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US 4,786,683 AGranted
Phenolic resin and polyether treated guayule resin
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 a reactive phenolic resin and a polyether such as an amine terminated polyether. The treated guayule resin has improved physical properties such as higher softening points. The resulting composition is suitable as a rubber additive since it improves various physical properties such as building tack, tear strength, hysteresis loss, and the like.
Claims10
A composition of matter, comprising:
- a guayule or a guayule like resin chemically treated with an effective amount of a phenolic crosslinking agent and an amine terminated polyether so that the softening point of said resin is at least 75.degree. C. according to ASTM Method E28-67, said phenolic crosslinking agent having the formula ##STR7## or combinations thereof, wherein X and Y independently is hydroxyl, bromine, iodine, or chlorine, wherein R is hydroxymethyl, bromomethyl, iodomethyl, chloromethyl, an alkyl having from 1 to 25 carbon atoms, or an alkenyl having from 3 to 25 carbon atoms, and wherein R.sup.1, R.sup.2, and R.sup.3, independently is hydroxymethyl, bromomethyl, iodomethyl, chloromethyl, an alkyl having from 1 to 25 carbon atoms, or an alkenyl having from 3 to 25 carbon atoms, and wherein n is from 0 to 2.
Dependencies are inferred from the claim text.