METHOD FOR PRODUCING LONG PIPES WITH SELF-REPAIRING ANTICORROSION COATING Russian patent published in 2012 - IPC F16L58/10 C09J123/22 

FIELD: pipe production.

SUBSTANCE: one or several sections of the long pipe are fitted with a protective anticorrosion system, where (a) a layer of adhesive composition is applied to the whole pipe, one or several sections, and (b) the anticorrosion protective layer is applied to the adhesive layer. The adhesive composition includes a polyolefin mixture which comprises isobutene polymer (30-100% of polyolefin mixture mass) and olefin polymer (0-70% of polyolefin mixture mass), where the said isobutene polymer is characterized by the vitrification temperature below -40° C and number-average molecular weight M_n ranging from 1300 to 1000000.

EFFECT: improved adhesive properties.

1 dwg