Magnetic recording media

Details Magnetic recording media Magnetic recording media

1992-12-18

1996-08-06

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of polyamidoester

4284259, 428694B, 428694BU, 428694BY, 428694BL, 428900, 252 6254, G11B 566, B32B 2700

Patent

active

055432263

ABSTRACT:
Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer bonded thereon and based on a magnetic material dispersed in at least one polyurethane and one polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate being obtained by reacting a hydroxyl-containing poly(meth)acrylate with a mixture of di- and polyisocyanates and converting the remaining NCO groups with ammonia or primary or secondary amines into urea groups.

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patent: 4152485 (1979-05-01), Mizumura et al.
patent: 4477531 (1984-10-01), Kohler et al.
patent: 4559118 (1985-12-01), Heil
patent: 4666781 (1987-05-01), Lehner
patent: 4786657 (1988-11-01), Hammar et al.
patent: 5130202 (1992-07-01), Keppeler et al.
patent: 5330784 (1994-07-01), Bobrich
H. Fikentscher, "Cellulose Chemie" 13 (1932) pp. 58-64.

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