Detail of "6143-80-2"

Reference

Light-sensitive multilayer material

Light-sensitive multilayer material. Fan, Roxy N. (du Pont de Nemours, E. I., and Co., USA). Ger. Offen. DE 2623925 16 Dec 1976, 23 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: G03C005-50. PRIORITY: US 75-583454 3 Jun 1975. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic Processes) A 2-layer pos.-working photopolymerizable system, which is solvent developed after exposure and then toned, is described. Thus, a copolymer of methyl methacrylate with methacrylic acid (90:]0) 75, polyethylene glycol dimethacrylate 57.5, 2-o-chlorophenyl-4,5-diphenylimidazole dimer 3.0, 2-(stilbyl-4'')-(napho-1'2':4,5)-1,2,3-triazole-2''-sulfonic acid phenyl ester 0.79, 7-(4-chloro-6-diethylamino-1,3,5-triazine-2'-yl)-amino-3-phenylcoumarin 3.55, 2,2-dihydroxy-4-methoxybenzophenone 0.32, 2-mercaptobenzothiazole 2.0, MeOH 77.5, and CH2Cl2 870 parts were mixed together and coated on a 13.mu. polyester support to a dry coating wt. of 43 mg/dm2. A 2nd soln. contg. cis-polybutadiene 360, a copolymer of butadiene and styrene 240, tetrabis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)proprionate]met hane 3.0, and CH2Cl2 5400 parts was coated on 25.mu. polyester support, which had been treated with dimethylsiloxane, to a dry coating wt. of 120mg/dm2. The dry layers were laminated together at 49.degree. at a pressure of 2.8 kg/cm2. The 25.mu. polyester support was removed and the coating laminated with a 64.mu. polyester film. The assembly was exposed through the 13.mu. support using a pos. transparency and a 2 stepwedge on a NuArc Plate Maker for 16 s, the 13.mu. 6143-80-2 and 111-21-7 which are cas registry numbers of substances are two of reagents here. supported removed, and devolped in a soln. contg. H2O 750, Bu Cellosolve 60, octylphenoxypolyethoxyethanol (10% in H2O) 2 mL, Na silicate (37.6 % solids) 66.5 g, and H2O to 1 L. This removed all of the unexposed photopolymer and bared the tacky elastomeric layer. After drying the film was toned with pigment which adheres only to the tacky layer, resulting in a clean pos. image. .