Patent US4182812A successfully refreshed from Google Patents.
US4182812A
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Process for the preparation of hydantoin lacquers
Assignee: Bayer AG
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Filing: 1977-11-23
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Granted: 1980-01-08
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Expires: 1997-11-23
Abstract
Abstract A process is described for preparing hydantoins by reacting an isocyanate or isothiocyanate having 2 or more isocyanate or isothiocyanate groups with an unsaturated diamide at 0°-450° C. said diamide being a compound of the formula ##STR1## wherein R 1 , R 2 , R 3 , R 4 and R 6 may be the same or different and each is from the group consisting of hydrogen, alkyl of 1-20 carbon atoms, alkenyl or 1-20 carbon atoms, aryl of 4-20 carbon atoms and aralkyl or 7-20 carbon atoms, and R 4 and R 6 together are additionally together a heterocyclic having 3-7 carbon atoms wherein the nitrogen heteroatom is bonded to both R 3 and R 6 , and R 1 and R 2 are also additionally halogen, and x and y each are integers from 1 to 3, with the proviso that at least one of x and y is 1.
Inventors
- 👤 Wilfried Zecher
- 👤 Rudolf Merten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/677; C08G18/678; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/76; C07D233/78; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A process for the preparation of polyhydantoins comprising reacting at a temperature of from 0° to 450° C. an at least bifunctional organic isocyanate or isothiocyanate with an unsaturated diamide of the formula: ##STR12## wherein R 1 , R 2 , R 3 , R 4 and R 6 may be the same or different and each is from the group consisting of hydrogen, alkyl of 1-20 carbon atoms, alkenyl of 1-20 carbon atoms, aryl of 4-20 carbon atoms and aralkyl of 7-20 carbon atoms, and R 4 and R 6 together are additionally a heterocyclic ring having 3-7 carbon atoms wherein the nitrogen heteroatom is bonded to both R 3 and R 6 , and R 1 and R 2 are also additionally halogen, and x and y each are integers from 1 to 3, with the proviso that at least one of x and y is 1.
Claim 2
Dependent Claim
149 words
A process for the preparation of polyhydantoins comprising reacting at a temperature of from 0° to 450° C. an at least bifunctional organic isocyanate or isothiocyanate with an unsaturated diamide of the formula: ##STR12## wherein R 1 , R 2 , R 3 , R 4 and R 6 may be the same or different and each is from the group consisting of hydrogen, alkyl of 1-20 carbon atoms, alkenyl of 1-20 carbon atoms, aryl of 4-20 carbon atoms and aralkyl of 7-20 carbon atoms, and R 4 and R 6 together are additionally a heterocyclic ring having 3-7 carbon atoms wherein the nitrogen heteroatom is bonded to both R 3 and R 6 , and R 1 and R 2 are also additionally halogen, and x and y each are integers from 1 to 3, with the proviso that at least one of x and y is 1.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1, wherein x and y are integers of 1 or 2.
Claim 4
Dependent Claim
17 words
A process as claimed in claim 1, wherein the reaction temperature is from 50° to 250° C.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1 wherein y is 1 and x is 2, and the isocyanate is at least bifunctional.
Claim 6
Dependent Claim
22 words
A process as claimed in claim 1, wherein y is 2 and x is 1 and the isocyanate is at least bifunctional.
Claim 7
Dependent Claim
97 words
A process as claimed in claim 1, wherein the isocyanate is R.sub.5 --(NCO).sub.z or R.sub.5 --(NCS).sub.z wherein R 5 is selected from the group consisting of unsubstituted or substituted alkyl of 1-20 carbon atoms, unsubstituted or substituted cycloalkyl of 5-12 carbon atoms, unsubstituted or substituted aryl of 6-12 carbon atoms and heterocyclic aryl or cycloalkyl of 4-12 carbon atoms wherein the hetero atom is N, O or S and the substituents are selected from the group consisting of halogen, alkyl of 1-6 carbon atoms and aryl of 6-16 carbon atoms, and z is an integer from 2-4.
Claim 8
Dependent Claim
11 words
A polyhydantoin obtained by the process as claimed in claim 1.
Claim 9
Dependent Claim
15 words
A temperature-resistant lacquer, foil, adhesive or moulded product comprising a polyhydantoin according to claim 7.
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) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |