C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/02 (2006.01) C09D 11/00 (2006.01)
Patent
CA 2076074
A waterfast ink having 3.0% Food Black 2, 2.5% highly hydroxyethylated polyethyleneimine, 10.0% ammonium benzoate, and the balance water. The invention appears to function upon loss of water after printing by a polar neutralizing between the dye and the polyimine, which results in an affinity of the dye to paper. It is applicable to any dye having anionic solubilizing groups but not having quaternary ammonium and to any ammonium salt.
Aulick Rodney O.
Beach Bradley L.
Franey Terence E.
Mrvos James M.
Piekunka Ann M.
Lexmark International Inc.
Smart & Biggar
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