Patents by Inventor Peter J. Arndt

Peter J. Arndt 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).

  • Patent number: 5567826
    Abstract: Described is a process for producing (meth)acrylates with Formula (I) ##STR1## with R.sub.1 is H or CH.sub.3, and A and B are each independently unbranched or branched alkylene groups with 2 to 5 C atoms, comprising the step of reacting a (meth)acrylate of the Formula (II), ##STR2## wherein R.sub.2 is alkyl especially with 1 to 4 C atoms and R.sub.1 is as defined above, with an alcohol of the Formula (III) ##STR3## wherein A and B are as defined above in the presence of an alkali earth catalyst or alkaline earth metal catalyst or a mixture thereof.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: October 22, 1996
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Joachim Knebel, Peter J. Arndt, Werner Ude
  • Patent number: 5017631
    Abstract: Powders of an emulsion polymer having reduced fines and exhibiting low dusting are made by spray drying an emulsion of a polymer having a Vicat softening temperature above 60.degree. C., said emulsion containing an external plasticizer having a boiling point of at least 150.degree. C.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: May 21, 1991
    Assignee: Rohm GmbH
    Inventors: Hubert Rauch, Peter J. Arndt, Wolfgang Klesse, Wilhelm Krall, Klaus Frank
  • Patent number: 4892932
    Abstract: The formation of interfering polymer deposits in spary drying apparatus during the spray drying of aqueous dispersions or solutions of polymers in a stream of warm air is avoided if water is atomized together with the dispersion or solution.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: January 9, 1990
    Assignee: Rohm GmbH
    Inventors: Hubert Rauch, Peter J. Arndt
  • Patent number: 4892910
    Abstract: Polymer powders comprising aggregated polymer particles, said powders having a low content of fines and being suitable as processing aids in the manufacture of polyvinyl chloride, are made by spray drying an aqueous dispersion (latex) of two emulsion polymers, one of which has a dynamic glass transition temperature above 90.degree. C. and the other of which has a dynamic glass transition below 105.degree. C., the latter being at least 10 K. degrees below the former.
    Type: Grant
    Filed: July 13, 1988
    Date of Patent: January 9, 1990
    Assignee: GmbH Rohm
    Inventors: Wolfgang Klesse, Hubert Rauch, Peter J. Arndt, Norbert Suetterlin
  • Patent number: 4877853
    Abstract: A method for making a thermoplastically processable polymer by emulsion polymerizing at least 80 percent by weight of methyl methacrylate monomer with up to 20 percent by weight of at least one other monomer in an aqueous phase at a temperature from 0.degree. C. to 100.degree. C. in the presence of a polymerization initiator and a chain transfer agent in a molar ratio from 1:2 to 1:100,000, said chain transfer agent being from 0.01 to 5 percent by weight of said monomers, and then separating said polymer and said aqueous phase.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: October 31, 1989
    Assignee: Rohm GmbH
    Inventors: Werner Siol, Ernst Heil, Franz Wenzel, Peter J. Arndt, Ulrich Terbrack
  • Patent number: 4777632
    Abstract: Data storage disks containing optically readable information made from a copolymer having low water absorption and good optical and mechanical properties, said copolymer being at least ternary and comprising(A) methyl methacrylate, and further comonomers selected from at least two of the groups(B) ##STR1## where R' is hydrogen or methyl and R" is hydrogen or alkyl, and (C) ##STR2## where R'" is aliphatic or alicyclic hydrocarbon, and (D) styrene and/or alpha-methyl styrene.
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: October 11, 1988
    Assignee: Rohm GmbH
    Inventors: Franz Wenzel, Peter J. Arndt, Werner Siol
  • Patent number: 4745213
    Abstract: A method of preparing an ester of (meth)acrylic acid by transesterification with an alcohol, comprising, reacting a (meth)acrylic acid ester formed from an alcohol of 1 to 4 carbon atoms with a transesterifying alcohol, which is not a polybasic alcohol and which is different from the alcohol portion of said (meth)acrylic acid ester, in the presence of a catalyst system comprised of compounds A+B, wherein compound A is Li.sub.n Y, wherein Y is a halide, chlorate, carbonate, carboxylate of 1 to 6 carbon atoms, an alkoxide of 1 to 4 carbon atoms, hydroxide or oxide, and n is 1 or 2, depending on the valence of Y; and compound B is CaX.sub.q, wherein X is oxide or chloride and q is 1 or 2, depending on the valence of X, with the provision that at least one of the two anionic components Y and X is oxygen-containing.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: May 17, 1988
    Assignee: Rohm GmbH Chemische Fabrik
    Inventors: Fritz Schlosser, Peter J. Arndt, Manfred Mueller, Lothar Janssen
  • Patent number: 4709000
    Abstract: Copolymers exhibiting low water absorption and having good optical and mechanical properties, suitable for use in making data storage disks containing optically readable information, said copolymer being at least ternary and comprising(A) methyl methacrylate, and further comonomers selected from at least two of the groups(B) ##STR1## where R' is hydrogen or methyl and R" is hydrogen or alkyl, and (C) ##STR2## where R'" is aliphatic or alicyclic hydrocarbon, and (D) styrene and/or alpha-methyl styrene.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: November 24, 1987
    Assignee: Rohm GmbH
    Inventors: Franz Wenzel, Peter J. Arndt, Werner Siol
  • Patent number: 4672105
    Abstract: A method for preparing an ester of (meth)acrylic acid with a polyhydric alcohol comprising, transesterifying a (meth)acrylic acid ester derived from an alcohol of 1-4 carbon atoms with a transesterifying polyhydric alcohol in the presence of at least one metal compound catalyst system, said catalyst system being comprised of compounds A or a combination of compounds A+B, wherein A represents at least one compound of the formula: Li.sub.n Y, wherein Y is halide, chlorate, carbonate, carboxylate of 1 to 6 carbon atoms, an alkoxide of 1 to 4 carbon atom, hydroxide or oxide and n is 1 or 2, and wherein B is the compound: CaX.sub.q, wherein X is oxide or chloride, and q is 1 or 2; with the provision that at least one of the two anionic components Y and X is oxygen-containing.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: June 9, 1987
    Assignee: Rohm GmbH Chemische Fabrik
    Inventors: Fritz Schlosser, Peter J. Arndt, Manfred Mueller, Lothar Janssen
  • Patent number: 4636458
    Abstract: Homopolymers of para-methylstyrene and copolymers thereof with monomers such as methyl methacrylate, which polymers exhibit very low water absorption in combination with good optical and mechanical properties and are useful for making optically readable data storage disks.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: January 13, 1987
    Assignee: Rohm GmbH
    Inventors: Franz Wenzel, Peter J. Arndt, Werner Siol
  • Patent number: 4614827
    Abstract: A method for isolating a vinyl salt compound in solid form from an aqueous solution thereof by spray drying such an aqueous salt solution.
    Type: Grant
    Filed: July 10, 1984
    Date of Patent: September 30, 1986
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Franz Wenzel, Manfred Muller, Fritz Schlosser
  • Patent number: 4543383
    Abstract: What are disclosed are a continuous emulsion polymerization method for making an aqueous dispersion of an impact resistant resin, adaptable to use as a component of impact resistant polymethacrylate forming masses, by first emulsion polymerizing a first monomer component onto core particles of a seed latex until a degree of polymerization of said monomers from 80 to 95 percent is attained, whereby an intermediate product comprising said core particles covered with a rubbery polymer phase is obtained, and then emulsion polymerizing a second monomer component onto the particles of said intermediate product to form a shell of harder polymer on the particles of said intermediate product, and impact resistant resin products made by this method.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: September 24, 1985
    Assignee: Rohm GmbH
    Inventors: Ernst Heil, Franz Wenzel, Peter J. Arndt, Walter Schellhaas
  • Patent number: 4521567
    Abstract: A method for making impact resistant molding compositions wherein a hard phase having a glass transition temperature above 25.degree. C. and consisting principally of methyl methacrylate is polymerized at least partially in a first stage, following which the monomers of a rubbery phase whose polymers have a glass transition temperature below 25.degree. C. are added in a second stage and the polymerization is carried to completion, polymerization of the hard phase in the first stage being performed in a presence of an oil soluble free radical initiator and of an organosulfur chain transfer agent having at least two thiol groups in the molecule, and polymerization of the monomers of the rubbery phase in the second stage being carried out with graft crosslinkers in the presence of the previously formed hard phase.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: June 4, 1985
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Walter Ludwig, Manfred Munzer, Werner Siol, Franz Wenzel
  • Patent number: 4517380
    Abstract: Methacrylamidopropyl trimethylammonium chloride and similar quaternized aminoalkyl esters or aminoalkylamides of acrylic acid or methacrylic acid are purified by extraction of an aqueous solution thereof with dichloromethane to remove impurities, such as allyl methacrylamide, which may be formed by a Hofmann degradation of the compounds.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: May 14, 1985
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Manfred Muller, Fritz Schlosser, Franz Wenzel
  • Patent number: 4513118
    Abstract: An emulsion polymer comprising a hard nonelastomeric core, an elastomeric intermediate stage produced in the presence of the core and essentially composed of an acrylic ester and a crosslinking monomer which contains three or more acrylic or methacrylic groups in the molecule, and a hard nonelastomeric final stage produced in the presence of the elastomeric intermediate stage and crosslinked therewith, said polymer being useful as an impact strength modifying agent which, in admixture with a thermoplastic polymethyl methacrylate molding compound for example, yields molded articles exhibiting reduced susceptibility to stress whitening and improved impact strength.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: April 23, 1985
    Assignee: Rohm GmbH
    Inventors: Norbert Suetterlin, Peter J. Arndt, Ernst Heil, Werner Siol, Willi Tilch, Wilhelm Wopker
  • Patent number: 4463032
    Abstract: What are disclosed are a method for making non-blocking soft polymer beads by applying an adherent polymer deposit on the beads, said deposited polymer having a glass transition temperature at least 10.degree. C. higher than the glass transition temperature of the soft polymer beads, which latter temperature is below 70.degree. C., and non-blocking soft polymer beads made by this method.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: July 31, 1984
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Werner Siol, Walter Ludwig, Franz Wenzel
  • Patent number: 4418204
    Abstract: What is disclosed is a method for the transesterification of lower alkyl esters of .alpha.,.beta.-unsaturated acids such as acrylic and methacrylic acid, with an epoxy alcohol, such as glycidol, which uses 1,4-diazabicyclo(2,2,2)octane as a transesterification catalyst.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: November 29, 1983
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Joachim Lowitz, Manfred Muller, Fritz Schlosser
  • Patent number: 4361687
    Abstract: What is disclosed is a method for making a water soluble polymer of low molecular weight which forms aqueous solutions of low viscosity, which method comprises polymerizing an .alpha.,.beta.-unsaturated water soluble monomer or a mixture of such monomers in a concentrated aqueous solution of said monomer or mixture in the presence of a free radical forming initiator and of formic acid or a water soluble salt thereof as a chain transfer agent.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: November 30, 1982
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Klaus Ross, Franz Wenzel
  • Patent number: 4239876
    Abstract: What is disclosed is a method for the quaternization of tertiary aminoalkyl esters or tertiary aminoalkyl amides of acrylic acid or of methacrylic acid in admixture with from 30 to 80 percent, by weight of the mixture, of acrylamide employing an alkylating agent in the absence of water to form, in high yield and in short reaction time, a mixture containing the corresponding quaternization products in the form of a fluid mixture which can be used directly for the preparation of copolymers of acrylamide.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: December 16, 1980
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Joachim Lowitz, Franz Wenzel
  • Patent number: 4206143
    Abstract: What is disclosed is the method for making an N-substituted acrylamide or an N-substituted methacrylamide which comprises reacting an alkyl ester of acrylic acid or of methacrylic acid with an aliphatic amine or with an aromatic amine at a temperature between 50.degree. C. and 180.degree. C. in the presence of a catalytic amount of a dialkyl tin oxide.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: June 3, 1980
    Assignee: Rohm GmbH
    Inventors: Franz Wenzel, Peter J. Arndt, Fritz Schlosser, Siegmund Besecke, Heinz-Juergen Hohage, Guenter Schroeder