Magnetic recording medium containing lubricants

Details Magnetic recording medium containing lubricants Magnetic recording medium containing lubricants

1974-12-23

1977-01-25

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 427127, 428539, 428447, 428900, C08G 7742, H01F 126

Patent

active

040052427

ABSTRACT:
A magnetic recording medium consists of a non-magnetic base, on which the magnetic coating is a layer of a dispersion, containing a lubricant, of a magnetic pigment in a polymeric binder. The lubricant is a block copolymer which contains siloxane units and alkyleneoxy units of 2 to 4 carbon atoms, the alkyleneoxy units being bonded to the polysiloxane radical through a Si--O--C or Si--C group. The use of this lubricant gives a magnetic recording medium which has the advantages of good fluid lubrication and an excellent coefficient of friction which does not vary with time.

REFERENCES:
patent: 2654681 (1953-10-01), Lueck
patent: 3404997 (1968-10-01), Jacobson
patent: 3411944 (1968-11-01), Higashi
patent: 3437510 (1969-04-01), Diaz
patent: 3457173 (1969-07-01), Pater
patent: 3480583 (1969-11-01), Bailey et al.
patent: 3629310 (1971-12-01), Bailey et al.

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