| abstract |
The preparation of block copolymers containing at least one hydroxyl group which contain blocks of (meth)acrylate copolymers and polyalkylene oxide blocks of a certain composition, with the characterising feature that alkylene oxide is adducted onto (meth)acrylate copolymers containing at least one hydroxyl group and having a mean molecular weight of from 800 to 5,000 in the presence of metal hexacyanometallate complex catalysts. The block copolymers prepared according to the invention can be converted, by means of isocyanate group-containing compounds, into moulding compositions which have improved adhesion, improved overcoatability, simplified pigmentability and good water vapour permeability. |