Adhesive compositions for bonding passive substrates such as...

C - Chemistry – Metallurgy – 09 – J

Patent

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C09J 4/00 (2006.01) C09J 4/06 (2006.01)

Patent

CA 2409650

Adhesive compositions are disclosed which cure rapidly and completely on confinement between passive substrates, such as magnesium alloys, that are deficient in transition metals and transition metal ions. The compositions include one or more acrylate resins, one or more peroxy free radical initiators, one or more onium salts, and an accelerator such as acetylphenyl hydrazine desirably in an amount of about 1.0 % or less by weight of the composition. These compositions provide exceptional bonding to such substrates without the need for a transition metal primer. Methods of making and using such compositions are also disclosed.

L'invention concerne des compositions adhésives qui durcissent rapidement et complètement lorsqu'elles sont confinées entre des substrats passifs, tels que des alliages de magnésium, qui sont déficients en métaux de transition et en ions de métaux de transition. Les compositions comprennent une ou plusieurs résines aux acrylates, un ou plusieurs initiateurs de radicaux libres peroxy, un ou plusieurs sels onium, et un accélérateur tel que l'acétylphénylhydrazine de préférence en quantité de 1,0 % environ ou moins en poids de la composition. Ces compositions permettent d'obtenir une liaison exceptionnelle sur de tels substrats sans nécessité d'une amorce de métal de transition. L'invention concerne aussi des procédés de fabrication et d'utilisation de ces compositions.

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