Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-11-06

1988-06-21

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 427128, 428522, 428694, 428900, G11B 5702

Patent

active

047525304

ABSTRACT:
A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer including ferromagnetic powder and a binder comprising a polyurethane resin having a metal salt group of sulfonic acid and vinyl chloride/vinyl acetate-based copolymer containing from 0.2 wt. % to less than 1.5 wt. % of maleic acid. The magentic recording medium has reduced deterioration of the video S/N ratio under high temperature and high humidity.

REFERENCES:
patent: 4152485 (1979-05-01), Mizumura
patent: 4352859 (1982-10-01), Yoda
patent: 4400435 (1983-08-01), Yoda
patent: 4404253 (1983-09-01), Kohler
patent: 4411957 (1983-10-01), Tokuda
patent: 4420531 (1983-12-01), Tokuda
patent: 4431712 (1984-02-01), Matsufuji
patent: 4492734 (1985-01-01), Ogawa
patent: 4503120 (1985-03-01), Yamauchi
patent: 4521486 (1985-06-01), Ninomiya
patent: 4529661 (1985-07-01), Ninomiya
patent: 4560617 (1985-12-01), Nishimatsu
patent: 4571364 (1986-02-01), Kasuga
patent: 4613545 (1986-09-01), Chubachi

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