US4139490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrocarbyl magnesium and an alkali metal compound catalyst composition for polymerizing conjugated dienes
Assignee: Bridgestone Firestone Inc
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Filing: 1977-11-07
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Granted: 1979-02-13
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Expires: 1997-11-07
Abstract
Abstract The process and catalyst system disclosed herein comprises the polymerization of a conjugated diene such as 1,3-butadiene in hydrocarbon solution in the presence of a new catalyst composition comprising:
Inventors
- 👤 Adel F. Halasa
- 👤 James E. Hall
- 👤 Donald N. Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:10
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/128; B01J31/0215; B01J31/0228; B01J31/122; C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A catalyst composition capable of polymerizing butadiene to a high molecular weight polymer comprising (a) a dihydrocarbyl magnesium compound in which the hydrocarbyl radicals have 1-10 carbon atoms selected from the class consisting of alkyl, carbocyclic aryl and cycloalkyl radicals; and (b) an alkali metal compound of the formula R(SM) n or RC.tbd.CM, wherein M represents Li, Na, or K; R represents a hydrocarbyl radical of 1-10 carbon atoms; and n represents 1, 2, or 3; the concentrations of the respective components giving an Mg/alkali metal molar ratio of 0.01/1 to 100/1.
Claim 2
Dependent Claim
92 words
A catalyst composition capable of polymerizing butadiene to a high molecular weight polymer comprising (a) a dihydrocarbyl magnesium compound in which the hydrocarbyl radicals have 1-10 carbon atoms selected from the class consisting of alkyl, carbocyclic aryl and cycloalkyl radicals; and (b) an alkali metal compound of the formula R(SM) n or RC.tbd.CM, wherein M represents Li, Na, or K; R represents a hydrocarbyl radical of 1-10 carbon atoms; and n represents 1, 2, or 3; the concentrations of the respective components giving an Mg/alkali metal molar ratio of 0.01/1 to 100/1.
Claim 3
Dependent Claim
24 words
The catalyst composition of claim 1 in which the concentrations of the respective components gives an Mg/alkali metal molar ratio of 0.5/1 to 50/1.
Claim 4
Dependent Claim
18 words
The catalyst composition of claim 2 in which said alkali metal compound is an alkali metal hydrocarbyl sulfide.
Claim 5
Dependent Claim
17 words
The catalyst composition of claim 2 in which said alkali metal compound is a lithium alkyl sulfide.
Claim 6
Dependent Claim
17 words
The catalyst composition of claim 2 in which said akali metal compound is a sodium alkyl sulfide.
Claim 7
Dependent Claim
17 words
The catalyst composition of claim 2 in which said alkali metal compound is a potassium alkyl sulfide.
Claim 8
Dependent Claim
15 words
The catalyst composition of claim 3 in which said magnesium compound is a dialkyl magnesium.
Claim 9
Dependent Claim
14 words
The catalyst composition of claim 7 in which said alkyl groups are butyl groups.
Claim 10
Dependent Claim
14 words
The catalyst composition of claim 7 in which said dialkyl groups are amyl groups.
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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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |