Elastomeric compositions comprising reclaimed vulcanized elastomer particles of broad size distribution and chemically modified vulcanized elastomer particles

摘要

Elastomer compositions comprising uncured elastomer and reclaimed elastomer are described. In one embodiment, the compositions comprise reclaimed elastomer material (micronized rubber powder) of broad particle size distribution, which is less expensive than traditional reclaimed elastomer material with narrow particle size distribution. Further, compositions comprising reclaimed elastomer materials with broad particle size distribution perform comparably to those comprising reclaimed elastomer materials with narrow particle size distribution. In other embodiments, the compositions comprise both vulcanized and devulcanized elastomer materials. Advantageously, by using a combination of vulcanized and devulcanized material, it is possible to incorporate a greater percentage by weight of reclaimed material in to an elastomer composition, thus providing additional cost savings while maintaining high levels of mechanical properties. Further, the use of the reclaimed material reduces landfill waste resulting in a more environmentally friendly product.

主权项

1. A micronized elastomer powder formulation for use in manufacturing a vulcanized elastomer product, comprising:
a plurality of cured elastomer particles, wherein the plurality of cured elastomer particles comprise at least 1% by weight particles of size greater than or equal to 50 mesh, and wherein the plurality of cured elastomer particles comprise at least 20% by weight particles of size less than or equal to 140 mesh.