公开(公告)号：DE4425873A1

公开(公告)日：1996-01-25

申请号：DE4425873

申请日：1994-07-21

Applicant: BASF MAGNETICS GMBH

Inventor： AUWETER HELMUT DR ,  LOESER WERNER DR ,  PFANNEBECKER EMIL ,  SCHNEIDER NORBERT ,  JAKUSCH HELMUT DR ,  WIETHOELTER DIETER DIPL ING

IPC: C09D5/23 ,  G11B5/70 ,  G11B5/706 ,  G11B5/84 ,  G11B5/68

Abstract: The process concerns the prodn. of a magnetic recording medium, which has a non-magnetic substrate and coating(s) of magnetic dispersion comprising a mixt. of finely-divided magnetisable pigments which differ in morphology and/or particle size, finely dispersed in a polymeric binder matrix and opt. other additives. The novelty is that the mixed and/or co-compacted pigments are added to the dispersion and the pigment mixt. contains (a) 60-95 wt.% acicular pigment(s) (I) with a BET value of 15-45 m /g and (b) 5-40 wt.% acicular pigment(s) (II) with a BET value at least 5 m /g higher than that of (I).