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Nikolai Fedorovich Kovalev

Izrail M Belgorodsky

Anatoly I Lukashov

Anatoly Sergeevich Lykin

Basia Moiseevna Bolkhovets

Arkady Samuilovich Estrin

Semen Moiseevich Kavun

Vladimir Alexandrovich Krol

Vladislav Petrovich Smirnov

Larisa Mikhailovna Davydova

Valentin Vasilievich Sazykin

Olga Izrailevna Belgorodskaya

Jury Alexandrovich Lvov

Efim Moiseevich Sire

Izmail Vladimirovich Garmonov

Lev Moiseevich Kogan

Lidia Mikhailovna Pospelova

Elena Nikolaevna Kropacheva

Natalya Borisovna Monastyrskaya

Anatoly Vasilievich Gagin

Ljubov Petrovna Bataeva

Modified and stabilized synthetic cis-1,4 polyisoprene is a product of chemical interaction between synthetic cis-1,4 polyisoprene containing no less than 95 percent of cis-1,4 units and 0.05 to 1 mass percent of 4-nitrosodiphenylamine. The proposed method of making this product comprises polymerization of isoprene in hydrocarbon solvent in the presence of Ziegler-Natta catalyst, the addition to the polymerization mass of 0.05 to 1 mass percent of, and degassing and drying of the rubber thus produced. The product possesses improved properties, including good stability in the course of storage and machining. Unvulcanized rubber mixed on the basis of this product are marked by a high adhesion strength, whereas the vulcanizates have splendid elastic hysteresis and fatigue characteristics. The quality of the novel product is in no way inferior to that of natural rubber.

Modified and stabilized synthetic cis-1,4 polyisoprene and method for

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Saint-Petersburg, Russia

Nikolai Fedorovich Kovalev