Patent US4029866A successfully refreshed from Google Patents.
US4029866A
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Cationic polymerization catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-01-28
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Granted: 1977-06-14
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Expires: 1992-01-28
Abstract
Abstract High molecular weight polymers and highly unsaturated polymers (e.g. butyl rubber) are prepared by homopolymerizing and copolymerizing olefins, isoolefins, conjugated multiolefins, or mixtures of isoolefins and conjugated multiolefins with a catalyst system comprising an organoaluminum compound in conjunction with a cocatalyst selected from the group consisting of sulfur dioxide, sulfur trioxide, halogens, mixed halogens and hypohalides.
Inventors
- 👤 Joseph P. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:46
CPC Classifications
C; C08; C08F; C08F10/00; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
124 words
A process for preparing polymers of cationically polymerizable olefins which comprises polymerizing said olefins by (1) introducing into the reaction zone about 10.sup. -1 to about 10.sup. -4 mole % based on the moles of olefins to be polymerized of an organoaluminum compound having the general formula AlR 2 X wherein X is a halogen or hydrogen and R is the same or different monovalent radical selected from the group consisting of C 1 -C 12 alkyl, phenyl, C 7 -C 14 aralkyl and C 7 -C 14 alkaryl; and (2) subsequently introducing into the reaction zone a cocatalyst selected from the group consisting of halogens, mixed halogens and hypohalides, the molar ratio of said organoaluminum halide to said activator being greater than 1:1.
Claim 2
Dependent Claim
124 words
A process for preparing polymers of cationically polymerizable olefins which comprises polymerizing said olefins by (1) introducing into the reaction zone about 10.sup. -1 to about 10.sup. -4 mole % based on the moles of olefins to be polymerized of an organoaluminum compound having the general formula AlR 2 X wherein X is a halogen or hydrogen and R is the same or different monovalent radical selected from the group consisting of C 1 -C 12 alkyl, phenyl, C 7 -C 14 aralkyl and C 7 -C 14 alkaryl; and (2) subsequently introducing into the reaction zone a cocatalyst selected from the group consisting of halogens, mixed halogens and hypohalides, the molar ratio of said organoaluminum halide to said activator being greater than 1:1.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the organoaluminum is aluminum diethyl chloride, aluminum dimethyl chloride, aluminum diethyl hydride, aluminum dimethyl bromide, aluminum dibutyl chloride, aluminum diethyl iodide or mixtures thereof.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the ratio of organoaluminum to cocatalyst is in the range of 1000:1 to greater than 1:1.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein the cocatalyst is sulfur dioxide.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein the cocatalyst is chlorine.
Claim 7
Dependent Claim
30 words
The process of claim wherein the cationically polymerizable olefins comprise at least one C 4 to C 8 isoolefin and at least one C 4 to C 10 conjugated multiolefin.
Claim 8
Dependent Claim
39 words
The process of claim 6 wherein the isoolefin is selected from the group consisting of isobutylene, 3-methyl-1-butene, 4-methyl-1-pentene, and 1-ethyl-1-methyl ethylene and the conjugated multiolefin is selected from the group consisting of isoprene, butadiene, piperylene, cyclopentadiene, 2,3-dimethyl-butadiene and cyclohexadiene.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein the reaction is carried out in the absence of refrigeration at self-reflux conditions.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein at least 1 wt. %, based on the monomer, of polar vehicle is incorporated in the reactant mixture.
Claim 11
Dependent Claim
36 words
The process of claim 1 wherein the reaction is carried out in a mixed solvent, said solvent comprising a hydrocarbon solvent and at least 2 wt. % based on the solvent mixture, of a polar vehicle.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein the polymerization is carried out between about +50° C. and about -140° C.
Claim 13
Dependent Claim
24 words
The process of claim 9 wherein the polar vehicle is methyl chloride, chlorobenzene, methyl bromide, ethyl chloride, 1,2-dichlorethane, 1,1-dichloroethane, vinyl chloride or carbon disulfide.
Claim 14
Dependent Claim
24 words
The process of claim 10 wherein the polar vehicle is methyl chloride, chlorobenzene, methyl bromide, ethyl chloride, 1,2-dichloroethane, 1,1-dichloroethane, vinyl chloride or carbon disulfide.
References Cited (Backward Citations)
US3049524A
Cited
US3123592A
Cited
US3349065A
Cited
US3560458A
Cited
US3361725A
Cited
US3426007A
Cited
US3694377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |