Patents by Inventor James-Michael Barnes

James-Michael Barnes 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).

  • Method for producing prepolymers containing isocyanate end groups, incorporating a small proportion of base isocyanates
    Patent number: 6667370
    Abstract: This invention relates to a process for producing prepolymers, which contain isocyanate terminal groups and which have a very low content of free isocyanate starting materials, from polyester polyols and polyisocyanates.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: December 23, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: James-Michael Barnes, Manfred Schmidt, Stefan Wershofen, Andreas Hoffmann
  • Polyester polyols and the use of polyester polyols for producing pur cast elastomers that have an improved resistance to hydrolysis
    Publication number: 20030040597
    Abstract: The polyester polyols according to the invention with an average equivalent weight in the range from 200 to 4,000, which were prepared by reacting &agr;,&ohgr;-dicarboxylic acids with butane 1,4-diol, hexane 1,6-diol, propane 1,3-diol or pentane 1,5-diol and with polyols having 3 to 6 hydroxyl groups, are used for the preparation of PUR pourable elastomers with improved resistance to hydrolysis.
    Type: Application
    Filed: August 29, 2002
    Publication date: February 27, 2003
    Inventors: James-Michael Barnes, Michael Schneider, Andreas Hoffmann
  • Polyurethane prepolymers and polyurethane elastomers based on 1,4-naphthalene diisocyanate
    Publication number: 20020123594
    Abstract: Polyurethane prepolymers and polyurethane elastomers based on 1,4-naphthalene are described. Methods of preparing the polyurethane prepolymers and elastomers are also described. Molded articles capable of withstanding high mechanical stresses, prepared from the polyurethane prepolymers and/or polyurethane elastomers of the present invention, are further described.
    Type: Application
    Filed: November 30, 2001
    Publication date: September 5, 2002
    Inventors: Andreas Hoffmann, Joachim Zechlin, James-Michael Barnes, Hartmut Nefzger, Lothar Duda, Bodo Temme
  • N,N?-disubstituted N-(2-hydroxyalkyl)-ureas
    Patent number: 6177494
    Abstract: Non-crystallizing N,N′-disubstituted N-(2-hydroxyalkyl)-ureas are used as hydrolysis protection agents in plastics containing ester groups. These disubstituted hydroxy-alkylureas impart excellent protection from hydrolysis to plastics containing ester groups and can be added directly to the plastics to be stabilized without the addition of special solvents.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: January 23, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Richard Kopp, James-Michael Barnes, Hans-Dieter Ruprecht, Hans-Georg Wussow