Molecular weight control of polybutadiene

Details Molecular weight control of polybutadiene Molecular weight control of polybutadiene

1990-01-08

1991-01-08

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526137, 5263404, 526903, C08F 240, C08F 3606

Patent

active

049836951

ABSTRACT:
A process for the regulation of the molecular weight of a high cis 1,4-polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic solvent system employing as a catalyst system a mixture of (1) an organonickel compound, (2) an organoaluminim compound and (3) a fluorine containing compound selected from the group consisting of hydrogen fluoride and hydrogen fluoride complexes prepared by complexing hydrogen fluoride with ketones, esters, ethers, alcohols, phenols and water, said polymerization being conducted in the presence of small amounts of alpha olefins such as ethylene and propylene.

REFERENCES:
patent: 3066128 (1962-11-01), Youngman
patent: 3068217 (1962-12-01), Higgins et al.
patent: 3856764 (1974-12-01), Throckmorton et al.
patent: 3910869 (1975-10-01), Throckmorton
patent: 3962375 (1976-06-01), Throckmorton et al.
Ryozo Sakata et al., "Effect of Unsaturated Hydrocarbons on the Polymerization of Butadiene with Nickel Catalyst", Die Makromolekulare Chemie 139 (1970), pp. 73-81.

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