US4247418A
Expired / Lapsed
US
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Polymerization catalyst and process for polymerizing dienes therewith
Assignee: Bridgestone Firestone Inc
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Filing: 1979-10-18
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Granted: 1981-01-27
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Expires: 1999-10-18
Abstract
Abstract The catalyst system disclosed herein comprises a combination or a chelate of a hydrocarbyl lithium compound with a bicyclic amine compound bridged together through nitrogen in each cyclic ring by means of 1-4, preferably 2-4 carbon atoms and each cyclic ring having at least one nitrogen and at least one other heteroatom in its cyclic structure selected from the class consisting of NR, O, S and PR. This catalyst system is particularly useful in the polymerization of vinyl compounds such as ethylene, propylene, styrene, butadiene, etc. The process for the polymerization of conjugated dienes produces polymers of excellent properties. For example, with butadiene-1,3 and other appropriate conditions, polybutadiene with high percentages of syndiotactic crystalline structure may be produced.
Inventors
- 👤 Adel F. Halasa
- 👤 James E. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:29
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04; C08F4/00; C08F4/42; C08F4/44; C08F4/46; C08F4/48
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
A polymerization catalyst comprising: (a) an RLi organo-metal compound in which R is a monovalent hydrocarbyl radical of 1 to 20 carbon atoms, and (b) a bicyclic amine of the formula: ##STR11## wherein D represents RN, O, S or PR; R represents a hydrocarbyl group of 1-20 carbon atoms; A represents a divalent hydrocarbon group having 1-4 carbon atoms between said two valencies; K represents a hydrocarbon group of the formula --CH 2 -- or --CH═; n represents an integer having a value of 1 to 5; and n' represents an integer having a value of 0 to 4 with the sum of n and n' totaling 3-5; the proportion of said bicyclic amine being 0.25 to 10 moles per mole of said organometal compound.
Claim 2
Dependent Claim
125 words
A polymerization catalyst comprising: (a) an RLi organo-metal compound in which R is a monovalent hydrocarbyl radical of 1 to 20 carbon atoms, and (b) a bicyclic amine of the formula: ##STR11## wherein D represents RN, O, S or PR; R represents a hydrocarbyl group of 1-20 carbon atoms; A represents a divalent hydrocarbon group having 1-4 carbon atoms between said two valencies; K represents a hydrocarbon group of the formula --CH 2 -- or --CH═; n represents an integer having a value of 1 to 5; and n' represents an integer having a value of 0 to 4 with the sum of n and n' totaling 3-5; the proportion of said bicyclic amine being 0.25 to 10 moles per mole of said organometal compound.
Claim 3
Dependent Claim
21 words
The catalyst of claim 1 in which the R group in the RLi represents an alkyl radical of 3-6 carbon atoms.
Claim 4
Dependent Claim
16 words
The catalyst of claim 2 in which said A group represents --CH 2 CH 2 --.
Claim 5
Dependent Claim
12 words
The catalyst of claim 2 in which said bicyclic amine is 1,2-di(N-methyl-piperazinyl-N')ethane.
Claim 6
Dependent Claim
12 words
The catalyst of claim 2 in which said bicyclic amine is 1,2-di(pyrazolyl-N-)ethane.
Claim 7
Dependent Claim
12 words
The catalyst of claim 2 in which said bicyclic amine is 1,2-di(morpholino-N-)ethane.
Claim 8
Dependent Claim
12 words
The catalyst of claim 2 in which said bicyclic amine is 1,2-di(thiomorpholino-N-)ethane.
Claim 9
Dependent Claim
12 words
The catalyst of claim 2 in which said bicyclic amine is 1,2-di(thiazolidinyl-N-)ethane.
Claim 10
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(N-methyl-piperazinyl-N'-)ethane.
Claim 11
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(pyrazolyl-N-)ethane.
Claim 12
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(morpholino-N-)ethane.
Claim 13
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(thiomorpholino-N-)ethane.
Claim 14
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(thiazolidinyl-N-)ethane.
Claim 15
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(N-methyl-piperazinyl-N'-)ethane.
Claim 16
Dependent Claim
12 words
The catalyst of claim 1 in which said bicyclic amine is 1,2-di(pyrazolyl-N-)ethane.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |