Polyethersulfone compositions with high heat and good impact resistance
View Patent ↗Polyethersulfones having Tg greater than about 225° C. and a notched Izod value greater than about 1 ft-lb/in, as measured by ASTM D256, comprise from about 5 mol % to less than about 40 mol % structural units of formula 1; and from greater than about 60 mol % to about 95 mol % structural units of formula 2 wherein R 1 , R 2 , and R 3 are independently at each occurrence a halogen atom, a nitro group, a cyano group, a C 1 -C 12 aliphatic radical, C 3 -C 12 cycloaliphatic radical, or a C 3 -C 12 aromatic radical; n, m, q are independently at each occurrence integers from 0 to 4; and Q is a C 3 -C 20 cycloaliphatic radical, or a C 3 -C 20 aromatic radical.
1. A polyethersulfone having Tg greater than about 225° C. and a notched Izod value greater than about 1 ft-lb/in, said polyethersulfone comprising
from about 10 mol % to less than about 40 mol % structural units of formula 1; and
from greater than about 60 mol % to about 90 mol % structural units of formula 2
wherein
R 1 , R 2 , and R 3 are independently at each occurrence a halogen atom, a nitro group, a cyano group, a C 1 -C 12 aliphatic radical, C 3 -C 12 cycloaliphatic radical, or a C 3 -C 12 aromatic radical;
n, m, q are independently at each occurrence integers from 0 to 4; and
Q is a C 3 -C 20 cycloaliphatic radical, or a C 3 -C 20 aromatic radical.
2. A polyethersulfone according to claim 1 wherein Q is
3. A polyethersulfone according to claim 1 wherein Q is
4. A polyethersulfone according to claim 2 wherein Q is
5. A polyethersulfone according to claim 2 wherein Q is
6. A polyethersulfone according to claim 1 wherein said polyethersulfone comprises
from about 10 mol % to about 30 mol % structural units of formula 1; and
from about 70 mol % to about 90 mol % structural units of formula 2.
7. A polyethersulfone according to claim 1 , having a weight average molecular weight of greater than about 45,000 grams per mole as measured by gel permeation chromatography using polystyrene molecular weight standards.
8. An article comprising a polyethersulfone according to claim 1 .
9. A polyethersulfone according to claim 1 , wherein n, m, q are each 0.
10. A polyethersulfone according to claim 1 , wherein
n, m, q are each 0;
said polyethersulfone comprises
from about 10 mol% to about 30 mol% structural units of formula 1; and
from about 70 mol% to about 90 mol% structural units of formula 2; and
said polyether sulfone has a weight average molecular weight of greater than about 45,000 grams per mole as measured by gel permeation chromatography using polystyrene molecular weight standards.
11. An article comprising a polyethersulfone according to claim 10 .
12. A polyethersulfone according to claim 4 , having Tg greater than about 235° C.
13. A polyethersulfone according to claim 12 , consisting of
from about 10 mol% to about 30 mol% structural units of formula 1; and
from about 70 mol% to about 90 mol% structural units of formula 2.
14. A polyethersulfone according to claim 12 , consisting of
from about 15 mol% to about 30 mol% structural units of formula 1; and
from about 70 mol% to about 85 mol% structural units of formula 2.
15. An article comprising a polyethersulfone according to claim 12 .
16. A polyethersulfone according to claim 12 , consisting of from about 10 mol% to about 35 mol% structural units of formula 1A1; and
from greater than about 65 mol% to about 90 mol% structural units of formula 2B.
17. A polyethersulfone according to claim 16 , consisting of
from about 10 mol% to about 30 mol% structural units of formula 1A1; and
from about 70 mol% to about 90 mol% structural units of formula 2B.
18. A polyethersulfone according to claim 16 , consisting of
from about 15 mol% to about 30 mol% structural units of formula 1A; and
from about 70 mol% to about 85 mol% structural units of formula 2.
19. A polyethersulfone according to claim 16 , wherein
said polyethersulfone comprises
from about 10 mol% to about 30 mol% structural units of formula 1, and
from about 70 mol% to about 90 mol% structural units of formula 2; and
said polyether sulfone has a weight average molecular weight of greater than about 45,000 grams per mole as measured by gel permeation chromatography using polystyrene molecular weight standards.
20. An article comprising a polyethersulfone according to claim 19 .
21. A polyethersulfone according to claim 1 , said polyethersulfone consisting of
from about 10 mol% to about 25 mol% structural units of formula 1B
wherein R 4 is C 1 -C 20 aliphatic radical, a C 3 -C 20 cycloaliphatic radical, or a C 3 -C 20 aromatic radical; and
from greater than about 75 mol% to about 90 mol% structural units of formula 2,
wherein the structural units of formula 1B and formula 2 together total 100 mol%.
22. A polyethersulfone according to claim 21 , consisting of
from about 10 mol% to about 15 mol% structural units of formula 1B; and
from about 85 mol% to about 90 mol% structural units of formula 2.
23. An article comprising a polyethersulfone according to claim 21 .
24. A polyethersulfone according to claim 21 , consisting of from about 10 mol% to about 25 mol% structural units of formula 1B1; and
from greater than about 75 mol% to about 90 mol% structural units of formula 2B;
wherein the structural units of formula 1B1 and formula 2B together total 100 mol%.
25. A polyethersulfone according to claim 24 , wherein
said polyethersulfone comprises
from about 10 mol% to about 15 mol% structural units of formula 1; and
from about 85 mol% to about 90 mol% structural units of formula 2; and
said polyether sulfone has a weight average molecular weight of greater than about 45,000 grams per mole as measured by gel permeation chromatography using polystyrene molecular weight standards.
26. An article comprising a polyethersulfone according to claim 25 .