Patents by Inventor Herbert Motz
Herbert Motz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4464352Abstract: A process for the manufacture of acicular ferrimagnetic iron oxide by converting acicular iron(III) oxide hydroxide at from 300.degree. to 650.degree. C., by treatment with an organic compound which decomposes in this temperature range in the presence of iron oxide, the iron(III) oxide hydroxide used for the reaction being a lepidocrocite which has been heat-treated at from 300.degree. to 700.degree. C.Type: GrantFiled: December 10, 1982Date of Patent: August 7, 1984Assignee: BASF AktiengesellschaftInventors: Horst Autzen, Herbert Motz, Peter Rudolf, Wilhelm Sarnecki, Werner Steck, Guenter Vaeth
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Patent number: 4357378Abstract: 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.Type: GrantFiled: February 17, 1981Date of Patent: November 2, 1982Assignee: BASF AktiengesellschaftInventors: Guenter Vaeth, Rudolf Bachmann, Werner Senkpiel, Hans-Joerg Hartmann, Roland Falk, Herbert Motz
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Patent number: 4327139Abstract: A magnetic recording medium comprising a non-magnetic base and a magnetizable layer which is applied to at least one side thereof and comprises magnetic particles finely dispersed in a polymeric binder and additives, the surface of the magnetizable layer being provided with a coating of a perfluoropolyether oil mixture as a lubricant.Type: GrantFiled: August 15, 1979Date of Patent: April 27, 1982Assignee: BASF AktiengesellschaftInventors: Dieter Schaefer, Herbert Motz, Dieter Mayer, Paul Deigner, Joachim Hack, Roland Falk
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Patent number: 4320171Abstract: Magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment dispersed in a binder which contains at least 50 percent by weight of a special polyurethane elastomer, namely a thermoplastic polyurethane which is soluble in tetrahydrofuran, is free from isocyanate groups and has been manufactured from (A) 1 mole of a hydroxyl-containing polyester having a molecular weight of from 700 to 2,500, (B) from 0.3 to 3 moles of a linear aliphatic diol of 2 to 10 carbon atoms, (C) from 0.05 to 0.4 mole of a triol of 3 to 10 carbon atoms, and (D) from 1.35 to 4.7 moles of a diisocyanate of 6 to 30 carbon atoms, the amount of NCO groups being approximately equivalent to the amount of OH groups of the sum of components (A) to (C).Type: GrantFiled: May 19, 1980Date of Patent: March 16, 1982Assignee: BASF AktiengesellschaftInventors: Herbert Motz, August Lehner, Heinrich Hartmann, Rudolf Bachmann, Hans-Joerg Hartmann, Harald Frischmann, Roland Falk, Joachim Hack, Milan Velic, Helmut Kopke
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Patent number: 4275114Abstract: 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.degree. to 200.degree. 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.Type: GrantFiled: March 10, 1977Date of Patent: June 23, 1981Assignee: BASF AktiengesellschaftInventors: Eduard Schoenafinger, Herbert Motz, Manfred Ohlinger, Paul Deigner, Werner Grau
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Patent number: 4267203Abstract: A process for the manufacture of magnetic recording media by dispersing a mixture of particulate anisotropic magnetic material and additives in a solution of a polymeric binder in an organic solvent, compressing and then releasing the pressure on the dispersion, thereafter applying a layer of the dispersion to a non-magnetizable base, orienting the anisotropic magnetic material by means of a magnetic field, and drying the coating.Type: GrantFiled: October 18, 1979Date of Patent: May 12, 1981Assignee: BASF AktiengesellschaftInventors: Herbert Motz, Dieter Schaefer, Werner Huebner, Dieter Mayer
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Patent number: 4201149Abstract: The invention relates to an improved apparatus for the manufacture of magnetic discs carrying very thin magnetic layers, by applying a fluid dispersion of magnetic materials in a binder mixture to rigid base discs by the spin-coating process. Above the side of the base disc which is to be provided with the magnetic layer, there are arranged means which produce an aerodynamic boundary layer above the discs during rotation of the latter. This avoids the formation of surface irregularities and of coating streaks during production of the layer by spin-coating.Type: GrantFiled: September 27, 1978Date of Patent: May 6, 1980Assignee: BASF AktiengesellschaftInventors: Eberhard Koester, Paul Deigner, Roland Falk, Karl Uhl, Dieter Schaefer, Dieter Mayer, Herbert Motz, Peter Felleisen
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Patent number: 4180597Abstract: A process for the manufacture of a magnetic recording medium by producing a dispersion of a finely divided anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, applying a layer of the dispersion to a nonmagnetizable base material, then orienting the anisotropic magnetic material by means of a magnetic field, and drying the layer, wherein a compound of the formula (I) ##STR1## where R.sup.1 is straight-chain or branched akyl of 2 to 10 carbon atoms, cycloalkyl of 6 to 10 carbon atoms or aralkyl of 7 to 14 carbon atoms and R.sup.2 is hydrogen or one of the radicals given in the definition of R.sup.1, is added to the dispersion.Type: GrantFiled: September 8, 1978Date of Patent: December 25, 1979Assignee: BASF AktiengesellschaftInventors: Herbert Motz, Norbert Schneider, Hans-Joerg Hartmann, Reinhold Baur
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Patent number: 4152484Abstract: This invention relates to magnetic recording media comprising a non-magnetic base and a magnetic coating firmly bonded thereto, which coating consists essentially of a dispersion of a finely divided magnetic pigment in a polyurethane-containing mixture of binders. This binder mixture contains from 30 to 90% by weight of an elastomeric polyurethane which is virtually free from isocyanate groups and is soluble in a volatile organic solvent, and from 10 to 70% by weight of a vinyl chloride copolymer containing from 5 to 50% by weight of polymerized units of a monoester obtained from an aliphatic diol of from 2 to 4 carbon atoms and acrylic or methacrylic acid. Magnetic recording media having a magnetic coating containing this binder mixture are distinguished by advantageous mechanical and electrical properties, in particular by good abrasion resistance and improved packing density combined with better orientation of the magnetic particles.Type: GrantFiled: July 28, 1977Date of Patent: May 1, 1979Assignee: BASF AktiengesellschaftInventors: Rudolf Bachmann, Hans-Joerg Hartmann, Herbert Motz
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Patent number: 4133911Abstract: The invention relates to an improved process for the manufacture of magnetic discs carrying very thin magnetic layers, by applying a fluid dispersion of magnetic materials in a binder mixture to rigid base discs by the spin-coating process. Above the side of the base disc which is to be provided with the magnetic layer, there are arranged means which produce an aerodynamic boundary layer above the discs during rotation of the latter. This avoids the formation of surface irregularities and of coating streaks during production of the layer by spin-coating.Type: GrantFiled: December 16, 1975Date of Patent: January 9, 1979Assignee: BASF AktiengesellschaftInventors: Eberhard Koester, Paul Deigner, Roland Falk, Karl Uhl, Dieter Schaefer, Dieter Mayer, Herbert Motz, Peter Felleisen
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Patent number: 4074002Abstract: Magnetic recording media comprising a base and, applied thereto, at least one firmly adhering magnetic layer based on magnetic particles dispersed in a mixture of organic binders, wherein at least the uppermost magnetic layer additionally contains non-magnetic particles of precipitated silica having a primary particle diameter of from 0.02 to 0.1.mu., a secondary particle diameter of from 2 to 4.mu. and a pH of from 5 to 8.As a result of the incorporation of such a precipitated silica into the magnetic layer, the coefficient of friction between the latter and metals remains uniformly low even after prolonged use, and no stick-slip motion occurs.Type: GrantFiled: March 8, 1976Date of Patent: February 14, 1978Assignee: BASF AktiengesellschaftInventors: Joachim Hack, Dieter Schaefer, Herbert Motz
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Patent number: 4058646Abstract: 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 dispersed in a binder which contains at least 50 percent by weight of a special polyurethane elastomer.This polyurethane elastomer is a thermoplastic polyurethane which is soluble in tetrahydrofuran and free from isocyanate groups, and which has been manufactured from (A) 1 mole of one or more hydroxyl-containing polyesters and/or hydroxyl-containing polyethers of molecular weight from 600 to 4,000, (B) from 3.5 to 15 moles of a branched-chain aliphatic diol of 4 to 10 carbon atoms or a mixture of aliphatic diols of 2 to 10 carbon atoms, of which at least 50 mole percent is a branched-chain aliphatic diol of 4 to 10 carbon atoms, (C) from 0 to 1 mole, but not more than 15 mole percent of the aliphatic diols according to B, of an aliphatic polyol with from 3 to 6 OH groups and 3 to 18 carbon atoms, and (D) from 4.Type: GrantFiled: September 2, 1975Date of Patent: November 15, 1977Assignee: BASF AktiengesellschaftInventors: Guenter Vaeth, Rudolf Bachmann, Heinrich Hartmann, Hans-Joerg Hartmann, Herbert Spoor, Karl Uhl, August Lehner, Winfried Gutermann, Herbert Motz
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Patent number: 4048375Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on finely divided magnetic pigment dispersed in organic binders, which coating contains, according to the invention, salts of long-chain basic polyaminoamides with high molecular weight organic acid esters.Such magnetic recording media exhibit improved mechanical resistance and improved adhesion of the coating to the base, coupled with advantageous electromagnetic properties.Type: GrantFiled: July 26, 1976Date of Patent: September 13, 1977Assignee: BASF AktiengesellschaftInventors: Gustav Loewenberg, Hans-Joerg Hartmann, Dieter Schaefer, Herbert Motz, Helmut Jakusch
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Patent number: 4046932Abstract: The invention relates to a process for the manufacture of improved magnetic discs by applying a thin layer of a liquid dispersion of magnetic pigments and optionally further, non-magnetic, pigments in a binder mixture to a non-magnetic rigid base, and curing the magnetic coating which has been applied. The binder used is a mixture of polycondensates comprising 60 to 70% by weight of a solid curable polycondensate of 2,2-bis(4-hydroxyphenyl)-propane and epichlorohydrin having an epoxy equivalent weight from about 400 to 2,500 and a melting point from about 50.degree. to 150.degree. C, 10 to 30% by weight of a curable allyloxybenzene-formaldehyde condensate of the resol type with free methylol groups or with methylol groups etherified with a lower alcohol, and having a molecular weight of less than 1,000, and 10 to 30% by weight of a curable melamine-formaldehyde condensate with more than two methylol groups etherified with n-butanol or iso-butanol, and having a molecular weight of less than 2,500.Type: GrantFiled: February 9, 1976Date of Patent: September 6, 1977Assignee: BASF AktiengesellschaftInventors: Hans-Joerg Hartmann, Roland Falk, Peter Gawlik, Werner Balz, Karl Uhl, Dieter Schaefer, Herbert Motz
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Patent number: 4018968Abstract: 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 ##STR1## 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.Type: GrantFiled: September 19, 1974Date of Patent: April 19, 1977Assignee: BASF AktiengesellschaftInventors: Ute Neumann, Hermann Roller, Job-Werner Hartmann, Joachim Hack, Herbert Motz, Werner Ostertag
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Patent number: 4018967Abstract: Magnetic recording tape especially suitable for use as video tape and computer tape, comprising a base carrying a magnetic coating which consists essentially of a dispersion of a finely divided magnetic pigment and at least one lubricant in an organic binder. The lubricant is a compound of the formula ##STR1## IN WHICH N IS AN INTEGER OF FROM 3 TO 8 AND R.sup.1 and R.sup.2 are an alkoxy or aralkoxy radical or conjointly are an alkyldioxy radical of 3 to 18 carbon atoms. A magnetic recording tape prepared with a high proportion of such a lubricant is distinguished by high abrasion resistance coupled with a minimum transfer of material to the magnetic heads even under fluctuating climatic conditions.Type: GrantFiled: September 19, 1974Date of Patent: April 19, 1977Assignee: BASF AktiengesellschaftInventors: Hermann Roller, Werner Senkpiel, Gerd Wunsch, Job-Werner Hartmann, Friedrich Fuchs, Joachim Hack, Volker Kiener, Herbert Motz, Werner Ostertag
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Patent number: 4005242Abstract: A magnetic recording medium consists of a non-magnetic base, on which the magnetic coating is a layer of a dispersion, containing a lubricant, of a magnetic pigment in a polymeric binder. The lubricant is a block copolymer which contains siloxane units and alkyleneoxy units of 2 to 4 carbon atoms, the alkyleneoxy units being bonded to the polysiloxane radical through a Si--O--C or Si--C group. The use of this lubricant gives a magnetic recording medium which has the advantages of good fluid lubrication and an excellent coefficient of friction which does not vary with time.Type: GrantFiled: December 23, 1974Date of Patent: January 25, 1977Assignee: BASF AktiengesellschaftInventors: Helmut Kopke, Hans-Joerg Hartmann, Dieter Mayer, Herbert Motz
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Patent number: 4001463Abstract: A process and apparatus for the manufacture of magnetic discs in which the preferred direction of particle orientation is parallel to the plane of the disc and tangential to its circumference. The base discs coated with the still fluid magnetic dispersion, are introduced into a zone of magnetic flux bounded by conductors, the conducting boundary being so arranged that the current flow on one side of the base disc runs radially outwards and on the other side runs radially inwards.Type: GrantFiled: July 21, 1975Date of Patent: January 4, 1977Assignee: BASF AktiengesellschaftInventors: Dieter Schaefer, Herbert Motz
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Patent number: 3995089Abstract: A magnetic recording medium in the form of a card having a non-magnetic support with a magnetic coating on one side of the support and a backcoating on the opposite side of the support, which backcoating exhibits improved scratch resistance and adherence to the support and improved frictional characteristics and consists essentially of 20 to 50% by weight of a binder mixture containing 10 to 60% by weight of an elastomeric polyurethane and, incorporated in the binder mixture, a non-magnetic pulverulent mixture of 10 to 40% by weight of conductive carbon powder and 60 to 90% by weight of platelet-shaped and spherical particles.Type: GrantFiled: April 2, 1975Date of Patent: November 30, 1976Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventors: Job Werner Hartmann, Hans-Joerg Hartmann, Dieter Mayer, Peter Felleisen, Ursula Klein, Herbert Motz