Schichtmagnetogrammtraeger

摘要

1312287 Magnetic recording media BADISCHE ANILIN- & SODA-FABRIK AG 11 Sept 1970 [13 Sept 1969] 43524/70 Heading H1H Magnetic recording media comprises a non- magnetizable support and a firmly adherent layer based on a particulate magnetic pigment dispersed in a binder and including from 2 to 10% by weight, based on the dry weight of the magnetic layer, of a lubricant consisting of a mixture of predominantly branched fatty acids containing at least 95% by weight of fatty acids having twelve to eighteen carbon atoms and at least 40% by weight of branched fatty acids having eighteen carbon atoms, which mixture is liquid at room temperature. Specified magnetic pigments are rod shaped and cubeshaped γ-Fe 2 O 3 , particulate alloys of iron, cobalt and/or nickel and ferromagnetic chromium dioxide. Specified binders are copolyamides, polyurethanes, polyvinyl chloride and vinyl chloride copolymers. Other fillers or pigments, e.g. carbon black, graphite, quartz powder and/or non-magnetizable powder based on silicates may be added. The support may be of polyvinyl chloride or polyethylene terephthalate film and a layer of a vinylidene chloride copolymer may be applied to the support prior to the application of the magnetic layer.