Patent US4408017A successfully refreshed from Google Patents.
US4408017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling process
Assignee: Kraton Polymers US LLC
•
Filing: 1982-05-26
•
Granted: 1983-10-04
•
Expires: 2002-05-26
Abstract
Abstract Lithium metal-terminated polymers of one or more alkadienes and of one or more monoalkenyl arenes are coupled by reaction with a coupling agent which has the general formula ##STR1## where X is hydrogen, halogen or an alkyl group and Y is halogen or an alkoxy group.
Inventors
- 👤 Michael K. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:34
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
A process for preparing a polymer comprising reacting 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 conjugated alkadienes having 4-12 carbon atoms and copolymer chains of one or more conjugated 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 a coupling agent in a reaction zone, which agent has the general formula ##STR6## where n is 0 or an integer from 1 to 10, and where each "X" is selected from the group consisting of hydrogen, a halogen or an alkyl radical having from 1 to 10 carbon atoms, each "Y" is selected from the group consisting of a halogen and --OR where "R" is an alkyl group having from 1 to 10 carbon atoms, "a" is zero or an integer selected from the group consisting of 1 and 2, and "b" is an integer equal to 3 minus "a", and where the halogen is selected from the group consisting of chlorine, fluorine, bromine and iodine.
Claim 2
Dependent Claim
189 words
A process for preparing a polymer comprising reacting 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 conjugated alkadienes having 4-12 carbon atoms and copolymer chains of one or more conjugated 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 a coupling agent in a reaction zone, which agent has the general formula ##STR6## where n is 0 or an integer from 1 to 10, and where each "X" is selected from the group consisting of hydrogen, a halogen or an alkyl radical having from 1 to 10 carbon atoms, each "Y" is selected from the group consisting of a halogen and --OR where "R" is an alkyl group having from 1 to 10 carbon atoms, "a" is zero or an integer selected from the group consisting of 1 and 2, and "b" is an integer equal to 3 minus "a", and where the halogen is selected from the group consisting of chlorine, fluorine, bromine and iodine.
Claim 3
Dependent Claim
10 words
The process according to claim 1 where n is zero.
Claim 4
Dependent Claim
21 words
The process according to claim 2 wherein said coupling agent is selected from the group consisting of bicycloheptenyl-2-trichlorosilane, bicycloheptenyltriethoxysilane, and (bicyloheptenyl)methyldichlorosilane.
Claim 5
Dependent Claim
12 words
The process according to claim 3 wherein said coupling agent is bicycloheptenyl-2-trichlorosilane.
Claim 6
Dependent Claim
12 words
The process according to claim 1 wherein the monoalkenyl arene is styrene.
Claim 7
Dependent Claim
13 words
The process according to claim 1 where P-Li is a living polystyrene-polybutadiene-Li polymer.
Claim 8
Dependent Claim
30 words
The process according to claim 1 wherein said P-Li polymers are contacted with said coupling agent in the presence of a diluent and a minor amount of a polar compound.
Claim 9
Dependent Claim
20 words
The process according to claim 6 or claim 7 wherein said coupling agent is added incrementally to said reaction zone.
Claim 10
Dependent Claim
12 words
The polymer produced by the process of claim 1 or claim 3.
References Cited (Backward Citations)
US3880954A
Cited
US4185042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |