Patent US4128566A successfully refreshed from Google Patents.
US4128566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of aluminum polymeric compounds of polyimine nature
Assignee: SnamProgetti SpA
•
Filing: 1977-01-24
•
Granted: 1978-12-05
•
Expires: 1997-01-24
Abstract
Abstract The present specification describes novel aluminum-polyimine compounds that are useful as catalysts for the polymerization of unsaturated compounds. The aluminum-polyimine compounds are of the formula:
Inventors
- 👤 Margherita Corbellini
- 👤 Agostino Balducci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:42
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/10; C07; C07F; C07F5/00; C07F5/06; C07F5/069; C08F; C08F10/00; C08F136/00; C08F136/02; C08F136/04; C08F136/08; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
Process for the preparation of aluminum compounds of the formula Al h (NR) k H i Y j wherein R is a aliphatic, aromatic or cycloaliphatic hydrocarbon radical, H is hydride hydrogen, Y is halogen, k ranges from 2 to 50 h/k>1, (i+j)/h>1, i≠0 and j≧0, said process consisting in reacting aluminum compounds of polyimine nature have the chemical compositions (a) (Al X - NR) n and (b) (X-Al NR) x (XYAl) y (NHR) y in which X and Y are the same or different, and mean hydride hydrogen and/or halogen atoms directly bound to aluminum, n is an integer lower than or equal to 10, y is an integer higher than zero and R is an aliphatic, aromatic or cycloaliphatic hydrocarbon radical, with alkali or alkaline-earth metal alanates or with aluminum hydride complexes.
Claim 2
Dependent Claim
134 words
Process for the preparation of aluminum compounds of the formula Al h (NR) k H i Y j wherein R is a aliphatic, aromatic or cycloaliphatic hydrocarbon radical, H is hydride hydrogen, Y is halogen, k ranges from 2 to 50 h/k>1, (i+j)/h>1, i≠0 and j≧0, said process consisting in reacting aluminum compounds of polyimine nature have the chemical compositions (a) (Al X - NR) n and (b) (X-Al NR) x (XYAl) y (NHR) y in which X and Y are the same or different, and mean hydride hydrogen and/or halogen atoms directly bound to aluminum, n is an integer lower than or equal to 10, y is an integer higher than zero and R is an aliphatic, aromatic or cycloaliphatic hydrocarbon radical, with alkali or alkaline-earth metal alanates or with aluminum hydride complexes.
Claim 3
Dependent Claim
21 words
Process according to claim 1 characterized in that the reaction is carried out at temperatures of from 0° to 70° C.
Claim 4
Dependent Claim
29 words
Process according to claim 1 characterized in that the reaction is carried out in presence of a solvent selected from the group consisting of ethers, hydrocarbons or mixtures thereof.
Claim 5
Dependent Claim
28 words
Process according to claim 1 characterized in that the reaction is carried out at a pressure equal to the vapor pressure of the solvent at the working temperature.
References Cited (Backward Citations)
US3255169A
Cited
US3651064A
Cited
US3781318A
Cited
US4022809A
Cited
US3983150A
Cited
US4032553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |