Basf Se Corporation

Liqun Ren

Motonori Yamamoto

Harald Keller

Gabriel Skupin

Hermann Seyffer

Andreas Greiner

Thomas Kissel

Robert Loos

Claudia Esper

Seema Agarwal

Gimmy Alex Fernandez Ramirez

The invention at hand provides hydrolytically degradable ionic copolymers. These ionic copolymerizates are composed of one cyclic ketene acetal A, one anionic or cationic methacrylic acid derivative B, selected from 2-methyl-methacrylate, [2-(2-methyl-1-methylene-allyloxy)]ethanesulfonate, [2-(2-methyl-1-methylene-allyloxy)ethyl]phosphonate or a quaternary amine of the N,N-dimethylaminoethylmethacrylic acid (DMAEMA) and, optionally, a neutral methacrylic acid derivative C. The hydrolytically degradable anionic copolymers according to the present invention are produced by polymerizing the components A, B and C in the presence of a radical initiator under inert gas atmosphere and subsequent purification. All copolymers according to the present invention are hydrolytically degradable. Copolymers comprising a maximum of 40 mol-% of ester groups in the backbone are additionally biodegradable, wherein in the case of cationic copolymers a maximum of 20 mol-% of quaternized DMAEMA is allowed to be available. Cationic copolymers comprising at least 50 mol-% of the component B are antimicrobial. Both anionic as well as cationic copolymers are suitable for producing nanoparticles. Cationic copolymers are suitable for being used as superhydrophobic materials as well as adhesives. Anionic copolymers are suitable for biodegradable thermoplastic elastomers and for biodegradable ionomers.

Hydrolytically decomposable ionic copolymers

The present invention relates to a process for producing aqueous dispersions of thermoplastic polymers which have a plurality of ester groups and/or carbonate groups in the main polymer chain and which have an acid number of less than 5 mg KOH/g, in particular at most 3 mg KOH/g, and which have a zero-shear viscosity &#x3b7;(180&#xb0; C.) of at least 60 Pa&#xb7;s at 180&#xb0; C. The invention also relates to the polymer dispersions obtainable by said process, and to the use thereof.

Process for producing aqueous dispersions of thermoplastic polyesters

A water-soluble or water-dispersible copolymer comprises copolymerized units a) of at least one ethylenically unsaturated monomer with a saccharide side group and b) of at least one hydrophilic ethylenically unsaturated monomer different from (meth)acrylamide, where the weight fraction of the ethylenically unsaturated monomers with a saccharide side group is 5 to 95% by weight. The copolymers exhibit high affinity to inorganic surfaces or hydrophilic fibers, such as cotton. They serve as soil release and/or graying-inhibiting polymers in textile detergents or minimize the risk of microbial colonization of materials coated therewith.

Polymers with saccharide side groups and their use

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Mannheim, Germany

Liqun Ren