Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1995-02-01
1997-03-25
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106 23R, 106493, 106494, 106497, 106498, 106504, C08K 500
Patent
active
056140142
ABSTRACT:
Pigments, mixed-crystal pigments or pigment preparations based on linear, unsubstituted or substituted quinacridones are prepared advantageously by initially wet-milling the coarsely crystalline crude pigments in a liquid aqueous, aqueous-organic or organic medium in a stirred ball mill which is operated at a power density of more than 2.5 kW per liter of milling space and a peripheral stirrer speed of more than 12 m/s under the action of grinding media having a diameter of less than or equal to 0.9 mm, until the desired degree of fine division is reached, and then isolating the resulting pigment in a conventional manner, or subjecting the resulting prepigment to solvent treatment at a temperature of from 50.degree. to 200.degree. C. and then isolating the pigment in a conventional manner.
REFERENCES:
patent: 2821529 (1958-01-01), Struve
patent: 2969366 (1961-01-01), Griswold et al.
patent: 3160510 (1964-12-01), Ehrich
patent: 3793327 (1974-02-01), Jaffe
patent: 3973981 (1976-08-01), Miyatake et al.
patent: 4256507 (1981-03-01), Kranz et al.
patent: 4310359 (1982-01-01), Ehashi et al.
patent: 4455173 (1984-06-01), Jaffe
patent: 4758665 (1988-07-01), Spietschka et al.
patent: 4895948 (1990-01-01), Jaffe et al.
patent: 4986852 (1991-01-01), Dietz et al.
patent: 5062577 (1991-11-01), Schmitt et al.
patent: 5074918 (1991-12-01), Babler
patent: 5207829 (1993-05-01), Schwab et al.
patent: 5296034 (1994-03-01), Dietz et al.
patent: 5318627 (1994-06-01), Dietz et al.
European Search Report No. 95100786.3 -Apr. 19, 1995.
Bell Mark L.
Hertzog Scott L.
Hoechst Aktiengesellschaft
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