Pigment preparations based on dioxazine compounds

Details Pigment preparations based on dioxazine compounds Pigment preparations based on dioxazine compounds

1992-03-20

1994-01-04

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106 22H, 106 23H, 106493, 106494, 544 64, 544 73, 544 74, 544 99, C07D49822, C07D26538, C09D 1102

Patent

active

052756530

ABSTRACT:
In order to improve the application properties, in particular the rheological and coloristic properties, and the gloss behavior and the flocculation stability of dioxazine pigments in acrylic varnishes, the surface of the base pigment is modified by coating with sulfo-containing dioxazine derivatives, which in most cases have been converted into the corresponding metal salts, into specific salt-like derivatives derived therefrom or, if desired, into cyclic ammonium compounds. Such a modification of the base pigment, i.e. production of the pigment preparations according to the invention by adding the specific dispersant, can take place at the stage of the pigment synthesis, during a comminution process of the coarse-crystalline crude pigment, by addition to the already finely divided crude pigment in the course of a subsequent solvent finish treatment or by mechanical mixing of the two essential components, pigment and dispersant.

REFERENCES:
patent: 4310359 (1982-01-01), Ehashi et al.
patent: 4317682 (1982-03-01), Katsura et al.
patent: 4668774 (1987-05-01), Loeffler et al.
patent: 4986852 (1991-01-01), Dietz et al.
Complete English translation of laid-open Japanese Patent Application Kokai No. 102272/1990. Apr. 13, 1990.
Complete English translation of laid-open Japanese Patent Application Kokai No. 102273/1990. Apr. 13, 1990.

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