Patent ID: 7807013

Claim:
A method for adhering a silicon modified polyolefin internal tube liner to a thermoset epoxy matrix surrounding the liner, comprising: contacting said silicon modified polyolefin internal tube liner with a coupling agent represented by: wherein X represents a moiety that is capable of bonding to said thermoset epoxy matrix by a chemical reaction; R 1 represents a bivalent organic moiety or a bond; R is selected independently for each occurrence from the group consisting of H, alkyl, alkenyl, alkynl, halogen, aralkyl, aryl, polycyclyl and a carbocycle; and OR 3 is alkoxy or hydroxyl to form a tie-layer, contacting the tie-layer to a thermoset epoxy matrix to form a composite tube and exposing the composite tube to conditions sufficient to create adhesion between the polyolefin internal tube liner and the thermoset epoxy matrix.