Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1996-07-19
1998-12-15
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106456, 106457, 106459, 106499, 252 6256, 252 6259, 428 694XS, C09C 122
Patent
active
058490744
ABSTRACT:
A method for making magnetic ink compositions is disclosed. The magnetic particles used in the ink are prepared from an aqueous slurry. A surface derivatizing agent is added to the slurry to render the magnetic pigment particles hydrophobic. The particles then sink to the bottom of the slurry, and the bulk water is then removed. After air drying, dry magnetic pigment particles are provided. The particles will be hydrophobic, and thus will have superior resistance to water as compared to previously known magnetic pigment particles. Magnetic ink compositions are formulated from the magnetic particles.
REFERENCES:
patent: 3348959 (1967-10-01), Csonka et al.
patent: 3398113 (1968-08-01), Godshalk et al.
patent: 3453130 (1969-07-01), Feld
patent: 4160760 (1979-07-01), Carr et al.
patent: 4277288 (1981-07-01), Lawrence et al.
patent: 4545821 (1985-10-01), Rau et al.
patent: 4913063 (1990-04-01), Jonas et al.
patent: 5420317 (1995-05-01), Laufenberg et al.
patent: 5501732 (1996-03-01), Neidenzu et al.
PCT Search Report, Dec. 10, 1996, (GB 96/02415).
Hawley's Condensed Chemical Dictionary, 11.sup.th ed. pp. 695 and 838, Van Nostrand, N.Y., 1987 (No Month).
Hyperdispersants, Schofield, J.D., Surface Coatings Institute (JOCCA), 74(6), pp. 204, 206-210, Jun. 1991.
A Model for Organic pigments in Oil or Water-Based Printing Inks, Hays, B.G., Am. Ink Maker, v. 64, pp., 13-21, Oct. 1986.
Bell Mark L.
Hertzog Scott L.
Videojet Systems International Inc.
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