Magnetic recording media having a binder comprising a sulfobetai

Details Magnetic recording media having a binder comprising a sulfobetai Magnetic recording media having a binder comprising a sulfobetai

1991-03-07

1995-03-28

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

252 6254, 4284259, 428694, 428900, 528 71, G11B 500

Patent

active

054015715

ABSTRACT:
The sulfobetaine-containing resin has much improved affinity for magnetic powders. Therefore, by using the same as a binder, it becomes possible to attain good dispersion of magnetic powders superfine in particle size and/or large in amount of magnetization.
The binder can be used advantageously in the manufacture of magnetic recording media, such as magnetic tapes and magnetic disks.

REFERENCES:
patent: 3411912 (1968-11-01), Dykstra
patent: 4152485 (1979-05-01), Mizumura et al.
patent: 4507458 (1985-03-01), Shiraki et al.
patent: 4533601 (1985-08-01), Hermann et al.
patent: 4556611 (1985-12-01), Nakajima
patent: 4578314 (1986-03-01), Ohta et al.
patent: 4734330 (1988-03-01), Oiyama et al.
patent: 4898922 (1990-02-01), Shiraki
"Polyurethannes a proprietes emulsifiantes et electrolytiques" Jean--Francois Gerard, Makromol Chem. 189, 1693-1717 Jul. 1988.

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