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US 7,094,837 B1Granted
Translucent thermoplastic elastomers
AssigneeExxonMobil Chemical Patents Inc.
InventorsMaria D. Ellul, Donald R. Hazelton
Life of this patent
Estimating the term…
Abstract
Thermoplastic elastomers having the property of optical translucence are provided by incorporating syndiotactic polypropylene homopolymer into olefinic elastomers. The rubber component of the composition is at least partially cured.
Claims5
An optically translucent thermoplastic elastomer comprising
- (A) 10 to 90 weight percent, based upon the weight of the rubber and polypropylene, of propylene homopolymer principally containing propylene units of exactly alternating configuration and having a syndiotactic pentad fraction of at least 0.86, and
- (B) 90 to 10 weight percent, based upon the weight of the rubber and polypropylene, of an ethylene-propylene-nonconjugated diene terpolymer rubber and/or an ethylene-propylene copolymer rubber, said component (B) having an ethylene content of at least 74 wt % and having been completely crosslinked.
Dependencies are inferred from the claim text.