Patents by Inventor Hans-Michael Walter

Hans-Michael Walter 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).

  • Publication number: 20160090447
    Abstract: A continuous process for the preparation of polyoxazolines comprises mixing monomers, an initiator, and optionally an additive, feeding the mixture into at least one tubular reactor segment with a feed side and an outlet side, and polymerizing the mixture to form the polyoxazolines. A tubular reactor segment comprises a mixer for forming a mixture comprising monomers, an initiator, an additive, a terminating agent, and/or a functionalizing agent, at least first and second tubular reactor segments, and addition devices for the first and second tubular reactor segments.
    Type: Application
    Filed: May 6, 2014
    Publication date: March 31, 2016
    Inventors: Fatemeh Ahmadnian, Valeria Zakharova, Hans-Michael Walter, Andreas Brodhagen, Holger Türk
  • Publication number: 20100292422
    Abstract: The invention relates to a method for producing copolymers made from isobutene and at least one vinylaromatic component. Said method consists of polymerising isobutene or a hydrocarbon mixture containing isobutene with at least one vinylaromatic compound in the presence of a solvent-stable transistion metal complex comprising slightly co-ordinating anions as a polymerisation catalyst. The invention also relates to copolymers made of isobutene and at least one vinylaromatic compound, which can be obtained by means of said inventive method, in addition to specific functionalisation products therefrom.
    Type: Application
    Filed: August 11, 2006
    Publication date: November 18, 2010
    Applicant: BASF SE
    Inventors: Hans Peter Rath, Hans-Michael Walter, Oskar Nuyken, Fritz Elmar Kuehn, Yanmei Zhang, Hui Yee Yeong, Brigitte Voit, Radha Krishnan Narayanan
  • Publication number: 20100170636
    Abstract: A description is given of a semi-interpenetrating network having a first phase of a linear noncrosslinked isobutene polymer and a second phase of a crosslinked polymer, wherein the crosslinked polymer is obtained by crosslinking molecular enlargement reaction in the presence of the isobutene polymer. The crosslinked polymer is preferably obtained by free-radical polymerization of ethylenically unsaturated monomers comprising at least one polyethylenically unsaturated monomer. The networks are suitable as molding compounds having gas and moisture barrier effect or as adhesives.
    Type: Application
    Filed: June 19, 2008
    Publication date: July 8, 2010
    Applicant: BASF SE
    Inventors: Phillip Hanefeld, Nicole Hildebrandt, Klaus Muehlbach, Helmut Mach, Hans-Michael Walter, Dominique Teyssie, Odile Fichet, Cedric Vancaeyzeele, Benjamin Davion
  • Publication number: 20090105432
    Abstract: The invention relates to a method for polymerising ethylenically unsaturated monomers, wherein ethylenically unsaturated monomers are polymerised in the presence of a solvent-stable transition metal complex having slightly co-ordinating anions as polymer catalysts. The invention also relates to specific solvent-stable transition metal complexes having slightly co-ordinating anions. The invention also relates to highly reactive copolymers which are made of monomers comprising isobutene and at least one vinylaromatic compound which can be obtained according to said inventive method.
    Type: Application
    Filed: August 11, 2006
    Publication date: April 23, 2009
    Applicant: BASF SE
    Inventors: Hans Peter Rath, Hans-Michael Walter, Oskar Nuyken, Fritz Elmar Kuehn, Yanmei Zhang, Hui Yee Yeong
  • Publication number: 20090023882
    Abstract: Preparation of polyisobutylene having a content of terminal double bonds of more than 50% by polymerizing isobutene using a polymerization catalyst customary therefor from a technical 1-butene-, 2-butene- and isobutene-containing C4 hydrocarbon stream which may comprise up to 3000 ppm by weight, of 1,3-butadiene, by reducing the content of oxygenates in the C4 hydrocarbon stream before the polymerization of the isobutene by contacting it with an inorganic adsorbent at a pressure of from 1 to 20 bar and a temperature of from 20 to 220° C.
    Type: Application
    Filed: February 15, 2007
    Publication date: January 22, 2009
    Applicant: BASF SE
    Inventors: Phillip Hanefeld, Hans-Michael Walter, Matthias Kiefer, Helmut Mach, Thomas Wettling, Marcus Sigl, Markus Schubert, Jurgen Stephan, Rainer Papp, Frank Poplow
  • Publication number: 20090018298
    Abstract: Certain copolymers formed from alkenes and one or more activated alkenes. In particular copolymers of isobutylene and one or more activated alkenes. Activated alkenes are, for example, selected from alkyl acrylates, alkyl methacrylates, maleic anhydride, or isobutenyl succinic anhydride.
    Type: Application
    Filed: February 4, 2008
    Publication date: January 15, 2009
    Inventors: Josef Michl, Kamesh Vyakaranam, Stefanie Koerbe, Phillip Hanefeld, Hans-Michael Walter, Arno G. Lange
  • Publication number: 20080293900
    Abstract: Preparation of highly reactive isobutene homo- or copolymers having Mn=from 500 to 1 000 000 by polymerizing isobutene in the liquid phase in the presence of a dissolved, dispersed or supported metal-containing catalyst complex by using, as the catalyst complex, a compound I Zn+[MXa(OR)b]n?·Lx ??(I) M metal atom from the group of boron, aluminum, gallium, indium and thallium, R each independently aliphatic, heterocyclic or aromatic hydrocarbon radicals which have in each case from 1 to 18 carbon atoms and may comprise fluorine atoms, or silyl groups comprising C1 to C18 hydrocarbon radicals, X halogen atoms, Z proton (n=1), optionally substituted ammonium (n=1) or n-valent metal cation, L neutral solvent molecules, a integer from 0 to 3, b integer from 1 to 4, where a+b=4, and x?0.
    Type: Application
    Filed: November 15, 2006
    Publication date: November 27, 2008
    Applicant: BASF SE
    Inventors: Phillip Hanefeld, Marcus Sigl, Volker Bohm, Michael Roper, Hans-Michael Walter, Ingo Krossing
  • Publication number: 20080249264
    Abstract: Preparation of highly reactive isobutene homo- or copolymers with Mn=from 500 to 1 000 000 by polymerizing isobutene from technical C4 hydrocarbon streams having an isobutene content of from 1 to 90% by weight in the liquid phase in the presence of a dissolved, dispersed or supported catalyst complex, by using, as the catalyst complex, a protic acid compound I [H+]kYk?.Lx ??(I) Yk? weakly coordinating k-valent anion which comprises at least one hydrocarbon moiety, L neutral solvent molecules and x?0.
    Type: Application
    Filed: November 15, 2006
    Publication date: October 9, 2008
    Applicant: BASF SE
    Inventors: Phillip Hanefeld, Volker Bohm, Marcus Sigl, Nina Challand, Michael Roeper, Hans-Michael Walter
  • Publication number: 20080249267
    Abstract: Preparation of highly reactive isobutene homo- or copolymers having Mn=from 500 to 45 000 by polymerizing isobutene in the liquid phase in the presence of a dissolved, dispersed or supported boron-containing catalyst complex, by using, as the catalyst complex, a protic acid compound I [H+]m+1[R1R2R3B—(-Am+—BR5R6—)n—R4](m+1)?.Lx ??(I) R1 to R6 each independently aliphatic, heterocyclic or aromatic, fluorinated hydrocarbon radicals having in each case from 1 to 18 carbon atoms, or silyl groups comprising C1 to C18 hydrocarbon radicals, A nitrogen-containing bridging member which forms covalent bonds to the boron atoms via its nitrogen atoms, L neutral solvent molecules, n=0 or 1, m=0 or 1 and x is ?0.
    Type: Application
    Filed: November 15, 2006
    Publication date: October 9, 2008
    Applicant: BASF SE
    Inventors: Phillip Hanefeld, Volker Bohm, Marcus Sigl, Nina Challand, Michael Roper, Hans-Michael Walter, Brigitte Voit, Fritz Elmar Kuehn, Ahmed Hijazi, Radha Krishnan Narayanan
  • Publication number: 20080221285
    Abstract: The invention relates to a solvent-stable metal catalyst having slightly coordinating counter anions of formula I [M(L)a(Z)b]m+m(A?)(I), wherein M represents a transition metal of groups 3-12 of the periodic system, a lanthanide or a metal of groups 2 or 13 of the periodic system; L represents a solvent molecule; Z represents a mono or polycharged ligand; A? represents a slightly or non coordinated anion; a represents a whole number which is greater than or equal to 1; b represents a whole number which is greater than or equal to 1, whereby the total from a and b is between 4 and 8, and m represents a whole number from 1 6. The invention also relates to a method for polymerising olefinically unsaturated compounds in the presence of said catalyst and copolymers which are made of monomers comprising isobutene and at least one vinylaromatic compound which is obtained according to said inventive method.
    Type: Application
    Filed: August 11, 2006
    Publication date: September 11, 2008
    Applicant: BASF SE
    Inventors: Hans-Michael Walter, Mirjam Herrlich-Loos, Fritz Elmar Kuehn, Yanmei Zhang, Brigitte Voit, Radha Krishnan Narayanan
  • Publication number: 20080125549
    Abstract: A process for coupling a living carbocationic polymer by reacting two molecules of a living carbocationic polymer with a coupling agent, the coupling agent having the formula I: CR1R2?CR3-Zn—CR4?CR5R6 ??(I) wherein R1, R2, R3, R4, R5 and R6 are, independently from one another, hydrogen, alkyl, or alkenyl, or two of R1, R2, R3, R4, R5 and R6, together are alkylene or alkenylene, Z is CR7R8, R7 and R8 are, independently from one another, hydrogen or alkyl, and n is 0 or an integer from 1 to 5, with the proviso that, when R3 is hydrogen, both R1 and R2 are different from hydrogen, and, when R4 is hydrogen, both R5 and R6 are different from hydrogen. The process allows for the convenient preparation of ABA-type block copolymers and of telechelic polymers.
    Type: Application
    Filed: November 29, 2006
    Publication date: May 29, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Judit E. PUSKAS, Szilard Csihony, Konrad Knoll, Heike Pfistner, Hans-Michael Walter
  • Patent number: 7064164
    Abstract: The present invention relates to mixtures comprising linear block copolymers made from vinylaromatic monomers and from dienes of the structure (I) S1-B1-S2 and (II) S3-B2-S4, where S1 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 40,000 to 100,000 g/mol, each of S2, S3 and S4 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 5,000 to 20,000 g/mol, each of B1 and B2 is a block made from dienes or a copolymer block made from dienes and from vinylaromatic monomers with numberaverage molar mass Mn in the range from 15,000 to 40,000 g/mol, and the ratio of the block copolymers (I)/(II) is in the range from 0.6 to 2.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: June 20, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Konrad Knoll, Philippe Desbois, Hans-Michael Walter, Michael Ishaque, Till Gerlach, Friederike Osswald
  • Publication number: 20050272875
    Abstract: The invention relates to anionically polymerized impact polystyrene which is characterized in that it has a melt volume flow rate MVR of at least 8 cm3/10 min which is measured in accordance with EN ISO 1133 at a test temperature of 200°C. and with a nominal load of 5 kg.
    Type: Application
    Filed: September 4, 2003
    Publication date: December 8, 2005
    Applicant: BASF Aktiengesellschaft
    Inventors: Philippe Desbois, Hans-Dieter Schwaben, Ulrike Dardin, Hans-Michael Walter
  • Publication number: 20050009990
    Abstract: Mixtures comprising linear block copolymers made from vinylaromatic monomers and from dienes of the structure (I) S1—B1—S2 and (II) S3—B2—S4, where S1 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 40,000 to 100,000 g/mol, each of S2, S3 and S4 is a block made from vinylaromatic monomers with number-average molar mass Mn in the range from 5,000 to 20,000 g/mol, each of B1 and B2 is a block made from dienes or a copolymer block made from dienes and from vinylaromatic monomers with number-average molar mass Mn in the range from 15,000 to 40,000 g/mol, and the ratio of the block copolymers (I)/(II) is in the range from 0.6 to 2.
    Type: Application
    Filed: November 19, 2002
    Publication date: January 13, 2005
    Inventors: Konrad Knoll, Philippe Desbois, Hans-Michael Walter, Michael Ishaque, Till Gerlach, Friederike Osswald
  • Patent number: 5334658
    Abstract: A thermoplastic molding material contains, based on the sum of A and B,A: from 75 to 97% by weight of a polystyrene A as a hard matrix andB: from 3 to 25% by weight of a particulate, elastomeric (co)polymer B based essentially on butadiene or its copolymers, in turn consisting of, based on B,B1: from 40 to 98% by weight of a (co)polymer B1 having a mean particle size of from 100 to 600 nm andB2: from 2 to 60% by weight of a particle blend B2 which in turn consists of, based on B2,B21: from 1 to 60% by weight of a (co)polymer B21 having a particle size of from 200 to 1,200 nm andB22: from 40 to 99% by weight of a (co)polymer B22 having a mean particle size of from 1,200 to 8,000 nm,(co)polymer B1 having an encapsulated-particle morphology and (co)polymers B21 and B22 having a cellular and/or coiled particle morphology.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: August 2, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Uwe Blumenstein, Peter Klaerner, Horst Schuch, Hans-Michael Walter
  • Patent number: 5266647
    Abstract: A copolymer with stellate branching, of the general formula [A-].sub.k X, where A is the monovalent radical of a homopolymer, block copolymer or random copolymer of a conjugated diene and/or vinyl-aromatic hydrocarbon, k is a number from 1 to 10, and X is the k-valent radical of a coupling center produced by coupling with hexatriene, and the product of the hydrogenation thereof are described.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: November 30, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Dietmar Bender, Klaus Bronstert, Hans-Michael Walter, Daniel Wagner, Helmut Mach
  • Patent number: 5036130
    Abstract: A transparent thermoplastic molding material contains, based on A+B,A: from 5 to 95% by weight of polystyrene andB; from 95 to 5% by weight of a nonelastomeric star block copolymer which is composed of, based on B, b.sub.1 from 60 to 95% by weight of styrene and b.sub.2 from 5 to 40% by weight of one or more conjugated dienes of 4 or 5 carbon atoms and is prepared in a conventional manner by sequential anionic polymerization using one or more organolithium compounds as an initiator and in the presence of a solvent with subsequent coupling.In this process, component A is produced by conventional anionic polymerization using one or more organolithium compounds in the presence of an organic solvent.The molding material is prepared by mixing the components A and B, with or without C, in a conventional manner and is used for the production of moldings.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: July 30, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Michael Walter, Klaus Bronstert, Hermann Gausepohl, Juergen Pohrt
  • Patent number: 4839434
    Abstract: Homo- or copolymers which have terminal mercapto groups, are composed of one or more monomers from the group consisting of butadiene, isoprene and styrene and are obtained by anionic polymerization of one or more of the stated monomers in the presence of one or more organolithium compounds followed by reaction (of the living anions) with an episulfide of the general formula I ##STR1## where R is hydrogen, alkyl of 1 to 18 carbon atoms or aryl of 6 to 10 carbon atoms, with the formation of one or more primary or secondary mercapto groups at the end of the polymer chain(s) are prepared by a process in which a thiolcarboxylic acid of the general formula II ##STR2## where R.sup.1 is hydrogen, alkyl of 1 to 10 carbon atoms or --CH.sub.2 --COOH and R.sup.2 is 0 or from 1 to 10 CH.sub.2 units, is added directly to the resulting reaction mixture in an amount of from 0.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: June 13, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Bronstert, Hans-Michael Walter, Hans-Dieter Schwaben
  • Patent number: 4822945
    Abstract: Decene oligomers useful with or without hydrogenation as basis for synthetic lubricating oils are prepared by oligomerizing decene-1 in the presence of an alkylaluminum chloride catalyst and an alkyl halide cocatalyst, in a first reaction stage the decene-1 being mixed with the catalyst at from 0 to +25.degree. C. and being kept in contact therewith within the same temperature range for not less than 15 minutes and in a second reaction stage the cocatalyst being added at from 0 to +35.degree. C. in the course of a period of from 15 to 180 minutes.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: April 18, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Bronstert, Helmut Mach, Hans P. Rath, Hans-Michael Walter