US4102801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making polyamine carbamates
Assignee: EIDP Inc
•
Filing: 1977-03-24
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Granted: 1978-07-25
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Expires: 1997-03-24
Abstract
Abstract Solventless process of reacting polyamine having two primary amino groups adsorbed on a particulate carrier with carbon dioxide to obtain the free-flowing corresponding polyamine carbamate-carrier mixture.
Inventors
- 👤 Nicolas Brodoway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:02
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/02; C07C271/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
118 words
In a process for preparing a polyamine carbamate which comprises reacting an aliphatic or cycloaliphatic polyamine having 2-14 carbon atoms and two primary amino groups with gaseous carbon dioxide, the improvement which comprises mixing said polyamine and a particulate carrier capable of adsorbing the polyamine and selected from the group consisting of an inorganic material inert to the reaction of polyamine with carbon dioxide or a polyamine carbamate that is the same as the carbamate being produced and reacting the polyamine on the carrier with at least 1 mole carbon dioxide per mole polyamine in the absence of solvent for the reactants at a temperature less than about 90° C to obtain the free-flowing, corresponding polyamine carbamate-carrier mixture.
Claim 2
Dependent Claim
118 words
In a process for preparing a polyamine carbamate which comprises reacting an aliphatic or cycloaliphatic polyamine having 2-14 carbon atoms and two primary amino groups with gaseous carbon dioxide, the improvement which comprises mixing said polyamine and a particulate carrier capable of adsorbing the polyamine and selected from the group consisting of an inorganic material inert to the reaction of polyamine with carbon dioxide or a polyamine carbamate that is the same as the carbamate being produced and reacting the polyamine on the carrier with at least 1 mole carbon dioxide per mole polyamine in the absence of solvent for the reactants at a temperature less than about 90° C to obtain the free-flowing, corresponding polyamine carbamate-carrier mixture.
Claim 3
Dependent Claim
21 words
A process of claim 1 wherein the carrier is a polyamine carbamate that is the same as the carbamate being produced.
Claim 4
Dependent Claim
21 words
A process of claim 1 wherein the carrier is an inorganic material inert to the reaction of polyamine with carbon dioxide.
Claim 5
Dependent Claim
10 words
A process of claim 3 wherein the carrier is silica.
Claim 6
Dependent Claim
11 words
A process of claim 3 wherein the carrier is magnesium carbonate.
Claim 7
Dependent Claim
11 words
A process of claim 3 wherein the carrier is calcium carbonate.
Claim 8
Dependent Claim
11 words
A process of claim 2 wherein the carrier is 1,2-diaminopropane carbamate.
Claim 9
Dependent Claim
11 words
A process of claim 2 wherein the carrier is methylenebis(4-cyclohexylamine) carbamate.
Claim 10
Dependent Claim
10 words
A process of claim 1 wherein the polyamine is 1,2-diaminopropane.
Claim 11
Dependent Claim
10 words
A process of claim 1 wherein the polyamine is 1,6-diaminohexane.
Claim 12
Dependent Claim
10 words
A process of claim 1 wherein the polyamine is 4,4-methylenebis(4-cyclohexylamine).
Claim 13
Dependent Claim
10 words
A process of claim 1 wherein the polyamine is methylimino-bis-propylamine.
Claim 14
Dependent Claim
30 words
A process of claim 1 wherein the reaction is carried out in the presence of an anti-dusting agent for the resulting carbamate that is a hydrocarbon oil or fibrillated poly(tetrafluoroethylene).
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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |