Process for producing high-impact polystyrene

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

C - Chemistry, Metallurgy

08

L

400/3059

C08L 25/04 (2006.01) C08F 8/06 (2006.01) C08F 291/02 (2006.01) C08L 51/04 (2006.01) C08L 53/02 (2006.01)

Patent

CA 1090036

PROCESS FOR PRODUCING HIGH-IMPACT POLYSTYRENE Abstract of the Disclosure A process for producing high-impact polystyrene which comprises polymerization of styrene in the presence of a reinforcing agent, i.e. a conjugated diolefine polymer, random copolymer, graft-copolymer or block-copolymer of a conjugated diolefine with styrene ox a mixture of said copolymers and an anionic catalyst based on organic deri- vatives of alkali metals or adducts thereof in a medium of inert hydrocarbon solvents such as aliphatic, cycloali- phatic and aromatic solvents or mixtures thereof: on comple- tion 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 reduce duration of the technological cycle due to increased polymerization rate, to facilitate production technology, and to manufacture polystyrene with improved properties.

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