Photosensitive Film for Holographic Recording and Production Method Thereof

A photosensitive coating A comprising a photosensitive polymer coating and a solvent, wherein the photosensitive polymer coating contains the following ingredients in weight percents based on the total weight of the photosensitive polymer coating:

• film former 20%-80%
• monomers 10%-70%
• photoinitiator 0.5%-7%
• chain transfer agent 0.3%-5%
• photosensitizer 0.05-2%
• wherein the film former is selected from the group consisting of poly(methyl methacrylate), poly(butyl cellulose acetate), a butyl cellulose acetate-ethyl vinyl ether copolymer, a blend of polyvinyl butyral and cellulose acetate, a vinyl acetate-butyl acrylate-acrylic acid terpolymer, polystyrene-acrylonitrile, and a mixture of the polymers above and a fluoropolymer;
• the monomers are two or more monomers selected from ethylenically unsaturated monomers;
• and
• the photoinitiator is 2,4,6-triphenyl imidazolyl dimer, and;
• the photosensitizer is selected from the group consisting of erythrosin B, diethylamino-benzylidene cyclopenpanone, michler's ketone, and 1,3,3-trimethyl-2-[5-(1,3,3-trimethyl-2-indolylidene)-1,3-pentadiene]indole iodide;
• and
• the chain transfer agent is selected from the group consisting of 2-mercaptobenzoxazole, dodecanethiol and mercaptobenzothiazole.