摘要 |
(EN) The present invention relates to copolymers obtainable by polymerizing a monomer composition composed of a) 0% to 40% by weight of one or more ethylenically unsaturated ester compounds of the formula (I) in which R is hydrogen or methyl, R1 is a linear or branched alkyl radical having 1 to 5 carbon atoms, R<SUP>2 </SUP>and R<SUP>3 </SUP>independently are hydrogen or a group of the formula -COOR', in which R<SUP>1 </SUP>is hydrogen or an alkyl group having 1 to 5 carbon atoms, b) 10% to 99.9% by weight of one or more ethylenically unsaturated ester compounds of the formula (II) in which R is hydrogen or methyl, R<SUP>4 </SUP>is a linear or branched alkyl radical having 6 to 15 carbon atoms, R<SUP>5 </SUP>and R<SUP>6 </SUP>independently are hydrogen or a group of the formula -COOR', in which R' is hydrogen or an alkyl group having 6 to 15 carbon atoms, c) 0% to 80% by weight of one or more ethylenically unsaturated ester compounds of the formula (III) in which R is hydrogen or methyl, R<SUP>7 </SUP>is a linear or branched alkyl radical having 16 to 30 carbon atoms, R<SUP>8 </SUP>and R<SUP>9 </SUP>independently are hydrogen or a group of the formula -COOR'', in which R'' is hydrogen or an alkyl group having 16 to 30 carbon atoms, d) 0.1% to 30% by weight of one or more ethylenically unsaturated, polar ester compounds of the formula (IV) in which R is hydrogen or methyl, X is oxygen, sulphur or an amino group of the formula -NH- or -NR<SUP>a</SUP>-, in which Ra is an alkyl radical having 1 to 40 carbon atoms, R<SUP>10 </SUP>is a radical which encompasses 2 to 1000 carbon atoms and has at least 2 heteroatoms, R<SUP>11 </SUP>and R12 independently are hydrogen or a group of the formula -COX'R<SUP>10'</SUP>, in which X' is oxygen or an amino group of the formula -NH- or -NR<SUP>a</SUP>-, in which R<SUP>a'</SUP> is an alkyl radical having 1 to 40 carbon atoms, and R<SUP>10'</SUP> is a radical which encompasses 1 to 100 carbon atoms, and e) 0% to 50% by weight of comonomer, based in each case on the total weight of the ethylenically unsaturated monomers.
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