The Goodyear & Tire Rubber Company

William M Saltman

Morford C Throckmorton

Ken W Donbar

Melvin Auerbach

There is disclosed 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 or aromatic solvent system employing as a catalyst system a mixture of (1) an organonickel compound, (2) an organoaluminum compound, and (3) a fluorine containing compound selected from the group consisting of hydrogen fluoride and hydrogen fluoride complexes which are prepared by complexing hydrogen fluoride with a ketone, an aldehyde, a nitrile, a mineral acid containing oxygen, an ester, an ether, an alcohol, a phenol or water; said polymerization being conducted in the presence of small amounts of olefins selected from the group consisting of 1-butene, isobutylene, cis and trans-2-butene and allene.

Controlling the molecular weight of polybutadiene

A process for producing cis-1,4 polybutadiene by contacting butadiene with a catalyst consisting of (1) at least one organoaluminum compound, (2) at least one nickel compound selected from the class consisting of nickel salts of carboxylic acids, organic complex compounds of nickel, nickel tetracarbonyl, and (3) at least one hydrogen fluoride complex prepared by complexing hydrogen fluoride with a member of the class consisting of ketones, esters, ethers, alcohols, nitriles and water.

Catalyst composition comprising an organoaluminum compound/an

Catalyst composition for the preparation of butadiene

An oxidation resistant polymeric composition comprising the reaction product of some carbon-to-carbon double bond unsaturated polymers and a 1,3-dipolar compound corresponding to the general formula ##SPC1## Wherein R is selected from various alkyl radicals, aromatic radicals, cycloalkyl radicals, phenyl radicals and substituted phenyl radicals.

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Akron, OH, United States of America

William M Saltman