Liquid uncrosslinked michael addition oligomers prepared in...

C - Chemistry – Metallurgy – 08 – L

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C08L 35/02 (2006.01) C08F 222/10 (2006.01)

Patent

CA 2500205

The uncrosslinked liquid oligomeric compositions of this invention are made by the Michael addition reaction of acetoacetate-functional donor compounds with multifunctional acrylate acceptor compounds where the equivalent ratios of multifunctional acrylate to acetoacetate vary from >=1:1 to >= 13.2:1 depending on the functionality of both multifunctional acrylate and acetoacetate in the presence of a catalyst comprising an epoxy moiety and a quaternary salt. Unusable gelled or cured oligomer products occur below the claimed ranges. The liquid oligomers of this invention are further crosslinked to make coatings, laminates and adhesives.

Les compositions oligomères liquides non réticulées de l'invention sont obtenues par la réaction à addition de Michael de composés donneurs à fonction acétoacétate avec des composés accepteurs à multifonctions acrylate, les rapports équivalents entre acrylate multifonctions et acétoacétate variant entre =1:1 et = 13.2:1 selon la fonctionnalité à la fois de l'acrylate multifonctions et de l'acétoacétate en présence d'un catalyseur comprenant une fraction époxy et un sel quaternaire. Des produits en gel ou durcis inutilisables apparaissent au-dessous des plages spécifiées. Les oligomères liquides de l'invention sont ensuite réticulés pour la fabrication de revêtements, de laminés ou d'adhésifs.

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