Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-06-07
1978-07-04
Henderson, Christopher A.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
526 79, 526 81, C08F27902
Patent
active
040988473
ABSTRACT:
A process for the preparation of high gloss, high impact vinyl aromatic hydrocarbons which process comprises (1) subjecting a solution of rubber and vinyl aromatic hydrocarbon monomer to mass polymerization conditions in the presence of a chain transfer agent for a period of 4 to 10 hours until the reaction mass reaches a viscosity of 1800 to 2000 cps., said chain transfer agent being introduced into the reaction mass in two portions, a first portion representing 50 to 90% of the total chain transfer agent to be present during the mass polymerization and being added to said solution at or before the beginning of said mass polymerization and a second portion representing 10 to 50% being added just prior to the end of said mass polymerization, (2) subjecting said reaction mass to suspension polymerization conditions and (3) recovering high impact polymeric vinyl aromatic hydrocarbons having improved high gloss characteristics.
REFERENCES:
patent: 3047534 (1962-07-01), Dyer
patent: 3428712 (1969-02-01), Carrock
patent: 3660534 (1972-05-01), Carrock
patent: 3781383 (1973-12-01), Finestone
Fuller Robert A.
Stevenson John L.
Cosden Technology, Inc.
Henderson Christopher A.
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