Copolymer binder for a magnetic recording medium

Details Copolymer binder for a magnetic recording medium Copolymer binder for a magnetic recording medium

1983-04-18

1986-02-04

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 360134, 360135, 360136, 427128, 428522, 428694, 428900, G11B 570

Patent

active

045686130

ABSTRACT:
A magnetic recording medium is disclosed which is comprised of a support base having positioned thereon a magnetic layer having a ferromagnetic powder dispersed in a binder composition. The binder composition is comprised of a vinyl chloride-vinyl alcohol copolymer in an amount of 40 wt % to about 95 wt %. The copolymer contains 1 wt % to less than 8 wt % of vinyl alcohol component and 0 to 2 wt % of vinyl acetate component. By using the binder composition which includes the copolymer the resulting magnetic recording medium have excellent surface smoothness, good dispersion of ferromagnetic powder, excellent electromagnetic properties, as well as excellent running property and durability.

REFERENCES:
patent: 3728262 (1973-04-01), Lemmer
patent: 4234438 (1980-11-01), Horigome
patent: 4352859 (1982-10-01), Yoda
patent: 4388376 (1983-06-01), Kubota
patent: 4409299 (1983-10-01), Mizuno
patent: 4429010 (1984-01-01), Shibata

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