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AssigneeNippon Kayaku Kabushiki Kaisha
InventorsTakafumi Fujii, Hirokazu Kitayama, Shinichi Namba
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The present invention relates to a phthalocyanine colorant characterized in that it has, as substituents, at least one unsubstituted sulfamoyl group and at least one substituted sulfamoyl group, the total number of these groups being 2 to 4, the substituent on the substituted sulfamoyl group has a substituted triazinyl group bonded thereto through a crosslinking group, and the unsubstituted sulfamoyl group and the substituted sulfamoyl group are bonded to the phthalocyanine ring at the β-position. Said phthalocyanine colorant is suitable for use in an ink, especially a cyan ink, for an ink-jet printer. A printed matter obtained by printing with said ink is excellent in light fastness, ozone fastness and moisture fastness.
A phthalocyanine colorant represented by Formula (1)
A method for producing a phthalocyanine colorant comprising subjecting derivatives of 4-sulfophthalic acid selected from the group consisting of 4-sulfophthalic acid, 4-sulfophthalic anhydride, 4-sulfophthalimide, 4-sulfophthalonitrile, 4- or 5-sulfo-2-cyanobenzamide, 5-sulfo-1,3-diiminoisoindolin and salts thereof or reaction of said derivatives of 4-sulfophthalic acid to reaction with themselves or subjecting said derivative of 4-sulfophthalic acid to reaction with a derivative of a phthalic acid (anhydride) in the presence of a copper compound to obtain a compound or a salt thereof, which is reacted with a chlorinating reagent to convert a sulfonic acid group to a chlorosulfonyl group, followed by further reaction with an organic amine represented by the following Formula (X)
A phthalocyanine colorant which has not less than 60% of a compound substituted at the β-position and not more than 40% of a compound substituted at the α-position in a phthalocyanine colorant represented by Formula (14) as shown below:
Dependencies are inferred from the claim text.