Thermoplastic elastomers having improved cure

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/08 (2006.01) C08J 3/20 (2006.01) C08K 5/14 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2220668

Ethylene, alpha-olefin, vinyl norbornene thermoplastic elastomers containing elastomeric polymers provide superior cure levels to thermoplastic elastomers containing ethylene, alpha-olefin, diene monomer elastomeric polymers with other dienes than vinyl norbornene. The elastomeric polymers, along with a thermoplastic, curative, and other components will have cure levels in excess of 95 percent. Lower diene incorporation into the polymer combined with lower curative levels yield a fabricated article with improved resistance to compression set and improved heat aging.

Cette invention concerne des élastomères thermoplastiques à base d'éthylène, d'alpha-oléfines et de norbornène de vinyle, et contenant des polymères élastomères, lesquels ont des niveaux de solidification plus élevés que les élastomères thermoplastiques contenant de l'éthylène, des alpha-oléfines et des polymères élastomères à monomères de diène comportant des diènes autres que du norbornène de vinyle. Ces polymères élastomères, ainsi qu'un thermoplastique, un solidifiant et d'autres composants, possèdent des niveaux de solidification supérieurs à 95 %. L'incorporation de diène inférieur dans le polymère, en combinaison avec de faibles quantités de solidifiant, permet d'obtenir un article fabriqué qui possède une résistance accrue à la rémanence en compression et au vieillissement thermique.

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