Process for producing-impact polystyrene

Details Process for producing-impact polystyrene Process for producing-impact polystyrene

1977-06-15

1979-05-08

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08F27902

Patent

active

041536479

ABSTRACT:
A process for producing high-impact polystyrene which comprises polymerization of styrene in the presence of a reinforcing agent, i.e. a conjugated diolefin polymer, random copolymer, graft-copolymer or block-copolymer of a conjugated diolefin with styrene or a mixture of said copolymers and an anionic catalyst based on organic derivatives of alkali metals or adducts thereof in a medium of inert hydrocarbon solvents such as aliphatic, cycloaliphatic and aromatic solvents or mixtures thereof. On completion of polymerization the resulting polymer is subjected to cross-linking by means of peroxide compounds or redox systems, followed by isolation of the desired product.
The process for producing high-impact polystyrene according to the present invention makes it possible to shorten the technological cycle due to increased polymerization rate, to facilitate production technology, and to manufacture polystyrene with improved properties.

REFERENCES:
patent: 2772254 (1956-11-01), Gleason
patent: 2880190 (1959-03-01), Gleason
patent: 3445543 (1969-05-01), Gruver
patent: 3661866 (1972-05-01), Schwarz
patent: 3790547 (1974-02-01), Muller
patent: 3806557 (1974-04-01), Halasa
patent: 3819764 (1974-06-01), Halasa

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