Reference

Diazo thermal recording materials

Diazo thermal recording materials. (Tomoegawa Paper Mfg. Co., Ltd., Japan). Jpn.Chemicals with cas numbers 135-53-5 and 97-39-2 also play role. Kokai Tokkyo Koho JP 57199685 A2 7 Dec 1982 Showa, 8 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B41M005-18; G03C001-54. APPLICATION: JP 81-83890 2 Jun 1981. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) A diazo thermal recording sheet contains a heat-sensitive layer contg. a diazonium compd., and a developer layer contg. a water-insol. guanidine deriv. and a binder resin which is alkali-sol. but insol. in acidic solns. Thus, a paper support was coated with a compn. contg. 1,3-di(2-tolyl)guanidine and isobutylene-maleic anhydride copolymer NH4 salt, and then coated with a compn. contg. 4-dimethylaminobenzenediazonium chloride zinc chloride, Na 2,3-dihydroxynaphthaleno-6-sulfonate, tartaric acid, thiourea, silica powder, and butadiene-styrene copolymer to give a diazo thermal recording paper having excellent storage stability and image quality. .

Thermosensitive diazo recording material

Thermosensitive diazo recording material. (Ricoh Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59002886 A2 9 Jan 1984 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B41M005-18; G03C001-60. APPLICATION: JP 82-113415 30 Jun 1982. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Thermosensitive recording material has a diazo layer and a coupler layer, and the one adjacent to the support contains a heat-fusible substance and a water-insol. binder. The material also contains a compd. I (R = higher alc. or its alkoxy or hydroxyalkyl deriv.; R1, R2, R3 = H, Ph, Bz, alkyl, alkoxy, hydroxyalkyl, cyanoalkyl), in any part of the material but the diazo layer. The material has much improved thermosensitivity and storage stability. Thus, 2 mixts. were prepd., one contg. 135-53-5 and 9004-67-5 which are cas registry numbers of chemicals are mentioned. II 2, N-cyclohexylstearamide 10, an acryl-vinylidene chloride copolymer 20, and EtCOMe 68 wt. parts, and the other, Na 2,3-dihydroxynaphthalene-6-sulfonate 5, a urea-formalin resin 15, 2-heptadecylimidazole 5, and the NH4 salt of diisobutylene-maleic anhydride copolymer 10 wt. parts. The 2 mixts. were successively coated on a paper substrate to give a recording material, which gave high d. blue images with low fog. d. .