US4808696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making organobis(thioether)s, and products obtained therefrom
Assignee: General Electric Co
•
Filing: 1987-06-01
•
Granted: 1989-02-28
•
Expires: 2007-06-01
Abstract
Abstract A method is provided for making organobis(thioether)s which include bis(thioetherimide)s and bis(thioetheranhydride)s. There is also provided alkylene bis(thioetherimide)s and the corresponding dianhydrides thereof which can be used to make crystalline polyimides.
Inventors
- 👤 Tohru Takekoshi
- 👤 Patricia P. Anderson
- 👤 Thomas L. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:12
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D307/00; C07D307/77; C07D307/87; C07D307/89; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
Crystalline aromatic polyimides having alkylene disulfide groups comprising chemically combined units of the formula, ##STR18## where R 2 is a C.sub.(1-10) divalent alkylene radical, and R 3 is a divalent C.sub.(6-27) aromatic hydrocarbon radical, or a divalent C.sub.(6-27) aromatic hydrocarbon radical substituted with radicals neutral during intercondensation.
Claim 2
Dependent Claim
47 words
Crystalline aromatic polyimides having alkylene disulfide groups comprising chemically combined units of the formula, ##STR18## where R 2 is a C.sub.(1-10) divalent alkylene radical, and R 3 is a divalent C.sub.(6-27) aromatic hydrocarbon radical, or a divalent C.sub.(6-27) aromatic hydrocarbon radical substituted with radicals neutral during intercondensation.
Claim 3
Dependent Claim
11 words
Polyimides in accordance with claim 1, where R 2 is dimethylene.
Claim 4
Dependent Claim
11 words
Polyimides in accordance with claim 1, where R 3 is phenylene.
Claim 5
Dependent Claim
40 words
Aromatic thioethers having the formula, ##STR19## where R 2 is a C.sub.(1-10) divalent alkylene radical, and Q is a member selected from the class consisting of --O-- and ═NR 1 , and R 1 is a C.sub.(1-14) monovalent organo radical.
Claim 6
Dependent Claim
40 words
Aromatic thioethers having the formula, ##STR19## where R 2 is a C.sub.(1-10) divalent alkylene radical, and Q is a member selected from the class consisting of --O-- and ═NR 1 , and R 1 is a C.sub.(1-14) monovalent organo radical.
Claim 7
Dependent Claim
15 words
Aromatic dianhydrides having the formula, ##STR20## where R 2 is a C.sub.(1-10) divalent alkylene radical.
Claim 8
Dependent Claim
15 words
Aromatic dianhydrides having the formula, ##STR20## where R 2 is a C.sub.(1-10) divalent alkylene radical.
Claim 9
Dependent Claim
13 words
An aromatic dianhydride in accordance with claim 5, where R 2 is dimethylene.
Claim 10
Dependent Claim
13 words
An aromatic dianhydride in accordance with claim 5, where R 2 is trimethylene.
Claim 11
Dependent Claim
13 words
An aromatic dianhydride in accordance with claim 5, where R 2 is tetramethylene.
Claim 12
Dependent Claim
43 words
Method for making bis(thioetherimide)s of the formula, ##STR21## which comprises effecting reaction between a phthalimidothiolate having the formula, ##STR22## and organic dihalide of the formula, XRX, where R is a C.sub.(2-10) divalent organo radical, and R 1 is a C.sub.(1-14) monovalent organo radical.
Claim 13
Dependent Claim
43 words
Method for making bis(thioetherimide)s of the formula, ##STR21## which comprises effecting reaction between a phthalimidothiolate having the formula, ##STR22## and organic dihalide of the formula, XRX, where R is a C.sub.(2-10) divalent organo radical, and R 1 is a C.sub.(1-14) monovalent organo radical.
Claim 14
Independent Claim
78 words
A method for making bisthioetherimides having the formula, ##STR23## which comprises (1) effecting reaction between a halophthalimide having the formula, ##STR24## and an alkali metal sulfide having the formula, M.sub.2 S, to form organophthalimidothiolate of the formula, ##STR25## and (2) reacting the organophthalimidothiolate with organic dihalide of the formula, XRX, where R is a C.sub.(2-20) divalent organo radical, R 1 is a C.sub.(1-14) monovalent organo radical, X is a halogen radical, and M is an alkali metal ion.
Claim 15
Independent Claim
78 words
A method for making bisthioetherimides having the formula, ##STR23## which comprises (1) effecting reaction between a halophthalimide having the formula, ##STR24## and an alkali metal sulfide having the formula, M.sub.2 S, to form organophthalimidothiolate of the formula, ##STR25## and (2) reacting the organophthalimidothiolate with organic dihalide of the formula, XRX, where R is a C.sub.(2-20) divalent organo radical, R 1 is a C.sub.(1-14) monovalent organo radical, X is a halogen radical, and M is an alkali metal ion.
References Cited (Backward Citations)
US3933862A
Cited
US3933749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |