Patent US5415958A successfully refreshed from Google Patents.
US5415958A
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Vinylidene fluoride copolymer, and binder composition containing the copolymer for non-aqueous solvent-type secondary battery
Assignee: Kureha Corp
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Filing: 1993-12-01
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Granted: 1995-05-16
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Expires: 2013-12-01
Abstract
Abstract A vinylidene fluoride copolymer containing a carboxyl group or a carbonate group is formed by copolymerizing a monomer principally comprising vinylidene fluoride with a relatively small amount of an unsaturated dibasic acid monoester or vinylene carbonate. The copolymer has a large adhesion to various substrates or fillers and is excellent in chemical resistance, so that it is useful as a basic substance constituting a binder, an adhesive, a paint, etc. The copolymer is particularly effectively used as a binder for constituting an electrode for a non-aqueous solvent-type secondary battery together with an active substance, or an active substance and an electroconductive material, respectively in a particulate form.
Inventors
- 👤 Yosuke Takahashi
- 👤 Fujio Suzuki
- 👤 Takao Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:36
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C08F214/225; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/16; H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/621; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A vinylidene fluoride copolymer, comprising: (a) a major amount of a monomer comprising 100-80 wt. % of vinylidene fluoride and 0-20 wt. % of another monomer copolymerizable with the vinylidene fluoride, and (b) a minor amount effective to improve the adhesion of the vinylidene fluoride copolymer to a substrate of an unsaturated dibasic acid monoester polar monomer; said vinylidene fluoride copolymer having a carbonyl group content of 1×10 6 -5×10 4 mol/g.
Claim 2
Dependent Claim
72 words
A vinylidene fluoride copolymer, comprising: (a) a major amount of a monomer comprising 100-80 wt. % of vinylidene fluoride and 0-20 wt. % of another monomer copolymerizable with the vinylidene fluoride, and (b) a minor amount effective to improve the adhesion of the vinylidene fluoride copolymer to a substrate of an unsaturated dibasic acid monoester polar monomer; said vinylidene fluoride copolymer having a carbonyl group content of 1×10 6 -5×10 4 mol/g.
Claim 3
Dependent Claim
33 words
A vinylidene fluoride copolymer according to claim 1, wherein said polar monomer comprises at least one unsaturated dibasic acid monoester selected from the group consisting of maleic acid monoesters and citraconic acid monoesters.
Claim 4
Dependent Claim
35 words
A vinylidene fluoride copolymer according to claim 2, wherein said polar monomer comprises at least one unsaturated dibasic acid monoester selected from the group consisting of maleic acid monomethyl ester and citraconic acid monomethyl ester.
Claim 5
Dependent Claim
51 words
A vinylidene fluoride copolymer obtained by copolymerizing (a) 100 wt. parts of a monomer comprising 100-80 wt. % of vinylidene fluoride and another monomer copolymerizable with the vinylidene fluoride, and (b) a polar monomer selected from 0.1-3 wt. parts of a dibasic acid monoester and 0.1-5 wt. parts of vinylene carbonate.
Claim 6
Dependent Claim
51 words
A vinylidene fluoride copolymer obtained by copolymerizing (a) 100 wt. parts of a monomer comprising 100-80 wt. % of vinylidene fluoride and another monomer copolymerizable with the vinylidene fluoride, and (b) a polar monomer selected from 0.1-3 wt. parts of a dibasic acid monoester and 0.1-5 wt. parts of vinylene carbonate.
Claim 7
Dependent Claim
17 words
A vinylidene fluoride copolymer according to claim 4, wherein the copolymerization is performed in an aqueous medium.
Claim 8
Dependent Claim
16 words
A vinylidene fluoride copolymer according to claim 5, wherein the copolymerization is performed by suspension polymerization.
Claim 9
Dependent Claim
30 words
A binder solution composition, comprising: a vinylidene fluoride copolymer according to any of claims 1, 2, 4, 5 and 6 and a solvent capable of dissolving the vinylidene fluoride copolymer.
Claim 10
Dependent Claim
48 words
An electrode-forming composition for a non-aqueous electrolyte secondary battery, comprising: a vinylidene fluoride copolymer according to any of claims 1, 2, 4, 5 and 6, a solvent capable of dissolving the vinylidene fluoride copolymer, and a particulate active substance, or a particulate active substance and an electroconductive material.
Claim 11
Dependent Claim
66 words
An electrode structure for a non-aqueous electrolyte secondary battery, comprising: an electroconductive substrate and a composite electrode layer disposed on at least one surface of the electroconductive substrate; said composite electrode layer comprising a particulate active substance, or a particulate active substance and an electroconductive material, and a binder comprising a vinylidene fluoride copolymer according to any of claims 1, 2, 3, 4, 5 and 6.
Claim 12
Dependent Claim
44 words
A non-aqueous electrolyte secondary battery, comprising, a positive electrode, a negative electrode, and a separator and a non-aqueous electrolytic solution disposed between the positive and negative electrodes; at least one of said positive and negative electrodes comprising an electrode structure according to claim 9.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-15 | 1998-11-14 | 1999-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-15 | 2002-11-14 | 2003-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-15 | 2006-11-14 | 2007-05-16 | $7700.00 | Window Closed / Lapsed |