Patent ID: 6867271

Claim:
A polymerizable adhesive composition for bonding a low surface energy substrate to a similar or different substrate, comprising: a) at least one free-radically polymerizable monomer component, and b) an effective amount of an initiator system for initiating polymerization of the free-radically polymerizable monomer, said initiator system comprising: i) alkylated borohydrides comprising formula VI below: wherein R 1 is C 1 -C 10 alkyl, R 2 and R 3 , which may be the same or different, are H, D, 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 3 may optionally be part of a carbocyclic ring, R 4 is H, D or C 1 -C 10 alkyl, and M + is a metal ion or a quaternary ammonium ion comprising formula VII below wherein R 5 -R 8 , which may be the same or different, are C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 3 -C 10 cycloalkyl, aryl, C 1 -C 10 alkylaryl, aryl C 1 -C 10 alkyl or aryl C 1 -C 10 cycloalkyl, provided that any two of R 5 -R 8 may be part of an optionally unsaturated carbocyclic ring; and ii) an aziridine-containing compound; and c) a carrier for the initiator system of b), which renders the composition having a flash point greater than 140° F.