rubber content of the final composition.

REFERENCES:
patent: 3281383 (1966-10-01), Zelinski et al.
patent: 3906057 (1975-09-01), Durst
patent: 3907930 (1975-09-01), O'Grady
patent: 3907931 (1975-09-01), Durst
patent: 3936365 (1976-02-01), Saunders et al.
patent: 3985702 (1976-10-01), Himes

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