The Goodyear & Tire Rubber Company

Charles J Suchma

Morford C Throckmorton

This invention discloses a process for the nonaqueous dispersion polymerization of butadiene monomer in a reaction mixture containing a liquid nonaqueous dispersion medium, a catalyst system, butadiene monomer, and at least one polymeric dispersing agent, the improvement which comprises carrying out the polymerization of the butadiene monomer in the presence of the reaction product of (1) an alkylbenzene sulfonic acid wherein said alkyl moiety contains from 6 to 20 carbon atoms and (2) a polyalkylene amine that contains from 6 to 20 carbon atoms and 2 to 8 amine moieties. The presence of a small amount of this reaction product very substantially reduces the amount of polymeric dispersing agent needed in such a polymerization.

Process for nonaqueous dispersion polymerization of butadiene

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.

Copolymerization of conjugated diolefins using a chromium-containing

There is disclosed a method for the preparation of very high cis-1,4-polypentadiene which comprises polymerizing cis-1,3-pentadiene, also known as cis-piperylene, with a ternary catalyst system comprising (A) a soluble chromium compound such as chromium salts of organic acids, organic complex compounds of chromium containing tridentate organic ligands, and .pi.-bonded organochromium compounds, (B) an organometallic, such as trialkylaluminums, dialkylmagnesiums or dialkylzincs, and (C) dialkyl hydrogen phosphites.

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North Royalton, OH, United States of America

Charles J Suchma