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Patent Agency Ranking
公开(公告)号：CA1027812A
公开(公告)日：1978-03-14
申请号：CA198814
申请日：1974-05-03
Applicant: BASF AG
Inventor： BALZ WERNER K , HARTMANN HANS-JOERG , FALK ROLAND , GAWLIK PETER , UHL KARL , SCHAEFER DIETER , MOTZ HERBERT
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公开(公告)号：CA1010309A
公开(公告)日：1977-05-17
申请号：CA185731
申请日：1973-11-14
Applicant: BASF AG
Inventor： BACHMANN RUDOLF , HARTMANN HANS-JOERG , MOTZ HERBERT
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公开(公告)号：CA1026168A
公开(公告)日：1978-02-14
申请号：CA197229
申请日：1974-04-09
Applicant: BASF AG
Inventor： VAETH GUENTER , BACHMANN RUDOLF , SENKPIEL WERNER , HARTMANN HANS-JOERG , FALK ROLAND , MOTZ HERBERT
Abstract: The invention relates to magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment and a special binder mixture. This binder mixture consists essentially of 20 to 90 percent by weight of an elastomeric polyurethane which is soluble in a volatile organic solvent, is practically free of isocyanate groups and has been obtained from a linear, aliphatic polyester or polyether and a diisocyanate of 6 to 24 carbon atoms, and of 10 to 80 percent by weight of a vinyl chloride copolymer which contains 50 to 90 percent by weight of vinyl chloride units and 10 to 50 percent by weight of units of one or more diesters of maleic acid with an alcohol of 1 to 3 carbon atoms, or of the reaction product of this binder mixture with a polyisocyanate of 6 to 50 carbon atoms. Magnetic coatings containing such a binder mixture are distinguished by improved surface hardness coupled with improved orientability of the magnetic particles, as a result of which such recording media are particularly suitable for modern video- and audio-recording instruments.
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公开(公告)号：CA1028208A
公开(公告)日：1978-03-21
申请号：CA209635
申请日：1974-09-18
Applicant: BASF AG
Inventor： NEUMANN UTE , ROLLER HERMANN , HARTMANN JOB-WERNER , HACK JOACHIM , MOTZ HERBERT , OSTERTAG WERNER
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.
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公开(公告)号：CS180630B2
公开(公告)日：1978-01-31
申请号：CS261974
申请日：1974-04-11
Applicant: BASF AG
Inventor： VAETH GUENTER , BACHMANN RUDOLF , SENKPIEL WERNER , HARTMANN HANS-JOERG , FALK ROLAND , MOTZ HERBERT
Abstract: The invention relates to magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment and a special binder mixture. This binder mixture consists essentially of 20 to 90 percent by weight of an elastomeric polyurethane which is soluble in a volatile organic solvent, is practically free of isocyanate groups and has been obtained from a linear, aliphatic polyester or polyether and a diisocyanate of 6 to 24 carbon atoms, and of 10 to 80 percent by weight of a vinyl chloride copolymer which contains 50 to 90 percent by weight of vinyl chloride units and 10 to 50 percent by weight of units of one or more diesters of maleic acid with an alcohol of 1 to 3 carbon atoms, or of the reaction product of this binder mixture with a polyisocyanate of 6 to 50 carbon atoms. Magnetic coatings containing such a binder mixture are distinguished by improved surface hardness coupled with improved orientability of the magnetic particles, as a result of which such recording media are particularly suitable for modern video- and audio-recording instruments.
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