Heat-recoverable composition and article

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 123/16 (2006.01) C09J 123/08 (2006.01) C09J 123/22 (2006.01) C09J 151/06 (2006.01) C08L 23/16 (2006.01) C08L 23/22 (2006.01)

Patent

CA 2482706

Disclosed is an adhesive composition suitable for bonding to a polymeric material and steel. The composition comprises specified proportions of a maleic anhydride-modified propylene-ethylene copolymer resin, a maleic anhydride-modified polyethylene, a polyisobutylene, a terpolymer comprising ethylene, propylene and a non-conjugated diene, and a hydrocarbon resin tackifier. The composition is useful in preparing a heat-recoverable article that is used to provide a protective coating on the joints of a steel pipeline. Also provided is a single sleeve or two-sleeve system for application to the joints of a coated steel pipeline operating at temperatures up to 120~C

L'invention concerne une composition adhésive appropriée pour la liaison avec un matériau polymère et l'acier. La composition comprend des proportions spécifiées d'une résine copolymère anhydride maléique-propylène-éthylène modifié, d'un anhydride maléique-polyéthylène modifié, d'un polyisobutylène, d'un terpolymère comprenant de l'éthylène, du propylène et un diène non conjugué, et une résine hydrocarbonée donnant du collant. La composition est utilisée pour préparer un article thermorétractable qui est utilisé pour fournir un revêtement protecteur sur les joints d'une canalisation en acier. L'invention concerne également un système à manchon unique ou à double manchon pour l'application sur des joints d'une canalisation d'acier revêtue, soumise à des températures pouvant atteindre 120 ·C.

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