| abstract |
The present invention i. At least one segment consisting of at least one ether unit E and at least one ester unit, wherein the ether units and ester units are linked by ether bonds or by ester bonds, where the sum of the number of ether units and ester units is at least 3, wherein the ether units and ester units are arranged in random order, and ii. Acid functionality comprising at least one acidic group selected from the group consisting of phosphoric acid groups, acidic phosphoric acid ester groups, sulfonic acid groups, acidic sulfonic acid ester groups and carboxylic acid groups, wherein at least one acidic group is covalently bonded to at least one segment Sex compounds. |