Composition for forming thick magnetic recording medium

Details Composition for forming thick magnetic recording medium Composition for forming thick magnetic recording medium

1983-07-28

1984-08-07

Demers, Arthur P.

Compositions

Magnetic

With wax, bitumen, resin, or gum

427128, 427132, 428 64, 428900, G11B 570, G11B 568, H01F 126

Patent

active

044642784

ABSTRACT:
A composition comprising 70% by weight or less of magnetic particles and 30% by weight or more of a resin mixture of (a) an epoxy resin, (b) a phenol resin and (c) polyvinyl butyral, the weight ratios of the resin components being (b)/(a)=2.5/7.5 to 4/6 and (c)/(a)+(b)=2.5/7.5 to 4/6, can give a thick magnetic recording medium excellent in film strength, resistance to cracks and durability by screen printing by one coating.

REFERENCES:
patent: 3781211 (1973-12-01), Lohoff
patent: 4302510 (1981-11-01), Umeki et al.
patent: 4307154 (1981-12-01), Hosaka
patent: 4329398 (1982-05-01), Hosaka et al.
patent: 4391864 (1983-07-01), Hosaka et al.
patent: 4396659 (1983-08-01), Shibata et al.
patent: 4397751 (1983-08-01), Dickstein et al.
patent: 4420531 (1983-12-01), Tokuda

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