Amine organoborane complex polymerization initiators and polymerizable compositions

A polymerizable composition comprising

• a) an organoborane/amine complex wherein the organoborane is a trialkyl borane or an alkyl cycloalkyl borane and the amine is selected from the group of amines having an amidine structural component;
• aliphatic heterocycles having at least one nitrogen in the heterocyclic ring wherein the heterocyclic compound may also contain one or more nitrogen atoms, oxygen atoms, sulfur atoms, or double bonds in the heterocycle;
• an alicyclic compound having bound to the ring a substituent having an amine moiety wherein the alicyclic compound may have a second substituent which can contain one or more nitrogen, oxygen or sulfur atoms and/or one or two double bonds;
• primary amines which in addition to a primary amine have one or more hydrogen bond accepting groups of an ether, polyether, thioether or halogen wherein there is an alkylene chain of at least two carbon atoms between the primary amine and the hydrogen bond accepting group, such that due to inter- or intramolecular interactions within the complex the strength of the B—N bond is increased;
• and conjugated imines;
• and,
• 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 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.