Patent ID: 7361432
Filing Date: 2008-04-22
Classification: C08F,G03F,G03H

Abstract:
1. A volume phase-type hologram recording material composition to be used for recording intensity distribution of light and shade of an interference fringe obtained by making light interfere as a change in refractive index, characterized in that the composition comprises a thermoplastic resin (A) which is soluble in an organic solvent, a radical polymerizable compound (B) which is solid at an ordinary temperature and at ordinary pressure and has a 9,9-diarylfluorene skeleton and at least one radical polymerizable unsaturated double bond, a plasticizer (C) and a photopolymerization initiator (D), wherein a weight percentage ratio of the thermoplastic resin (A), the radical polymerizable compound (B) and the plasticizer (C), (A):(B):(C) is 10 to 80:10 to 80:10 to 80, and a weight percentage ratio of the radical polymerizable compound (B) and the plasticizer (C), (B):(C) is 1:1.5 to 1:6.5, wherein the thermoplastic resin (A) is selected from the group consisting of polyvinyl acetate, polyvinyl butyrate, polymethyl methacrylate, cellulose acetate butyrate, a copolymer of cyclic aliphatic (meth)acrylate and methyl (meth)acrylate and combinations thereof, wherein the radical polymerizable compound (B) is selected from the group consisting of 9,9-bis[4-(3-acryloyloxy-2-hydroxy)propoxyphenyl]fluorene, 9,9-bis(4-methacryloyloxyphenyl)fluorene, 9,9-bis(4-acryloyloxyphenyl)fluorene, 9,9-bis[4-(2-methacryloyloxyethoxy)phenyl]fluorene, 9,9-bis[4-(2-acryloyloxyethoxy)phenyl]fluorene, 9,9-bis[4-(3-acryloyloxy-2-hydroxy)propoxy-3-methylphenyl]fluorene, 9,9-bis [4-[2-(3-acryloyloxy-2-hydroxy-propoxy)-ethoxy]phenyl]fluorene and combinations thereof, wherein the plasticizers (C) is selected from the group consisting of dimethyl phthalate, diethyl phthalate, dioctyl phthalate, dimethyl adipate, dibutyl adipate, dimethyl sebacate, diethyl sebacate, dibutyl sebacate, diethyl succinate, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, tricresyl phosphate, glyceryl triacetate, 2-ethylhexyl acetate, triphenyl phosphate, dibutylhydrodiene phosphate and combinations thereof, and wherein a refractive index of the radical polymerizable compound (B) is larger than a weighted mean of that of the thermoplastic resin (A) and that of the plasticizer (C).