US4001290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic isocyanate compositions and production thereof
Assignee: Bayer AG
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Filing: 1969-03-12
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Granted: 1977-01-04
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Expires: 1989-03-12
Abstract
Abstract Organic isocyanate compositions are prepared by reacting organic polyisocyanates alone or in the presence of other organic compounds which contain reducible functional groups with catalytically activated hydrogen. New N-formyl-N,N'-disubstituted diisocyanato ureas may be prepared by this method. The products of this invention are particularly useful for producing light fast lacquers, coatings, adhesives, telomers and foam plastics.
Inventors
- 👤 Kuno Wagner
- 👤 Rudolf Braden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1809; C07C273/1818; C07C273/1827; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
37 words
N,-formyl-N,N'-disubstituted diisocyanato urea having the formula: ##STR27## wherein R is the organic radical remaining after the removal of the isocyanato groups from an organic diisocyanate selected from the group consisting of aliphatic, cycloaliphatic, aromatic or araliphatic diisocyanates.
Claim 2
Dependent Claim
37 words
N,-formyl-N,N'-disubstituted diisocyanato urea having the formula: ##STR27## wherein R is the organic radical remaining after the removal of the isocyanato groups from an organic diisocyanate selected from the group consisting of aliphatic, cycloaliphatic, aromatic or araliphatic diisocyanates.
Claim 3
Dependent Claim
68 words
A process for the production of the N-formyl-N,N'-disubstituted diisocyanato urea of claim 1 comprising reacting at a temperature of from about 60° C. to about 200° C. an organic diisocyanate selected from the group consisting of aliphatic, cycloaliphatic, aromatic or araliphatic diisocyanates with hydrogen in the presence of a hydrogenation catalyst from about 1 to about 6 mols of diisocyanate being present for each mol of hydrogen consumed.
Claim 4
Dependent Claim
11 words
The process of claim 2 wherein the polyisocyanate is hexamethylene diisocyanate.
Claim 5
Dependent Claim
11 words
The process of claim 2 wherein the polyisocyanate is m-xylene diisocyanate.
Claim 6
Dependent Claim
12 words
The process of claim 2 wherein the polyisocyanate is a toluylene diisocyanate.
Claim 7
Dependent Claim
18 words
The process of claim 5 wherein the toluylene diisocyanate is an isomeric mixture of 2,4- and 2,6-toluylene diisocyanate.
Claim 8
Dependent Claim
11 words
The process of claim 2 wherein the polyisocyanate is isophorone diisocyanate.
Claim 9
Dependent Claim
18 words
The process of claim 2 wherein the reaction is carried out in the presence of an inert solvent.
Claim 10
Dependent Claim
13 words
The process of claim 2 wherein the hydrogenation catalyst is nickel on kieselguhr.
References Cited (Backward Citations)
US3517039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |