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US3991004A
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Method for making polyetherimide
Assignee: General Electric Co
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Filing: 1975-01-02
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Granted: 1976-11-09
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Expires: 1995-01-02
Abstract
Abstract A method is provided for making polyetherimides involving the reaction of aromatic bis(etheranhydride)s and organic diamines in the presence of an inert nonpolar organic solvent at temperatures of at least 130° C. The polyetherimides are useful as injection molding compounds.
Inventors
- 👤 Tohru Takekoshi
- 👤 John E. Kochanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:08
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/1053; C08G73/1057; C08G73/1064; C08G73/1067; C08G73/1071
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
64 words
A method for making polyetherimide which comprises 1. refluxing a mixture containing as essential ingredients an aromatic bis(ether anhydride) of the formula ##SPC8## an organic diamine of the formula H.sub.2 NR.sup.1 NH.sub.2 and an inert nonpolar organic solvent at temperatures of from 130° C to 300° C while continuously effecting the removal of water of reaction during the course of polymer formation and 2.
Claim 2
Independent Claim
64 words
A method for making polyetherimide which comprises 1. refluxing a mixture containing as essential ingredients an aromatic bis(ether anhydride) of the formula ##SPC8## an organic diamine of the formula H.sub.2 NR.sup.1 NH.sub.2 and an inert nonpolar organic solvent at temperatures of from 130° C to 300° C while continuously effecting the removal of water of reaction during the course of polymer formation and 2.
Claim 3
Dependent Claim
176 words
separating said polyetherimide at the termination of the reaction from the resulting reaction mixture of (1), consisting essentially of said polyetherimide and said inert nonpolar organic solvent, where R is a member selected from the class consisting of (a) the following divalent organic radicals: ##SPC9## and (b) divalent organic radicals of the general formula ##SPC10## where X is a member selected from the class consisting of divalent radicals of the formulas --C y H 2y --, ##EQU2## --O-- and --S--, where m is 0 or 1, y is a whole number from 1 to 5, and R 1 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, ##SPC11## where Q is a member selected from the class consisting of --O--, ##EQU3## --S--, --C x H 2x -- and x is a whole number from 1 to 5
Claim 4
Dependent Claim
176 words
separating said polyetherimide at the termination of the reaction from the resulting reaction mixture of (1), consisting essentially of said polyetherimide and said inert nonpolar organic solvent, where R is a member selected from the class consisting of (a) the following divalent organic radicals: ##SPC9## and (b) divalent organic radicals of the general formula ##SPC10## where X is a member selected from the class consisting of divalent radicals of the formulas --C y H 2y --, ##EQU2## --O-- and --S--, where m is 0 or 1, y is a whole number from 1 to 5, and R 1 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, ##SPC11## where Q is a member selected from the class consisting of --O--, ##EQU3## --S--, --C x H 2x -- and x is a whole number from 1 to 5
Claim 5
Dependent Claim
41 words
inclusive, and m is as previously defined. 2. A method in accordance with claim 1, where the aromatic bis(etheranhydride) has the formula, ##SPC12## R 2 is selected from ##SPC13## and Q' is selected from the class consisting of --O--, --S--, ##STR4##
Claim 6
Dependent Claim
21 words
A method in accordance with claim 1, where the aromatic bis(etheranhydride) has the formula, ##SPC14## where R 2 is defined above.
Claim 7
Dependent Claim
21 words
A method in accordance with claim 1, where the mixed anhydride has the formula, ##SPC15## where R 2 is defined above.
Claim 8
Dependent Claim
14 words
A method in accordance with claim 1, where the aromatic bis(etheranhydride) is 2,2-bis[4-(3,4-dicarboxyphenoxy)-phenyl]-propane dianhydride.
Claim 9
Dependent Claim
14 words
A method in accordance with claim 1, where the aromatic bis(etheranhydride) is 2,2-bis[4-(2,3-dicarboxyphenoxy)-phenyl]-propane dianhydride.
Claim 10
Dependent Claim
13 words
A method in accordance with claim 1, where the organic diamine is oxydianiline.
Claim 11
Dependent Claim
13 words
A method in accordance with claim 1, where the organic diamine is methylenedianiline.
Claim 12
Dependent Claim
14 words
A method in accordance with claim 1 where the organic diamine is metaphenylene diamine.
Claim 13
Dependent Claim
13 words
A method in accordance with claim 1, where the organic solvent is dichlorobenzene.
Claim 14
Dependent Claim
13 words
A method in accordance with claim 1, where the organic solvent is diphenylether.
Claim 15
Dependent Claim
20 words
A method in accordance with claim 1, where said reaction is conducted in the presence of a mixture of solvents.
Claim 16
Dependent Claim
12 words
A method in accordance with claim 1, where nitrogen atmosphere is employed.
Claim 17
Dependent Claim
15 words
A method in accordance with claim 1, where a mixture of aromatic bis-(etheranhydride)s is employed.
Claim 18
Dependent Claim
15 words
A method in accordance with claim 1, where a mixture of organic diamines is employed.
Claim 19
Dependent Claim
17 words
A method in accordance with claim 1, where the reaction is conducted in the presence of filler.
Claim 20
Dependent Claim
13 words
A method in accordance with claim 1, where the filler is glass fiber.
References Cited (Backward Citations)
US3699075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |