Pigments and photoconductive elements sensitive to infrared radiation
AssigneeEastman Kodak Company
InventorsYann Hung, Michael T. Regan, William J. Staudenmayer
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Abstract
A novel C-centered monoclinic bromoindium phthalocyanine pigment is obtained by reacting high-purity diiminoisoindoline with indium tribromide in the solvent, 1-methyl-2-pyrrolidinone. Multiactive photoconductive elements prepared by dispersion-coating a charge-generation layer containing this pigment have high sensitivity to near-infrared radiation.
Claims6
A method of preparing a bromoindium phthalocyanine pigment which comprises reacting diiminoisoindoline of a purity of at least 99 percent by weight with indium bromide in a solvent comprising 1-methyl-2-pyrrolidinone.
A C-centered monoclinic bromoindium phthalocyanine pigment having X-ray diffractogram major peaks at Bragg angles (2.THETA.) of 7.4.degree., 16.7.degree., 25.3.degree., 27.5.degree. and 28.4.degree..
Dependencies are inferred from the claim text.