US4076694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polycondensates containing imide groups
Assignee: Bayer AG
•
Filing: 1976-07-27
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Granted: 1978-02-28
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Expires: 1996-07-27
Abstract
Abstract Production of polycondensates coupled by cyclic imide groups by polycondensing an organic polyisocyanate or a masked organic polyisocyanate, a cyclic carboxylic acid anyhydride which is substituted by at least one further cyclic anhydride group, a carboxyl group, an ester group or an SO 3 H group, and a monohydroxyalkyl ether at a temperature of from 0 to 450° C, lacquers produced therefrom and the use of said lacquers for coating substrates. Typical examples of said monohydroxyalkyl ethers include methyl-, isopropyl, cyclohexyl-, benzyl-, phenyl- and methoxyethyl-ethylene glycol or propylenglycol-monoethers.
Inventors
- 👤 Wilfried Zecher
- 👤 Werner Clarenz
- 👤 Rudolf Merten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C08G18/2835; C08G18/30; C08G18/34; C08G18/343; C08G73/00; C08G73/06; C08G73/10; C08G73/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31562
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A product produced by the process of polycondensing at a temperature of from 0° to 450° C a mixture containing an organic polyisocyanate or masked polyisocyanate, a carboxylic acid cyclic anhydride substituted by at least one further cyclic anhydride group, a carboxyl group, an ester group or an SO 3 H group and a monohydroxyalkyl ether, the relative proportions of the organic polyisocyanate or masked polyisocyanate and the substituted carboxylic acid cyclic anhydride being selected so that the reactive groups are present in equivalent amounts or up to an excess of 10% thereof and the monohydroxyalkyl ether being present in an amount of from 0.1 to 40% gram equivalents per gram equivalent of isocyanate.
Claim 2
Dependent Claim
114 words
A product produced by the process of polycondensing at a temperature of from 0° to 450° C a mixture containing an organic polyisocyanate or masked polyisocyanate, a carboxylic acid cyclic anhydride substituted by at least one further cyclic anhydride group, a carboxyl group, an ester group or an SO 3 H group and a monohydroxyalkyl ether, the relative proportions of the organic polyisocyanate or masked polyisocyanate and the substituted carboxylic acid cyclic anhydride being selected so that the reactive groups are present in equivalent amounts or up to an excess of 10% thereof and the monohydroxyalkyl ether being present in an amount of from 0.1 to 40% gram equivalents per gram equivalent of isocyanate.
Claim 3
Dependent Claim
20 words
The product of claim 1 wherein the polycondensation is carried out in the presence of a solvent and/or a catalyst.
Claim 4
Dependent Claim
21 words
The product of claim 1 wherein the monohydroxyalkyl ether is a methyl-, isopropyl-, cyclohexyl-, benzyl-, phenyl- or methoxyethyl-ethylene glycol or propyleneglycolmonoether.
Claim 5
Dependent Claim
56 words
The product of claim 1 wherein the monohydroxyalkyl ether is of the formula R.sub.1 --O--R.sub.2 --OH wherein R is an optionally substituted C 1 -C 20 alkyl, C 4 -C 10 cycloalkyl, C 7 -C 16 aryalkyl or a C 6 -C 14 aryl radical and R 2 is a C 2 -C 20 alkylene radical.
Claim 6
Dependent Claim
11 words
A coating or lacquering composition containing the product of claim 1.
Claim 7
Dependent Claim
11 words
A substrate coated or lacquered with a composition of claim 5.
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |