| 摘要 |
A polymer comprising essentially units of formula I <IMAGE> I where R1 and R2 are each hydrogen or methyl, and R3 is C4-C18-alkyl, C5-C8-cycloalkyl, C6-C10-aryl or C6-C10-aryl-C1-C4-alkyl, each of which except for the C4-C18-alkyl may be monosubstituted, disubstituted or trisubstituted by radicals selected from the group consisting of C1-C4-alkyl, C1-C4-alkoxy and halogen, and having a carboxyl and anhydride group content of equal to or less than 0.40 equivalent per kilogram of polymer and an inherent color (measured as yellowness index) of equal to or less than 2.0, is obtainable by reacting a polymer based on C1-C20-alkyl esters of (meth)acrylic acid with a primary amine of the general formula II R3NH2II by removing the alcohol that forms during the reaction from the reaction mixture.
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