Patents by Inventor Heinz Klima

Heinz Klima 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).

  • Electrodeposition bath containing a urethane
    Patent number: 5338419
    Abstract: An electrodeposition bath comprising a urethane of the formulaR.sub.1 --NHCOO--R.sub.2in whichR.sub.1 is alkyl or a group of the formulaB.sub.1 --NH--B.sub.2 --[X--B.sub.3 ].sub.n --,R.sub.2 is a group of the formulae --(C.sub.2 H.sub.4 O).sub.y --R.sub.1, --(C.sub.3 H.sub.7 O).sub.y --R or of the formula ##STR1## R is C.sub.1 -C.sub.18 -alkyl, Y is a number from zero to 4,B.sub.1 is hydrogen, alkyl or a group of the formula--COOR.sub.2,B.sub.2 and B.sub.3 may be identical or different and are C.sub.2 -C.sub.14 -alkylene,n is an integer from 0 to 5,X is --0--, --S--, --NH--or >N--(C.sub.1 -C.sub.4) alkyl,R.sub.3 is hydrogen, alkyl, alkenyl, hydroxyalkyl, phenyl or alkylphenyl,R.sub.4 and R.sub.5 may be identical or different and are hydrogen or C.sub.1 -C.sub.4 -alkyl andA is a direct bond or one of the groups --O--, --CH.sub.2 O- or --CH.sub.2 OCO--.The inclusion of these urethanes in the electrodeposition bath brings about a reduction in the number of surface defects on galvanized surfaces.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: August 16, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Susanne Wehner, Heinz Klima, Michael Hoenel, Peter Ziegler, Gerd Walz