Abstract: The invention relates to copolymers that contain structural units of the formula (I), of the formula (II) and optionally of the formula (III) —NR1—CHR3—CHR4— (I), —NH—CO—CHR7— (II), —NH—CHR9—CHR10— (III), or structural units of the formula (IV), of the formula (V) and optionally of the formula (VI) NR1—CHR3—CHR4—CHR5— (IV), —NH—CO—CHR7—CHR8— (V), —NH—CHR9—CHR10—CHR11— (VI), wherein R1 is a residue of the formula —CO—R2, of the formula —CO—NH—R2 or of the formula —CH2—CH(OH)—R12, R3, R4, R5, R7, R8, R9, R10 and R11 independently of each other represent hydrogen, methyl, ethyl, propyl or butyl, and R2 and R12 represent hydrogen or selected organic residues. These copolymers are characterized by good degradability and can be used, for example, for preparing active ingredient formulations.

Abstract: Functionalised polyglycine-poly(alkylene imine)-copolymers, the preparation thereof and use thereof for preparing formulations of or for complexing anionic active ingredients and effect substances Disclosed are copolymers comprising structural units of formula (I), of formula (II) and of formula (III) —NR1—CHR3—CHR4-??(I), —NH—CO—CHR7-??(II), —NH—CHR9—CHR10-??(III), or structural units of formula (IV), of formula (V) and of formula (VI) —NR1—CHR3—CHR4—CHR5-??(IV), —NH—CO—CHR7—CHR8-??(V), —NH—CHR9—CHR10—CHR11-??(VI), wherein R1 is a radical of formula —CO—R2, of formula —CO—NH—R2, of formula —CH2—CH(OH)— R12 or of formula —CH2—CH(NH2)—R12, R3, R4, R5, R7, R8, R9, R10 and R11 independently of one another represent hydrogen, methyl, ethyl, propyl or butyl, and R2 and R12 represent hydrogen or selected organic radicals.