Magnetic recording medium using a fatty acid ester lubricant whe

Details Magnetic recording medium using a fatty acid ester lubricant whe Magnetic recording medium using a fatty acid ester lubricant whe

1988-04-20

1991-07-09

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Composite

Of inorganic material

428695, 252 56R, G11B 2300

Patent

active

050305212

ABSTRACT:
A magnetic recording medium comprises a nonmagnetic support and a magnetic recording layer containing a ferromagnetic powder which is provided on the support. The magnetic recording layer contains a binder resin having a acid residue or a salt thereof and a fatty acid ester compound having the formula (I): ##STR1## wherein R is a hydrocarbon group having 11-21 carbon atoms, R.sup.1 is hydrogen atom or a hydrocarbon group having 1-3 carbon atoms, and R.sup.2 and R.sup.3 are the same or different and each is a hydrocarbon group having 1-8 carbon atoms. The total number of carbon atoms contained in R.sup.1, R.sup.2 and R.sup.3 being not less than 3 carbon atoms. Alternatively, the fatty acid ester can be coated on the magnetic layer.

REFERENCES:
patent: 3809652 (1974-05-01), Brennan
patent: 4420540 (1983-12-01), Ogawa et al.
patent: 4675250 (1987-06-01), Kanai et al.
patent: 4701372 (1987-10-01), Akiyama et al.
patent: 4731292 (1988-03-01), Sasaki et al.
patent: 4748090 (1988-05-01), Yamamoto et al.
patent: 4786551 (1988-11-01), Ootani et al.

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