Aqueous ink of pigment type
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Sep 18, 1996
filing date -
Feb 20, 1995
priority date (Note) -
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Abstract
The aqueous ink of a pigment type comprises a pigment, water, a water-soluble solvent and a sulfite, and may further comprise a dispersant. An example of the dispersant comprises a copolymer of a monomer (a) represented by general formula (A), and one or more monomers (b) selected from the group consisting of compounds represented by general formulae (B) and (C): ##STR1## wherein AO represents an oxyalkylene group having 2 to 3 carbon atoms, and n represents an integer of 110 to 300.
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