Patent US3983183A successfully refreshed from Google Patents.
US3983183A
Expired / Lapsed
US
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Production of high-vinyl group, low-molecular weight unsaturated hydrocarbon polymers
Assignee: Huels AG
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Filing: 1974-12-09
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Granted: 1976-09-28
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Expires: 1994-12-09
Abstract
Abstract Low molecular weight polybutadiene, polyisoprene and other hydrocarbon polymers having a high vinyl and a low 1,4-trans-double bond content, which are useful in varnishes and impregnating compositions, are produced employing as catalyst system (a) a cobalt compound; (b) a halogen-containing organoaluminum compound; and (c) an organic phosphite of the formula PR 1 , R 2 , R 3 wherein R 1 , R 2 and R 3 are alkoxy, alkenyloxy or monocyclic aryloxy; and optionally (d) an H-acidic compound, e.g., water.
Inventors
- 👤 Wolfgang Kampf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:31
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C08; C08F; C08F136/00; C07C2531/00; C07C2531/02; C07C2531/04; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22; C07C2531/24; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/945
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
A process for the production of low molecular weight butadiene polymers having a molecular weight distribution of between 1 and 1.5 and whose double bonds are 10-70% vinyl, 30-90% 1,4-cis and 0-10% 1,4-trans, by the polymerization of butadiene, in bulk or in the presence of a solvent, which comprises employing as the catalyst system: a. 0.01 to 0.5 millimole per mole of monomer to be catalyzed of one or both of cobalt octoate and cobalt acetylacetonate; b. a dialkyl aluminum halide in an amount such that the molar ratio of the cobalt in (a) to the aluminum in (b) is from 1:1 to 1:2,000; c. triphenyl phosphite, in a molar ratio to (a) of from 0.3:1 to 10:1; and d. an H-acidic compound in a molar ratio to the aluminum in (b) of up to 1.5:1.
Claim 2
Dependent Claim
136 words
A process for the production of low molecular weight butadiene polymers having a molecular weight distribution of between 1 and 1.5 and whose double bonds are 10-70% vinyl, 30-90% 1,4-cis and 0-10% 1,4-trans, by the polymerization of butadiene, in bulk or in the presence of a solvent, which comprises employing as the catalyst system: a. 0.01 to 0.5 millimole per mole of monomer to be catalyzed of one or both of cobalt octoate and cobalt acetylacetonate; b. a dialkyl aluminum halide in an amount such that the molar ratio of the cobalt in (a) to the aluminum in (b) is from 1:1 to 1:2,000; c. triphenyl phosphite, in a molar ratio to (a) of from 0.3:1 to 10:1; and d. an H-acidic compound in a molar ratio to the aluminum in (b) of up to 1.5:1.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein the H-acidic compound is water.
Claim 4
Dependent Claim
11 words
A process according to claim 1 wherein (a) is cobalt octoate.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein the dialkylaluminum halide is dimethylaluminum chloride, diethylaluminum chloride or diisobutylaluminum chloride.
Claim 6
Dependent Claim
67 words
A process according to claim 1 wherein the catalyst system is a. 0.01 to 0.5 millimoles per mole of monomer to be polymerized of cobalt octoate; b. diethylaluminum chloride, in an amount such that the molar ratio of cobalt in (a) to the aluminum in (b) is from 1:10 to 1:100; c. triphenylphosphite in a molar ratio to (a) of from 0.3:1 to 10:1; and d. water.
Claim 7
Dependent Claim
80 words
A catalyst system for polymerizing conjugated dienes consisting essentially of a. one or both of cobalt octoate and cobalt acetylacetonate; b. a dialkyl aluminum halide in an amount such that the molar ratio of the cobalt in (a) to the aluminum in (b) is from 1:1 to 1:2,000; c. triphenyl phosphite, in a molar ratio to (a) of from 0.3:1 to 10:1, and d. an H-acidic compound in a molar ratio to the aluminum in (b) of up to 1.5:1.
Claim 8
Dependent Claim
80 words
A catalyst system for polymerizing conjugated dienes consisting essentially of a. one or both of cobalt octoate and cobalt acetylacetonate; b. a dialkyl aluminum halide in an amount such that the molar ratio of the cobalt in (a) to the aluminum in (b) is from 1:1 to 1:2,000; c. triphenyl phosphite, in a molar ratio to (a) of from 0.3:1 to 10:1, and d. an H-acidic compound in a molar ratio to the aluminum in (b) of up to 1.5:1.
Claim 9
Dependent Claim
13 words
A catalyst system according to claim 6 wherein the H-acidic compound is water.
Claim 10
Dependent Claim
12 words
A catalyst system according to claim 6 wherein (a) is cobalt octoate.
Claim 11
Dependent Claim
19 words
A catalyst system according to claim 6 wherein the dialkylaluminum halide is dimethylaluminum chloride, diethylaluminum chloride or diisobutylaluminum chloride.
Claim 12
Dependent Claim
54 words
A catalyst system according to claim 6 consisting essentially of a. cobalt octoate; b. diethylaluminum chloride, in an amount such that the molar ratio of cobalt in (a) to the aluminum in (b) is from 1:10 to 1:100; c. triphenylphosphite in a molar ratio to (a) of from 0.3:1 to 10:1; and d. water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |