Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1993-09-07
1994-06-07
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106493, 106494, 544 99, 546 28, C08K 5357
Patent
active
053186273
ABSTRACT:
In conventional dry milling of C.I. Pigment Violet 23, the environment is heavily polluted by the necessarily formed dusts, the resulting noise and vigorous vibration during the milling process.
According to the invention, it has now been found that these shortcomings can be avoided by carrying out the comminution of the base pigment by aqueous-alcoholic milling in the presence of beads and selected pigment dispersants derived from dioxazine compounds containing basic groups, followed by a solvent finish.
Such a combination of the two abovementioned treatment operations even makes it possible to increase the capacity without the need for any other expensive investments for constructional modifications of the equipment. The pigment preparations produced in this manner simultaneously result in an improvement of the colorant in the paint and especially in nitrocellulose gravure printing upon practical application, in particular in an improvement of the gloss and a reduction in abrasiveness, compared with commercial grades known in this area.
REFERENCES:
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patent: 4253839 (1981-03-01), Spietschka et al.
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patent: 4310359 (1982-01-01), Ehashi et al.
patent: 4986852 (1991-01-01), Dietz et al.
Patent Abstracts of Japan; vol. 6, No. 54 (C-97)(932) Apr. 9, 1982 & JP-A-56 167 762 (Toyo Ink Seizo) Dec. 23, 1981.
Patent Abstracts of Japan; vol. 13, No. 589 (C-670)(3937) Dec. 25, 1989 & JP-A-1 247 467 (Toyo Ink Mfg) Oct. 3, 1989.
Patent Abstracts of Japan; vol. 11, No. 96 (C-412)(2543) Mar. 26, 1987 & JP-A-61 246 261 (Toyo Ink Mfg) Nov. 1, 1986.
Patent Abstracts of Japan; vol. 13, No. 589 (C-670)(3937) Dec. 25, 1989 & JP-A-1 247 468 (Toyo Ink Mfg) Oct. 3, 1989.
Dietz Erwin
Urban Manfred
Bell Mark L.
Hertzog Scott L.
Hoechst Aktiengesellschaft
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