Patents by Inventor Norbert G untherberg

Norbert G untherberg 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).

  • Transparent, impact-resistant molding materials having high stress cracking resistance and a dull surface
    Patent number: 5576385
    Abstract: Thermoplastic molding materials containing a mixture of(A) from 15 to 70% by weight of a methacrylate polymer,(B) from 10 to 50% by weight of a copolymer obtained by polymerization of a mixture of(B1) a vinylaromatic monomer and(B2) a vinyl cyanide,(C) from 20 to 50% by weight of a graft copolymer of(C1) 50-80% by weight of a core of(C11) from 50 to 100% by weight of a 1,3-diene and(C12) from 0 to 50% by weight of a vinylaromatic monomer and(C2) 20-50% by weight of a graft shell of(C21) a C.sub.1 -C.sub.8 -alkyl ester of methacrylic or acrylic acid and(C22) a vinylaromatic monomer,with the proviso that the medium particle size (d.sub.50) of the graft copolymer is chosen in the range from 40 to 500 nm, and(D) from 0.5 to 15% by weight of a crosslinked methacrylate polymer.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: November 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Kristin Tiefensee, Norbert G untherberg, Rainer Neumann, Ekkehard Jahns