US3935175A
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Process for the polymerization of unsaturated compounds
Assignee: SnamProgetti SpA
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Filing: 1973-11-19
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Granted: 1976-01-27
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Expires: 1993-11-19
Abstract
Abstract An olefin or diolefin is polymerized, and mixtures thereof are copolymerized, in the presence of a catalyst system consisting of: A. a uranium compound consisting of U(OCH 3 ) 4 , U(OCH 3 ) 3 Cl, U(OC 4 H 9 ) 4 , U(OC 8 H 17 ) 4 , U [N(C 2 H 5 ) 2 ] 4 , U [N(C 2 H 5 ) 2 ] 3 Br, U(OCH 3 ) 5 , U(O-i-C 4 H 9 ) 5 ; b. a reducing compound of a metal belonging to the 2nd or 3rd group of the periodic system, selected from the hydrides, mixed hydrides and alkyl derivatives thereof; C. a Lewis acid selected from AlBr 3 , AlI 3 , AlCl 3 , AlCl 3 .OEt 2 , Al R Cl 2 , B Cl 3 and TiCl 4 , wherein R is a hydrocarbon radical.
Inventors
- 👤 Gabriele Lugli
- 👤 Alessandro Mazzei
- 👤 Gabriella Brandi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:50
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
156 words
Process for the polymerization and copolymerization of unsaturated compounds selected from the group consisting of olefins and diolefins wherein the polymerization reaction is carried out in the presence of a catalyst consisting of a. an uranium compound selected from the group consisting of U(OCH 3 ) 4 , U(OCH 3 ) 3 Cl, U(OC 4 H 9 ) 4 , U(OC 8 H 17 ) 4 , U[N(C 2 H 5 ) 2 ] 4 , U[N(C 2 H 5 ) 2 ] 3 Br, U(OCH 3 ) 5 , U(O-i-C 4 H 9 ) 5 ; b. a reducing compound of a metal belonging to the 2nd or 3rd group of the periodic system selected from the hydrides, mixed hydrides and alkylderivatives thereof; and c. a Lewis acid selected from AlBr 3 , AlI 3 , AlCl 3 .OEt 2 , AlRCl 2 , BCl 3 , TiCl 4 wherein R is a hydrocarbon radical.
Claim 2
Dependent Claim
156 words
Process for the polymerization and copolymerization of unsaturated compounds selected from the group consisting of olefins and diolefins wherein the polymerization reaction is carried out in the presence of a catalyst consisting of a. an uranium compound selected from the group consisting of U(OCH 3 ) 4 , U(OCH 3 ) 3 Cl, U(OC 4 H 9 ) 4 , U(OC 8 H 17 ) 4 , U[N(C 2 H 5 ) 2 ] 4 , U[N(C 2 H 5 ) 2 ] 3 Br, U(OCH 3 ) 5 , U(O-i-C 4 H 9 ) 5 ; b. a reducing compound of a metal belonging to the 2nd or 3rd group of the periodic system selected from the hydrides, mixed hydrides and alkylderivatives thereof; and c. a Lewis acid selected from AlBr 3 , AlI 3 , AlCl 3 .OEt 2 , AlRCl 2 , BCl 3 , TiCl 4 wherein R is a hydrocarbon radical.
Claim 3
Dependent Claim
27 words
Process according to claim 1, wherein the polymerization reaction is carried out at a molar ratio between reducing compound and uranium compound ranging from 5:1 to 200:1.
Claim 4
Dependent Claim
29 words
Process according to claim 1, wherein the polymerization reaction is carried out at a molar ratio between the Lewis acid and the uranium compound ranging from 0.01 to 20.
Claim 5
Dependent Claim
46 words
Process according to claim 1, wherein the polymerization reaction is carried out in the presence of a total amount of catalyst with respect to monomer fed to the reaction ranging from 10 - 6 to 10 - 2 gram atom of uranium compound per monomer mole.
Claim 6
Dependent Claim
33 words
Process according to claim 1, wherein the polymerization reaction is carried out in the presence of a solvent inert with respect to the catalyst, selected from the saturated aliphatic, aromatic and cycloaliphatic hydrocarbons.
Claim 7
Dependent Claim
21 words
Process according to claim 1, wherein the polymerization reaction is carried out at a temperature ranging from -80° to + 100°C.
Claim 8
Dependent Claim
28 words
Process according to claim 1, wherein the polymerization reaction is carried out by starting with a conjugated diolefin, an olefin, a mixture of diolefins or a diolefin-olefin mixture.
Claim 9
Dependent Claim
23 words
Process according to claim 7, wherein the polymerization reaction is carried out by starting with a diolefin selected from butadiene, 1,3-pentadiene, 2,3-dimethyl-butadiene, isoprene.
Claim 10
Dependent Claim
16 words
Process according to claim 7, wherein the polymerization reaction is carried out by starting with ethylene.
Claim 11
Dependent Claim
19 words
Process according to claim 7, wherein the polymerization reaction is carried out by starting with 1,3-pentadiene-butadiene or butadiene-isoprene mixtures.
Claim 12
Dependent Claim
21 words
Process according to claim 7 characterized in that the polymerization reaction is carried out by starting with ethylene-butadiene or ethylene-isoprene mixtures.
Claim 13
Dependent Claim
20 words
Process according to claim 1, wherein the catalytic residuals are removed from the polymer solution by means of a centrifugation.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |