Patents by Inventor Mark R. Kratz

Mark R. Kratz 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).

  • Color reduction of polymethylene poly (phenylisocyanates)
    Patent number: 6166128
    Abstract: This invention relates to a process for the reduction of color of polymethylene poly(phenylisocyanates). This process comprises mixing a polymethylene poly(phenylisocyanate) with an epoxide having an epoxide equivalent weight of about 44 to about 700, and heating this mixture to a temperature of from about 35 to about 150.degree. C. for at least about 15 minutes, with stirring. Suitable epoxides include epoxidized fatty acid monoglycerides, epoxidized fatty acid diglycerides, epoxidized fatty acid triglycerides, epoxidized dimer fatty acids and epoxidized trimer fatty acids.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: December 26, 2000
    Assignee: Bayer Corporation
    Inventors: Rick L. Adkins, Clarence D. Blue, Jeffrey S. Bolton, Kirk J. Bourgeois, Mark R. Kratz, Brian H. Peterson, Roger C. Suter, Kenneth P. Yonek
  • Continuous process for the preparation of highly stable, finely divided, low viscosity polymer polyols of small average particle size
    Patent number: 5814699
    Abstract: A continuous process for the preparation of highly stable, finely divided, low viscosity polymer polyols of small average particle size wherein in the first step an intermediate is prepared by reacting (1) a mixture of at least two ethylenically unsaturated monomers, preferably styrene and acrylonitrile, in a mixture comprising (2) a base polyol and (3) a macromer in the presence of (4) a free radical initiator, (5) a solvent having moderate chain transfer activity, and, optionally, (6) a reaction moderator at a temperature of at least 100.degree. C., such that the intermediate contains at least about 12% by weight of macromer, based on the weight of the base polyol and macromer, and a solids content of at least about 15% by weight and less than about 30% by weight, based on the weight of the base polyol, macromer and ethylenically unsaturated monomers.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: September 29, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Mark R. Kratz, Manfred Dietrich, Torsten Heinemann, Gundolf Jacobs, Josef Sanders, Helmut Woynar
  • Polyurea rim systems
    Patent number: 5219973
    Abstract: The present invention is directed to a RIM process and an isocyanate reactive composition for use therein. The isocyanate composition includes an amine terminated chain extender and an aromatic amine terminated polyether of the formula: ##STR1## wherein R is an n-valent group obtained by the removal of hydroxyl groups from an n-hydroxy group containing polyhydroxyl compound having a molecular weight of from about 300 to about 12,000,R.sub.1 represents hydrogen or an inert substituent,R.sub.2 represents hydrogen, an amine group, or an inert substituent, andn represents an integer from 2 to 4.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: June 15, 1993
    Assignee: Miles Inc.
    Inventors: William E. Slack, Mark R. Kratz