Polyester reinforced rubber
AssigneeThe Goodyear Tire & Rubber Company
InventorsJames B. Pyle, Richard G. Bauer, Donald J. Burlett
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Abstract
It is often desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for modifying rubbers to improve their modulus without sacrificing other properties. By utilizing the process of this invention, rubber compositions having increased modulus are prepared by grafting polyester onto rubber. This can be accomplished by reacting a polydiene rubber with a thioacid or maleic anhydride and subsequently with the polyester. It is also possible to prepare such polyester modified rubber compositions by reacting an epoxidized rubber with the polyester.
Claims7
A process for preparing a rubber composition having a high modulus which comprises reacting at least one dithio diacid having the structural formula HOOC--A-S-S-A--COOH, wherein A represents an alkylene group containing from 1 to about 10 carbon atoms with at least one polydiene rubber and at least one polyester elastomer having a melting point of less than about 240.degree. C.
Dependencies are inferred from the claim text.