Method of preparing a solution of sulfonated aryl azo/diaryl gua

Details Method of preparing a solution of sulfonated aryl azo/diaryl gua Method of preparing a solution of sulfonated aryl azo/diaryl gua

1990-02-02

1991-09-17

Group, Karl

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

8501, 8661, 8680, 8681, 8682, 8689, 8690, C09D 1102

Patent

active

050491890

ABSTRACT:
A liquid dyestuff, useful as a major component of a ballpoint ink is prepared. A dye base, having both a sulfonic acid group and an azo group bonded to the same aromatic ring system, is provided in the aqueous phase of a two-phase system in which the organic phase is about 30 percent or more benzyl alcohol. In this two-phase system, the dye base is complexed with a diaryl quanidine, and the resulting dye concentrates in the organic solvent phase.

REFERENCES:
patent: 3915630 (1975-10-01), Renault et al.
patent: 3915952 (1975-10-01), Sailer et al.
patent: 4370144 (1983-01-01), Skelly et al.

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