초록 ▼

Novel photopolymerizable compositions are provided which comprise a dye sensitizer, 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 lithiu

Novel photopolymerizable compositions are provided which comprise a dye sensitizer, 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.

대표청구항 ▼

A photopolymerizable composition comprising an ethylenic unsaturated monomer, a dye sensitizer, and a branched polyethylenimine, said dye sensitizer and said branched polyethylenimine providing a photopolymerization initiation system. The method of forming a photopolymer image which comprises imagew

A photopolymerizable composition comprising an ethylenic unsaturated monomer, a dye sensitizer, and a branched polyethylenimine, said dye sensitizer and said branched polyethylenimine providing a photopolymerization initiation system. The method of forming a photopolymer image which comprises imagewise exposing a photopolymerizable composition comprising an ethylenic unsaturated monomer, a dye sensitizer and a branched polyethylenimine to light absorbed by said dye sensitizer, said dye sensitizer and said branched polyethylenimine providing a photopolymerization system, thereby effecting imagewise photopolymerization of said monomer. The method of claim 22 wherein said ethylenic unsaturated monomer is a monovalent salt of acrylic acid. The method of claim 26 wherein said ethylenic unsaturated monomer is lithium acrylate. The method of claim 27 wherein said photopolymerizable composition includes poly-N-vinyl pyrrolidone.