J. Van Beugen Beheer B.v.

Borealis Ag

Winn & Coales International Limited

Edwin Welles

Leonard Van Beugen

Gerhard Maier

Martin Mayershofer

Norbert Jansen

The present invention provides a metal pipe coated on at least a section of the metal pipe with a polyolefin coating system, wherein the system consists of the following layers: (a) optionally, a corrosion protective layer of a chromate, phosphate or other salt; (b) a polyolefin based adhesive, preferably in a thickness of 0.3-5 mm; (c) a PE or PP coating layer, preferably in a thickness of 1-10 mm; (d) optionally, an adhesion promoting layer between the polyolefin based adhesive and a PE or PP layer; wherein the polyolefin based adhesive contains an organic phase consisting of substantially saturated hydrocarbons, and wherein the adhesive contains amorphous polypropylene, ethylene-propylene copolymers or poly(iso)butylene (co)polymers, said adhesive being flowable when a pressure of 10 kgf/cmis applied, wherein the PE or PP coating is a continuous layer over the coated section, and wherein said polyolefin based adhesive adheres to both the metal pipe and to said PE or PP coating.

Metal pipes with anticorrosive polyolefin covering layer

An adhesive compound consisting essentially of an organic phase and inorganic phase, the organic phase comprising an amorphous aliphatic (co)polymer having a Ring & Ball softening point of between 75 and 180&#xb0; C., and a second aliphatic material having a Tg of about &#x2212;5&#xb0; C. or lower and a kinematic viscosity of 4500 mm/s at 100&#xb0; C. or less, wherein said organic components are present in weight amounts of between 95/5 and 10/90; the inorganic phase comprising a filler, the filler being present in amount of at least about 15 wt % in the total composition. The compositions are suitable for anti-corrosion coatings or sealants against filtration or penetration of water or moisture. A rubber material may be added to this compound or other anti-corrosion coatings to increase the yield point at high temperatures.

Adhesive compound

The present invention relates to an adhesive compound consisting essentially of an organic phase and inorganic phase, the organic phase comprising an amorphous aliphatic (co)polymer having a Ring & Ball softening point of between 75 and 180&#xb0; C., and a second aliphatic material having a Tg of about &#x2212;5&#xb0; C. or lower and a kinematic viscosity of 4500 mm/s at 100&#xb0; C. or less, wherein said organic components are present in weight amounts of between 95/5 and 10/90; the inorganic phase comprising a filler, the filler being present in amount of at least about 15 wt % in the total composition. The compositions are suitable for anti-corrosion coatings or sealants against filtration or penetration of water or moisture. A rubber material may be added to this compound or other anti-corrosion coatings to increase the yield point at high temperatures.

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San Antonio, TX, United States of America

Edwin Welles