US4654415A
Expired / Lapsed
US
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Method for the preparation of polyimide and polyisoindoloquinazoline dione precursors
Assignee: Siemens AG
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Filing: 1985-03-27
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Granted: 1987-03-31
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Expires: 2005-03-27
Abstract
Abstract Oligomeric and/or polymeric radiation-sensitive polyimide and polyisoindoloquinazoline dione precursors which are soluble in organic solvents, and are of high purity, i.e. in particular chloride-free, are produced simply by first reacting an aromatic and/or heterocyclic tetracarboxylic acid dianhydride with an olefinically unsaturated alcohol to an olefinically unsaturated tetracarboxylic acid diester, and then reacting the latter, in the presence of a carbodiimide, with a diamino compound or a diamino compound having at least one ortho-positioned amino group. The radiation-sensitive precursors thus produced are suitable, for instance, for the production of highly heat-resistant relief structures.
Inventors
- 👤 Hellmut Ahne
- 👤 Eberhard Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0387; C; C08; C08G; C08G73/00; C08G73/06; C08G73/0666; C08G73/0672; C08G73/0683; C08G73/0694; C08G73/10; C08G73/1003; C08G73/1007
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A method for the preparation of oligomeric and/or polymeric radiation-sensitive precursors of polyimides and polyisoindoloquinazoline diones, comprising the steps of reacting an aromatic and/or heterocyclic tetracarboxylic acid dianhydride with an olefinically unsaturated alcohol at about a stoichiometric ratio to produce an olefinically unsaturated tetracarboxylic acid diester, and reacting at about a stoichiometric ratio the tetracarboxylic acid diester with a diamino compound or with a diamino compound having at least one ortho-positioned amido group, in the presence of about a stoichiometric amount of a carbodiimide.
Claim 2
Independent Claim
84 words
A method for the preparation of oligomeric and/or polymeric radiation-sensitive precursors of polyimides and polyisoindoloquinazoline diones, comprising the steps of reacting an aromatic and/or heterocyclic tetracarboxylic acid dianhydride with an olefinically unsaturated alcohol at about a stoichiometric ratio to produce an olefinically unsaturated tetracarboxylic acid diester, and reacting at about a stoichiometric ratio the tetracarboxylic acid diester with a diamino compound or with a diamino compound having at least one ortho-positioned amido group, in the presence of about a stoichiometric amount of a carbodiimide.
Claim 3
Dependent Claim
42 words
A method according to claim 1, wherein the reaction of the tetracarboxylic acid diester with the diamino compound, or with the diamino compound having at least one amido group, is carried out at room temperature, optionally in the presence of a catalyst.
Claim 4
Dependent Claim
38 words
A method according to claim 2, wherein the reaction of the tetracarboxylic acid diester with the diamino compound, or with the diamino compound having at least one amido group, is carried out in the presence of a catalyst.
Claim 5
Dependent Claim
11 words
A method according to claim 1, wherein the carbodiimide is dicyclohexylcarbodiimide.
Claim 6
Dependent Claim
20 words
A method according to claim 1, wherein the tetracarboxylic acid dianhydride is pyromellitic acid anhydride or benzophenone tetracarboxylic acid anhydride.
Claim 7
Dependent Claim
12 words
A method according to claim 1, wherein the diamino compound is 4,4'-diaminodiphenylether.
Claim 8
Dependent Claim
21 words
A method according to claim 1, wherein the diamino compound having at least one amido group is 4,4'-diamino diphenyl-3,3'-dicarboxylic acid amide.
Claim 9
Dependent Claim
16 words
A method according to claim 1 wherein the olefinically unsaturated alcohol is hydroxyethylacrylate or hydroxyethyl methacrylate.
Claim 10
Dependent Claim
66 words
A method for preparation of a protective or insulating layer on a substrate which comprises preparing an oligomeric and/or polymeric, radiation-sensitive precursor of polyimides or a polyisoindoloquinazoline dione by the reaction steps according to claim 1, forming the oligomeric and/or polymeric, radiation-sensitive precursor into a layer on the substrate and irradiating the layer with ultraviolet light to produce the protective or insulating layer on the substrate.
Claim 11
Dependent Claim
14 words
A method according to claim 9 wherein the substrate is an electrical structural part.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |