Abstract: A process for the oxidation of 2-phenoxypropionic acid to 2-(4-hydrophenoxy)propionic acid using microorganisms is described.

Abstract: A thermoplastic molding material contains, in each case based on the sum of the constituents A, B and C,A: 10 to about 90% by weight of a styrene polymer A,B: 10 to about 90% by weight of a polyolefin B, andC: 1 to 20% by weight of an unsymmetrical linear three-block copolymer C of the structure S.sub.1 -D-S.sub.2, prepared by anionic polymerization from styrene and butadiene and/or isoprene, S.sub.1 and S.sub.2 each denoting a polystyrene block and D denoting a polydiene block,wherein the three-block copolymer C has a styrene content, based on C, of from 50 to 85% by weight and the terminal blocks S.sub.1 and S.sub.2 built up from styrene differ by at least 50% in their molecular weight.