Patents by Inventor Walter Mächtle
Walter Mächtle 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: 7176255Abstract: The present invention relates to a process for preparing dye-comprising aqueous polymer dispersions by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of free-radical initiators, in which at least some of the monomers are employed in the form of an oil-in-water emulsion E1 whose disperse phase comprises at least one oil-soluble dye, wherein the disperse phase of E1 is formed essentially of dye-comprising monomer droplets having a diameter<500 nm. The present invention relates in addition to dye-comprising formulations which comprise the dye-comprising polymers of the invention and to pigmented formulations which comprise a polymer of the invention comprising optical brightener.Type: GrantFiled: July 30, 2003Date of Patent: February 13, 2007Assignee: BASF AktiengesellschaftInventors: Klemens Mathauer, Arno Boehm, Walter Maechtle, Peter Rossmanith, Sabine Kielhorn-Bayer, Klaus Muellen, Ulrike Rohr, Friedrich-Wilhelm Raulfs, Ulrike Schloesser, Wolfgang Schrof, Harutyun Hanciogullari, Karl Siemensmeyer, Paul Delavier, Ruediger Sens, Torsten Freund, Takahiro Ikeda, Takanori Wakebe
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Patent number: 6924035Abstract: Described is a process for preparing polymer-enrobed pigment particles, which comprises mixing in the presence of finely dispersed pigment particles a solution of a polymer in a first solvent with a second solvent in which the polymer is substantially insoluble. The pigment particle can be specifically modified by judicious selection of the polymer.Type: GrantFiled: September 25, 2001Date of Patent: August 2, 2005Assignee: BASF AktiengesellschaftInventors: Helmut Auweter, Heribert Bohn, Walter Mächtle, Manfred Mielke, Rüdiger Sens, Karl Siemensmeyer
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Patent number: 6727318Abstract: The present invention relates to a process for preparing dye-comprising aqueous polymer dispersions by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of free-radical initiators, in which at least some of the monomers are employed in the form of an oil-in-water emulsion E1 whose disperse phase comprises at least one oil-soluble dye, wherein the disperse phase of E1 is formed essentially of dye-comprising monomer droplets having a diameter <500 nm. The present invention also relates to perylene dyes of the formula III as set forth in claim 35. The present invention relates in addition to dye-comprising formulations which comprise the dye-comprising polymers of the invention and to pigmented formulations which comprise a polymer of the invention comprising optical brightener.Type: GrantFiled: August 9, 2000Date of Patent: April 27, 2004Assignee: BASF AktiengesellschaftInventors: Klemens Mathauer, Arno Böhm, Walter Mächtle, Peter Rossmanith, Sabine Kielhorn-Bayer, Klaus Müllen, Ulrike Rohr, Friedrich-Wilhelm Raulfs, Ulrike Schlösser, Wolfgang Schrof, Harutyun Hanciogullari, Karl Siemensmeyer, Paul Delavier, Rüdiger Sens, Torsten Freund, Takahiro Ikeda, Takanori Wakebe
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Patent number: 6624219Abstract: The present invention relates to a set of (co)polymers, dispersion formulations, solid solutions and formulation conditions able to disperse a dye selected from the group of a monoazo dye, quinophthalone dye and an anthraquinone dye in a stable nanoparticular form in an aqueous medium.Type: GrantFiled: August 17, 2000Date of Patent: September 23, 2003Assignees: BASF Aktiengesellschaft, SYMYX Technologies, Inc.Inventors: Robert Heger, Wolfgang Schrof, Michael Seufert, Helmut Auweter, Walter Mächtle, Rüdiger Iden, Dieter Horn, Ralph Nielsen, Eric Carlson, Chang Han-Ting, Sigrid Kuebler, Petro Miroslav
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Patent number: 6278518Abstract: A process for characterizing at least one sample comprising at least one substance (Si), in which at least one substance (Si) in the sample is identified and in which at least one quantity (Gji) which characterizes a substance (Si) in the sample is determined, at least the following process steps being carried out successively or simultaneously in an analytical centrifuging device: a) centrifuging the sample in an analytical centrifuge, b) exposing the sample to monochromatic light, preferably laser light, c) detecting light scattered by the sample, d) identifying at least one substance (Si) by a spectral evaluation of the inelastically scattered fraction of the scattered light which was detected in step c), e.g. by means of Raman scattering, and e) determining at least one quantity (Gji) for a substance (Si) by evaluating the state of the sample which it has entered as a consequence of the centrifuging in step a).Type: GrantFiled: July 6, 1998Date of Patent: August 21, 2001Assignee: BASF AktiengesellschaftInventors: Wolfgang Schrof, Peter Rossmanith, Walter Mächtle
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Patent number: 6218468Abstract: In a process for the preparation of an aqueous polymer dispersion by the free radical aqueous emulsion polymerization method, the polymerization is carried out in the presence of frozen micelles of amphiphilic substances.Type: GrantFiled: July 22, 1998Date of Patent: April 17, 2001Assignees: BASF Aktiengesellschaft, Max-Planck-InstitutInventors: Klemens Mathauer, Walter Mächtle, Wolfgang Schrof, Horst Schuch, Timo Rager, Wolfgang Meyer, Gerhard Wegner
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Patent number: 5624992Abstract: An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least one fine and at least one coarse aqueous starting polymer dispersion.Type: GrantFiled: March 29, 1995Date of Patent: April 29, 1997Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5498655Abstract: An aqueous polymer dispersion having a solids volume concentration of 50% by volume or more is obtainable by polymerizing radical polymerizable monomers other than vinyl or vinylidene halides by the method of free radical aqueous emulsion polymerization with the addition of an aqueous starting polymer dispersion having a certain diameter distribution of the starting polymer particles present therein by the stream addition process.Type: GrantFiled: January 17, 1995Date of Patent: March 12, 1996Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5496882Abstract: An aqueous polymer dispersion with a final solids volume concentration of at least 50% by volume is obtainable by polymerizing at least one radical polymerizable monomer by the method of free radical aqueous emulsion polymerization with the addition of an aqueous dispersion of a starting polymer.Type: GrantFiled: March 30, 1993Date of Patent: March 5, 1996Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5468799Abstract: An aqueous polymer dispersion with a final solids volume concentration of at least 50% by volume is obtainable by polymerizing at least one radical polymerizable monomer by the method of free radical aqueous emulsion polymerization with the addition of an aqueous dispersion of a starting polymer.Type: GrantFiled: March 31, 1994Date of Patent: November 21, 1995Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5442006Abstract: An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least one fine and at least one coarse aqueous starting polymer dispersion.Type: GrantFiled: April 19, 1994Date of Patent: August 15, 1995Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5436289Abstract: An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least two starting polymer dispersions, of which one contains not only particularly finely divided but also coarsely divided polymer particles.Type: GrantFiled: March 31, 1994Date of Patent: July 25, 1995Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5430092Abstract: In a process for preparing a final aqueous polymer dispersion having a solids volume concentration of 50% by volume or more, free-radically polymerizable monomers other than vinyl or vinylidene halides are subjected to a free radical aqueous emulsion polymerization by the feed stream addition process in the presence of an aqueous starting polymer dispersion whose dispersed starting polymer particles have a certain minimum diameter.Type: GrantFiled: February 28, 1994Date of Patent: July 4, 1995Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Josef Neutzner, Walter Maechtle
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Patent number: 5426146Abstract: An aqueous polymer dispersion having a solids volume concentration of 50% by volume or more is obtainable by polymerizing radical polymerizable monomers other than vinyl or vinylidene halides by the method of free radical aqueous emulsion polymerization with the addition of an aqueous starting polymer dispersion having a certain diameter distribution of the starting polymer particles present therein by the stream addition process.Type: GrantFiled: December 22, 1993Date of Patent: June 20, 1995Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5352720Abstract: An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least one fine and at least one coarse aqueous starting polymer dispersion.Type: GrantFiled: March 29, 1993Date of Patent: October 4, 1994Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzer, Walter Maechtle
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Patent number: 5350787Abstract: An aqueous polymer dispersion with a final solids volume concentration of at least 50% by volume is obtainable by polymerizing at least one radical polymerizable monomer by the method of free radical aqueous emulsion polymerization with the addition of an aqueous dispersion of a starting polymer.Type: GrantFiled: March 29, 1993Date of Patent: September 27, 1994Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 5340859Abstract: An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least two starting polymer dispersions, of which one contains not only particularly finely divided but also coarsely divided polymer particles.Type: GrantFiled: April 26, 1993Date of Patent: August 23, 1994Assignee: BASF AktiengesellschaftInventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
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Patent number: 4202632Abstract: A method of measurement for analytical ultracentrifuges with a multi-cell rotor and with simultaneous measurement of several cells, in which light pulses of constant energy are passed, independently of the rotor speed, through individual selectable measuring cells in the entire speed range and in which these light pulses can be provided either by a controlled laser beam or a controlled Kerr cell or a controlled gas discharge lamp.Type: GrantFiled: October 28, 1977Date of Patent: May 13, 1980Assignee: BASF AktiengesellschaftInventors: Walter Maechtle, Utz Klodwig