US3933749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polythioetherimides and method of preparation
Assignee: General Electric Co
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Filing: 1974-08-23
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Granted: 1976-01-20
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Expires: 1994-08-23
Abstract
Abstract Polythioetherimides are provided and a method for making such materials. Aromatic bis(thioetheranhydride)s are reacted with organic diamine in the presence of organic solvent, or in the melt. The polythioetherimides are injection moldable thermoplastics which can be used to make high performance composites.
Inventors
- 👤 Frank J. Williams, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:10
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
Polythioetherimide consisting essentially of chemically combined units of the formula ##SPC20## where R is a divalent aromatic organic radical having from 6-30 carbon atoms and R 1 is a divalent organic radical selected from the class consisting of (a) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals and cycloalkylene radicals having from 2-20 carbon atoms, C.sub.(2 -8 ) alkylene terminated polydiorganosiloxane, and (c) divalent radicals included by the formula, ##SPC21## where Q is a member selected from the class consisting of divalent radicals of the formulas, --C y H 2y --, ##EQU2## --O--, and --S--, and y is a whole number from 1 to 5 inclusive.
Claim 2
Dependent Claim
113 words
Polythioetherimide consisting essentially of chemically combined units of the formula ##SPC20## where R is a divalent aromatic organic radical having from 6-30 carbon atoms and R 1 is a divalent organic radical selected from the class consisting of (a) aromatic hydrocarbon radicals having from 6-20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals and cycloalkylene radicals having from 2-20 carbon atoms, C.sub.(2 -8 ) alkylene terminated polydiorganosiloxane, and (c) divalent radicals included by the formula, ##SPC21## where Q is a member selected from the class consisting of divalent radicals of the formulas, --C y H 2y --, ##EQU2## --O--, and --S--, and y is a whole number from 1 to 5 inclusive.
Claim 3
Dependent Claim
16 words
Polythioetherimide in accordance with claim 1, consisting essentially of chemically combined units of the formula, ##SPC22##
Claim 4
Dependent Claim
16 words
Polythioetherimides in accordance with claim 1, consisting essentially of chemically combined units of the formula, ##SPC23##
Claim 5
Dependent Claim
15 words
Polythioetherimides in accordance with claim 1, consisting essentially of a mixture of units of ##SPC24##
Claim 6
Dependent Claim
10 words
Polythioetherimide in accordance with claim 1, where R is ##SPC25##
Claim 7
Dependent Claim
10 words
Polythioetherimide in accordance with claim 1, where R is ##SPC26##
Claim 8
Dependent Claim
10 words
Polythioetherimide in accordance with claim 1, where R is ##SPC27##
Claim 9
Dependent Claim
10 words
Polythioetherimide in accordance with claim 1, where R is ##SPC28##
Claim 10
Dependent Claim
11 words
Polythioetherimide in accordance with claim 1, where R 1 is ##SPC29##
Claim 11
Dependent Claim
10 words
Polythioetherimide in accordance with claim 1, where R' is ##SPC30##
Claim 12
Dependent Claim
10 words
Polythioetherimide in accordance with claim 1, where R' is ##SPC31##
Claim 13
Dependent Claim
66 words
A process which comprises effecting the removal of water of reaction from the melt of a mixture by agitation, by stripping under reduced pressure, or by purging with an inert gas which mixture contains an essential ingredients 1. aromatic bis(thioetheranhydride) of the formula, ##SPC32## 2. organic diamine of the formula NH.sub.2 R.sup.1 NH.sub.2 where R and R 1 are as previously defined as in claim 1.
Claim 14
Dependent Claim
81 words
A process which comprises 1. effecting reaction under anhydrous conditions at a temperature in the range of from 25° to 150°C between a bis nitrophthalimide of the formula ##SPC33## in the presence of a dipolar aprotic organic solvent with a dithiophenoxide salt of the formula, M--S--R--S--M, where R and R 1 are as previously defined as in claim 1, M is an alkali metal and X is a displaceable radical selected from the class consisting of nitro, chloro, fluoro and bromo.
References Cited (Backward Citations)
US3787364A
Cited
US3838097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |