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US4048142A
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Polyetherimides
Assignee: General Electric Co
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Filing: 1975-12-04
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Granted: 1977-09-13
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Expires: 1995-12-04
Abstract
Abstract Polyetherimides are provided and a method for making such materials involving the reaction of organic diamines and 2,2',3,3'-tetracarboxydiphenyl ether dianhydride in the presence of an organic solvent. In instances where a phenolic solvent is employed, useful polyetherimide solutions can be made which can be employed in wire coating applications.
Inventors
- 👤 Tohru Takeoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:24
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064; C08G73/1046; C08G73/1053; C08G73/1067; C08G73/1071; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
Polyetherimides having the formula ##STR8## where R is a divalent organo radical selected from the class consisting of (a) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals, C.sub.(2-8) alkylene terminated polydiorganosiloxane cycloalkylene radicals having from 2-20 carbon atoms, and (c) divalent radicals included by the formula, ##STR9## where Q is a member selected from the class consisting of --O--, ##STR10## --S--, --C x H 2x -- and x is a whole number from 1 to 5 inclusive, m is 0 or 1 and n is an integer equal to from 2 to 2500 inclusive.
Claim 2
Dependent Claim
101 words
Polyetherimides having the formula ##STR8## where R is a divalent organo radical selected from the class consisting of (a) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals, C.sub.(2-8) alkylene terminated polydiorganosiloxane cycloalkylene radicals having from 2-20 carbon atoms, and (c) divalent radicals included by the formula, ##STR9## where Q is a member selected from the class consisting of --O--, ##STR10## --S--, --C x H 2x -- and x is a whole number from 1 to 5 inclusive, m is 0 or 1 and n is an integer equal to from 2 to 2500 inclusive.
Claim 3
Dependent Claim
11 words
A polyetherimide in accordance with claim 1, where R is ##STR11##
Claim 4
Dependent Claim
11 words
A polyetherimide in accordance with claim 1, where R is ##STR12##
Claim 5
Dependent Claim
12 words
A polyetherimide in accordance with claim 1, where R is --(CH.sub.2).sub.6 --
Claim 6
Dependent Claim
117 words
a wire coating formulation comprising a solution of a polyetherimide in a phenolic solvent, where the polyetherimide has the formula, ##STR13## where R is a divalent organo radical selected from the class consisting of (a) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals, C.sub.(2-8) alkylene terminated polydiorganosiloxane cycloalkylene radicals having from 2-20 carbon atoms, and (c) divalent radicals included by the formula, ##STR14## where Q is a member selected from the class consisting of --O--, ##STR15## --S--, --C x H 2x -- and x is a whole number from 1 to 5 inclusive, m is 0 or 1 and n is an integer equal to from 2 to 2500 inclusive.
Claim 7
Dependent Claim
117 words
a wire coating formulation comprising a solution of a polyetherimide in a phenolic solvent, where the polyetherimide has the formula, ##STR13## where R is a divalent organo radical selected from the class consisting of (a) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals, C.sub.(2-8) alkylene terminated polydiorganosiloxane cycloalkylene radicals having from 2-20 carbon atoms, and (c) divalent radicals included by the formula, ##STR14## where Q is a member selected from the class consisting of --O--, ##STR15## --S--, --C x H 2x -- and x is a whole number from 1 to 5 inclusive, m is 0 or 1 and n is an integer equal to from 2 to 2500 inclusive.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |