Magnetic coating dispersion

Details Magnetic coating dispersion Magnetic coating dispersion

1996-07-29

1997-08-26

Resan, Stevan A.

Compositions

Magnetic

With wax, bitumen, resin, or gum

427128, 428694BA, 428900, G11B 5712

Patent

active

056607601

ABSTRACT:
In the preparation of dispersions of magnetic pigments, it was found that excellent dispersion stability is achieved when compounds which are selected from the group consisting of quaternary ammonium compounds, guanidines, piperidines, alkylated or ethoxylated amines, diamines, polyamines or mixtures thereof, ethanolic KOH solutions, metal alkoxylates, Grignard compounds and certain metal hydrides are used as codispersants. The compounds are added in an amount of 0.15-4% by weight, based on the magnetic pigment.

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patent: 5158830 (1992-10-01), Yasuda et al.
patent: 5246810 (1993-09-01), Hagiwara et al.
patent: 5415929 (1995-05-01), Vass et al.

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