Polymeric dimethyl-dicyclopentadiene/limonene resin
AssigneeThe Goodyear Tire & Rubber Company
InventorsMark Leslie Kralevich, Jr., Edward John Blok, Lawson Gibson Wideman, Paul Harry Sandstrom
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Abstract
This invention relates to a novel class of polymeric resins which have a softening point ranging from about 50° C. to about 220° C. and a molecular weight ranging from about 500 to about 42,000. The resins comprise the polymers which result from the polymerization reaction between dimethyl dicyclopentadiene and limonene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.
Claims18
A resin composition comprising a polymer which is the reaction product of the polymerization reaction between dimethyl-dicyclopentadiene and limonene, said resin having a softening point ranging from about 50 to about 200° C., a molecular weight ranging from about 500 to about 42,000 and no less than 75 weight percent of the units in said resin are derived from dimethyl-dicyclopentadiene and limonene.
A resin composition comprising a blend of two or more resins, wherein each resin is the reaction product of the polymerization reaction between dimethyl-dicyclopentadiene and limonene and each resin has a softening point ranging from about 50 to about 220° C., a molecular weight ranging from about 500 to about 42,000 and no less than 75 weight percent of the units in said resin are derived from dimethyl-dicyclopentadiene and limonene.
A rubber stock comprising (1) a rubber selected from the group consisting of natural rubber, rubbers derived from a diene monomer or mixtures thereof, and (2) a polymeric resin composition which is the reaction product of the polymerization between dimethyl-dicyclopentadiene and limonene, said resin having a softening point ranging from about 50 to about 220° C., a molecular weight ranging from about 500 to about 42,000 and no less than 75 weight percent of the units in said resin are derived from dimethyl-dicyclopentadiene and limonene.
Dependencies are inferred from the claim text.