Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making radiation-sensitive composition
Reexamination Certificate
2011-08-16
2011-08-16
RoDee, Christopher (Department: 1721)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making radiation-sensitive composition
C430S078000, C540S141000
Reexamination Certificate
active
07998650
ABSTRACT:
Disclosed herein is a method for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of mixing 30˜100 wt % sulfuric acid and an oxytitanium phthalocyanine crude in a mixing ratio between 100:1 and 1:1, homogeneously grinding the mixture in a wet grinder filled with zirconia or glass beads as grinding media at −20° C.˜60° C. for 0.1˜24 hours, and removing the grinding media from the ground mixture using a solvent. According to the method, oxytitanium phthalocyanine usable as a high-quality charge generating material can be prepared without the use of expensive and difficult-to-handle reactants, such as trifluoroacetic acid and pentafluoropropionic acid. Further disclosed is an oxytitanium phthalocyanine charge generating material prepared by the method.
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Yao, Jiachang et al., “A Convenient Synthetic Method for Pure Oxo (phthalocyaninato) titanium (IV) and Application to Other Metal Phthalocyanines”, Bull. Chem. Soc. Jpn., vol. 68, No. 3, pp. 1001-1005, 1995.
Jung Ki Suck
Kwon Jong Ho
Park Seong Soo
Shin Jun Sik
Son Woo Ho
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
PHTALOS Co., Ltd.
Rodee Christopher
Zhang Rachel L
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