Organoborane amine complex polymerization initiators and...

C - Chemistry – Metallurgy – 09 – J

Patent

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C09J 175/02 (2006.01) C08F 4/52 (2006.01) C08G 18/32 (2006.01) C08G 18/80 (2006.01) C09J 133/10 (2006.01) C09J 175/04 (2006.01)

Patent

CA 2465322

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 4.0:1Ø 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.

L'invention porte sur une composition à deux composants provoquant le durcissement d'un ou plusieurs monomères polymérisables qui durcissent losqu'exposés à des radicaux libres. Ladite composition comporte d'une part un complexe d'organoboraneamine, et d'autre part un isocyanate capable de décomplexer le complexe d'organoborane lorsque le rapport atomes d'azote de l'amine/atomes de bore dépasse 4,0/1,0. Dans une autre exécution, l'invention porte sur une composition polymérisable à deux composants comportant (I) d'une part (a) un complexe d'organoboraneamine, et (II) d'autre part (b) un ou plusieurs monomères, oligomères or polymères insaturés en oléfines, et capables de se polymériser par polymérisation des radicaux libres, (c) une quantité efficace d'un composé entraînant la dissociation du complexe, et donc la libération du borane qui provoque la polymérisation du ou des monomères, oligomères or polymères insaturés en oléfines; le composé entraînant la dissociation du complexe restant séparé du complexe jusqu'à ce que le lancement de la polymérisation soit désiré, et (d) un matériau réglant la chaleur de la réaction de polymérisation pour maintenir l'adhérence au substrat; ledit matériau pouvant être présent dans la partie (I) ou la partie (II) ou dans les deux.

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