Ink-jet ink compositions containing modified macromolecular chromophores with covalently attached polymers
AssigneeHewlett-Packard Company
InventorsJoseph W. Tsang, John R. Moffatt
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Abstract
The present invention relates to ink-jet ink compositions that comprise modified pigment particles (macromolecular chromophores) having functional groups covalently attached for water solubility and polymer chains covalently attached to the pigments. These pigmented inks have enhanced smearfastness, enhanced print quality, improved bleed control, and improved resistance to water when applied to the media. Moreover, these inks have good viscosity and surface tension. These inks are useful in ink-jet printing, including thermal ink jet printing, piezoelectric ink jet printing, and continuous ink jet printing.
Claims18
An ink-jet ink composition comprising a macromolecular chromophore, said macromolecular chromophore comprises:
- a) at least one water-solublizing functional group;
- and
- b) at least one covalently attached polymer, wherein said polymer is covalently attached to said macromolecular chromophore through a polyolefinic group having the structure:
- R"--CR.dbd.C(H)R'
- wherein R can be H or methyl, R' can be H or an alkyl or aryl having from about 1 to about 10 carbons and R" can be any alkyl, alkenyl, aryl groups having from about 1 to 20 carbons and, optionally, heteroatoms;
- and wherein said polymer is obtained from monomers selected from the group consisting of:
- ##STR7## and mixtures thereof.
A method of ink-jet printing comprising printing on a medium an ink-jet ink composition comprising a macromolecular chromophore, wherein said macromolecular chromophore comprises:
- a) at least one water-solublizing functional group;
- and
- b) at least one covalently attached polymer, wherein said polymer is covalently attached to said macromolecular chromophore through a polyolefinic group having the structure:
- R"--CR.dbd.C(H)R'
- wherein R can be H or methyl, R' can be H or an alkyl or aryl having from about 1 to about 10 carbons and R" can be any alkyl, alkenyl, aryl groups having from about 1 to 20 carbons and, optionally, heteroatoms;
- and wherein said polymer is obtained from monomers selected from the group consisting of:
- ##STR8## and mixtures thereof.
Dependencies are inferred from the claim text.