US4754005A
Expired / Lapsed
US
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Method for the termination of living polymers obtained by anionic polymerization and compounds suitable to that purpose
Assignee: Eni Tecnologie SpA
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Filing: 1986-06-20
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Granted: 1988-06-28
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Expires: 2006-06-20
Abstract
Abstract Coupling agents of general formula ##STR1## and their use in a method for the termination of living polymers obtained by the anionic polymerization of dienic and/or vinylaromatic monomers.
Inventors
- 👤 Arnaldo Roggero
- 👤 Alberto Gandini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:31
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
A method of terminating living macroanions obtained by the anionic polymerization of polymerizable monomers selected from dienic monomers, vinyl aromatic monomers or both, comprising introducing to said macroanions in a single addition or stepwise at least one coupling agent selected from methyl-N-[benzylidene] p-aminobenzoate; p-phenylenediamine-N,N'-bis[(benzylidene)-4-(carbomethoxy)]; 1,6-diamino-hexane-N,N'bis[(benzylidene)-4-carbomethoxy)]; 4-carbomethoxy benzylidene-aniline; and 4-[(benzene-ethenyl)-benzylidene] aniline.
Claim 2
Independent Claim
50 words
A method of terminating living macroanions obtained by the anionic polymerization of polymerizable monomers selected from dienic monomers, vinyl aromatic monomers or both, comprising introducing to said macroanions in a single addition or stepwise at least one coupling agent selected from methyl-N-[benzylidene] p-aminobenzoate; p-phenylenediamine-N,N'-bis[(benzylidene)-4-(carbomethoxy)]; 1,6-diamino-hexane-N,N'bis[(benzylidene)-4-carbomethoxy)]; 4-carbomethoxy benzylidene-aniline; and 4-[(benzene-ethenyl)-benzylidene] aniline.
Claim 3
Dependent Claim
18 words
The method of claim 1 further comprising conducting the reaction in the presence of at least one initiator.
Claim 4
Dependent Claim
32 words
The method of claim 2 wherein the initiator is a compound of the formula R--Me wherein R is selected from aliphatic, cycloaliphatic and aromatic hydrocarbon groups and Me is an alkali metal.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the termination reaction is conducted at a temperature of from 20° to 150° C.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein the termination reaction is conducted at a temperature of from 40° to 80° C.
Claim 7
Dependent Claim
59 words
The method of claim 1 wherein the molar amount of the coupling agent is represented by the formula: m.sub.AC =m.sub.CA /f.sub.AC wherein m CA is the molar amount of the active centers of the polymer and f AC is the total number of functional groups of the coupling agent less the number of functional groups of the formula --CH═N--.
Claim 8
Dependent Claim
33 words
The method of claim 1 wherein the vinylaromatic monomers are selected from those having 8 to 20 carbon atoms and the dienic monomers are selected from those having 4 to 12 carbon atoms.
References Cited (Backward Citations)
US4258162A
Cited
EP0207559A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |