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US4183839A
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Polyimide resin-forming composition
Assignee: Individual
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Filing: 1977-10-05
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Granted: 1980-01-15
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Expires: 1997-10-05
Abstract
Abstract Polyimides of the formula ##STR1## Methods of making and polymerizing precursors for such polymers. Coating and adhesive compositions including constituents which can be converted into polyimides with the foregoing structure. Methods of making and using the compositions. Adhesion promoters for such compositions which are reaction products of aromatic dianhydrides and cyclic oxoimines, and methods of producing and using the adhesion promoters.
Inventors
- 👤 John Gagliani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1057; C08G73/1064; C08G73/1067; C08G73/1071; C08G73/1075; C08G73/1082; C09; C09J; C09J179/00; C09J179/04; C09J179/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A process for preparing a polyimide of the formula: ##STR11## wherein A 1 is a divalent aromatic radical selected from the group consisting of ##STR12## A 2 is a tetravalent, aromatic radical of the formula ##STR13## n is a positive integer; which comprises heating a homogeneous solution consisting essentially of an inert solvent and a stoichiometric adduct of the formula: ##STR14## wherein x is 4-6 and A 1 and A 2 each have the above-indicated values to form said polyimide.
Claim 2
Dependent Claim
80 words
A process for preparing a polyimide of the formula: ##STR11## wherein A 1 is a divalent aromatic radical selected from the group consisting of ##STR12## A 2 is a tetravalent, aromatic radical of the formula ##STR13## n is a positive integer; which comprises heating a homogeneous solution consisting essentially of an inert solvent and a stoichiometric adduct of the formula: ##STR14## wherein x is 4-6 and A 1 and A 2 each have the above-indicated values to form said polyimide.
Claim 3
Dependent Claim
33 words
A process according to claim 1, wherein the bisimide is benzophenonetetracarboxylimide-N,N'-pentamethylene-5,5'dicarboxylic acid, the diamine is 4,4'-diaminodiphenyl ether and the solvent is a mixture of equal parts of acetone, dimethyl formamide and methylethyl ketone.
Claim 4
Dependent Claim
17 words
A process according to claim 2, wherein said composition is heated to a temperature of 177°-316° C.
Claim 5
Dependent Claim
27 words
A process according to claim 2, wherein said composition further comprises about 0.1 to 2.5 parts by weight of homogeneously admixed filler per part of imide-forming material.
Claim 6
Dependent Claim
40 words
A process according to claim 4, wherein the filler is an aluminum hydroxide, magnesium oxide, chromium oxide, aluminum phosphate or magnesium phosphate; phosphoric acid, aluminum; copper; steel; a fluorocarbon resin; or a mixture of two or more of the foregoing.
Claim 7
Dependent Claim
42 words
A process according to claim 4, wherein said composition further comprises up to 0.1 parts of an adhesion promoter per molecular part of amine or amine mixture, said adhesion promoter being the reaction product of a dianhydride and a primary amine-terminated silane.
Claim 8
Dependent Claim
19 words
A process according to claim 6, wherein the dianhydride is 3,3',4,4'-benzophenonetetracarboxylic acid dianhydride and the silane is aminopropyltriethoxy silane.
Claim 9
Dependent Claim
10 words
A polyimide obtained according to the process of claim 1.
Claim 10
Dependent Claim
10 words
A polyimide obtained according to the process of claim 4.
Claim 11
Dependent Claim
10 words
A polyimide obtained acording to the process of claim 6.
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |