Patent US4064151A successfully refreshed from Google Patents.
US4064151A
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Halosilyl carbamates
Assignee: Adaltis US Inc
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Filing: 1976-05-17
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Granted: 1977-12-20
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Expires: 1996-05-17
Abstract
Abstract Isocyanates are prepared directly from amines in a facile process which involves the reaction with halosilyl compounds to form novel halosilyl carbamates. The isocyanate may then be derived from the carbamate intermediate by gentle heating. In accordance with one aspect of the invention, isocyanates can be formed which contain a further reactive functional moiety, such as hydroxyl, amino, mercapto, nitro, sulfonamido, amido, carboxyl or the like.
Inventors
- 👤 Eddie Hedaya
- 👤 Theodoropulos Spyros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:08
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/04; C07F; C07F7/00; C07F7/02; C07F7/025; C07F7/08; C07F7/18; C07F7/1896; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
Halosilyl carbamates having the formula: RNHCOOSiXY.sub.2 wherein R forms as either an amine or an amine salt a base of sufficient strength to form a carbamate salt with carbon dioxide, X is halogen and Y is a member selected from the group consisting of halogen, hydrogen, lower alkyl, alicyclics, aryl, alkaryl and aralkyl, each having no more than about 10 carbon atoms.
Claim 2
Dependent Claim
62 words
Halosilyl carbamates having the formula: RNHCOOSiXY.sub.2 wherein R forms as either an amine or an amine salt a base of sufficient strength to form a carbamate salt with carbon dioxide, X is halogen and Y is a member selected from the group consisting of halogen, hydrogen, lower alkyl, alicyclics, aryl, alkaryl and aralkyl, each having no more than about 10 carbon atoms.
Claim 3
Dependent Claim
15 words
The halosilyl carbamates of claim 1 wherein R contains at least one reactive, functional group.
Claim 4
Dependent Claim
12 words
The halosilyl carbamates of claim 1 wherein X and Y are halogen.
Claim 5
Dependent Claim
12 words
The halosilyl carbamates of claim 1 wherein X and Y are chlorine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |