US4049753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling of alkali metal-terminated polymers
Assignee: Phillips Petroleum Co
•
Filing: 1976-04-19
•
Granted: 1977-09-20
•
Expires: 1996-04-19
Abstract
Abstract Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by an anhydride of a monocarboxylic acid having 2 to 8 carbon atoms per molecule.
Inventors
- 👤 George A. Moczygemba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:58
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A polymer having the structure ##STR5## wherein the radicals R, which can be the same or different, are hydrocarbyl radicals with 1 to 7 carbon atoms, R' is a divalent radical selected from the group consisting of ##STR6## wherein Y is selected from the group of radicals consisting of --OH and --Z, and wherein Z is a homopolymer or copolymer chain of one or more conjugated alkadienes of 4 to 12 carbon atoms per molecule or a copolymer chain of at least one alkadiene of 4 to 12 carbon atoms and at least one monovinyl-substituted arene radical of 8 to 18 carbon atoms per molecule, the vinyl radical being attached to a carbon atom of the arene ring, with the further provision that at least 160 polymer chains Z are present in 100 molecules of formula (I).
Claim 2
Dependent Claim
137 words
A polymer having the structure ##STR5## wherein the radicals R, which can be the same or different, are hydrocarbyl radicals with 1 to 7 carbon atoms, R' is a divalent radical selected from the group consisting of ##STR6## wherein Y is selected from the group of radicals consisting of --OH and --Z, and wherein Z is a homopolymer or copolymer chain of one or more conjugated alkadienes of 4 to 12 carbon atoms per molecule or a copolymer chain of at least one alkadiene of 4 to 12 carbon atoms and at least one monovinyl-substituted arene radical of 8 to 18 carbon atoms per molecule, the vinyl radical being attached to a carbon atom of the arene ring, with the further provision that at least 160 polymer chains Z are present in 100 molecules of formula (I).
Claim 3
Dependent Claim
19 words
A polymer in accordance with claim 1 wherein R is an alkyl radical with 1 to 3 carbon atoms.
Claim 4
Dependent Claim
11 words
A polymer in accordance with claim 1 wherein R is methyl.
Claim 5
Dependent Claim
39 words
A polymer in accordance with claim 1 wherein the polymer chain Z is selected from the group consisting of homopolymers and copolymers of butadiene and isoprene and of copolymers of butadiene and/or isoprene with styrene and/or a methyl styrene.
Claim 6
Dependent Claim
47 words
A polymer in accordance with claim 1 wherein the polymer chain radicals Z have the structure A-B-, wherein A is a polystyrene block and B is a rubbery block obtained by polymerizing or copolymerizing an alkadiene selected from the group consisting of butadiene, isoprene and mixtures thereof.
Claim 7
Dependent Claim
11 words
A polymer in accordance with claim 1 wherein Z is polybutadiene.
References Cited (Backward Citations)
US3135716A
Cited
US3281383A
Cited
US3551392A
Cited
US3651025A
Cited
US3631156A
Cited
US3668279A
Cited
US3766301A
Cited
US3803087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |