Indanthrene dyes

Details Indanthrene dyes Indanthrene dyes

1975-06-16

1978-02-28

Phillips, Delbert R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8 34, 8 40, C09B 548

Patent

active

040767132

ABSTRACT:
A process for the preparation of a vat dye of the dianthraquinone-azine or dianthraquinone-N,N'-dihydroazine series, or a higher cyclic homologue thereof, which comprises reacting a primary amine selected from the group consisting of amino anthraquinones, their substitution products and higher cyclic homologues, with an alkaline condensing agent, wherein reaction is effected in the presence of at least one oxide of an organic derivative of a metalloid element of Group 5B of the Periodic Classification of the elements.

REFERENCES:
patent: 1975248 (1934-10-01), Bishop et al.
patent: 2693469 (1954-11-01), Thielert et al.
patent: 2764586 (1956-09-01), Thielert et al.

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