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US4429102A
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Novel sulfur-containing polyetherimides
Assignee: General Electric Co
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Filing: 1983-01-10
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Granted: 1984-01-31
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Expires: 2003-01-10
Abstract
Abstract Novel polyetherimides containing sulfone units such as those derived from bis(3,4-dicarboxyphenyl) sulfone dianhydride, as well as units derived from an ether anhydride such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, may be prepared by the reaction of a mixture of said dianhydrides with diamines such as m-phenylene diamine. The polyetherimides have high thermal stability and solvent resistance.
Inventors
- 👤 Thomas L. Evans
- 👤 Marsha M. Grade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:09
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/1053; C08G73/1057; C08G73/1064; C08G73/1067
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A polyetherimide consisting essentially of chemically combined units having the formulas ##STR7## wherein: R 1 is ##STR8## R 2 is an aromatic hydrocarbon radical containing about 6-20 carbon atoms or a halogenated derivative thereof, an alkylene or cycloalkylene radical containing about 2-20 carbon atoms, or a bis-alkylenepoly(dialkylsiloxane) radical; R 3 is ##STR9## and R 4 is a divalent radical derived from benzene or a substituted benzene, diphenyl or a substituted diphenyl, or an unsubstituted or substituted diphenylalkane.
Claim 2
Dependent Claim
77 words
A polyetherimide consisting essentially of chemically combined units having the formulas ##STR7## wherein: R 1 is ##STR8## R 2 is an aromatic hydrocarbon radical containing about 6-20 carbon atoms or a halogenated derivative thereof, an alkylene or cycloalkylene radical containing about 2-20 carbon atoms, or a bis-alkylenepoly(dialkylsiloxane) radical; R 3 is ##STR9## and R 4 is a divalent radical derived from benzene or a substituted benzene, diphenyl or a substituted diphenyl, or an unsubstituted or substituted diphenylalkane.
Claim 3
Dependent Claim
25 words
A polyetherimide according to claim 1 wherein the --SO 2 -- moiety in formula IV is attached to the aromatic rings in the 4-positions thereof.
Claim 4
Dependent Claim
46 words
A polyetherimide according to claim 2 wherein R 4 has one of the following formulas: ##STR10## wherein each R 5 is independently hydrogen or methyl, R 6 is a straight-chain or branched alkylene radical containing 1-5 carbon atoms, and each X is independently hydrogen or halogen.
Claim 5
Dependent Claim
27 words
A polyetherimide according to claim 3 wherein the mole ratio of units of formula I to those of formula II is between about 20:1 and about 1:20.
Claim 6
Dependent Claim
21 words
A polyetherimide according to claim 4 wherein R 4 has formula VII, R 6 is isopropylidene and each X is hydrogen.
Claim 7
Dependent Claim
14 words
A polyetherimide according to claim 5 wherein R 2 is an aromatic hydrocarbon radical.
Claim 8
Dependent Claim
25 words
A polyetherimide according to claim 6 wherein the --O--R 4 --O-- moiety in formula III is attached to the aromatic rings in the 4-positions thereof.
Claim 9
Dependent Claim
11 words
A polyetherimide according to claim 7 wherein R 2 is ##STR11##
Claim 10
Dependent Claim
27 words
A polyetherimide according to claim 8 wherein the mole ratio of units of formula I to those of formula II is between about 9:1 and about 1:2.
Claim 11
Dependent Claim
11 words
A polyetherimide according to claim 9 wherein R 2 is ##STR12##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |