| 摘要 |
Copolymers which comprise in copolymerized form, (A) 60 to 99% by weight of at least one monoethylenically unsaturated polyalkylene oxide monomer of the formula I <?in-line-formulae description="In-line Formulae" end="lead"?>H<SUB>2</SUB>C-CR<SUP>1</SUP>-X-Y<img id="PRIVATE-USE-CHARACTER-00001" he="7.20mm" wi="8.47mm" file="US20070129516A1-20070607-Parenopenst.TIF" alt="private use character Parenopenst" img-content="character" img-format="tif" />-R<SUP>2</SUP>-O-<img id="PRIVATE-USE-CHARACTER-00002" he="7.20mm" wi="8.47mm" file="US20070129516A1-20070607-Parenclosest.TIF" alt="private use character Parenclosest" img-content="character" img-format="tif" /><SUB>n</SUB>-R<SUP>3</SUP> I <?in-line-formulae description="In-line Formulae" end="tail"?> in which the variables have the following meanings: X is -CH<SUB>2</SUB>- or -CO-, if Y is -O-; is -CO-, if Y is -NH-; Y is -O- or -NH-; R<SUP>1 </SUP>is hydrogen or methyl; R<SUP>2 </SUP>are identical or different C<SUB>2</SUB>-C<SUB>6</SUB>-alkylene radicals, which may be linear or branched and may be arranged blockwise or randomly; R<SUP>3 </SUP>is hydrogen or C<SUB>1</SUB>-C<SUB>4</SUB>-alkyl; n is an integer from 3 to 50, (B) 1 to 40% by weight of at least one quaternized nitrogen-containing monoethylenically unsaturated monomer, (C) 0 to 39% by weight of anionic monoethylenically unsaturated monomers and (D) 0 to 30% by weight of other nonionic monoethylenically unsaturated monomers and have an average molecular weight M<SUB>w </SUB>of from 2000 to 100 000, and use of these copolymers as dispersants for clay minerals.
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