Phthalocyanine dye and use thereof for ink-jet printing - Patents

Phthalocyanine dye and use thereof for ink-jet printing

Patent Agent: Nields & Lemack - Westboro, MA, US
Patent Inventors: Takafumi Fujii, Hirokazu Kitayama, Shinichi Namba
Applicaton #: 20070022903
Class: 106031470 (USPTO)
Related Patents: Compositions: Coating Or Plastic, Miscellaneous, Marking, Inks, Organic Dye Containing, Organic Nitrogen Compound Containing, The Nitrogen Is A Ring Member Of A Heterocyclic Ring,
02/01/07

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 ?¸-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.
DISCLOSURE OF THE INVENTION
[0013] After studying in detail phthalocyanine series colorants having good hue, excellent light fastness and ozone fastness, the present inventors have found that the above problems can be solved by using a specific phthalocyanine series colorant as a colorant for an ink and thus have completed the present invention. In more detail, the present invention relates to a metallo phthalocyanine colorant represented by Formula (1) as shown below, having both a sulfamoyl group substituted by substituents having triazinyl ring and an unsubstituted sulfamoyl group at a specific substitution position (.beta.-position: to be described later), the present inventors have found that said has good cyan hue and is superior in light fastness (durability to light), moisture fastness (durability under high humidity) and also ozone fastness (durability to ozone gas) and free from bronze phenomenon (also called bronzing phenomenon) and have completed the present invention.
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