Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1996-07-03
1998-09-01
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106410, 106411, 106413, 106493, 106494, 106495, 106496, 106497, 106498, 540141, 540144, 546 49, 546 50, C09B 6750
Patent
active
058006079
ABSTRACT:
Process for the preparation of pigment preparations, which comprises wet milling the crude pigments which are present in coarsely crystalline state, or prepigments or pigments which are present in a form in which they are difficult to disperse, in a concentration of from 20 to 60% by weight based on the total weight of the pigment preparation, in a flocculation-stable liquid medium and in a stirred ball mill which is operated with a peripheral stirrer speed of more than 12 m/s, under the action of nonmetallic grinding media with a diameter of less than or equal to 1.0 mm, until the desired degree of fine division is reached, and then isolating the pigment preparation.
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Bohmer Martin
Schnaitmann Dieter
Urban Manfred
Bell Mark L.
Hertzog Scott L.
Hoechst Aktiengesellschaft
Jackson Susan S.
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