Autoclavable containers comprising poly(aryl ether sulfones) having environmental stress-crack resistance
AssigneeAmoco Corporation
InventorsMarvin E. Sauers, Barry L. Dickinson
Life of this patent
Estimating the term…
Abstract
An autoclavable container comprising a poly(aryl ether) resin capable of withstanding at least 1000 cycles of steam sterilization at a stress level of 500 psi without stress-crack failure, said steam sterilization cycle conducted for 30 min. at 270.degree. F. and 27 psi using aqueous morpholine at a concentration of 50 ppm.
Claims3
An autoclavable container comprising a poly(aryl ether sulfone) capable of withstanding at least 1000 cycles of steam sterilization at a stress level of 500 psi without stress-crack failure, said steam sterilization cycle conducted for 30 min. at 270.degree. F. and 27 psi using aqueous morpholine at a concentration of 50 ppm, said poly(aryl ether sulfone) consisting of from 60 to about 100 mole % of the structural unit:
- ##STR5## and, correspondingly, from 40 to 0 mole % of the structural unit:
- ##STR6## with the proviso that no other structural units are present.
An autoclavable package comprising medical instruments and a container comprising a poly(aryl ether sulfone) capable of withstanding at least 1000 cycles of steam sterilization at a stress level of 500 psi without stress-crack failure, said steam sterilization cycle conducted for 30 min. at 270.degree. F. and 27 psi using aqueous morpholine at a concentration of 50 ppm, said poly(aryl ether sulfone) consisting of from 80 to about 100 mole % of the structural unit:
- ##STR9## and, correspondingly, from 20 to 0 mole % of the structural unit:
- ##STR10## with the proviso that no other structural units are present.
Dependencies are inferred from the claim text.