Thermoplastic elastomer composition

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 23/22 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2508927

A novel thermoplastic elastomer composition which comprises an isobutylene block copolymer (A) comprising a polymer block consisting mainly of isobutylene units and a polymer block consisting mainly of aromatic vinyl compound units and an isobutylene polymer (B) having an alkenyl group at an end. It is rich in flexibility and is excellent in moldability, rubbery properties, mechanical strength, compression set characteristics, and vibration-damping properties.

L'invention concerne une nouvelle composition élastomère thermoplastique comprenant un copolymère séquencé d'isobutylène (A) comprenant un polymère séquencé constitué principalement d'unités d'isobutylène et un polymère séquencé constitué principalement d'unités d'un composé de vinyle aromatique et un polymère d'isobutylène (B) ayant un groupe alcényle sur son extrémité. La composition est riche en flexibilité et présente une excellente aptitude au moulage, des propriétés caoutchouc, une très bonne résistance mécanique, des caractéristiques prédéfinies de compression et d'excellentes propriétés d'amortissement aux vibrations.

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