Nigrosine dyes and process for preparing same

Details Nigrosine dyes and process for preparing same Nigrosine dyes and process for preparing same

1983-10-11

1986-11-25

Berch, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

8649, 430106, 544348, C07D24146, C09B 5700, C09D 1104, C09D 1100

Patent

active

046247092

ABSTRACT:
A novel substituted nigrosine dye represented by the formula D-R).sub.n wherein D is a nigrosine dye residue, R is C.sub.3 -C.sub.18 alkyl or alkenyl which may be straight or branched, or aralkyl or aralkenyl which may have a C.sub.1 -C.sub.8 alkyl substituent on the aryl moiety, the R in each case being the same as or different from the others, and n is a number of 1 to 4. The novel nigrosine dye is prepared by reacting a corresponding unsubstituted nigrosine dye with an alkyl halide, alkenyl halide, aralkyl halide, or aralkenyl halide, or with a mixture thereof, to form the substituted nigrosine dye. The novel dye has a high solubility in and compatability with organic solvents and/or resins and is oleophilic and stable and particularly useful for ink compositions and as a charge control agent for the toners of electrophotographic or electrostatic image developers.

REFERENCES:
patent: 3887560 (1975-06-01), Nagashima et al.
patent: 4056530 (1977-11-01), Maekawa
patent: 4359577 (1982-11-01), Granzow et al.
patent: 4376859 (1983-03-01), Maurer et al.
Pentel Co., Ltd., Chem. Ab., 99, 24222u (1982).
Color Index, 3rd edition, p. 4456.

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