Elastomeric Compositions and Their Use in Articles

摘要

A dynamically vulcanized alloy contains at least one isobutylene-containing elastomer, at least one thermoplastic resin, and an anhydride functionalized oligomer grafted to the thermoplastic resin. In the alloy, the elastomer is present as a dispersed phase of small vulcanized or partially vulcanized particles in a continuous phase of the thermoplastic resin and the alloy is substantially absent of any sulfonamides.

主权项

1. A dynamically vulcanized alloy comprising:
a) at least one elastomer derived from 1) at least one C4 to C7 isoolefin monomer and 2) at least one multiolefin or other polymerizable monomer; b) at least one polyamide having a relative viscosity in the range of 2.9 to 3.9 per ASTM D2857; c) at least one polyamide having a relative viscosity below 2.9 per ASTM D2857; and d) a viscosity modifier of 2 to 30 phr of an anhydride functionalized oligomer grafted to at least one of the polyamides,wherein the alloy has less than 100 ppm by weight of sulfonamides and the elastomer is present as a dispersed phase of small vulcanized or partially vulcanized particles in a continuous phase of polyamide.