C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/63 (2006.01) C08G 18/78 (2006.01) G03H 1/02 (2006.01) G11C 13/04 (2006.01)
Patent
CA 2683902
The present invention provides polyurethane Systems which cure by radiation and thermal action with crosslinking, and use thereof for the produetion of holographic media. The polyurethane compositions of the invention comprise A) polyisocyanates, B) polyols, comprising at least one poly(.epsilon.-caprolactone)polyester polyol, C) Compounds having groups which react on exposure to actinic radiation with ethylenically unsaturated Compounds with polymerization (radiation-curing groups), D) optionally free radical stabilizers and E) photoinitiators.
L'invention concerne des systèmes 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) des polyisocyanates, B) des polyols comprenant au moins un poly(.epsilon.-caprolactone)polyester polyol, C) des 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 des stabilisateurs de radicaux libres et E) des photoamorceurs.
Blum Harald
Bruder Friedrich-Karl
Niesten Meike
Stoeckel Nicolas
Strazisar Stephanie
Bayer Materialscience Ag
Bayer Materialscience Llc
Fetherstonhaugh & Co.
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