Copolymerization of conjugated diolefins using a chromium-contai

Details Copolymerization of conjugated diolefins using a chromium-contai Copolymerization of conjugated diolefins using a chromium-contai

1978-04-05

1979-09-18

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526137, C08F 478, C08F23604, C08F23606, C08F23608

Patent

active

041683749

ABSTRACT:
There is disclosed a method for copolymerizing cis-1,3-pentadiene and trans-1,3-pentadiene to prepare cis-1,4-polypentadienes. Other conjugated diolefins, including butadiene, isoprene, 2-ethyl-1,3-butadiene and 2-methyl-1,3-pentadiene also may be copolymerized with the cis-1,3-pentadiene isomer to prepare elastomeric copolymers. The polymerization catalyst is a ternary catalyst system comprising (A) a soluble chromium compound, (B) organometallic compounds such as a trihydrocarbylaluminum, and (C) a dihydrocarbyl hydrogen phosphite.

REFERENCES:
patent: 3040016 (1962-06-01), Balas et al.

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