Reference

1,4-Diamino-2,3-diphenoxyanthraquinone

1,4-Diamino-2,3-diphenoxyanthraquinone. (Sumitomo Chemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59142253 A2 15 Aug 1984 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09B001-505; C07C097-26. APPLICATION: JP 83-15835 1 Feb 1983. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title compd. (I) [6408-72-6] is prepd. by reacting 1,4-diamino-2,3-dihaloanthraquinones with PhOH [108-95-2] in an aq. medium in the presence of an acid scavenger and a quaternary ammonium compd. and/or a quaternary phosphonium compd. The method using the quaternary compd. gives I with brighter color and in higher yields than I prepd. by known methods. Thus, 1,4-diamino-2,3-dichloroanthraquinone [81-42-5] 3.07, aq. KOH 5.26, and PhOH 5.65 were mixed with benzyltriethylammonium chloride [56-37-1] 23.1 and H2O 7.7 parts, and the mixt. was kept at 100° for 20 h, filtered, washed with H2O, and dried to give 4.1 parts I, bright red on polyester fiber.

Thermal-transfer printing sheet with ink layer containing crystallization-preventing agent

Thermal-transfer printing sheet with ink layer containing crystallization-preventing agent. Obata, Satoshi; Haga, Katsuyoshi (Sony Corp., Japan). Jpn. Kokai Tokkyo Koho JP 2005014534 A2 20 Jan 2005, 9 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: B41M005-38. ICS: B41J031-00. APPLICATION: JP 2003-185765 27 Jun 2003. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) The sheet has a thermal-transfer dye layer contg. a crystn.-preventing agent with IO value (hydrophilic-oleophilic index calcd. from structure of org. compds.) ￡0.35 and solid (at room temp.) at 0.2-20 wt.There are some commonly used reagents with their cas registry numbers 35602-69-8 and 6408-72-6 in this article.% of the dry wt. of the dye layer on 31 side of a support. As dye crystn. in the thermal transfer layer is prevented, the sheet shows good storage stability and gives high d. images. .