Photopolymerizable compositions

Details Photopolymerizable compositions Photopolymerizable compositions

G - Physics

03

F

96/172, 96/57

G03F 7/032 (2006.01) G03F 7/00 (2006.01)

Patent

CA 1229257

PHOTOPOLYMERIZABLE COMPOSITIONS Abstract of the Disclosure Novel photopolymerizable compositions are provided which comprise a dye ssnsitizer, a branched polyethylenimine as a polymerization initiator and a free radical polymerizable ethylenic unsaturated monomer. In the preferred embodiments, the branched polyethylenimine is used in combination with lithium acrylate. This combination provides dry coatings which may be stored for extended periods prior to being activated for imaging, and which produce volume holograms of very high resolution and diffraction efficiency. Methods of increasing the resistance of the hologram to changes induced by high humidity also are disclosed.

461726

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