Hydrolytically Decomposable Ionic Copolymers

The present invention provides novel hydrolytically decomposable ionic copolymers. These ionic copolymers are made up of a cyclic ketene acetal A, an anionic or cationic methacrylic acid derivative B selected from 2-methyl-methacrylate, [2-(2-methyl-1-methylen-allyloxy)-ethane sulfonate, [2-(2-methyl-1-methylen-allyloxy)ethyl]-phosphonate or a quaternary amine of N,N-dimethylaminoethylmethacrylic acid (DMAEMA) and optionally a neutral methacrylic acid derivative C. According to the invention, hydrolytically decomposable ionic copolymers are produced by polymerizing the components A, B and C in the presence of a radical starter under a protective gas atmosphere, followed by purification. All copolymers according to the invention are hydrolytically decomposable. Copolymers containing a maximum of 40 mol-% of ester groupings in the backbone are also biodegradable, wherein in the case of cationic copolymers a maximum of 20 mol-% quaternized DMAEMA may be present. Cationic copolymers containing at least 50 mol-% of component B are antimicrobial. Both anionic as well as cationic copolymers are suitable for the production of nanoparticles. Cationic copolymers can be used a superhydrophobic materials as well as adhesives. Anionic copolymers are suitable as biodegradable thermoplastic elastomers and as biodegradable ionomers.

EP 2,265,648


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