公开(公告)号：JPS61261218A

公开(公告)日：1986-11-19

申请号：JP10507986

申请日：1986-05-09

Applicant: BASF AG

Inventor： STECK WERNER ,  FESER RAINER ,  LOESER WERNER ,  RUDOLF PETER ,  VAETH GUENTER ,  JAKUSCH HELMUT ,  KOVACS JENOE

IPC: C01G49/00 ,  C01G49/06 ,  C09D5/23 ,  G11B5/706 ,  H01F1/11

公开(公告)号：DE3516885A1

公开(公告)日：1986-11-13

申请号：DE3516885

申请日：1985-05-10

Applicant: BASF AG

Inventor： STECK WERNER ,  FESER RAINER ,  LOESER WERNER ,  RUDOLF PETER ,  VAETH GUENTER ,  JAKUSCH HELMUT ,  KOVACS JENOE

IPC: C01G49/00 ,  C01G49/06 ,  C09D5/23 ,  G11B5/706 ,  H01F1/11 ,  C01G49/02 ,  C01G51/00 ,  C08K3/22 ,  C09D7/12 ,  G11B5/84 ,  B05D5/12 ,  C04B35/26

Abstract: The preparation of acicular ferrimagnetic iron oxides which contain cobalt and phosphate ions and, if desired, further additives, and their use for manufacturing magnetic recording media.

公开(公告)号：IN143528B

公开(公告)日：1977-12-17

申请号：IN1899CA1976

申请日：1976-10-18

Applicant: BASF AG

Inventor： SPOOR H ,  JUNG H ,  ROSCHKE W ,  KOVACS JENOE ,  MARX M

IPC: H01B3/42 ,  C08G53/18

公开(公告)号：CA1155989A

公开(公告)日：1983-10-25

申请号：CA342092

申请日：1979-12-14

Applicant: BASF AG

Inventor： KOVACS JENOE

IPC: C08G18/67 ,  C08J3/07 ,  H01B3/30 ,  C09D3/72 ,  C08L75/04

Abstract: The invention relates to polyurethane coatings prepared from the reaction products of a polyester or polyether, a hydroxyl compound containing acetylenic unsaturation and an organic polyisocyanate.

公开(公告)号：DE3684038D1

公开(公告)日：1992-04-09

申请号：DE3684038

申请日：1986-05-03

Applicant: BASF AG

Inventor： STECK WERNER ,  FESER RAINER ,  LOESER WERNER ,  RUDOLF PETER ,  VAETH GUENTER ,  JAKUSCH HELMUT ,  KOVACS JENOE

IPC: C01G49/00 ,  C01G49/06 ,  C09D5/23 ,  G11B5/706 ,  H01F1/11

Abstract: In the prodn. of acicular Co-contg. ferromagnetic Fe oxide, (a) gamma-FeOOH seeds are produced by the acid process in a first stage from Fe(II) salt solns. by addn. of alkali and simultaneous oxidn. by introduction of air in the presence of 0.2-1.0wt.% phosphate ions w.r.t. the amt. of gamma-FeOOH end prod.; (b) these seeds are then grown to the gamma-FeOOH end prod. in a second stage at a pH of 4-5.5; and then (c) after filtering, washing and drying, this is dehydrated at 300-600 deq.C and reduced to magnetite in the presence of organic cpds. decomposing in the presence of Fe oxide, then oxidised to gamma-Fe2O3 with gas contg. O2; then (d) modified by pptn. of Fe(OH)2 and/or Co(OH)2 in alkaline suspension, filtration, drying and tempering under inert gas at 100-350 deg.C.