Patent TW-335457-B (TW)
Title: Optical recording medium
Inventor: SUZUKI YUKO
IPC: G11B7/24
Filed: 1994-10-18
Granted: 1998-07-01
Abstract: An optical recording medium comprising a transparent substrate, a reocrding layer on the transparent substrate, a metal reflective layer and one or more protective layer, laminated successively on the transparent substrate; the protective layer exposed to the environment is formed of an ultraviolet curable resin containing an organic filler and/or an inorganic filler having water absorbency and/or oil absorbency; the protective layer has a printable surface; wherein the ultraviolet curable resin comprises by weight: a) 1 to 80 parts hydrophilic polymer selected from groups comprising hydroxyethyl cellulose and copolymer thereof, hydroxypropyl cellulose and coplymers thereof, ethylene alcohol homopolymer and copolymers thereof, acryloylamino homopolymer and copolymers thereof, ethylene pyrrolidone homopolymer and coplymers thereof, and epoxyethane homopolymer and copolymers thereof; b) 20 to 98 hydrophilic monomer selected from groups comprising hydroxyethyl acrylate, methylhydroxyethyl acrylate, hydroxypropyl acrylate, methylhydroxypropyl acrylate, hydroxybutyl acrylate, methylhydroxybutyl acrylate, hydroxypentyl acrylate, methylhydroxypentyl acrylate, oxyhydroxypropyl acrylate, methyloxyhydroxy propyl acrylate, monoacrylate of dipolyglycol, monomethyl acrylate of dipolyglocol, monoacrylate of tripolyglocol, monomethyl acrylate of tripolyglycol, monomethyl acrylate of polyglycol, monoacrylate of dipolypropanediol, monomethyl acrylate of dipolypropanediol, monoacrylate of polypropanediol, monomethyl acrylate of polypropanediol, monomethyl acrylate of glycerin, diacrylate of glycerin, dimethyacrylate of glycerin, triacrylate of quaternary pentanol, trimethylacrylate of quarternary pentanol, acrylate of phenylglycidyl ether, methylacrylate of phenylglycidyl ether, pentaacrylate of diquaternary pentanol, pentamethylacrylate of diquaternary pentanol, diacrylate or dimethylacrylate of bisphenolA epoxy resin, dimethylacrylamide, dimethylmethylacrylamide, diethylacrylate, diethyl acrylamide, diethylmethylacrylamide, morphiline acrylamide, N-ethyl pyrrolidone, acrylic2-ethyl ethoxylate, methylacrylic2-ethylethoxylate, acrylic2-ethylmethoxylate, methylacrylic2-ethylmethoxylate, propyl acrylate, methylpropyl acrylate, glycidyl acrylate, methylglycidyl acrylate, hexaacrylate of diquaternary pentanol and hexaemthylacrylate of diquaternary pentanol; (c) 0 to 40 parts cross-linking monomer selected from the groups comprising triacrylate of trihydroxymethylmethane, trimethylacrylate of trihydroxymethylmethane, isocyanouric acrylate, diacrylate of 1,4 butanediol, trimethyacrylate of 1,4-butanediol, diacrylate of 1,6-adipodiol, dimethylacrylate of 1,6-adipodiol, diacrylate of pentanediol, dimethylacrylate of pentanediol, dicyclclopentene diacrylate, dicyclopentene dimethylacrylate, quadroacrylate of quaternary pentanol and quadromethylacrylate of quaternary pentane; and (d) 0.1 to 10 parts free radical initiator and the filler being water absorbent or oil absorbent organic filler and/or inorganic filler; and the organic filler is selectedat least from xylem, protein or celluose, and inorganic filler is selected at least from silicon, talcum, clay, calcium carbonate, calcium silicate, barium sulfate, mica, zirconium hydroxide, alumina, or zirconium oxide and zircodium oxide; and 1-80 parts curable resin per 100 parts ultraviolet light based on the weight of the filler.