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US4530985A
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Process for the preparation of polymers comprising conjugated dienes and optionally monoalkenyl aromatic hydrocarbons
Assignee: Kraton Polymers US LLC
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Filing: 1984-08-17
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Granted: 1985-07-23
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Expires: 2004-08-17
Abstract
Abstract Process for the preparation of polymers comprising conjugated dienes and optionally monoalkenyl aromatic hydrocarbons, which process comprises the polymerization of conjugated diene and optionally monoalkenyl aromatic hydrocarbon monomers in the presence of a hydrocarbon diluent, and a hydrocarbyl alkalimetal compound and a Lewis base having the formula ##STR1## wherein R 1 is an alkyl group having 2-18 carbon atoms; R 2 and R 3 are hydrogen or an alkyl groups having 1-4 carbon atoms; R 4 is hydrogen or an alkyl group having 1-6 carbon atoms; and R 5 is an alkyl group having 1-18 carbon atoms.
Inventors
- 👤 Antonius A. Broekhuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:11
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F4/00; C08F4/42; C08F4/44; C08F4/46; C08F4/48
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A process for the preparation of polymers comprising conjugated dienes and optionally monoalkenyl aromatic hydrocarbons, which process comprises polymerizing conjugated diene and optionally monoalkenyl aromatic hydrocarbon monomers in the presence of a hydrocarbon diluent, a hydrocarbyl alkalimetal compound and a Lewis base, wherein the Lewis base is a compound having the formula ##STR5## and wherein R 1 is an alkyl group having 2-18 carbon atoms; R 2 and R 3 are hydrogen or an alkyl groups having 1-4 carbon atoms; R 4 is hydrogen or an alkyl group having 1-6 carbon atoms; and R 5 is an alkyl group having 1-18 carbon atoms.
Claim 2
Dependent Claim
103 words
A process for the preparation of polymers comprising conjugated dienes and optionally monoalkenyl aromatic hydrocarbons, which process comprises polymerizing conjugated diene and optionally monoalkenyl aromatic hydrocarbon monomers in the presence of a hydrocarbon diluent, a hydrocarbyl alkalimetal compound and a Lewis base, wherein the Lewis base is a compound having the formula ##STR5## and wherein R 1 is an alkyl group having 2-18 carbon atoms; R 2 and R 3 are hydrogen or an alkyl groups having 1-4 carbon atoms; R 4 is hydrogen or an alkyl group having 1-6 carbon atoms; and R 5 is an alkyl group having 1-18 carbon atoms.
Claim 3
Dependent Claim
37 words
The process according to claim 1 wherein R 1 is an alkyl group having 3-6 carbon atoms, R 2 and R 3 are hydrogen, and R 4 and R 5 are alkyl groups having 1-4 carbon atoms.
Claim 4
Dependent Claim
27 words
The process according to claim 2 wherein R 1 is n-butyl, R 2 and R 3 are hydrogen, R 4 is methyl and R 5 is isobutyl.
Claim 5
Dependent Claim
19 words
The process according to any of claims 1-3 wherein the process comprises the preparation of homopolymers of conjugated dienes.
Claim 6
Dependent Claim
22 words
The process according to claim 1 wherein the process comprises the preparation of block copolymers of conjugated dienes and monoalkenyl aromatic hydrocarbons.
Claim 7
Dependent Claim
22 words
The process according to claim 1 wherein the process comprises the preparation of random copolymers of conjugated dienes and monoalkenyl aromatic hydrocarbons.
Claim 8
Dependent Claim
15 words
The process according to claim 1 wherein the hydrocarbyl alkalimetal compound is a hydrocarbyllithium compound.
Claim 9
Dependent Claim
14 words
The process according to claim 1 wherein the conjugated diene is isoprene or butadiene.
Claim 10
Dependent Claim
13 words
The process according to claim 1 wherein the monoalkenyl aromatic hydrocarbon is styrene.
Claim 11
Dependent Claim
16 words
The process according to claim 1 wherein subsequent to the polymerization the living polymers are coupled.
Claim 12
Dependent Claim
26 words
The process according to claim 10 wherein the living polymers are coupled by means of dibromoethane, diethyl adipate, CH 3 SiCl 3 or SiCl 4 .
References Cited (Backward Citations)
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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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |