Patent US4940553A successfully refreshed from Google Patents.
US4940553A
Expired / Lapsed
US
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Aqueous nickel hydroxide paste of high flowability
Assignee: Hoppecke Batterie Systeme GmbH
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Filing: 1989-05-26
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Granted: 1990-07-10
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Expires: 2009-05-26
Abstract
Abstract An aqueous nickel-hydroxide paste of high flowability for the vibration filling of foam-structure and fiber-structure electrode plaques has a content of about 30 to 50% by volume of nickel hydroxide, a maximum particle size of about 0.04 mm, a plastic viscosity of about 0.1 to 1 Pa.s and a yield value of between about 10 and 120 Pa, a pH of between about 9 and 12 and a content of about 0.5 to 5, in particular about 1 to 5, % by weight, based on the nickel hydroxide content, of a dispersant from the group comprising the water-soluble salts of polhphosphoric acids or di- and polyphosphonic acids and their derivatives. Very particularly suitable as a dispersant is 1-hydroxyethane-1, 1-diphosphonic acid in the form of its cobalt/alkali salt complex. This paste makes it possible to completely fill foam-structure and fiber-structure electrode plaques in one operation.
Inventors
- 👤 Klaus VON Benda
- 👤 Gabor Benczur-Urmossy
- 👤 Gerhard Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/24; H01M4/26; H01M4/36; H01M4/48; H01M4/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
Aqueous Ni(OH) 2 paste of high flowability for the vibration filling of foam-structure and fiber-structure electrode plaques having a content of nickel hydroxide of about 30 to 50% by volume, a maximum particle size of about 0.04 mm, a plastic viscosity of about 0.1 to 1 Pa.s and a yield value of between about 10 and 120 Pa, and also a pH of between about 9 and 12, which, in addition, also contains a dispersant, wherein the dispersant is selected from one of the group consisting of water-soluble salts of derivatives of di- and polyphosphonic acids and the group consisting of water-soluble salts of polyphosphoric acid, wherein the polyphosphoric acid has about 3 to 20 phosphorus atoms per molecule.
Claim 2
Dependent Claim
119 words
Aqueous Ni(OH) 2 paste of high flowability for the vibration filling of foam-structure and fiber-structure electrode plaques having a content of nickel hydroxide of about 30 to 50% by volume, a maximum particle size of about 0.04 mm, a plastic viscosity of about 0.1 to 1 Pa.s and a yield value of between about 10 and 120 Pa, and also a pH of between about 9 and 12, which, in addition, also contains a dispersant, wherein the dispersant is selected from one of the group consisting of water-soluble salts of derivatives of di- and polyphosphonic acids and the group consisting of water-soluble salts of polyphosphoric acid, wherein the polyphosphoric acid has about 3 to 20 phosphorus atoms per molecule.
Claim 3
Dependent Claim
21 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein the polyphosphoric acid has about 6 to 20 phosphorus atoms per molecule.
Claim 4
Dependent Claim
40 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein a content of about 0.5 to 5% by weight, based on the nickel hydroxide content, of the dispersant selected from the group consisting of water-soluble salts of polyphosphoric acid is provided.
Claim 5
Dependent Claim
32 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein the dispersant selected from the group consisting of water-soluble salts of derivatives of di- and polyphosphonic acids are alkylated or arylated phosphonic acids.
Claim 6
Dependent Claim
40 words
Aqueous Ni(OH) 2 paste according to claim 4, wherein the dispersant selected from the group consisting of water-soluble salts of derivatives of di- and polyphosphonic acids do not contain more than two C atoms per P atom in the molecule.
Claim 7
Dependent Claim
26 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein the dispersant selected from the group consisting of the water-soluble salts of polyphosphoric acids are alkali salts.
Claim 8
Dependent Claim
26 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein the dispersant selected from the group consisting of derivatives of di- and polyphosphonic acids are alkali salts.
Claim 9
Dependent Claim
23 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein the dispersant is selected from the group of 1-hydroxyethane-1, 1-diphosphonic acid and aminotrismethylenephosphonic acid.
Claim 10
Dependent Claim
65 words
Aqueous Ni(OH) 2 paste according to claim 1, wherein the dispersant is an alkali-metal/cobalt complex of 1-hydroxyethane-1, 1-disphosphonic acid (HEDP) of the formula Co x M y H z (HEDP), in which M denotes an alkali metal and x is between about 0.5 and 1.25, y is between about 0.5 and 1.5 and z is between about 0.2 and 2, with the proviso that 2x+y+z=4.
Claim 11
Dependent Claim
31 words
Aqueous Ni(OH) 2 paste according to claim 1, further including at least one of a cobalt powder and cobalt compounds selected from the group consisting of oxides, hydroxides, borates and phosphates.
Claim 12
Dependent Claim
25 words
Aqueous Ni(OH) 2 paste according to claim 10, wherein total cobalt content in the paste is about 2 to 12 atom percent, based on nickel.
References Cited (Backward Citations)
US3009979A
Cited
US3597829A
Cited
US3764380A
Cited
US4169075A
Cited
US4074482A
Cited
US4130696A
Cited
US4217939A
Cited
US4301218A
Cited
US4218256A
Cited
US4390447A
Cited
US4481128A
Cited
US4443526A
Cited
US4663256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |