POLYARYLSULPHONE - POLYARYLKETONE - POLYMIDE COMPOSITION

摘要

A polymer composition contains a polyarylketone, a polyarylsulphone and a polyimide. The polyketone may be a polyaryletheretherketone, and the polyarylsulphone may be a polyarylethersulphone. The polyimide may be a polyetherimide in which the repeating group contains the unit The composition contains at least 5% by weight of the polyarylketone and the polyarylsulphone and at least 10% of the polyimide. The proportion of the polyarylketone is preferably 30 to 70% by weight. The proportion of polyarylsulphone is preferably 15 to 40% by weight. The proportion of polyimide is preferably 10 to 30% by weight. A composition of 60% by weight of polyaryletheretherketone; 20% by weight of polyarylethersulphone and 20% by weight of polyetherimide forms a mixture with good compatibility, has a high glass transition temperature and retains a melting point close to that of the polyaryletheretherketone.