Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1986-03-11

1987-06-23

Robinson, Ellis P.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

252 6254, 427128, 4284259, 428522, 428524, 428532, 428694, 428695, 428900, G11B 571

Patent

active

046752501

ABSTRACT:
A magnetic recording medium having improved lubricity and durability properties which comprises a magnetic powder, a resin binder and an ester compound of the formula (1): ##STR1## in which R1 and R2 are each a straight or branched, saturated alkyl having 1 to 25 carbon atoms and R3 is an unsaturated hydrocarbon group or a straight or branched, saturated alkyl and has 7 to 27 carbon atoms, provided that the total carbon atom number of R1 and R2 ranges from 18 to 32 when R3 is the unsaturated hydrocarbon group and that ranges from 22 to 32 when R3 is the saturated alkyl. It is improved in lubricity and durability.

REFERENCES:
patent: 4172176 (1979-10-01), Tanaka
patent: 4247407 (1981-01-01), Waruse
patent: 4383000 (1983-05-01), Fujiki
patent: 4383001 (1983-05-01), Fujiki
patent: 4420540 (1983-12-01), Ogawa
patent: 4522885 (1985-06-01), Funahashi
patent: 4595640 (1986-06-01), Chernega

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