申请人:NIPPON KAYAKU KABUSHIKI KAISHA
公开号:EP0373525A2
公开(公告)日:1990-06-20
A crystalline form of the dye represented by the following formula (1):
characterized by an X-ray diffraction pattern having a strong peak at the angle of diffraction (2ϑ) of 23.2° and relatively strong peaks respectively at the angles of diffraction (2ϑ) of 8.3°, 12.3°, 20.8°, 21.9°, 25.0°, 27.1°, 29.2° and 30.8° according to X-ray powder diffractometry through the use of a Cu-Kα line and a process for preparing the same by heat-treating a heat-instable crystalline form of the dye represented by the formula (1) in water, water containing a water-soluble organic solvent, or water containing an anionic or nonionic surfactant at a temperature of 40°C or above.
It withstands dyeing at high temperature, e.g. 130°C or higher, to provide dyed fibers having excellent fastness properties.
一种由下式(1)代表的染料结晶形式:
一种由下式(1)代表的染料的结晶形式,其特征在于X射线衍射图样在衍射角(2ϑ)为23.2°处具有强峰,在衍射角(2ϑ)为8.3°、12.3°、20.8°、21.9°、25.0°、27.1°、29.2°和30.8°处分别具有相对较强的峰。(2 ϑ) 8.3°、12.3°、20.8°、21.9°、25.0°、27.1°、29.2°和 30.8°,根据 X 射线粉末衍射法,通过使用 Cu-Kα 线和制备工艺,在 40°C 或以上的温度下,在水、含有水溶性有机溶剂的水或含有阴离子或非离子表面活性剂的水中对式 (1) 所代表的染料的热不稳定结晶形式进行热处理。
它可耐受高温染色,如 130°C 或更高温度,从而使染色纤维具有极佳的牢度特性。