US4853261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of coatings with hydantoin structures by the reaction of compounds containing carbodiimide groups with unsaturated carboxylic acids
Assignee: Bayer AG
•
Filing: 1988-04-13
•
Granted: 1989-08-01
•
Expires: 2008-04-13
Abstract
Abstract The invention relates to a process for the production of coatings based on polymers having a hydantoin structure by reacting blocked polyisocyanate carrying carbodiimide and/or uretone imine groups with α,β-unsaturated diicarboxylic acids or derivatives thereof at 50° to 700° C. said reaction being carried out on the substrate to be coated.
Inventors
- 👤 Willi Dunwald
- 👤 Hans Schlegel
- 👤 Reinhard Halpaap
- 👤 Josef Pedain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:01
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/6755; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/797
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
Process for the production of coatings containing hydantoin rings which comprises reacting at temperatures of from 50° to 700° C. α,β-unsaturated dicarboxylic acids or derivatives thereof selected from the groups consisting of monoalkyl esters having from 1 to 4 carbon atoms in the alkyl moiety and N,N-disubstituted mono-amides substituted by alkyl having 1 to 4 carbon atoms, with blocked polyisocyanates containing carbodiimide and/or uretone imine groups characterized in that the reaction is carried out on the substrate to be coated.
Claim 2
Dependent Claim
80 words
Process for the production of coatings containing hydantoin rings which comprises reacting at temperatures of from 50° to 700° C. α,β-unsaturated dicarboxylic acids or derivatives thereof selected from the groups consisting of monoalkyl esters having from 1 to 4 carbon atoms in the alkyl moiety and N,N-disubstituted mono-amides substituted by alkyl having 1 to 4 carbon atoms, with blocked polyisocyanates containing carbodiimide and/or uretone imine groups characterized in that the reaction is carried out on the substrate to be coated.
Claim 3
Dependent Claim
35 words
The process of claim 1 characterized in that low molecular weight alcohols having a molecular weight of below 400 and from 2 to 4 hydroxyl groups per molecule are also added to the reaction mixture.
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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |