Damping thermoplastic elastomer articles with low compression set
AssigneePolyOne Corporation
InventorJiren Gu
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Abstract
An article is formed from a thermoplastic elastomer compound that includes styrenic block copolymer and high softening point tackifier. The styrenic block copolymer has a Copolymer Tan Delta Peak Temperature and the thermoplastic elastomer compound has a Compound Tan Delta Peak Temperature. The Compound Tan Delta Peak Temperature is greater than the Copolymer Tan Delta Peak Temperature. The article exhibits useful damping properties at or above room temperature while also exhibiting low compression set, which makes the article especially suitable for use as a seal or a gasket.
Claims15
An article formed from a thermoplastic elastomer compound, the compound comprising:
- (a) styrenic block copolymer having a Copolymer Tan Delta Peak Temperature;
- and
- (b) tackifier having a softening point of at least about 80° C. according to ASTM 6493;
- wherein the compound has a Compound Tan Delta Peak Temperature, and the Compound Tan Delta Peak Temperature is greater than the Copolymer Tan Delta Peak Temperature;
- and
- wherein the article has a compression set of less than about 50% at 70° C. for 22 hours according to ASTM D395.
Dependencies are inferred from the claim text.