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

1996-06-28

1998-11-10

Higel, Floyd D.

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

Organic compounds

Azo

534728, 534DIG2, C09B 4402, C09B 4404, C09D 1102

Patent

active

058346007

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: 3101988 (1963-08-01), Bossard et al.
patent: 3438963 (1969-04-01), Robbins
patent: 4251440 (1981-02-01), Kaeppeli
patent: 4264496 (1981-04-01), Durant
Chemical Abstracts, vol. 121, No. 8, 22 Aug. 1994, Abstract No. 85959j, K. Ito et al. Hydrophobic Cationic Azo Dyes and Thermal-Transfer Ink Ribbons Using Them, p. 153.

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