Back to results
US 4,902,775 AGranted
Rubber vulcanization agents of sulfur olefin adduct
AssigneeThe Goodyear Tire & Rubber Company
InventorsHoward A. Colvin, Charles L. Bull, Jr., Fredrick L. Magnus
Life of this patent
Estimating the term…
Abstract
Superior vulcanization agents for rubber are prepared by reacting sulfur with at least one olefin at 120.degree.-200.degree. C. in an aqueous reaction media with agitation. In one embodiment, the vulcanization agent comprises a sulfur/olefin adduct having from about 39% to about 46% by weight of free elemental sulfur level.
Claims11
A composition of matter comprising a sulfur/olefin adduct containing from about 39% to about 46% by weight of free elemental sulfur and prepared according to a process which includes the steps of
- (a) heating to a temperature of from 120.degree. C. to about 200.degree. C., with agitation, an aqueous suspension containing (1) a mixture of elemental sulfur and at least one olefin, or (2) a reaction product of sulfur melt and at least one olefin, wherein the aqueous suspension is heated for a time sufficient to form a granular sulfur/olefin adduct;
- and
- (b) isolating the granular sulfur/olefin adduct.
Dependencies are inferred from the claim text.