Patent ID: 8158735

Claim:
A polymerizable composition for bonding a low surface energy substrate to a similar or different substrate, comprising: a) at least one free-radically polymerizable monomer component, b) an effective amount of an initiator system for initiating polymerization of the free-radically polymerizable monomer, said initiator system comprising: alkylated borohydride or tetraalkyl borane metal or ammonium salts comprising formula VI below: wherein R 10 is C 1 -C 10 alkyl, R 11 and R 12 , which may be the same or different, are selected from the group consisting of H, D, C 1 -C 10 alkyl, C 3 -C 10 cycloalkyl, phenyl, phenyl-substituted C 1 -C 10 alkyl and phenyl-substituted C 3 -C 10 cycloalkyl, provided that any two of R 10 -R 12 may optionally be part of a carbocyclic ring, R 13 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 14 -R 17 , which may be the same or different, are selected from the group consisting of 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 and aryl C 1 - C 10 cycloalkyl, provided that any two of R 14 -R 17 may be part of an optionally unsaturated carbocyclic ring; c) a polymerizable siloxane, wherein the polymerizable siloxane is formed from (i) at least one silane within the formula R 1 m R 2 p Si(X) 4-(m+p) A, wherein R 1 is a (meth)acrylate functional group, or a hydrolyzable group, and R 2 may be the same or different and may be selected from monovalent ethylenically unsaturated radicals, hydrogen, C 1-12 alkyl, C 6-12 aryl, C 7-18 alkylaryl, or a hydrolyzable group, X is a hydrolyzable group, m is an integer from 1 to 3, and m+p is an integer from 1 to 3; (ii) at least one silane within the formula R 3 q Si(X) 4-q B, wherein R 3 may be the same as or different from R 2 above and may be selected from monovalent ethylenically unsaturated radicals, hydrogen, C 1-12 alkyl, C 6-12 aryl, and C 7-18 alkylaryl, and q is an integer from 1 to 3; or combinations thereof, reacted with at least another silane within the formula of R 4 r R 5 s Si(X) 4-(r+s) C, wherein R 4 and R 5 may be the same or different and may be selected from monovalent ethylenically unsaturated radicals, hydrogen, C 1-12 alkyl, C 6-12 aryl, C 7-18 alkylaryl, r is an integer from 1 to 3, and r+s is an integer from 1 to 3, provided the polymerizable siloxane formed contains at least one hydrolyzable group, X.