Method and catalyst for the production of high trans-polyalkadie

Details Method and catalyst for the production of high trans-polyalkadie Method and catalyst for the production of high trans-polyalkadie

1975-01-23

1977-07-12

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 526134, 526144, 526335, C08F 466, C08F 3608

Patent

active

040355705

ABSTRACT:
Polyalkadienes with high percentage of trans configurations are produced by employing a catalyst system obtained by admixing (A) at least one hydride having the general formula MZR.sub.a H.sub.(4-a) wherein M is lithium, sodium, potassium, rubidium or cesium, Z is aluminum or boron, R is hydrogen or a monovalent, saturated, cyclic or acyclic hydrocarbon radical containing up to 12 carbon atoms, and a is an integer between 0 and 2, (B) at least one titanium tetrahalide compound having the general formula TiX.sub.4 wherein X is chloride or bromide, (C) an iodine composition having the general formula R'I wherein R' is a monovalent, saturated, cyclic or acyclic hydrocarbon radical containing up to 12 carbon atoms, and (D) an ether having the general formula R"--O--R'" wherein R" and R"' can be the same or different monovalent, saturated, cyclic or acyclic hydrocarbon radicals containing 2 to 12 carbon atoms with a total of not more than about 16 carbon atoms per ether molecule.

REFERENCES:
patent: 2977349 (1961-03-01), Brockway et al.
patent: 3050513 (1962-08-01), Zelinski et al.
patent: 3066129 (1962-11-01), Farrar
patent: 3242156 (1966-03-01), Marconi
patent: 3382225 (1968-05-01), Naylor
patent: 3403141 (1968-09-01), Zelinski et al.
patent: 3449312 (1969-06-01), Minchak

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