| 摘要 |
Light-sensitive compositions are produced by homogeneously mixing (A) a soluble, light-sensitive polymer being (i) a polymer carrying side substituents possessing unsaturation of the acryl or alkylacryl type, or (ii) a polycondensation product of an aliphatic or aromatic diol with an aliphatic dicarboxylic acid possessing side-chain unsaturation, and (B) a synergistic activating mixture consisting of two different activating agents of which one is benzophenone, p,p1 - bis - (dialkylamino) benzophenone or fluorenone, and the other is benzoin, benzoin methyl ether, anthraquinone, 2-methylanthraquinone, benzophenone, benzyl, xanthone, 1,3,5-triacetylbenzene, fluorenone, fluorene, biacetyl, propiophenone or benzaldehyde. Polymers (A) (i) specified are the reaction products of acrylic acid chloride or alkylacrylic acid chloride with polymers containing hydroxyl or thiol groups such as cellulose, starch and dextrin and their partial ethers and esters, polyvinyl alcohol and its partial acetals and ethers, vinyl alcohol copolymers, polyhydroxy polyethers derived from epichlorohydrin and 2,2 - bis - (4 - hydroxyphenyl) propane, thiolated gelatin, polythiolstyrene, polyvinyl mercaptan, and the condensation product of poly-(isophthalylidene - hexamethylenediamine) and thioglycolic acid. The compositions may also contain organic solvents. |
