Coated pipe comprising polyolefin layer with enhanced adhesion

A structure according to any of the preceding claims wherein the surface of layer or profile (A) has been treated with said composition comprising an organosilicon compound before (A) and (B) are brought adjacent to each other.

A structure according to any of the preceding claims wherein the organosilicon compound comprises one or more hydrolysable groups which after hydrolyses yield silanol groups.

A structure according to any of the preceding claims wherein the organosilicon compound comprises the structural element:

• wherein R1, R2, and R3, independently are selected from alkyl groups and acetyl groups.

A structure according to any of the preceding claims wherein the treatment of the surface of layer or profile (A) and/or layer or profile (B) comprises applying a solution of the organosilicon compound to the surface.

A structure according to any of the preceding claims wherein the polyolefin of the composition layer or profile (B) is composed of comprises adhesion promoting groups.

A structure according to any of the preceding claims wherein the polyolefin of the base resin of the composition layer or profile (B) is composed of is an ethylene homo- or copolymer or a propylene homo- or copolymer.

Process for the production of a structure characterized in that the surface of a layer or profile (A) composed of a first material and/or the surface of a polyolefin layer or profile (B) composed of a composition comprising a polyolefin is/are treated with a composition comprising an organosilicon compound before (A) and (B) are brought adjacent to each other.

Use of a composition comprising an organosilicon compound as an adhesion promoter in a structure comprising a layer/profile (B) composed of a composition comprising a polyolefin.