Process for preparing oxytitanium phthalocyanine hydrate crystal

Details Process for preparing oxytitanium phthalocyanine hydrate crystal Process for preparing oxytitanium phthalocyanine hydrate crystal

1992-08-12

1994-03-01

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540143, 540142, 540144, C09B 6750

Patent

active

052909280

ABSTRACT:
A process for preparing an oxytitanium phthalocyanine hydrate crystal which, when dried at 100.degree. C. and 0.1 mmHg for 8 hours and then allowed to stand in air at room temperature for 12 hours, has a structural formula of TiOPc.multidot.(H.sub.2 O).sub.n, wherein Pc represents a phthalocyanine nucleus, and n represents a number of from 0.15 to 1, and elemental analysis values of C: 65.0 to 66.3%, H: 2.5 to 3.1%, and N: 18.5 to 19.3% is disclosed, which process comprises the steps of: mechanically grinding a mixture of oxytitanium phthalocyanine and an inorganic salt to convert the crystal form of the oxytitanium phthalocyanine to a crystal form showing a distinct peak in its X-ray diffraction pattern at a Bragg angle (2.theta..+-.0.2.degree. ) of 27.3.degree. and treating the resulting oxytitanium phthalocyanine crystal with a mixed solvent of water and a water-insoluble organic solvent. The oxytitanium phthalocyanine hydrate crystal obtained has doped therein a specific amount of water of crystallization and is stable in a solvent and also stable when used as an electrophotographic photoreceptor.

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Grant and Hackh's Chemical Dictionary, (New York, McGraw-Hill Books, (1987)), pp. 163-164, and 231-232.
Ono et al., Chem. Abs., vol. 114, (1991), Abs. 14915m.
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Yashiro et al., Chem. Abs., vol. 115, (1991), Abs. 170936v.
Suzuki et al., Chem. Abs., vol. 107, (1987), Abs. 87142x.
Takai et al., Chem. Abs., vol. 115, (1991), Abs. 102827k.
Chemical Abstracts, vol. 109, (1988), Abs. 8037g, Sakikubo et al.

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