Patent ID: 7273531

Claim:
A method for preparing a composite article comprising: providing a fluoropolymeric substrate having a surface comprising at least one fluoropolymer; contacting at least a portion of the surface with a modifying composition comprising at least one species selected from the group consisting of wherein R represents hydrogen or an alkyl or cycloalkyl group having from 1 to 18 carbon atoms or aryl, alkaryl, or aralkyl group having from 6 to 18 carbon atoms; X represents O or NH; and each of R 1 , R 2 , R 3 , and R 4 independently represents H, an alkyl group having from 1 to 18 carbon atoms, an alkenyl group having from 1 to 18 carbon atoms, an aryl group having from 6 to 10 carbon atoms, or any two of R, R 1 , R 2 , R 3 , and R 4 taken together represent an alkylene group having from 2 to 6 carbon atoms, with the proviso that at least one of R 1 and R 2 or at least one of R 3 and R 4 is not H; and exposing at least a portion of the surface contacted by the modifying composition to actinic radiation and photochemically modifying said at least a portion of the surface contacted by the modifying composition; and bonding the photochemically modified surface to a second substrate.