Reference

Oxazine derivatives

Oxazine derivatives. Gertisser, Berthold; Henzi, Beat (Sandoz-Patent-G.m.b.H., Switz.). Ger. Offen. DE 2701677 4 Aug 1977, 26 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B019-00. 64071-88-1 which is the cas registry number is also used here. PRIORITY: CH 76-1314 3 Feb 1976. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Oxazine dyes(I; R, R1 = H, MeO; R2 = H, Me) were prepd. by nitrosating 3-(dimethylamino)phenols and treating the nonisolated nitroso intermediates with 3-aminophenyl acetates in the presence of acid or by nitrosating 3-(dimethylamino)phenyl acetates and treating the nonisolated intermediates with 3-aminophenols in the presence of acid. For example, m-Me2NC6H4OH [99-07-0] was nitrosated with NaNO2-HCl in DMF and the resulting nitroso deriv. treated (without isolation) with 4,2-AcO(H2N)C6H3OMe [64071-89-2] to give I(R = R2 = H, R1 = MeO) [64071-90-5] which crystd. from the reaction mixt.s. .

Method of image recording

Method of image recording. Takeda, Takashi; Hayakawa, Yoshihide (Fuji Photo Film Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 61188535 A2 22 Aug 1986 Showa, 10 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: G03C001-06. APPLICATION: JP 85-29894 18 Feb 1985. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) An image-recording material contains a light-sensitive Ag halide, a polymerizable vinyl monomer, a reducing agent selected from compds. of the formula I or II (R-R2 = H, alkyl; R3-R6 = H, alkyl, halo) and a hydrazine deriv. of the formula III (R, R1 = H, alkyl, R1 may also be alkoxy). The imaging method comprises (1) imagewise exposure to form the latent image, and then (2) heating to polymerize the vinyl monomer at the site of the latent image, thus producing a polymer image on the material. The method provides a polymer image by a dry thermal process, using a small quantity of Ag halide. It has high sensitivity comparable with Ag halide photog. materials. 4986-89-4 and 99-07-0 are cas registry numbers of chemicals which are used as reagents here. Thus a mixt. of (1) vinyl monomer emulsion consisting of pentaerythritol tetracrylate (monomer), phthalocyanine, poly(vinyl alc.), etc., (2) a gelatinous dispersion of benzotriazole Ag salt, (3) Ag(Cl,Br)/gelatin emulsion (Br/Cl molar ratio = 1/1), (4) p-methoxyphenol, (5) guanidine triacetate, (6) b-acetylphenylhydrazine, etc., was coated on a PET substrate to the dry thickness of 5 mm (0.08 g-Ag/m2). The obtained material was imagewise exposed, heated for 40 s at 125°, and immersed in water for 60 s to wash out the unexposed part. A clear neg. image of blue color was obtained. .