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Abstract

The present invention relates to copolymeric polyaspartic ester amides which have been modified with alkyl or alkenyl radicals having 6-30 carbon atoms, to their preparation and to their use. Copolymers derived from polyamino acids, in which at least 75 mol % of the units present consist of structural units of the general formulae (I), (II) or (III) 1 in which the structural elements A are identical or different trifunctional hydrocarbon radicals having 2 carbon atoms of the type (A1) or (A2), where R.sup.1 may have the meanings of R.sup.4, R.sup.5, and R.sup.6, R.sup.2 is identical or different, straight-chain or branched, saturated or unsaturated alkyl, alkenyl or aryl radicals having from 1 to 30 carbon atoms, hydroxyl or aminoalkyl radicals having from 1 to 22 carbon atoms and from 1 to 6 hydroxyl and/or amino groups and/or their acylation products with from 1 to 22 C carboxylic acids or assumes the meaning of R.sup.5, and R.sup.3 is hydrogen or R.sup.2, R.sup.4 is one or more radicals from the group consisting of alkali metals, alkaline earth metals, hydrogen or ammonium, [NR.sup.7R.sup.8R.sup.9R.sup.10].sup.+, where R.sup.7 to R.sup.10 independently of one another are hydrogen, alkyl or alkenyl having from 1 to 22 carbon atoms or hydroxyalkyl having from 1 to 22 carbon atoms, having from 1 to 6 hydroxyl groups. R.sup.5 is identical or different, straight-chain or branched, saturated or unsaturated alkyl or alkenyl radicals R.sup.11 having from 6 to 30 carbon atoms or radicals of the structure --Y--R.sup.11, where Y is an oligo- or polyoxyalkylene chain having from 1 to 100 oxyalkylene units, and R.sup.6 is identical or different, straight-chain or branched, saturated or unsaturated alkyl or alkenyl radicals having from 1 to 5 carbon atoms, and in each case at least one unit of the general formula (I) in which the radical R.sup.1 assumes the meaning of R.sup.4, and at least one unit of the general formula (II) is present, and the units of the general formula (III) are proteinogenic or nonproteinogenic amino acids and are present in amounts of no more than 20% by weight, based on copolymeric polyaspartic acid derivatives.

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