公开(公告)号：DE1929171A1

公开(公告)日：1971-01-07

申请号：DE1929171

申请日：1969-06-09

Applicant: BASF AG

Inventor： WERNER BALZ DR ,  ROLAND FALK DR ,  WERNER HARTMANN DR JOB ,  JOERG HARTMANN DR HANS ,  GEORG SCHNELL DR

IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/72 ,  G11B5/70

Abstract: 1306518 Magnetic composition BADISCHE ANILIN & SODA FABRIK AG 8 June 1970 [9 June 1969] 27563/70 Heading H1H A magnetic composition comprises a binder containing a magnetic pigment and from 2 to 16 parts by weight based of 100 parts by weight of the magnetic pigment of a mixture of (a) a non-magnetizable powder of an aluminium or magnesium silicate having layer structure and a plate hardness of less than 6, and (b) a non-magnetizable powder having cube-shaped to spherical particles of at least one oxide carbide or nitride of aluminium, boron, silicon or chromium, in amounts of 15 to 90% by weight of (a) and of 10 to 85% by weight of (b). One or more magnetic layers may be provided on a non-magnetic supports wherein at least one of the magnetic layers contains the above mixture. Examples disclose compositions of circular γ-iron (III) oxide with binders and (1) microtalc and fused alumina, (2) kaolinite and silicon dioxide, (3) microtalc and boron carbide, (4) as (2) and (5) kaolinite and silicon carbide, which are applied to polyethylene terephthalate film.