| abstract |
Polyarylene ether sulfones which have a reduced viscosity of 0.1 to 2.0 dl/g, measured at 25 DEG C. in a 1% solution in N-methylpyrrolidone (NMP), and which contain, based on the total number of structural units present in the polyarylene ether sulfone resin, 99-1 mol % of a recurring structural unit of formula I <IMAGE> (I) and 1-99 mol % of a recurring structural unit of formula II -O-Ar2-O-Ar1-(II) wherein the aromatic rings in the structural unit of formula I are unsubstituted or substituted by one or more C1-C4alkyl groups, C1-C4alkoxy groups or halogen atoms, Ar1 is a radical of formula IIIa-IIIc <IMAGE> (IIIa) wherein a is 0 or 1, <IMAGE> (IIIb) or <IMAGE> (IIIc) which radical is unsubstituted or substituted by one or more C1-C4alkyl groups, C1-C4alkoxy groups or halogen atoms, and Ar2 is a radical of formula IVa-IVe <IMAGE> (IVa) wherein b is 0 or 1 <IMAGE> (IVb) <IMAGE> (IVc) <IMAGE> (IVd) wherein c is 0 or 1 <IMAGE> (IVe) wherein Z is -CO-, -SO2-, -SO-, -S-, -O-, <IMAGE> <IMAGE> wherein R is methyl or phenyl, which radical is unsubstituted or substituted by one or more C1-C4alkyl groups, C1-C4alkoxy groups or halogen atoms, are soluble in customary organic solvents and can be processed from the solution to films or incorporated in other matrix resins. |