公开(公告)号：DE2350062A1

公开(公告)日：1975-04-17

申请号：DE2350062

申请日：1973-10-05

Applicant: BASF AG

Inventor： ROLLER HERMANN ,  SENKPIEL WERNER DIPL-CHEM DR ,  WUNSCH GERD DIPL-CHEM DR ,  HARTMANN JOB-WERNER DIPL-CHEM ,  FUCHS FRIEDRICH DIPL-CHEM DR ,  HACK JOACHIM DIPL-ING ,  KIENER VOLKER DIPL-CHEM DR ,  MOTZ HERBERT DIPL-ING DR ,  OSTERTAG WERNER DIPL-CHEM DR

IPC: G11B5/72 ,  C07F9/6581 ,  C07F9/6593 ,  C08K5/5399 ,  C09D5/23 ,  C09D7/12 ,  G11B5/71 ,  G11B5/725

公开(公告)号：DE2352983A1

公开(公告)日：1975-04-30

申请号：DE2352983

申请日：1973-10-23

Applicant: BASF AG

Inventor： ROLLER HERMANN ,  HARTMANN JOB-WERNER DIPL-CHEM ,  HACK JOACHIM DIPL-ING ,  OSTERTAG WERNER DIPL-CHEM DR

IPC: C09D5/23 ,  G11B5/702 ,  G11B5/68

Abstract: Magnetic layer for laminated magnetograms consists of a dispersion of a finely divided magnetic pigment in a mixt of (I) 35-55 wt. % polyurethane elastomer that is soluble in a volatile org. solvent, is practically free of isocyanate gps, and has a Shore A hardness of 70-80, (II) 35-55 wt. % polyurethane elastomer that is soluble in a volatile org. solvent is practically free of isocyanate gps, and has a Shore A hardness of 90-100, and (III) 0-35 wt. % additional polymerix binder. Good resistance to magnetic heads is obtd with very slight abrasion of magnetic heads. Gives magnetic layers with good magneto-electric properties. I and II are pref. prepd from aliphatic polyester polyols aromatic diisocyanates and opt. 2-8C aliphatic diols. III is pref. a polyepoxide resin prepd. from 2,2-bis-(4-hydroxyphenyl)-propane and epichlorohydrin.

公开(公告)号：DE2350063A1

公开(公告)日：1975-04-17

申请号：DE2350063

申请日：1973-10-05

Applicant: BASF AG

Inventor： NEUMANN UTE ,  ROLLER HERMANN ,  HARTMANN JOB-WERNER DIPL-CHEM ,  HACK JOACHIM DIPL-ING ,  MOTZ HERBERT DIPL-ING DR ,  OSTERTAG WERNER DIPL-CHEM DR

IPC: C07F9/09 ,  C08K5/521 ,  C09D5/23 ,  C09D7/12 ,  G11B5/71 ,  G11B5/72 ,  G11B5/725

Abstract: Coated magnetic recording media, especially video tapes and computer tapes, comprising a non-magnetic base carrying a magnetic coating which consists of a dispersion, essentially containing a finely divided magnetic pigment in an organic binder and at least one lubricant. A compound of the formula in which n is an integer of from 1 to 3 and R is alkyl, alkoxyalkyl or aralkyl, each of 3 to 18 carbon atoms, is used as a lubricant. The products have high abrasion resistance coupled with only little transfer of material to the magnetic heads even under fluctuating climatic conditions.

公开(公告)号：DE2344196A1

公开(公告)日：1975-03-13

申请号：DE2344196

申请日：1973-09-01

Applicant: BASF AG

Inventor： LUDWIG DIPL-CHEM DR EBENHOECH ,  WERNER DIETMAR DIPL-CHEM DR ,  BOCK GUSTAV DIPL-CHEM DR ,  WUNSCH GERD DIPL-CHEM DR ,  OPP KARL DIPL-CHEM DR ,  OSTERTAG WERNER DIPL-CHEM DR

IPC: C01G49/00 ,  C01G49/02 ,  C09C1/00 ,  C09C1/22 ,  C09C1/24

Abstract: A transparent iron oxide pigment which is X-ray amosphous, and has the formula C0.01-0.05. Fe2O2.960-2.999. The new pigment can be used for the manufacture of metallic-effect surface coatings.