US4083834A
Expired / Lapsed
US
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Process for producing polymer having functional groups at its chain terminals
Assignee: JSR Corp
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Filing: 1975-08-18
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Granted: 1978-04-11
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Expires: 1995-08-18
Abstract
Abstract A process for producing a polymer having functional groups at its chain terminals, which comprises reacting a polymer having alkali metal atoms at its chain terminals with an alkylene oxide or sulfide in a hydrocarbon medium having a solubility parameter of 7.2 or less at 25° C. This process makes it possible to produce the said polymer in a short period of time without necessitating a large power for agitation. According to this process, there can be produced a polymer having a functionality near the theoretical functionality in a short period of time.
Inventors
- 👤 Koei Komatsu
- 👤 Akinori Nishioka
- 👤 Noboru Ohshima
- 👤 Masanobu Takahashi
- 👤 Hiromichi Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:59
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
111 words
A process for producing a conjugated diene polymer having functional groups at its chain terminals, prepared by polymerization of at least one conjuaged diene, with or without an alkenylaromatic monomer, in the presence of lithium metal or a dilithioorganic compound at a temperature of 0° to 100° C., to form a base polymer having lithium metal atoms at its chain terminals and reacting same with an alkylene oxide or alkylene sulfide, characterized in that the reaction of the base polymer and alkylene oxide or sulfide is effected in a hydrocarbon medium in which the modified polymer is insoluble, said medium having a solubility parameter of 7.2 or less at 25° C.
Claim 2
Dependent Claim
111 words
A process for producing a conjugated diene polymer having functional groups at its chain terminals, prepared by polymerization of at least one conjuaged diene, with or without an alkenylaromatic monomer, in the presence of lithium metal or a dilithioorganic compound at a temperature of 0° to 100° C., to form a base polymer having lithium metal atoms at its chain terminals and reacting same with an alkylene oxide or alkylene sulfide, characterized in that the reaction of the base polymer and alkylene oxide or sulfide is effected in a hydrocarbon medium in which the modified polymer is insoluble, said medium having a solubility parameter of 7.2 or less at 25° C.
Claim 3
Dependent Claim
18 words
A process according to claim 1, wherein the polymer has a number-average molecular weight of 500 to 50,000.
Claim 4
Dependent Claim
31 words
A process according to claim 1, wherein the hydrocarbon is selected from the group consisting of paraffinic or olefinic hydrocarbons having a solubility parameter of 7.2 or lower at 25° C.
Claim 5
Dependent Claim
28 words
A process according to claim 1, wherein the hydrocarbon is selected from the group consisting of propane, n-butane, isobutane, 1-butene, cis-2-butene, trans-2-butene, isobutene, n-pentane, isopentane, neopentane, and 2,2,4-trimethylpentane.
Claim 6
Dependent Claim
26 words
A process according to claim 1, wherein the amount of the hydrocarbon is 0.5 to 20 parts by weight per part by weight of the polymer.
Claim 7
Dependent Claim
25 words
A process according to claim 1, wherein the amount of the hydrocarbon is 2 to 10 parts by weight per part by weight of polymer.
Claim 8
Dependent Claim
13 words
The process according to claim 1, wherein the hydrocarbon is 2,2,4-trimethylpentane or isopentane.
Claim 9
Dependent Claim
57 words
A process according to claim 1, wherein the polymer having lithium metal atoms at its chain terminals is a polymer or copolymer obtained by polymerization of at least one conjugated diene or a mixture of a conjugated diene and an alkenyl aromatic compound by use of an lithium metal or an organic lithium metal compound as initiator.
Claim 10
Dependent Claim
34 words
A process according to claim 8, wherein the intiator is at least one member selected from the group consisting of lithium, butyllithium, allyllithium, phenyllithium, 1,4-dilithiobutane, 1,5-dilithiopentane, 1,10-dilithiodecane, 1,4-dilithio-2-butene, 1,4-dilithio-2-methyl-2-butene, dilithionaphthalene, dilithiomethylnaphthalene, 1,4-dilithio-1,1,4,4-tetraphenylbutane, and bis(1-lithio-3-methylpentyl)benzene.
Claim 11
Dependent Claim
11 words
A process according to claim 8, wherein the initiator is 1,4-dilithiobutane.
Claim 12
Dependent Claim
24 words
A process according to claim 8, wherein at least one conjugated diene selected from the group consisting of 1,3-butadiene, isoprene, and 2,3-dimethylbutadiene is polymerized.
Claim 13
Dependent Claim
42 words
A process according to claim 8, wherein a mixture of a conjugated diene selected from the group consisting of 1,3-butadiene, isoprene, and 2,3-dimethylbutadiene; and an alkenyl aromatic hydrocarbon compound selected from the group consisting of styrene, α-methylstyrene, vinyltoluene, and vinylnaphthalene is polymerized.
Claim 14
Dependent Claim
19 words
A process according to claim 8, wherein 1,3-butadiene or isoprene or a mixture of 1,3-butadiene and styrene is polymerized.
Claim 15
Dependent Claim
37 words
A process according to claim 8, wherein the amount of the initiator is 1 to 1,000 millimoles per 100 g of a conjugated diene or a mixture of a conjugated diene and an alkenyl aromatic hydrocarbon compound.
Claim 16
Dependent Claim
38 words
A process according to claim 1, wherein the alkylene oxide or the alkylene sulfide is selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, styrene oxide, trimethylene oxide, ethylene sulfide, propylene sulfide, and trimethylene sulfide.
Claim 17
Dependent Claim
20 words
A process according to claim 1, wherein the alkylene oxide or the alkylene sulfide is ethylene oxide or ethylene sulfide.
Claim 18
Dependent Claim
33 words
A process according to claim 1, wherein the amount of the alkylene oxide or the alkylene sulfide is 1 to 100 moles per gram atom of the lithium metal contained in the polymer.
Claim 19
Dependent Claim
33 words
A process according to claim 1, wherein the amount of the alkylene oxide or the alkylene sulfide is 3 to 50 moles per gram atom of the lithium metal contained in the polymer.
Claim 20
Dependent Claim
20 words
A process according to claim 9, wherein the polymerization is carried out at a temperature of 0° to 100° C.
Claim 21
Dependent Claim
20 words
A process according to claim 1, wherein the reaction is carried out at a temperature of -50° to +150° C.
Claim 22
Dependent Claim
20 words
A process according to claim 1, wherein the reaction is carried out at a temperature of -30° to +70° C.
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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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |