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US4696994A
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Transparent aromatic polyimide
Assignee: Ube Corp
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Filing: 1985-12-16
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Granted: 1987-09-29
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Expires: 2005-12-16
Abstract
Abstract A transparent aromatic polyimide produced by polymerization and imidation of an aromatic tetracarboxylic acid containing as a principal component biphenyltetracarboxylic acid and an aromatic diamine containing as a principal component bis(aminophenoxy-phenyl)sulfone of the formula (I) or bis(aminophenoxy-phenyl)propane of the formula (II): <IMAGE> (I) <IMAGE> (II)
Inventors
- 👤 Kohei Nakajima
- 👤 Kazuaki Nishio
- 👤 Hiroshi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:23
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/105; C08G73/1057; C08G73/1064
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
42 words
A transparent aromatic polyimide produced by polymerization and imidation of an aromatic tetracarboxylic acid containing as a principal component biphenyltetracarboxylic acid and an aromatic diamine containing as a principal component bis(aminophenoxy-phenyl)sulfone of the formula (I) or bis(aminophenoxy-phenyl)propane of the formula (II): ##STR4##
Claim 2
Dependent Claim
42 words
A transparent aromatic polyimide produced by polymerization and imidation of an aromatic tetracarboxylic acid containing as a principal component biphenyltetracarboxylic acid and an aromatic diamine containing as a principal component bis(aminophenoxy-phenyl)sulfone of the formula (I) or bis(aminophenoxy-phenyl)propane of the formula (II): ##STR4##
Claim 3
Dependent Claim
16 words
The aromatic polyimide claimed in claim 1, wherein the polyimide is in the form of film.
Claim 4
Dependent Claim
27 words
The aromatic polyimide claimed in claim 1 or 2, wherein said aromatic tetracarboxylic acid contains said biphenyltetracarboxylic acid in an amount of not less than 80 mol.%.
Claim 5
Dependent Claim
27 words
The aromatic polyimide claimed in claim 1 or 2, wherein said aromatic diamine contains said bis(aminophenoxy-phenyl)sulfone or bis(aminophenoxy-phenyl)propane in an amount of not less than 80 mol.%.
Claim 6
Dependent Claim
26 words
The aromatic polyimide claimed in claim 1 or 2, wherein said bis(aminophenoxy-phenyl)sulfone or bis(aminophenoxy-phenyl)propane is selected from the group consisting of bis[4-(4'-aminophenoxy)phenyl]sulfone, bis[4-(3'-aminophenoxy)phenyl]sulfone, 2,2-bis[4-(4'-aminophenoxy)phenyl]propane, and 2,2-bis[4-(3'-aminophenoxy)phenyl]propane.
Claim 7
Dependent Claim
52 words
An aromatic polyimide composition containing an aromatic polyimide produced by polymerization and imidation of an aromatic tetracarboxylic acid containing as a principal component biphenyltetracarboxylic acid and an aromatic diamine containing as a principal component bis(aminophenoxy-phenyl)sulfone of the formula (I) or bis(aminophenoxy-phenyl)propane of the formula (II): ##STR5## dissolved in a polar organic solvent.
Claim 8
Dependent Claim
52 words
An aromatic polyimide composition containing an aromatic polyimide produced by polymerization and imidation of an aromatic tetracarboxylic acid containing as a principal component biphenyltetracarboxylic acid and an aromatic diamine containing as a principal component bis(aminophenoxy-phenyl)sulfone of the formula (I) or bis(aminophenoxy-phenyl)propane of the formula (II): ##STR5## dissolved in a polar organic solvent.
Claim 9
Dependent Claim
40 words
The aromatic polyimide composition claimed in claim 6, wherein the polar organic solvent is selected from the group consisting of a sulfoxide type solvent, a formamide type solvent, an acetamide solvent, a pyrrolidone type solvent and an amide type solvent.
Claim 10
Dependent Claim
28 words
The aromatic polyimide composition claimed in claim 6 or 7, wherein said aromatic tetracarboxylic acid contains said biphenyltetracarboxylic acid in an amount of not less than 80 mol.%.
Claim 11
Dependent Claim
28 words
The aromatic polyimide composition claimed in claim 6 or 7, wherein said aromatic diamine contains said bis(aminophenoxy-phenyl)sulfone or bis(aminophenoxy-phenyl)propane in an amount of not less than 80 mol.%.
Claim 12
Dependent Claim
27 words
The aromatic polyimide composition claimed in claim 6 or 7, wherein said bis(aminophenoxy-phenyl)sulfone or bis(aminophenoxy-phenyl)propane is selected from the group consisting of bis[4-(4'-aminophenoxy)phenyl]sulfone, bis[4-(3'-aminophenoxy)phenyl]sulfone, 2,2-bis[4-(4'-aminophenoxy)phenyl]propane, and 2,2-bis[4-(3'-aminophenoxy)phenyl]propane.
Claim 13
Dependent Claim
38 words
The aromatic polyimide composition claimed in claim 7 wherein said solvent is selected from the group consisting of dimethylsulfoxide, diethylsulfoxide, N,N-dimethylformamide, N,N-diethylformamide, N,N-dimethylacetamide, N,N-diethylacetamide, N-methyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, hexamethylenesulfoxide, δ-butyrolactone, phenol, o-cresol, m-cresol, p-cresol, xylenol, p-chorophenol, o-chlorophenol, p-bromophenol and catechol.
Claim 14
Dependent Claim
53 words
The aromatic polyimide claimed in claim 1 wherein said biphenyl tetracarboxylic acid component contains 3,3',4,4'-benzophenonetetracarboxylic acid, the acid anhydride thereof, 2,3,3',4'-benzophenonetetracarboxylic acid, the acid anhydride thereof, pyromelatic acid and the acid anhydride thereof in an amount of not more than 20 mol % of the total amount of said aromatic tetracarboxylic acid component.
Claim 15
Dependent Claim
51 words
The aromatic polyimide claimed in claim 1 wherein said aromatic diamine component contains a member selected from the group consisting of p-phenylenediamine, m-phenylenediamine, 2,4-diaminotoluene, 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane, o-tolidine, 1,4-bis-(4-aminophenoxy)benzene and o-tolidinesulfone in an amount of not more than 20 mol % based on the total amount of the aromatic diamine component.
Claim 16
Dependent Claim
25 words
The aromatic polyimide composition according to claim 6 wherein said aromatic polyimide is present in said solvent in a concentration of about 1-30 wt. %.
Claim 17
Dependent Claim
25 words
The aromatic polyimide composition according to claim 6 wherein said aromatic polyimide is present in said solvent in a concentration of about 3-25 wt. %.
Claim 18
Dependent Claim
21 words
The aromatic polyimide according to claim 1 wherein said biphenyltetracarboxylic acid is 2,3,3'4'-biphenyltetracarboxylic acid dianhydride and said aromatic diamine is bis[4-(4'-aminophenoxy)phenyl]sulfone.
Claim 19
Dependent Claim
21 words
The aromatic polyimide according to claim 1 wherein said biphenyltetracarboxylic acid is 3,3',4,4'-biphenyltetracarboxylic acid dianhydride and said aromatic diamine is bis[4-(4'aminophenoxy)phenyl]sulfone.
Claim 20
Dependent Claim
21 words
The aromatic polyimide according to claim 1 wherein said biphenyltetracarboxylic acid is 2,3,3',4'-biphenyltetracarboxylic acid dianhydride and said aromatic diamine is bis[4-(4'-aminophenoxy)phenyl]propane.
Claim 21
Dependent Claim
21 words
The aromatic polyimide according to claim 1 wherein said biphenyltetracarboxylic acid is 3,3'4,4'-biphenyltetracarboxylic acid dianhydride and said aromatic diamine is bis[4-(4'-aminophenoxy)phenyl]propane.
References Cited (Backward Citations)
US4526838A
Cited
US4568715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |