US4182813A
Expired / Lapsed
US
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Process for the preparation of 1,2-polybutadiene
Assignee: JSR Corp
•
Filing: 1978-05-15
•
Granted: 1980-01-08
•
Expires: 1998-05-15
Abstract
Abstract A process for preparing crystalline 1,2-polybutadiene by contacting 1,3-butadiene with a catalyst consisting of (A) a cobalt compound, (B) an organoaluminum compound, (C) water in an amount of 0.25 to 1.5 mole per mol of said organoaluminum compound, and (D) an organic phosphorus compound in a halogenated hydrocarbon solvent to polymerize the butadiene, characterized in that as said organic phosphorus compound there is used a compound represented by the formula: ##STR1## wherein R 1 is an alkyl or aryl group, and R 2 and R 3 represent independently hydrogen, or alkyl or aryl groups. This process can produce 1,2-polybutadiene having a degree of crystallization of 25 to 50% in a high yield at a temperature of from 0° to 30° C.
Inventors
- 👤 Kenya Makino
- 👤 Koei Komatsu
- 👤 Yasumasa Takeuchi
- 👤 Masayuki Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:36
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
95 words
A process for producing crystalline 1,2-polybutadiene by contacting 1,3-butadiene with a catalyst composed of (A) a cobalt compound, (B) an organoaluminum compound, (C) water in an amount of 0.25 to 1.5 mols per mol of said organoaluminum compound, and (D) an organic phosphorus compound in a halogenated hydrocarbon solvent to polymerize the butadiene, characterized in that as said organic phosphorus compound there is used a compound represented by the general formula: ##STR4## wherein R 1 is an alkyl or aryl group, and R 2 and R 3 represent independently hydrogen or alkyl or aryl groups.
Claim 2
Dependent Claim
95 words
A process for producing crystalline 1,2-polybutadiene by contacting 1,3-butadiene with a catalyst composed of (A) a cobalt compound, (B) an organoaluminum compound, (C) water in an amount of 0.25 to 1.5 mols per mol of said organoaluminum compound, and (D) an organic phosphorus compound in a halogenated hydrocarbon solvent to polymerize the butadiene, characterized in that as said organic phosphorus compound there is used a compound represented by the general formula: ##STR4## wherein R 1 is an alkyl or aryl group, and R 2 and R 3 represent independently hydrogen or alkyl or aryl groups.
Claim 3
Dependent Claim
24 words
The process according to claim 1, wherein R 1 , R 2 and R 3 in the general formula are alkyl or aryl groups.
Claim 4
Dependent Claim
24 words
The process according to claim 2, wherein R 1 , R 2 and R 3 are alkyl groups having 1 to 6 carbon atoms.
Claim 5
Dependent Claim
15 words
The process according to claim 1, wherein R 2 in the general formula is hydrogen.
Claim 6
Dependent Claim
19 words
The process according to claim 4, wherein R 1 and R 3 in the general formula are alkyl groups.
Claim 7
Dependent Claim
16 words
The process according to claim 5, wherein the alkyl group has 1 to 6 carbon atoms.
Claim 8
Dependent Claim
25 words
The process according to claim 1, wherein R 1 in the general formula is an alkyl group and R 2 and R 3 are hydrogen.
Claim 9
Dependent Claim
16 words
The process according to claim 7, wherein the alkyl group has 1 to 6 carbon atoms.
Claim 10
Dependent Claim
25 words
The process according to claim 1, wherein R 1 in the general formula is an aryl group and R 2 and R 3 are hydrogen.
Claim 11
Dependent Claim
12 words
The process according to claim 9, wherein the aryl group is phenyl.
Claim 12
Dependent Claim
32 words
The process according to claim 1, wherein the organic phosphorus compound is selected from the group consisting of tri-3-methylphenyl)phosphine, tri-3-ethylphenyl)phosphine, tri-3-isopropylphenyl)phosphine, tri-3-t-butylphenyl)phosphine, tri-3-phenylphenyl)phosphine, tri-3,5-dimethylphenyl)phosphine, tri-3,5-diethylphenyl)phosphine, tri-3,4-dimethylphenyl)phosphine, tri-3-methyl-5-ethylphenyl)phosphine, tri-3,4,5-trimethylphenyl)phosphine, tri-3-methyl-4-phenylphenyl)phosphine, tri-3-methyl-5-phenylphenyl)phosphine and tri-3-ethyl-5-phenylphenyl)phosphine.
Claim 13
Dependent Claim
15 words
The process according to claim 1, wherein the organic phosphorus compound is tri-3-methylphenyl)phosphine or tri-3,5-dimethylphenyl)phosphine.
Claim 14
Dependent Claim
22 words
The process according to claim 11, wherein the organic phosphorus compound is in the form of a complex with a cobalt compound.
Claim 15
Dependent Claim
23 words
The process according to claim 13, wherein the complex is a cobalt bromide-tri-3-methylphenyl)phosphine complex, a cobalt bromide-tri-3-phenylphenyl)phosphine complex, or a cobalt bromide-tri-3,5-dimethylphenyl)phosphine complex.
Claim 16
Dependent Claim
19 words
The process according to claim 1, wherein the polymerization temperature is within the range of -50° to 100° C.
Claim 17
Dependent Claim
19 words
The process according to claim 1, wherein the polymerization temperature is within the range of 0° to 30° C.
Claim 18
Dependent Claim
20 words
The process according to claim 16, wherein a 1,2-polybutadiene with a degree of crystallization of 25 to 50% is produced.
Claim 19
Dependent Claim
28 words
The process according to claim 1, 15 or 16, wherein the amount of the organic phosphorus compound is more than 0.5 mols per mol of the cobalt compound.
Claim 20
Dependent Claim
25 words
The process according to claim 18, wherein the amount of the organic phosphorus compound is 0.5 to 50 mols per mol of the cobalt compound.
Claim 21
Dependent Claim
28 words
The process according to claim 19, wherein the amount of the catalyst used is 0.001 to 1 mmol in terms of the cobalt compound per mol of 1,3-butadiene.
References Cited (Backward Citations)
US3498963A
Cited
US3778424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |