Ultraviolet radiation curable pressure sensitive acrylic...

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 175/14 (2006.01) C09J 5/02 (2006.01) C09J 7/02 (2006.01)

Patent

CA 2757455

A process for making UV curable pressure sensitive adhesive compositions by clerivatizing an acrylic polymer with a derivatizing agent prepared from a hydroxy- functional acrylate monomer and a diisocyanate. The derivatizing agent typically has a ratio of hydroxy-functional acrylate monomer to diisocyanate greater than about 1:1. Also disclosed are UV curable pressure sensitive adhesives made with the derivatizing agent and methods for adhering substrates with pressure sensitive adhesive compositions.

L'invention porte sur un procédé pour la fabrication de compositions adhésives autocollantes durcissables par UV par la formation d'un dérivé d'un polymère acrylique avec un agent de formation de dérivé préparé à partir d'un monomère acrylate à fonctionnalité hydroxy et d'un diisocyanate. L'agent de formation de dérivé a typiquement un rapport du monomère acrylate à fonctionnalité hydroxy au diisocyanate supérieur à environ 1:1. L'invention porte également sur des adhésifs autocollants durcissables par UV fabriqués avec l'agent de formation de dérivé et sur des procédés pour le collage de substrats avec les compositions adhésives autocollantes.

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