Patents by Inventor Hans-Helmut Friedrich

Hans-Helmut Friedrich 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: 7671118
    Abstract: A stabilizer system for stabilizing halogen-containing polymers comprising a perchlorate salt and at least one indole compound, a composition comprising such a stabilizer system, process for stabilizing a chlorine-containing polymer using such a stabilizer system, and an article manufacture comprising PVC stabilized by such a stabilizer system.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: March 2, 2010
    Assignee: Chemtura Vinyl Additives, GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Patent number: 7612133
    Abstract: The invention relates to a process for preparing a stabilized suspension/emulsion polymer of halogen-containing monomers with addition of a polymer stabilizer mixture compatible with the polymerization medium prior to, during or directly after the polymerization process, and to the polymers prepared by this process.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: November 3, 2009
    Assignee: Chemtura Vinyl Additives GmbH
    Inventors: Karl-Josef Kuhn, Hans-Helmut Friedrich
  • Publication number: 20090170988
    Abstract: A stabilizer system for stabilizing halogen-containing polymers against thermal degradation, the stabilizer system comprising: (a) at least one perfluoroalkanesulphonate salt; and (b) at least one alkanolamine wherein the at least one alkanolamine has the general formula (I)
    Type: Application
    Filed: March 3, 2009
    Publication date: July 2, 2009
    Applicant: Crompton Vinyl AdditivesGmbH
    Inventors: Wolfgang WEHNER, Hans-Helmut Friedrich
  • 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
  • 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
  • Publication number: 20070299175
    Abstract: The invention relates to a process for preparing a stabilized suspension/emulsion polymer of halogen-containing monomers with addition of a polymer stabilizer mixture compatible with the polymerization medium prior to, during or directly after the polymerization process, and to the polymers prepared by this process.
    Type: Application
    Filed: August 28, 2007
    Publication date: December 27, 2007
    Inventors: Karl-Josef Kuhn, Hans-Helmut Friedrich
  • Publication number: 20060270765
    Abstract: The invention relates to stabilising systems for stabilising chlorinated polymers. The inventive stabilising systems contain a) at least one type of perfluoroalkane sulfonate salt and b) at least one or several indoles of general formula (I) and/or urea of general formula (II) and/or alcanolamines of general formula (III) and/or amonouracils.
    Type: Application
    Filed: April 7, 2004
    Publication date: November 30, 2006
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • 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
  • Publication number: 20060192179
    Abstract: A stabilizer system for stabilizing halogen-containing polymers comprising a perchlorate salt and at least one indole compound, a composition comprising such a stabilizer system, process for stabilizing a chlorine-containing polymer using such a stabilizer system, and an article manufacture comprising PVC stabilized by such a stabilizer system.
    Type: Application
    Filed: March 28, 2006
    Publication date: August 31, 2006
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • 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
  • Patent number: 7077981
    Abstract: The invention relates to stabilizer systems, containing at least: a) a perchlorate salt; b) at least one or more compounds from the group consisting of carbamides, indole derivatives and enamines of formula (I), wherein n=1 or 2 and X=O or NR1; n=3–6 and X=O; R1=H, C1–C4-alkyl, C2–C6-alkenyl, C6–C10-aryl, C7–C18-alkaryl or C7–C18-aralkyl; R2 (if n=1)=C1–C22-alkyl, C2–C22-alkenyl or aryl, preferably phenyl, optionally substituted with up to 3 hydroxy, C1–C4-alkoxy or C1–C9-alkyl; or R2 (if n=2–6)=linear or branched C1-22-alkylene, optionally interrupted by one or more O or S atoms, wherein R2 (if n=3) can also be a C2–C3-alkyl trisubstituted isocyanurate; if X=NH R2 can also be H. Said stabilizer systems are suitable for stabilizing halogen-containing polymers, more particularly PVC.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: July 18, 2006
    Assignee: Crompton Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Publication number: 20060148941
    Abstract: Compositions comprising a chlorinated polymer and at least one compound of formula (I) where R1 or R2=linear or branched C3-C22 alkyl, unsubstituted or substituted with C1-C4 alkyl/alkoxy and/or hydroxy phenyl, unsubstituted or substituted by C1-C4 alkyl/alkoxy and/or hydroxy phenyl C1-C4 alkyl, linear or branched C3-C18 alkenyl, C3-C8— cycloalkyl, C3-C10 alkyl or C3-C10 hydroxyalkyl or acetoxy/benzoyloxy C2-C10 alkyl interrupted by at least one oxygen atom, as stabilisers for halogenated polymers.
    Type: Application
    Filed: November 19, 2003
    Publication date: July 6, 2006
    Inventors: Wofgang Wehner, Hans-Helmut Friedrich
  • 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
  • Publication number: 20040259988
    Abstract: The invention relates to a process for preparing a stabilized suspen-sion/emulsion polymer of halogen-containing monomers with addition of a polymer stabilizer mixture compatible with the polymerization medium prior to, during or directly after the polymerization process, and to the polymers pre-pared by this process.
    Type: Application
    Filed: May 3, 2004
    Publication date: December 23, 2004
    Inventors: Karl-Josef Kuhn, Hans-Helmut Friedrich
  • Publication number: 20040132875
    Abstract: The invention relates to stabilizer systems, containing at least: a) a perchlorate salt; b) at least one or more compounds from the group consisting of carbamides, indole derivatives and enamines of formula (I), wherein n=1 or 2 and X═O or NR1; n=3-6 and X═O; R1═H, C1-C4-alkyl, C2-C6-alkenyl, C6-C10-aryl, C7-C18-alkaryl or C7-C18-aralkyl; R2 (if n=1)=C1-C22-alkyl, C2-C22-alkenyl or aryl, preferably phenyl, optionally substituted with up to 3 hydroxy, C1-C4-alkoxy or C1-C9-alkyl; or R2 (if n=2-6)=linear or branched C1-C22-alkylene, optionally interrupted by one or more O or S atoms, wherein R2 (if n=3) can also be a C2-C3-alkyl trisubstituted isocyanurate; if X═NH R2 can also be H. Said stabilizer systems are suitable for stabilizing halogen-containing polymers, more particularly PVC.
    Type: Application
    Filed: February 25, 2004
    Publication date: July 8, 2004
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Publication number: 20040054043
    Abstract: The invention relates to stabilizer mixtures which are suited for stabilizing polymers that contain halogen, particularly PVC, whereby said mixtures contain: a) a perchlorate salt, and; b) an alkanolamine of formula (I) or a reaction product consisting of a monofunctional or polyfunctional epoxide and ammonia or of a monofunctional or poly-functional dialkyl (aryl)amine or monoalkyl (aryl)amine.
    Type: Application
    Filed: September 25, 2003
    Publication date: March 18, 2004
    Inventors: Hans-Helmut Friedrich, Karl-Josef Kuhn, Wolfgang Wehner, Thomas Hopemann
  • Patent number: 6274654
    Abstract: A description is given of compositions comprising a chlorine-containing polymer and at least one compound of the general formula I where Y is S or O, and R1 and R2 independently of one another are unsubstituted or C1-C4-alkyl-, C1-C4-alkoxy- and/or hydroxyl-substituted phenyl, phenyl-C1-C4-alkyl which is unsubstituted or substituted on the phenyl ring by C1-C4-alkyl, C1-C5-alkoxy and/or hydroxyl, or are C3-C6-alkenyl, C5-C8-cycloalkyl, or C2-C10-alkyl interrupted by at least 1 oxygen atom, or, if R1 and R2 are different from one another, one of the two radicals can be C2-C12-alkyl and the other can be C2-C12-alkyl or one of the above radicals, or, if R1 and R2 are identical, both can also be C5-C12-alkyl, and, if Y is sulfur, R1 and R2 cannot be octyl.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: August 14, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Markus Kolb
  • Patent number: 6232375
    Abstract: The invention relates to 4-aminopyrimidinediones and oxazolidino-4-aminopyrimidinediones of the formula I and II given below, a process for their preparation, their use for stabilizing halogen-containing polymers, and compositions composed of compounds of the formula I or II and of chlorine-containing polymers, in particular PVC.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: May 15, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Patent number: 6211270
    Abstract: A description is given of compositions comprising a chlorine-containing polymer and at least one compound of the general formula I where x is oxygen or sulfur, and R is C2-C22-acyloxyalkyl or C1-C12-alkyl which may be interrupted by 1 to 3 oxygen atoms and/or substituted by 1 to 3 OH groups, or is C3-C8-alkenyl, C7-C10-phenylalkyl, C5-C8-cycloalkyl, C7-C10-alkylphenyl, phenyl or naphthyl, where the aromatic radical in each case may be substituted by —OH, C1-C12-alkyl and/or OC1-C4-alkyl, and R1 is hydrogen or is as defined for R.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: April 3, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Hans-Helmut Friedrich, Wolfgang Wehner
  • Patent number: 6194494
    Abstract: A stabiliser combination, mainly for PVC, is described, comprising A) at least one compound of formula I  wherein R*1 and R*2 are each independently of the other C1-C12alkyl, C3-C6lkenyl, C5-C8cycloalkyl that is unsubstituted or substituted by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or by chlorine atoms, or C7-C9phenylalkyl that is unsubstituted or substituted at the phenyl ring by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or chlorine atoms, and R*1 and R*2 may additionally be hydrogen and C1-C12alkyl, and Y is S or O, and B) at least one compound from the following groups: B1) perchlorate compounds, B2) glycidyl compounds, B3) beta-diketones and beta-keto esters, B4) dihydropyridines and polydihydropyridines, B5) polyols and disaccharide alcohols, B6) sterically hindered amines (tetraalkylpiperidine compounds), B7) alkali aluminosilicates (zeolites), B8) hydrotalcites, B9) alkali aluminocarbonates (dawsonite
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 27, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher, Hans-Ludwig Mehner, Rolf Drewes