Other

Genrikh A Tolstikov

Alexandr G Liakumovich

Boris S Korotkevich

Jury A Shmuk

Sagid R Rafikov

Valery P Juriev

Jury Ivanovich Michurov

Valerian Mikhailovich Sobolev

Grigory I Rutman

Boris Izrailevich Pantukh

Elena Yakovlevna Mandelshtam

Vasily P Popov

Sofia A Egoricheva

Elena Y Mandelshtamm

Jury I Murinov

Gennady V Leplyanin

Jury E Nikitin

Boris I Pantukh

Lilia K Bikchurina

Mengzda K Sultanova

Valery P Kazakov

Genrikh I Izmailov

Gennady K Markin

Edvard M Battalov

Vladimir S Kolosnitsyn

Usein M Dzhemilev

Lyalya N Golodkova

Jury B Monakov

Stanislav S Shavanov

A method of preparing trans-, trans-, trans-1,5,9-cyclododecatriene which comprises cyclotrimerization of butadiene at a temperature within the range of from 50.degree. to 150.degree. C. in the presence of a catalytic system consisting of a compound of bivalent nickel, an organo-aluminium compound of the formula (1) or (2):

Method of preparing trans-, trans-, trans-1,5,9-cyclododecatriene

The process for producing a colored polymer according to the present invention comprises polymerization of a vinyl monomer in the presence of a radical-type initiator and a coloring agent which is a sulphoxide, tributylphosphate, diisoamylphosphonate, trialkyl/aryl/phosphinoxide, di-2-ethylhexylphosphoric acid complex of a dyed metal chloride or nitrate. Said colored polymers find extensive use in various industries such as aircraft engineering, car manufacture, civil engineering, and the textile industry.

Process for producing colored polymer

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.

Process for preparing cis-polyisoprene

Growing community of inventors

Ufa, undefined

Genrikh A Tolstikov