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US4424353A
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Bicyclic amidines
Assignee: Bayer AG
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Filing: 1981-11-02
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Granted: 1984-01-03
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Expires: 2001-11-02
Abstract
Abstract New amidine/isocyanate adducts are particularly useful as catalysts for hardening epoxy resins, in particular pulverulent coating compositions based on epoxy resins. New bicyclic amidines are excellent starting materials for manufacturing these amidine/isocyanate adducts.
Inventors
- 👤 Rolf-Volker Meyer
- 👤 Hans J. Kreuder
- 👤 Eckhard de Cleur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:29
CPC Classifications
C; C09; C09D; C09D163/00; C07; C07D; C07D239/00; C07D239/70; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4246; C08G59/68; C08G59/686; C08G2150/00; C08G2150/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
Bicyclic amidines of the formula ##STR15## wherein R 1 is a hydrogen or alkyl having from 1 to 4 carbon atoms, and R 2 is a hydrogen, alkyl having from 1 to 18 carbon atoms, cycloalkyl having 5 to 14 carbon atoms, aralkyl having 7 to 16 carbon atoms or aryl having 6 to 20 carbon atoms.
Claim 2
Dependent Claim
57 words
Bicyclic amidines of the formula ##STR15## wherein R 1 is a hydrogen or alkyl having from 1 to 4 carbon atoms, and R 2 is a hydrogen, alkyl having from 1 to 18 carbon atoms, cycloalkyl having 5 to 14 carbon atoms, aralkyl having 7 to 16 carbon atoms or aryl having 6 to 20 carbon atoms.
Claim 3
Dependent Claim
14 words
Amidines according to claim 1 wherein R 1 is a hydrogen or a methyl.
Claim 4
Dependent Claim
13 words
An amidine according to claim 2 selected from the group consisting of: ##STR16##
References Cited (Backward Citations)
US4024259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |