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:
Dec. 05, 1978
Filed:
Jan. 19, 1977
Alexandr G Liakumovich, Kazan, SU;
Boris I Pantukh, Bashkirskaya ASSR, Sterlitamak, SU;
Mengzda K Sultanova, Bashkirskaya ASSR, Sterlitamak, SU;
Vasily P Popov, Bashkirskaya ASSR, Sterlitamak, SU;
Genrikh A Tolstikov, Bashkirskaya ASSR, Ufa, SU;
Jury B Monakov, Bashkirskaya ASSR, Ufa, SU;
Valery P Juriev, Bashkirskaya ASSR, Ufa, SU;
Elena Y Mandelshtam, Moscow, SU;
Boris S Korotkevich, Moscow, SU;
Jury A Shmuk, Moscow, SU;
Other;
Abstract
A process for preparing cis-polyisoprene which comprises polymerization of isoprene in a medium of a non-polar hydrocarbon solvent at a temperature ranging from 0.degree. to 60.degree. C in the presence of a catalyst comprising a reaction product of titanium tetrachloride and an intracyclic organo-aluminium compound having the formula: ##STR1## wherein R, the same or different, are H, CH.sub.3 ; taken in a molar ratio of 1:1.05-1.1 respectively; weight ratio of isoprene to said catalyst being equal to 100:0.2-0.7. The present invention makes it possible to improve the quality of the thus-obtained cis-polyisoprene and to increase the catalyst capacity by two times due to modification of its properties.