Rubber composition comprised of cis-1,4-polyisoprene and polymeric di-maleamic acid and articles, including tires, having at least one component comprised thereof
AssigneeThe Goodyear Tire & Rubber Company
InventorsLawson Gibson Wideman, Paul Harry Sandstrom
Life of this patent
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Abstract
This invention relates to rubber compositions comprised of cis-1,4-polyisoprene and a polymeric di-maleamic acid and to articles of manufacture having at least one component comprised thereof, including tires. The polymeric di-maleamic acid has been observed to enhance green strength of such rubber composition.
Claims19
A rubber composition comprised of cis-1,4-polyisoprene elastomer which contains from about 0.1 to about 20 phr of a polymeric di-maleamic acid and where said cis-1,4-polyisoprene is selected from natural, cis 1,4-polyisoprene rubber, synthetic cis-1,4-polyisoprene rubber or their mixtures;
- wherein said polymeric di-maleamic acid is characterized as a polyoxypropylene polymer with maleamic acid termination on each end of the polymer and having a molecular weight in a range of about 210 to 10,200.
Dependencies are inferred from the claim text.