Magnetic recording medium comprising ferromagnetic powder and a

Details Magnetic recording medium comprising ferromagnetic powder and a Magnetic recording medium comprising ferromagnetic powder and a

1995-11-09

1997-12-30

Resan, Stevan A.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428694BU, 428694BL, 428900, G11B 5702

Patent

active

057028214

ABSTRACT:
In a binder for a magnetic recording medium for forming a magnetic layer with ferromagnetic powder dispersed therein being arranged on a non-magnetic support member, whereby said binder consists of a polyurethane resin, which is a reaction product of diol and organic diisocyanate as principal materials, said polyurethane resin contains a short-chain diol having cyclic structure by 17 to 40 weight %, and said polyurethane resin contains a long-chain diol comprising 1.0 to 5.0 mmol/g of ether group to total urethane resin by 10 to 50 weight %. According to a binder for a magnetic recording medium and a magnetic recording medium using said binder of the present invention, good dispersion property, high running durability and preservation property can be obtained.

REFERENCES:
patent: 4637959 (1987-01-01), Ninomiya et al.
patent: 5153071 (1992-10-01), Watanabe et al.

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