Process for providing an extended tubular article with a...

B - Operations – Transporting – 32 – B

Patent

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B32B 1/08 (2006.01) F16L 58/10 (2006.01)

Patent

CA 2669277

The present invention A process for providing an extended tubular article or one or more sections of the extended tubular article with a corrosion protecting system, wherein (a) a layer of an adhesive composition is applied to the surface of the extended tubular article or the one or more sections of the extended tubular article, and (b) a corrosion protecting layer is applied to the layer of the adhesive composition, the adhesive composition comprising a polyolefin blend, wherein the polyolefin blend comprises 30 % to 100 % by weight of a polyisobutene and 0 % to 70 % by weight of an olefin polymer, based on the total weight of the polyolefin blend, wherein said polyisobutene is has a glass transition temperature of lower than -400C and a number average molecular weight Mn of 1300 to 1.000.000.

La présente invention concerne un procédé permettant de doter un article tubulaire allongé, ou au moins une section dudit article tubulaire allongé, d'un système anti-corrosion, dans lequel (a) une couche d'une composition adhésive est appliquée à la surface de l'article tubulaire allongé ou de l'au moins une section de l'article tubulaire allongé, et (b) une couche anti-corrosion est appliquée sur la couche de composition adhésive, la composition adhésive comprenant un mélange polyoléfinique comportant de 30 à 100 % en poids d'un polyisobutène et de 0 à 70 % en poids d'un polymère oléfinique, sur la base du poids total du mélange polyoléfinique, ledit polyisobutène présentant une température de transition vitreuse inférieure à -400 °C et une masse moléculaire moyenne en nombre (Mn) de 1 300 à 1 000 000.

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