Patent ID: 8034857

Claim:
A composition comprising a phase separated blend comprising: 50 to 80 weight percent of a polyetherimide; and 20 to 50 weight percent of a polyphenylene ether sulfone; wherein the phase separated blend comprises a dispersed phase having an average cross-section of 0.01 to 10 micrometers; wherein the composition initially has a multiaxial impact energy of greater than or equal to 45 ft-lbs (61 Joules) and after 300 hours steam autoclave exposure at 130 to 138° C. has a multiaxial impact energy of greater than or equal to 20 ft-lbs (27 Joules), wherein multiaxial impact energy is determined according to ASTM D3763 at 23° C.; wherein the composition has a tensile modulus of greater than or equal to 425,000 psi (2930 MPa) as determined according to ASTM D638; wherein the composition has a heat distortion temperature at 264 psi (1.8 MPa) of greater than or equal to 150° C. as determined according to ASTM D648 on a 3.2 millimeter thick sample; and wherein weight percent is based on the combined weight of polyetherimide and polyphenylene ether sulfone.