Radiation-crosslinking and thermally crosslinking pu systems...

Details Radiation-crosslinking and thermally crosslinking pu systems... Radiation-crosslinking and thermally crosslinking pu systems...

C - Chemistry, Metallurgy

08

G

C08G 18/02 (2006.01) C07D 273/04 (2006.01) C08G 18/42 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01) C08K 5/00 (2006.01) G03H 1/00 (2006.01) G11C 13/00 (2006.01)

Patent

CA 2683901

The present invention relates to polyurethane compositions which cure by radiation and thermal action with crosslinking, and use thereof for the production of holographic media. The polyurethane compositions of the invention comprise A) one or more iminooxadiazinedione- group-containing polyisocyanates, B) one or more polyfunctional, isocyanate-reactive compounds, C) one or more compounds having groups which on exposure to actinic radiation with ethylenically unsaturated compounds with polymerization (radiation-curing groups), D) optionally one or more free radical stabilizers and E) one or more photoinitiators.

L'invention concerne des compositions de polyuréthane qui réticulent par radiation et par action thermique, et leur utilisation pour produire des supports holographiques. Les compositions de polyuréthane de l'invention comprennent A) un ou plusieurs polyisocyanates contenant un groupe iminooxadiazinedione, B) un ou plusieurs composés polyfonctionnels réagissant aux isocyanates, C) un ou plusieurs composés présentant des groupes qui réagissent lorsqu'ils sont exposés aux rayons actiniques par polymérisation (groupes à réticulation par radiation) avec des composés éthyléniquement insaturés, D) éventuellement un ou plusieurs stabilisateurs de radicaux libres et E) un ou plusieurs photoamorceurs.

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