US4397999A
Expired / Lapsed
US
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Polyimidazole and polyimidazopyrrolone precursor stages and the preparation thereof
Assignee: Siemens AG
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Filing: 1980-08-19
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Granted: 1983-08-09
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Expires: 2000-08-19
Abstract
Abstract The present invention relates to oligomeric and/or polymeric precursor stages of polyimidazoles and polyimidazopyrrolones, as well as to a method for preparing these new precursor stages. The invention provides addition products of olefinically unsaturated monoepoxides on amino group-containing polycondensation products of aromatic and/or heterocyclic tetraamino compounds with dicarboxylic-acid chlorides or esters or on amino group-containing polyaddition products of the tetraamino compounds and tetracarboxylic-acid dianhydrides. The radiation-reactive precursor stages according to the invention are suited, for example, for the preparation of highly heat-resistant relief structures.
Inventors
- 👤 Hellmut Ahne
- 👤 Eberhard Kuhn
- 👤 Roland Rubner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:37
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/18; C08G73/20; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0387; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31725
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A polymeric polyimidazole precursor comprising the reaction product of (a) an olefinically unsaturated 1,2-monoepoxide and (b) an amino group-containing polycondensation product of (1) a member selected from the group consisting of an aromatic tetraamino compound and a heterocyclic tetraamino compound and (2) a member selected from the group consisting of a dicarboxylic acid chloride and an ester of a dicarboxylic acid.
Claim 2
Dependent Claim
61 words
A polymeric polyimidazole precursor comprising the reaction product of (a) an olefinically unsaturated 1,2-monoepoxide and (b) an amino group-containing polycondensation product of (1) a member selected from the group consisting of an aromatic tetraamino compound and a heterocyclic tetraamino compound and (2) a member selected from the group consisting of a dicarboxylic acid chloride and an ester of a dicarboxylic acid.
Claim 3
Dependent Claim
23 words
The polyimidazole precursor according to claim 1 wherein the unsaturated monoepoxide is selected from the group consisting of glycidyl acrylate and glycidyl methacrylate.
Claim 4
Dependent Claim
23 words
The polyimidazole precursor according to claim 1 wherein said amino group-containing polycondensation product is the polycondensation product of diaminobenzidine and isophthalic-acid dimethyl ester.
Claim 5
Independent Claim
93 words
A method for the preparation of a polyimidazole precursor comprising reacting (1) a member selected from the group consisting of an aromatic tetraamino compound and a heterocyclic tetraamino compound with (2) a member selected from the group consisting of a dicarboxylic acid chloride and an ester of a dicarboxylic acid to form an amino group-containing reaction product; and reacting said amino group-containing reaction product with an olefinically unsaturated 1,2-monoepoxide in an organic solvent at a temperature in the range of from about room temperature to a temperature of up to about 100° C.
Claim 6
Independent Claim
93 words
A method for the preparation of a polyimidazole precursor comprising reacting (1) a member selected from the group consisting of an aromatic tetraamino compound and a heterocyclic tetraamino compound with (2) a member selected from the group consisting of a dicarboxylic acid chloride and an ester of a dicarboxylic acid to form an amino group-containing reaction product; and reacting said amino group-containing reaction product with an olefinically unsaturated 1,2-monoepoxide in an organic solvent at a temperature in the range of from about room temperature to a temperature of up to about 100° C.
Claim 7
Dependent Claim
19 words
A plastic coating for the optical fibers of a light waveguide comprised of the polyimidazole precursor of claim 1.
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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |