Quaternary ammonium salt of an alkoxysilane as a dispersant for

Details Quaternary ammonium salt of an alkoxysilane as a dispersant for Quaternary ammonium salt of an alkoxysilane as a dispersant for

1988-03-23

1990-05-29

Doll, John

Compositions

Magnetic

Iron-oxygen compound containing

C04B 3526

Patent

active

049293761

ABSTRACT:
There is disclosed the use of a quaternary ammonium salt of an alkoxysilane as a dispersant for magnetic pigment particles in the preparation of magnetic recording media. The dispersant of the present invention can bind to the pigment particles and may be substituted for conventional phosphate ester dispersants which are incapable of binding to the pigment and tend to migrate to the surface of such media, thereby adversely affecting recording media performance.

REFERENCES:
patent: 3471541 (1969-10-01), Morehouse
patent: 4076890 (1978-02-01), Yamada et al.
patent: 4271234 (1981-06-01), Schonafinger et al.
patent: 4590127 (1986-05-01), Hashimoto et al.
patent: 4597801 (1986-07-01), Stratta et al.
patent: 4732706 (1988-03-01), Borduz et al.
patent: 4740423 (1988-04-01), Kadokura et al.
patent: 4762568 (1988-08-01), Nakamura et al.
patent: 4772522 (1988-09-01), Kubota et al.

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