| abstract |
Phase segregated block-copolymer based on repeating structural elements represented by formula I n n n n n n n n n n wherein PHA represents at least one block based on one or more α-hydroxy acids, PDAS represents a central block based on a dialkylsiloxane, n the PDAS block has a weight average molecular weight in the range of from 4000 to 10000, n the blocks PHA have a weight average molecular weight in the range of from 2000 to 10 000, n the phase segregated block copolymer has a weight average molecular weight of from 40 000 to 120 000. |