Patents by Inventor David E. Horst

David E. Horst 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).

  • Viscosity breaking process for olefin polymers
    Patent number: 8618224
    Abstract: Disclosed is a method for viscosity breaking of a polypropylene polymer, a polypropylene copolymer or a polypropylene polymer blend, which process comprises adding a chain transfer agent and an initiator to a polypropylene polymer, polypropylene copolymer or polypropylene polymer blend and heating the resultant composition. The chain transfer agent has a Cs value of greater than or equal to about 0.04 as measured in ethylene polymerization at 130° C. The initiator is for example an organic or inorganic peroxide, a carbon based radical generator, a bis azo compound, a stable nitroxyl compound, a sterically hindered NO-acyl compound or a sterically hindered alkoxyamine compound.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: December 31, 2013
    Assignee: BASF SE
    Inventors: David E. Horst, Michael Roth, Peter Nesvadba
  • Viscosity Breaking Process for Olefin Polymers
    Publication number: 20130245203
    Abstract: Disclosed is a method for viscosity breaking of a polypropylene polymer, a polypropylene copolymer or a polypropylene polymer blend, which process comprises adding a chain transfer agent and an initiator to a polypropylene polymer, polypropylene copolymer or polypropylene polymer blend and heating the resultant composition. The chain transfer agent has a Cs value of greater than or equal to about 0.04 as measured in ethylene polymerization at 130° C. The initiator is for example an organic or inorganic peroxide, a carbon based radical generator, a bis azo compound, a stable nitroxyl compound, a sterically hindered NO-acyl compound or a sterically hindered alkoxyamine compound.
    Type: Application
    Filed: May 14, 2013
    Publication date: September 19, 2013
    Applicant: BASF SE
    Inventors: David E. Horst, Michael Roth, Peter Nesvadba
  • Degradation of polypropylene with hydroxylamine ester compositions
    Patent number: 8168725
    Abstract: The invention relates to novel composition comprising hydroxylamine esters and thio compounds, which are suitable for lowering the molecular weight of polypropylene, propylene copolymers or polypropylene blends and result in an excellent degradation performance at temperatures below 220° C.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: May 1, 2012
    Assignee: BASF SE
    Inventors: Michael Roth, Peter Nesvadba, David E. Horst
  • DEGRADATION OF POLYPROPYLENE WITH HYDROXYLAMINE ESTER COMPOSITIONS
    Publication number: 20110207892
    Abstract: The invention relates to novel composition comprising hydroxylamine esters and thio compounds, which are suitable for lowering the molecular weight of polypropylene, propylene copolymers or polypropylene blends and result in an excellent degradation performance at temperatures below 220° C.
    Type: Application
    Filed: May 2, 2011
    Publication date: August 25, 2011
    Inventors: Michael Roth, Peter Nesvadba, David E. Horst
  • Degradation of polypropylene with hydroxylamine ester compositions
    Patent number: 7956109
    Abstract: The invention relates to novel composition comprising hydroxylamine esters and thio compounds, which are suitable for lowering the molecular weight of polypropylene, propylene copolymers or polypropylene blends and result in an excellent degradation performance at temperatures below 220° C.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: June 7, 2011
    Assignee: BASF SE
    Inventors: Michael Roth, Peter Nesvadba, David E. Horst