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Canon Kabushiki Kaishahas Patents Method for Producing a Pigment

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,737,270 B2
 Canon Kabushiki Kaishahas has been granted a patent for a method for producing a copper phthalocyanine pigment or titanyl phthalocyanine pigment. The method is comprised of a step of obtaining a mixture by mixing at least one compound selected from the group of phthalonitrile, phthalonitrile derivative, isoindoline derivative and subphthalocyanine derivative, and a compound supplying copper or titanium with a solvent; and a step of holding the mixture at not less than a temperature where a subcritical state or a supercritical state of the solvent occurs to obtain the pigment by reacting the compounds.

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