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US 4,616,068 AGranted
Polyamine treated guayule resin and rubber compositions containing the same
AssigneeThe Firestone Tire & Rubber Company
InventorsWilliam W. Schloman, Jr., James A. Davis
Life of this patent
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Abstract
Guayule-type resins are chemically treated with polyamine. The resulting composition is suitable as a rubber additive since it improves various physical properties of rubber compositions such as green strength, building tack, tear strength, hysteresis loss and the like.
Claims18
A composition of matter, comprising:
- guayule resin chemically crosslinked by treating with a polyamine or a sulfur-containing polyamine, said polyamine having the formula ##STR2## wherein A or B, independently, is hydrogen or hydrocarbon having from 1 to 30 carbon atoms, wherein said hydrocarbylene has from 2 to 20 carbon atoms, and wherein n is an integer from 1 to 10, and said sulfur-containing polyamine having the formula
- H.sub.2 N--Z--S--Z--NH.sub.2,
- H.sub.2 N--Z--SO--Z--NH.sub.2,
- H.sub.2 N--Z--SO.sub.2 --Z--NH.sub.2,
- and
- H.sub.2 N--Z--SS--Z--NH.sub.2
- wherein said Z is a hydrocarbylene having from 2 to 20 carbon atoms.
4 more elements
Dependencies are inferred from the claim text.