Patents by Inventor Karlheinz Haubennestel

Karlheinz Haubennestel 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).

  • Thixotropic agent for use in coating compositions
    Patent number: 4314924
    Abstract: Thixotropic compositions comprising a solution of a urea urethane having the formula as hereinafter set out dissolved in a polar aprotic solvent containing 0.1-2.0 mol LiCl per urea group:R--O--CO--NH--R'--NH--CO--NH--R"--NH--CO--NH--R'--NH--CO--ORwherein R represents C.sub.n H.sub.2n+1 -- or C.sub.m H.sub.2m+1 (C.sub.p H.sub.2p O).sub.r --; n represents an integer having a value of from 4 to 22; m represents an integer having a value of from 1 to 18; p represents an integer having a value of from 2 to 4; and r represents an integer having a value of from 1 to 10. ##STR1## The solids content in the aprotic solvent amounts to 10-75 wt. % and preferably to from 40-60 wt. %.
    Type: Grant
    Filed: May 25, 1979
    Date of Patent: February 9, 1982
    Assignee: Byk-Mallinckrodt Chemische Produkte GmbH
    Inventors: Karlheinz Haubennestel, Rainer Mehren