Magnetic recording medium and production thereof

Details Magnetic recording medium and production thereof Magnetic recording medium and production thereof

1982-03-29

1983-12-06

Pianalto, Bernard D.

Stock material or miscellaneous articles

Composite

Of polyisocyanurate

242 1, 427 44, 427128, 427177, 428694, 428900, B32B 2700

Patent

active

044194064

ABSTRACT:
A magnetic recording medium having a magnetic layer on one surface of a substrate and a back layer on the other surface, which is characterized by that the back layer is that formed by dispering a filler such as carbon black, graphite, SiO.sub.2, TiO.sub.2, Al.sub.2 O.sub.3,Cr.sub.2 O.sub.3, SiC, CeO.sub.2, CaCO.sub.3, zinc oxide, geothite, .alpha.Fe.sub.2 O.sub.3, talc, kaolin, CaSO.sub.4, boron nitride, Teflon powder, graphite fluoride, molybdenum disulfide, zirconia etc. In a binder containing a radiation sensitive curable resin such as acryl-modified vinyl chloride - vinyl acetate - vinyl alcohol copolymer, acryl-modified polyurethane elastomer, acryl-modified polyester resin, etc. and curing it prior to rolling. The obtained back layer is very tough and can reduce the number of dropouts.

REFERENCES:
patent: 3293066 (1966-12-01), Haines
patent: 4310599 (1982-01-01), Akashi et al.
patent: 4335183 (1982-06-01), Hosaka
patent: 4339566 (1982-07-01), Rosenkranz et al.

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