US4185042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling agent
Assignee: Shell USA Inc
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Filing: 1978-08-17
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Granted: 1980-01-22
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Expires: 1998-08-17
Abstract
Abstract Lithium metal-terminated polymers of one or more conjugated dienes and of one or more monoalkenyl arenes are coupled by reaction with a coupling agent of the general formula ##STR1## where the R groups are optionally substituted hydrocarbyl groups, R 1 is hydrogen, R or OR, and R 2 is an optionally substituted alkylene group which may contain one or more oxygen atoms.
Inventors
- 👤 Hendrik T. Verkouw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
A process for the production of a polymer comprising reacting one mole of a living lithium-terminated polymer having the formula P-Li wherein P is selected from the group consisting of polymer chains of one or more alkadienes having 4-12 carbon atoms and copolymer chains of one or more alkadienes having 4-12 carbon atoms and one or more monoalkenyl arenes of 8-18 carbon atoms, having the alkenyl radical attached to an arene ring carbon atom, with from about 0.05 to about 4.0 moles of a coupling agent of the general formula: ##STR4## where the R groups are hydrocarbyl groups selected from the group consisting of alkyl, cycloalkyl, aryl alkaryl or aralkyl groups having from 1 to 20 carbon atoms; R 1 is selected from the group consisting of hydrogen, R and OR; and R 2 is selected from the group consisting of alkylene groups and a group of the formula --R 3 --O--R 4 --wherein R 3 and R 4 are alkylene groups.
Claim 2
Dependent Claim
162 words
A process for the production of a polymer comprising reacting one mole of a living lithium-terminated polymer having the formula P-Li wherein P is selected from the group consisting of polymer chains of one or more alkadienes having 4-12 carbon atoms and copolymer chains of one or more alkadienes having 4-12 carbon atoms and one or more monoalkenyl arenes of 8-18 carbon atoms, having the alkenyl radical attached to an arene ring carbon atom, with from about 0.05 to about 4.0 moles of a coupling agent of the general formula: ##STR4## where the R groups are hydrocarbyl groups selected from the group consisting of alkyl, cycloalkyl, aryl alkaryl or aralkyl groups having from 1 to 20 carbon atoms; R 1 is selected from the group consisting of hydrogen, R and OR; and R 2 is selected from the group consisting of alkylene groups and a group of the formula --R 3 --O--R 4 --wherein R 3 and R 4 are alkylene groups.
Claim 3
Dependent Claim
17 words
A process according to claim 1 where R is a C 1 to C 10 alkyl group.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein R 1 is an OR group.
Claim 5
Dependent Claim
40 words
A process according to claim 1 wherein R 2 has the formula R 3 --O--R 4 where R 3 is a C 1 to C 3 alkyl group and R 4 is a C 1 to C 17 alkyl group.
Claim 6
Dependent Claim
12 words
A process according to claim 2 wherein R is a methyl group.
Claim 7
Dependent Claim
12 words
A process according to claim 1 wherein the coupling agent is gamma-glycidoxypropyl-trimethoxysilane.
Claim 8
Dependent Claim
25 words
A process according to claim 1 wherein said alkadiene is selected from the group consisting of isoprene and butadiene and said monoalkenyl arene is styrene.
Claim 9
Dependent Claim
26 words
A process according to claim 1 wherein P is a polymer chain of one or more alkadienes selected from the group consisting of butadiene and isoprene.
Claim 10
Dependent Claim
26 words
A process according to claim 1 wherein P is a block copolymer of styrene and butadiene with the butadiene block being attached to the lithium ion.
Claim 11
Dependent Claim
9 words
The polymer produced by the process of claim 1.
References Cited (Backward Citations)
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US3470226A
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US3692874A
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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) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |