Reference

Thermal recording material containing leuco dye and color developer

All Rights Reserved. Thermal recording material containing leuco dye and color developer. Inufushi, Keiichi; Bito, Tsuneyoshi (Oji Paper Co.Chemicals with cas numbers 3236-71-3 and 88938-12-9 also play role., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2006346893 A 28 Dec 2006, 10pp. (Japanese). (Japan). CODEN: JKXXAF. APPLICATION: JP 2005-172633 13 Jun 2005. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) The material contains the leuco dye and the color developer 4-hydroxy-4'-isopropoxydiphenyl sulfone and a fluorene compd. I (R1 = H, C1-5 alkyl; R2 = OH, amino, -OCH2CH2OH) of 10-100 wt.% to the solid leuco dye. The material shows improved image stability, heat resistance, and recording sensitivity. .

Preparation of 9,9-bis(3-amino-5-alkyl-4-hydroxyphenyl)fluorene as monomer of heat-resistant electrically insulating tough polymers

Preparation of 9,9-bis(3-amino-5-alkyl-4-hydroxyphenyl)fluorene as monomer of heat-resistant electrically insulating tough polymers. Fujimoto, Masaki; Takashio, Miho; Iwabuchi, Atsushi (Nippon Kayaku Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2002363147 A2 18 Dec 2002, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C07C215-80.In this experiment, several chemicals are used like 88938-12-9 ICS: C07C201-08; C07C205-23; C07C213-02; C07B061-00; C08G073-06. APPLICATION: JP 2001-163735 31 May 2001. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 35 Title fluorene deriv., useful as a monomer (no data) for polybenzoxazoles, OH group-contg. polyimides, their precursors, etc., is prepd. by nitration of 9,9-bis(3-alkyl-4-hydroxyphenyl)fluorene and redn. of the resulting nitro deriv. Thus, nitration of 9,9-bis(3-methyl-4-hydroxyphenyl)fluorene gave 80% nitro deriv., which was hydrogenated over Pd/C to afford 92% 9,9-bis(3-amino-5-methyl-4-hydroxyphenyl)fluorene. .