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公开(公告)号:JPS545704A
公开(公告)日:1979-01-17
申请号:JP6733678
申请日:1978-06-06
Applicant: BASF AG
Inventor: FURITSUTSU HAMON , MANFUREETO OORINGERU , YOOBUUUERUNERU HARUTOMAN
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公开(公告)号:JPS5348013A
公开(公告)日:1978-05-01
申请号:JP12100877
申请日:1977-10-11
Applicant: BASF AG
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公开(公告)号:JPS6140602B2
公开(公告)日:1986-09-10
申请号:JP9469578
申请日:1978-08-04
Applicant: BASF AG
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公开(公告)号:JPS53100197A
公开(公告)日:1978-09-01
申请号:JP1303178
申请日:1978-02-09
Applicant: BASF AG
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公开(公告)号:JPS5330497A
公开(公告)日:1978-03-22
申请号:JP10275477
申请日:1977-08-29
Applicant: BASF AG
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公开(公告)号:JPS6031769B2
公开(公告)日:1985-07-24
申请号:JP13252176
申请日:1976-11-05
Applicant: BASF AG
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公开(公告)号:JPS5428299A
公开(公告)日:1979-03-02
申请号:JP9469578
申请日:1978-08-04
Applicant: BASF AG
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公开(公告)号:JPS52130306A
公开(公告)日:1977-11-01
申请号:JP4418377
申请日:1977-04-19
Applicant: BASF AG
Inventor: EZUARUTO SHIENAFUINGERU , HERUBERUTO MOTSUTSU , MANFUREETO OORINGERU , PAURU DAIGUNERU , UERUNERU GUURA
Abstract: Chromium dioxide magnetic pigments are stabilized against loss of their magnetic properties by treating them, in aqueous and/or alcoholic suspension, with a block copolymer consisting of siloxane units and alkyleneoxy units of 2 to 4 carbon atoms, the alkyleneoxy units being bonded to the polysiloxane radical by a Si-O-C or Si-C group, in an amount of from 1 to 40% by weight based on the chromium dioxide, after which the latter is separated off and dried at from 50 DEG to 200 DEG C. The stabilized chromium dioxide magnetic pigments may be used for the manufacture of magnetic recording media exhibiting improved stability of the magnetic properties under adverse climatic conditions.
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公开(公告)号:JPS5273002A
公开(公告)日:1977-06-18
申请号:JP14791076
申请日:1976-12-10
Applicant: BASF AG
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公开(公告)号:JPS6120604B2
公开(公告)日:1986-05-23
申请号:JP12100877
申请日:1977-10-11
Applicant: Basf Ag
Inventor: UERUNERU SHUTETSUKU , HANSU HENINGU SHUNEEHAAGE , KURISUTOFU IETSUKU , UERUNERU HYUUPUNERU , MANFUREETO OORINGERU , UERUNERU REEZERU
CPC classification number: C22C33/0235 , B22F1/0088 , B22F9/22 , H01F1/061 , H01F1/065 , Y10S428/90
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