Polypropylene reinforced rubber

Details Polypropylene reinforced rubber Polypropylene reinforced rubber

C - Chemistry, Metallurgy

08

K

400/1134, 18/190

C08K 7/02 (2006.01) B29D 30/00 (2006.01) B60C 1/00 (2006.01) C08J 5/04 (2006.01) C08L 21/00 (2006.01) C08L 23/10 (2006.01)

Patent

CA 2022411

The present invention relates to a process for improving the modulus of a rubber without sacrificing other properties. By utilizing the process of this invention, rubber compositions having increased modulus are prepared by the formation of polypropylene fibrils randomly dispersed throughout the rubber matrix. The present invention includes (1) forming a blend of (a) a polymer alloy containing polypropylene and (b) an unvulcanized rubber stock wherein said polypropylene is present in said blend in an amount ranging fram about 5 phr to about 25 phr; and (2) vulcanizing the rubber stock in said blend after orienting said polypropylene by the application of heat and flowing said blend within a mold cavity.

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