Suitable alcohol components for the synthesis of the polyesters include aliphatic, cycloaliphatic and/or aromatic alcohols with 1 to 6, preferably 1 to 4, hydroxyl groups attached to non-aromatic carbon atoms which alcohols contain 1 to 24 carbon atoms per molecule, e.g. glycols such as ethylene glycol, propylene glycol, butanediols or hexanediols; ether alcohols; diethylene and triethylene glycol