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US4978738A
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High molecular weight, thermally soluble polyimides
Assignee: Hoechst Celanese Chemical Co
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Filing: 1988-07-12
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Granted: 1990-12-18
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Expires: 2008-07-12
Abstract
Abstract High molecular weight polyimides are formed by polycondensation of 2,2-bis(4-aminophenyl) hexafluoropropane or 2,2-bis(3-aminophenyl) hexafluoropropane with one or more of bis-(3,4 dicarboxyphenyl) ether dianhydride; 3,3', 4,4' benzophenone tetracarboxylic acid dianhydride; 3,3', 4,4' diphenyl tetracarboxylic acid dianhydride and 2,2-bis(3,4 dicarboxyphenyl) hexafluoropropane dianhydride. Generally, the polymers of the present invention are characterized by a molecular weight of more than about 90,000.
Inventors
- 👤 Werner H. Mueller
- 👤 Rohitkumar H. Vora
- 👤 Dinesh N. Khanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1042; C08G73/1039
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
116 words
A high molecular weight soluble polyimide condensation product composition produced from a diamine selected from the group consisting of 2,2-bis (3-aminophenyl) hexafluoropropane, 2,2-bis (4-aminophenyl) hexafluoropropane and mixtures thereof and an equimolar amount of dianhydride consisting essentially of a compound or mixture selected from the group consisting of bis-(3,4 dicarboxyphenyl) ether dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride, and 3,3',4,4' benzophenone tetracarboxylic acid dianhydride, said polyimide optionally containing recurring units of the residue of 2,2-bis (3,4 dicarboxyphenyl) hexafluoropropane dianhydride and wherein said polyimide has a molecular weight of at least about 90,000, a polydispersity of from about 1.7 to about 2.6, thermal stability to at least about 525° C. and an inherent viscosity of at least about 0.8.
Claim 2
Dependent Claim
116 words
A high molecular weight soluble polyimide condensation product composition produced from a diamine selected from the group consisting of 2,2-bis (3-aminophenyl) hexafluoropropane, 2,2-bis (4-aminophenyl) hexafluoropropane and mixtures thereof and an equimolar amount of dianhydride consisting essentially of a compound or mixture selected from the group consisting of bis-(3,4 dicarboxyphenyl) ether dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride, and 3,3',4,4' benzophenone tetracarboxylic acid dianhydride, said polyimide optionally containing recurring units of the residue of 2,2-bis (3,4 dicarboxyphenyl) hexafluoropropane dianhydride and wherein said polyimide has a molecular weight of at least about 90,000, a polydispersity of from about 1.7 to about 2.6, thermal stability to at least about 525° C. and an inherent viscosity of at least about 0.8.
Claim 3
Dependent Claim
19 words
The composition according to claim 1, wherein the polydispersity of said composition is from about 1.9 to about 2.4.
Claim 4
Dependent Claim
15 words
The composition according to claim 2, wherein the polydispersity of said composition is about 2.2.
Claim 5
Dependent Claim
18 words
The composition according to claim 1, wherein the molecular weight of said composition is at least about 120,000.
Claim 6
Dependent Claim
18 words
The composition according to claim 4, wherein the molecular weight of said composition is at least about 150,000.
Claim 7
Dependent Claim
17 words
The composition according to claim 1, wherein said dianhydride component consists essentially of bis-(3,4 dicarboxyphenyl) ether dianhydride.
Claim 8
Dependent Claim
19 words
The composition according to claim 1, wherein said dianhydride component consists essentially of 3,3', 4,4' diphenyl tetracarboxylic acid dianhydride.
Claim 9
Dependent Claim
19 words
The composition according to claim 1, wherein said dianhydride component consists essentially of 3,3', 4,4' benzophenone tetracarboxylic acid dianhydride.
Claim 10
Dependent Claim
20 words
The composition according to claim 1, wherein said dianhydride component consists of an equimolar mixture of two of said dianhydrides.
Claim 11
Dependent Claim
16 words
The composition according to claim 1 in the form of a film affixed to a substrate.
Claim 12
Dependent Claim
123 words
A polymer film consisting essentially of a high molecular weight soluble polyimide condensation product composition produced from a diamine selected from the group consisting of 2,2/-bis (3-aminophenyl) hexafluoropropane, 2,2/-bis (4-aminophenyl) hexafluoropropane and mixtures thereof and an equimolar amount of a dianhydride consisting essentially of a compound or mixture selected from the group ,consisting of bis-(3,4 dicarboxyphenyl) ether dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride, and 3,3',4,4' benzophenone tetracarboxylic acid dianhydride, said polyimide optionally containing recurring units of the residue of 2,2'-bis (3,4 dicarboxyphenyl) hexafluoropropane dianhydride and wherein said polyimide has a molecular weight of at least about 90,000, thermal stability to at least about 525° C., a polydispersity of from about 1.7 to about 2.6 and an inherent viscosity of at least about 0.8.
Claim 13
Dependent Claim
123 words
A polymer film consisting essentially of a high molecular weight soluble polyimide condensation product composition produced from a diamine selected from the group consisting of 2,2/-bis (3-aminophenyl) hexafluoropropane, 2,2/-bis (4-aminophenyl) hexafluoropropane and mixtures thereof and an equimolar amount of a dianhydride consisting essentially of a compound or mixture selected from the group ,consisting of bis-(3,4 dicarboxyphenyl) ether dianhydride, 3,3',4,4' diphenyl tetracarboxylic acid dianhydride, and 3,3',4,4' benzophenone tetracarboxylic acid dianhydride, said polyimide optionally containing recurring units of the residue of 2,2'-bis (3,4 dicarboxyphenyl) hexafluoropropane dianhydride and wherein said polyimide has a molecular weight of at least about 90,000, thermal stability to at least about 525° C., a polydispersity of from about 1.7 to about 2.6 and an inherent viscosity of at least about 0.8.
Claim 14
Dependent Claim
20 words
The polymer film according to claim 11, wherein the polydispersity of said composition is from about 1.9 to about 2.4.
Claim 15
Dependent Claim
16 words
The polymer film according to claim 12, wherein the polydispersity of said composition is about 2.2.
Claim 16
Dependent Claim
19 words
The polymer film according to claim 11, wherein the molecular weight of said composition is at least about 120,000.
Claim 17
Dependent Claim
19 words
The polymer film according to claim 14, wherein the molecular weight of said composition is at least about 150,000.
Claim 18
Dependent Claim
18 words
The polymer film according to claim 11, wherein said dianhydride component consists essentially of bis-(3,4 dicarboxyphenyl) ether dianhydride.
Claim 19
Dependent Claim
20 words
The polymer film according to claim 11, wherein said dianhydride component consists essentially of 3,3', 4,4' diphenyl tetracarboxylic acid dianhydride.
Claim 20
Dependent Claim
20 words
The polymer film according to claim 11, wherein said dianhydride component consists essentially of 3,3', 4,4' benzophenone tetracarboxylic acid dianhydride.
Claim 21
Dependent Claim
21 words
The polymer film according to claim 11, wherein said dianhydride component consists of an equimolar mixture of two of said dianhydrides.
Claim 22
Dependent Claim
22 words
The polymer film according to claim 11, wherein the elongation at break of said film is at least about 10 per cent.
References Cited (Backward Citations)
GB1062435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |