US4092297A
Expired / Lapsed
US
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Polythioethermides
Assignee: General Electric Co
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Filing: 1974-08-23
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Granted: 1978-05-30
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Expires: 1994-08-23
Abstract
Abstract Polythioetherimides are provided by either effecting reaction between aromatic bis(thioetheranhydride) and organic diamine or by nitro- or halo-displacement from appropriately substituted bis(phthalimide) with anhydrous alkai metal sulfide. The polythioetherimides are heat and flame resistant and can be reinforced with various fillers to produce high performance composites. The polythioetherimides also can be used as wire coating enamels when used in phenolic solvent.
Inventors
- 👤 Frank J. Williams, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:42
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A method of making polythioetherimide which comprises effecting reaction in the presence of a cresol solvent between from 0.5 to 2 moles of aromatic bis(thioetheranhydride) of the formula ##STR14## per mole of organic diamine of the formula, H.sub.2 NRNH.sub.2, at temperatures of from 100° to 250° C, where R 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) diavlent radicals included by the formula, ##STR15## where Q is a member selected from the class consisting of ##STR16## and x is a whole number from 1 to 5 inclusive.
Claim 2
Independent Claim
120 words
A method of making polythioetherimide which comprises effecting reaction in the presence of a cresol solvent between from 0.5 to 2 moles of aromatic bis(thioetheranhydride) of the formula ##STR14## per mole of organic diamine of the formula, H.sub.2 NRNH.sub.2, at temperatures of from 100° to 250° C, where R 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) diavlent radicals included by the formula, ##STR15## where Q is a member selected from the class consisting of ##STR16## and x is a whole number from 1 to 5 inclusive.
Claim 3
Independent Claim
128 words
A method of making polythioetherimide which comprises effecting reaction at a temperature of between about 70° C to about reflux in the presence of a dipolar aprotic solvent between substantially equal molar amounts of a bis-(phthalimide) of the formula ##STR17## M is an alkali metal, X is a displaceable radical selected from nitro and halo and R 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, ##STR18## where Q is a member selected from the class consisting of ##STR19## and x is a whole number from 1 to 5 inclusive.
Claim 4
Independent Claim
128 words
A method of making polythioetherimide which comprises effecting reaction at a temperature of between about 70° C to about reflux in the presence of a dipolar aprotic solvent between substantially equal molar amounts of a bis-(phthalimide) of the formula ##STR17## M is an alkali metal, X is a displaceable radical selected from nitro and halo and R 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, ##STR18## where Q is a member selected from the class consisting of ##STR19## and x is a whole number from 1 to 5 inclusive.
Claim 5
Independent Claim
121 words
A method for making polythioetherimide which comprises stirring the melt of a mixture of from 0.5 to 2 moles of aromatic bis(thioetheranhydride) of the formula ##STR20## per mole of organic diamine of the fomrula H.sub.2 NRNH.sub.2, at a temperature in the range of from 100° to 400° C where R 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, ##STR21## where Q is a member selected from the class consisting of ##STR22## and x is a whole number from 1 to 5 inclusive.
Claim 6
Independent Claim
121 words
A method for making polythioetherimide which comprises stirring the melt of a mixture of from 0.5 to 2 moles of aromatic bis(thioetheranhydride) of the formula ##STR20## per mole of organic diamine of the fomrula H.sub.2 NRNH.sub.2, at a temperature in the range of from 100° to 400° C where R 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, ##STR21## where Q is a member selected from the class consisting of ##STR22## and x is a whole number from 1 to 5 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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |