Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-10-20

1989-07-11

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428694, 428695, 428900, G11B 570

Patent

active

048471569

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer containing (a) ferromagnetic particles, (b) a binder containing at least one resin substituted with at least one polar group selected from an --SO.sub.3 M group, a --COOM group, an --OSO.sub.3 M group, an ##STR1## group and a ##STR2## group, wherein M represents H, Li, Na or K and M' represents H, Li, Na, K or an alkyl group, and (c) at least one fatty acid lubricating agent comprising at least one fatty acid derivative represented by formula (I): ##STR3## in which R represents a hydrocarbon group having from 11 to 21 carbon atoms, X represents hydrogen or a methyl group, R' represents a hydrocarbon group having from 1 to 8 carbon atoms and n is an integer of from 2 to 20.

REFERENCES:
patent: 4652500 (1987-03-01), Ejiri
patent: 4666784 (1987-05-01), Imukai
patent: 4690864 (1987-09-01), Funahashi
patent: 4701372 (1987-10-01), Akiyama

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