Hydrophobic cationic dyes and thermal transfer ink ribbons using

Details Hydrophobic cationic dyes and thermal transfer ink ribbons using Hydrophobic cationic dyes and thermal transfer ink ribbons using

1998-07-14

1999-03-16

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

106 145, 106 315, 427144, 427148, 427151, 430338, 430340, 430343, 430519, C04B 902, B41M 312, G03C 173, G03C 1735

Patent

active

058832327

ABSTRACT:
Disclosed are diazahemicyanine hydrophobic cationic dyes represented by the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are lower alkyl groups having not more than 5 carbon atoms, R.sup.5 is a lower alkyl group having not more than 5 carbon atoms or a lower alkoxy lower alkyl group having not more than 6 carbon atoms, and Z.sup.- is a counter ion having a hydrophobic organic group, and a thermal transfer ink ribbon having a substrate and and ink layer laminated thereon containing said cationic dye.

REFERENCES:
patent: 3679656 (1972-07-01), Iizuka et al.
patent: 4039537 (1977-08-01), Kuhlthau

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