Modified and stabilized synthetic cis-1,4 polyisoprene and metho

Details Modified and stabilized synthetic cis-1,4 polyisoprene and metho Modified and stabilized synthetic cis-1,4 polyisoprene and metho

1976-09-29

1978-09-19

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 52, 526 522, C08F 832

Patent

active

041156366

ABSTRACT:
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.

REFERENCES:
patent: 2895937 (1959-07-01), Baldwin et al.
patent: 3073797 (1963-01-01), Fischer et al.
patent: 3081279 (1963-03-01), Hammel et al.
patent: 3086000 (1963-04-01), Wargotz
patent: 3322738 (1967-05-01), Uraneck et al.
patent: 3367904 (1968-02-01), Mullins et al.

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