US4418185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for nonaqueous dispersion polymerization of butadiene in the presence of high cis-1,4-polyisoprene as a polymeric dispersing agent
Assignee: Goodyear Tire and Rubber Co
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Filing: 1982-09-20
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Granted: 1983-11-29
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Expires: 2002-09-20
Abstract
Abstract This invention reveals a process for the nonaqueous dispersion polymerization of butadiene monomer in a reaction mixture containing a liquid nonaqueous dispersion medium, the improvement which comprises carrying out the polymerization of the butadiene monomer in the presence of high cis-1,4-polyisoprene to produce very high cis-1,4-polybutadiene.
Inventors
- 👤 Morford C. Throckmorton
- 👤 Paul H. Sandstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:16
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08F279/00; C08F279/02; Y; Y10; Y10S; Y10S526/00; Y10S526/903
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
43 words
A process for the nonaqueous dispersion polymerization of butadiene monomer in a reaction mixture containing a liquid nonaqueous dispersion medium, the improvement which comprises carrying out the polymerization of the butadiene monomer in the presence of high cis-1,4-polyisoprene to produce very high cis-1,4-polybutadiene.
Claim 2
Dependent Claim
43 words
A process for the nonaqueous dispersion polymerization of butadiene monomer in a reaction mixture containing a liquid nonaqueous dispersion medium, the improvement which comprises carrying out the polymerization of the butadiene monomer in the presence of high cis-1,4-polyisoprene to produce very high cis-1,4-polybutadiene.
Claim 3
Dependent Claim
15 words
A process as specified in claim 1 wherein said high cis-1,4-polyisoprene is very high cis-1,4-polyisoprene.
Claim 4
Dependent Claim
32 words
A process as specified in claim 1 wherein said high cis-1,4-polyisoprene is present in an amount between about 2.5 and about 15 parts per hundred parts of said butadiene monomer by weight.
Claim 5
Dependent Claim
30 words
A process as specified in claim 3 wherein said high cis-1,4-polyisoprene is present in an amount between 4 and 10 parts per hundred parts of said butadiene monomer by weight.
Claim 6
Dependent Claim
34 words
A process as specified in claim 1 wherein said butadiene monomer is present in said reaction mixture at a concentration from about 3 to about 30 weight percent based upon the total reaction mixture.
Claim 7
Dependent Claim
34 words
A process as specified in claim 5 wherein said butadiene monomer is present in said reaction mixture at a concentration from about 10 to about 25 weight percent based upon the total reaction mixture.
Claim 8
Dependent Claim
43 words
A process as specified in claim 1 wherein said liquid nonaqueous dispersion medium is at least one member selected from the group consisting of n-butane, isobutane, n-pentane, isopentane, neopentane, 2,2-dimethylbutane, 2,2,-dimethylpentane, 2,4-dimethylpentane, 2,2,4-trimethylpentane, 2,2,3-trimethylbutane, isobutylene, 1-butene, 3-methyl-1-butene, trans-2-butene, 2-methylpentane, 1,1,1,2,2-pentafluoropropane, decafluoropentane, and octafluorobutane.
Claim 9
Dependent Claim
31 words
A process as specified in claim 7 wherein said liquid nonaqueous dispersion medium is at least one member selected from the group consisting of n-butane, n-pentane, isopentane, 2-methylpentane, 2,2-dimethylpentane, and 2,2,4-trimethylpentane.
Claim 10
Dependent Claim
23 words
A process as specified in claim 1 wherein said high cis-1,4-polyisoprene has an inherent viscosity in the range between 2 and 8 dl/g.
Claim 11
Dependent Claim
36 words
A process as specified in claim 1 wherein said reaction mixture comprises a catalyst system comprised of at least one organoaluminum compound, at least one soluble nickel containing compound, and at least one fluorine containing compound.
References Cited (Backward Citations)
US4098980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |