Process for providing an extended tubular article with a corrosion protection coating system having self-repairing properties

Abstract

The present invention provides a system, composition and process for protecting an extended tubular article or a section thereof from corrosion. The system comprises a layer of an adhesive composition on a surface of the extended tubular article or section thereof, and a corrosion protecting layer thereon.

1 - 21 . (canceled) 
   
   
       22 . A process for providing an article or section thereof with a corrosion protecting system, the process comprising:
 (a) applying a layer of an adhesive composition to a surface of the article or section thereof, and, subsequently,   (b) applying a corrosion protecting layer to the layer of the adhesive composition, wherein the adhesive composition comprises a polyolefin blend comprising 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, said polyisobutene having:
 (i) a glass transition temperature of lower than −40° C.; and 
 (ii) a number average molecular weight M n  of 1,300 to 1,000,000. 
   
   
   
       23 . The process according to  claim 22 , wherein the polyisobutene has a surface tension of less than 40 mN/m at 20° C. 
   
   
       24 . The process according to  claim 22 , wherein the olefin polymer has a glass transition temperature of less than −20° C. 
   
   
       25 . The process according to  claim 24 , wherein the olefin polymer is selected from the group consisting of:
 (a) a polymer comprising 50.0% to 99.9% by weight of isobutene and 0.1% to 50.0% of an optionally substituted, linear or branched C 2 -C 12  alkene or an optionally substituted, linear or branched C 2 -C 12  alkadiene, based on the total weight of the polymer;   (b) a polymer comprising 50.0% to 99.9% by weight of propene and 0.1% to 50.0% of a an optionally substituted, linear or branched C 2 -C 12  alkene, based on the total weight of the polymer;   (c) a polymer comprising 0.1% to 50.0% by weight of ethene and 50.0% to 99.9% of an optionally substituted, linear or branched C 2 -C 12  alkene, based on the total weight of the polymer; and   (d) a polymer comprising 0.1% to 50.0% by weight of 2-methyl-1-pentene and 50.0% to 99.9% of an optionally substituted, linear or branched C 2 -C 12  alkene, based on the total weight of the polymer, and mixtures thereof.   
   
   
       26 . The process according to  claim 24 , wherein the olefin polymer is not crosslinked. 
   
   
       27 . The process according to  claim 22 , wherein the article is a tubular article 
   
   
       28 . The process according to  claim 27 , wherein the tubular article is a pipe or a pipe line. 
   
   
       29 . The process according to  claim 22 , wherein the article comprises steel, concrete, or both. 
   
   
       30 . The process according to  claim 22 , wherein the article is pre-coated. 
   
   
       31 . The process according to  claim 30 , wherein the pre-coat comprises an expoxy resin. 
   
   
       32 . The process according to  claim 28 , wherein the pipe or pipe line is pre-coated. 
   
   
       33 . The process according to  claim 32 , wherein the pre-coat comprises an expoxy resin. 
   
   
       34 . The process according to  claim 22 , wherein the article is provided with a base layer. 
   
   
       35 . The process according to  claim 34 , wherein the base layer comprises a homopolymer or a copolymer of an optionally substituted, linear or branched C 2 -C 12  alkene. 
   
   
       36 . The process according to  claim 28 , wherein the pipe or pipe line is provided with a base layer. 
   
   
       37 . The process according to  claim 35 , wherein the base layer comprises a homopolymer or a copolymer of an optionally substituted, linear or branched C 2 -C 12  alkene. 
   
   
       38 . The process according to  claim 22 , wherein the corrosion protecting layer comprises a homopolymer or a copolymer of an optionally substituted, linear or branched C 2 -C 12  alkene. 
   
   
       39 . The process according to  claim 22 , wherein the corrosion protecting layer is heat shrinkable. 
   
   
       40 . The process according to  claim 39 , wherein the corrosion protecting layer comprises a shrink sleeve. 
   
   
       41 . The process according to  claim 22 , wherein the corrosion protecting layer comprises a polyisobutene having a glass transition temperature of less than −20° C. and a surface tension of less than 40 mN/m at 20° C. and a filler material. 
   
   
       42 . The process according to  claim 22 , wherein the corrosion protecting layer comprises a tape. 
   
   
       43 . The process according to  claim 25 , wherein the optionally substituted, linear or branched C 2 -C 12  alkene and the optionally substituted, linear or branched C 2 -C 12  alkadiene are substituted with one or more halogen atoms. 
   
   
       44 . The process according to  claim 25 , wherein the optionally substituted, linear or branched C 2 -C 12  alkene is selected from the group consisting of ethene, 1-propene, 2-methyl-1-propene, 1-butene, 2-butene, 1-pentene, 2-methyl-1-pentene, 1-hexene and 1-octene. 
   
   
       45 . The process according to  claim 25 , wherein the optionally substituted, linear or branched C 2 -C 12  alkadiene is selected from the group consisting of butadiene, isoprene, halogenated butadiene, halogenated isoprene, styrene and halogenated styrene.