The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1979
Filed:
Jun. 15, 1977
Vladimir S Glukhovskoi, Moscow, SU;
Fedor P Afanasov, Moscow, SU;
Valentin P Shatalov, Moscow, SU;
Alexandr G Kharitonov, Moscow, SU;
Ervin M Rivin, Moscow, SU;
Jury S Tsybin, Moscow, SU;
Klavdia A Kulakova, Moscow, SU;
Boris A Dolgoplosk, Moscow, SU;
Valerian M Sobolev, Moscow, SU;
Valery P Kotov, Voronezh, SU;
Vasily V Polyakov, Voronezh, SU;
Anatoly P Garshin, Voronezh, SU;
Vyacheslav G Fil, Voronezh, SU;
Stanislav V Efremov, Voronezh, SU;
Ivan P Mitin, Voronezh, SU;
Vasily F Kozlov, Voronezh, SU;
Anna R Gantmakher, Moscow, SU;
Dmitry K Polyakov, Moscow, SU;
Alexandr A Arest-Yakubovich, Moscow, SU;
Raisa V Basova, Moscow, SU;
Other;
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.