Patent ID: 7015272
Filing Date: 2006-03-21
Classification: B60C,C08K,C08L

Abstract:
1. A process of preparing a rubber composition, based upon parts by weight per 100 parts by weight rubber (phr) comprises: (A) preparing a pre-formed composite by blending in an internal rubber mixer, to a temperature in a range of from about 150° C. to about 180° C. ingredients which comprises: wherein said mixing temperature is at least 10° C. higher than said melting point of said UHMWPE, wherein said mixing is conducted by mixing the ingredients at said temperature within said temperature range over a period of from about 2 to about 4 minutes and thereafter continuing to mix the ingredients within 10° C. of said temperature over a period of from about 2 to about 4 minutes, followed by (B) Cooling said pre-formed composite to a temperature below 40° C., wherein said cooled pre-formed composite is a temperature in a range of about 90° C. to about 115° C. mixed in an internal rubber mixer with vulcanizing ingredients comprised of sulfur and at least one sulfur vulcanization accelerator to a temperature in a range of from about 90° C. to about 115° C.