Patents by Inventor Thomas Hopfmann

Thomas Hopfmann 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).

  • Stabilizer system for stabilizing halogen-containing polymers
    Patent number: 7393887
    Abstract: A composition and process is disclosed for the stabilization of halogen-containing polymers. In particular, chlorine-containing polymers such as poly vinyl chloride (PVC) are stabilized by incorporating of a stabilizer mixture having at least a perchlorate salt and an alkanolamine.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: July 1, 2008
    Assignee: Crompton Corporation
    Inventors: Hans-Helmut Friedrich, Karl-Josef Kuhn, Wolfgang Wehner, Thomas Hopfmann
  • Stabilizer system for stabilizing PVC
    Patent number: 7358286
    Abstract: Disclosed are stabilizer mixtures comprising at least a) one alkanolamine or one reaction product of a monofunctional or polyfunctional epoxide and ammonia or a monofunctional or polyfunctional dialkyl(aryl)amine or monoalkyl(aryl)amine, and b) one uracil or one initial product and an optional perchlorate salt.
    Type: Grant
    Filed: December 20, 2003
    Date of Patent: April 15, 2008
    Assignee: Chemtura Vinyl Additives GmbH
    Inventors: Thomas Hopfmann, Hans-Helmut Friedrich, Karl-Josef Kuhn, Wolfgang Wehner
  • Stabilizer system for the stabilisation of halogenated polymers
    Publication number: 20060235124
    Abstract: The invention relates to a mixture of stabilisers for the stabilisation of chlorinated polymers, comprising at least a) a sulphate ester salt and/or a sulphonate salt of formula (I): [R(O)aSO3]1M and b) an alkanolamine of formula (II), where M=alkali, earth alkali, lanthanide (Cer) or aluminium cation, t=metal cation valence of 1, 2 or 3; s=0 or 1, R=C1-C22 a phenyl, C7-C10 phenylalkyl, C7 -C24 alkylphenyl, x=1, 2 or 3: y=1, 2, 3, 4, 5 or 6; n=1-10. R1, R2 independently=H.
    Type: Application
    Filed: April 2, 2004
    Publication date: October 19, 2006
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Karl-Josef Kuhn, Thomas Hopfmann
  • Stabilizer system for stabilizing halogen-containing polymers
    Publication number: 20060183830
    Abstract: A composition and process is disclosed for the stabilization of halogen-containing polymers. In particular, chlorine-containing polymers such as poly vinyl chloride (PVC) are stabilized by incorporating of a stabilizer mixture having at least a perchlorate salt and an alkanolamine.
    Type: Application
    Filed: April 3, 2006
    Publication date: August 17, 2006
    Inventors: Hans-Helmut Friedrich, Karl-Josef Kuhn, Wolfgang Wehner, Thomas Hopfmann
  • Stabilizer system for stabilizing pvc
    Publication number: 20060052497
    Abstract: Disclosed are stabilizer mixtures comprising at least a) one alkanolamine or one reaction product of a monofunctional or polyfunctional epoxide and ammonia or a monofunctional or polyfunctional dialkyl(aryl)amine or monoalkyl(aryl)amine, and b) one uracil or one initial product and an optional perchlorate salt
    Type: Application
    Filed: December 20, 2003
    Publication date: March 9, 2006
    Applicant: Crompton Vinyl Additives GmbH
    Inventors: Thomas Hopfmann, Hans-Helmut Friedrich, Karl-Josef Kuhn, Wolfgang Wehner