| US 7,476,263 B2 | ||
| Coloring method of tangible matter having polyamide bond and tangible matter colored by such method | ||
| Masahiro Nakazaki, Neyagawa (Japan); Kunihiro Ohshima, Neyagawa (Japan); Kiyoshi Donowaki, Chikushino (Japan); and Kentaro Kawamura, Fukuoka (Japan) | ||
| Assigned to Kurashiki Boseki Kabushiki Kaisha, Kurashiki-shi (Japan); and Fukuoka Prefectural Government, Fukuoka-shi (Japan) | ||
| Appl. No. 10/568,950 PCT Filed Nov. 08, 2004, PCT No. PCT/JP2004/016544 § 371(c)(1), (2), (4) Date Dec. 13, 2006, PCT Pub. No. WO2005/047591, PCT Pub. Date May 26, 2005. |
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| Claims priority of application No. 2003-382358 (JP), filed on Nov. 12, 2003. | ||
| Prior Publication US 2007/0089247 A1, Apr. 26, 2007 | ||
| Int. Cl. D06P 3/24 (2006.01) | ||
| U.S. Cl. 8—517 [8/595; 8/596; 8/608; 8/404] | 4 Claims |
| 1. A coloring method of a tangible matter having a polyamide bond, consisting essentially of
treating the tangible matter having a polyamide bond with an aqueous solution containing an aromatic derivative having one
or more hydroxyl groups selected from the group consisting of dihydroxybenzoic acid, dihydroxybenzaldehyde, trihydroxybenzoic
acid and trihydroxybenzaldehyde, and a metal salt selected from the group consisting of iron (II or III) salt, copper salt,
aluminum salt and nickel salt, wherein the salt is a nitrate, sulfate, chloride, acetate or citrate, at a temperature of 45°
C. to 100° C., simultaneously or separately, wherein the treatment time ranges from 0.5 to 3 hours and the tangible matter
is colored without using any dye.
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