Patent ID: 7371466

Claim:
A polymerisable adhesive composition for bonding a low surface energy substrate to a similar or different substrate, comprising: a) at least one free-radically polymerisable monomer component, b) an effective amount or an initiator system for initiating polymerisation of the free-radically polymerisable monomer, said initiator system comprising an initiator compound of the formula I: wherein R 1 is C 1 -C 10 alkyl, R 2 , R 3 and R 4 , which may be the same or different, are C 1 -C 10 alkyl or C 3 -C 10 cycloalkyl, phenyl, or phenyl-substituted C 1 -C 10 alkyl or C 3 -C 10 cycloalkyl, provided that any two of R 1 -R 4 may optionally be part of a carbocyclic ring, and M + is a metal ion, or a quaternary ammonium cation, and c) an aziridine-functional material, which is a two-part composition in which the free-radically polymerisable monomer component is provided in part A and the initiator compound is provided in part B, wherein the weight ratio of part A to part B is in the range from 8:10 to 10:8.