The invention is a two part composition useful for initiating cure of one
or more polymerizable monomers which cure when exposed to free radicals
comprising in one part an organoboraneamine complex and in a second part
an isocyanate which is capable of decomplexing the organoborane complex
wherein the ratio of amine nitrogen atoms to boron atoms is greater than
4.0:1.0. In another embodiment the invention is a two part polymerizable
composition comprising
part 1, a) an organoborane amine complex; and
part 2, b) one or more of monomers, oligomers or polymers having olefinic
unsaturation which is capable of polymerization by free radical
polymerization
c) an effective amount of a compound which causes the complex to
disassociate thereby freeing the borane to initiate polymerization of the
one or more monomers, oligomers or polymers having olefinic unsaturation
wherein the compound which causes disassociation of the complex is kept
separate from the complex until initiation of polymerization is desired;
and
d) a material which manages the heat of the polymerization reaction such
that adhesion to the substrate is maintained, which material can be
located in either part 1, part 2 or both parts.
