Patents by Inventor Erdmann Mielcke

Erdmann Mielcke 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).

  • Polyetheramines with polymers of .alpha., .beta.-unsaturated dicarboxylic acids
    Patent number: 5705603
    Abstract: The invention relates to reaction products of polyetheramines with polymers containing dicarboxylic anhydride groups, which contain 20-80, preferably 40-60, mol % of bivalent structural units A and/or C and, if required, B ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are hydrogen or methyl,a and b are equal to zero or one and a+b is equal to one,Y is X or NRR.sup.3,X is --OH, --O--C.sub.1-30 -alkyl, NR.sup.3 R.sup.4 or --O.sup..crclbar. N.sup..sym. R.sup.3 R.sup.4,R.sup.3 and R.sup.4, independently of one another, are hydrogen, C.sub.6 -C.sub.40 -alkyl or R,R is ##STR2## with the proviso that at least 1 mol % of the anhydride groups bonded to the polymer have reacted with a polyetheramine,Z is C.sub.2 -C.sub.4 -alkyl,n is a number from 1 to 1000,R.sup.5 is hydrogen, C.sub.1 -C.sub.30 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl or C.sub.6 -C.sub.30 -aryl andR.sup.6 is hydrogen or C.sub.1 -C.sub.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: January 6, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Krull, Michael Feustel, Erdmann Mielcke