Robert L Shell

US Patent:

41973836, Apr 8, 1980

Filed:

Jun 19, 1975

Appl. No.:

5/588256

Inventors:

Robert L. Shell - Akron OH

Assignee:

The Goodyear Tire & Rubber Company - Akron OH

International Classification:

C08L 7102
C08L 900
C08L 2316
C08L 1900

US Classification:

525405

Abstract:

A method of providing a cured low unsaturated elastomer polymer of improved crack growth resistance under high flex conditions. Specifically, oxypropylene rubbers are compounded with small amounts of hexamethylene tetramine and polyhydroxyl aromatic compounds having less than 500 molecular weight.

US Patent:

39857077, Oct 12, 1976

Filed:

Jun 23, 1975

Appl. No.:

5/589171

Inventors:

Robert L. Shell - Akron OH

Assignee:

The Goodyear Tire & Rubber Company - Akron OH

International Classification:

C08K 539
C08G 2306

US Classification:

260 4575N

Abstract:

A composition comprising a rubbery copolymer of propylene oxide in admixture with a heat age resisting mixture of a nickel dialkyl dithiocarbamate and an imidazole where the ratio of the carbamate units to imidazole units is in the range of from about 16:1 to about 1:40. The composition has particular utility for providing a rubbery copolymer of propylene oxide having improved resistance to heat aging in a temperature range of about 100. degree. C. to about 170. degree. C.