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US4212709A
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Acidic nickel electroplating bath containing sulfobetaines as brighteners and levelling agents
Assignee: BASF SE
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Filing: 1979-05-11
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Granted: 1980-07-15
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Expires: 1999-05-11
Abstract
Abstract An acidic nickel electroplating bath containing brighteners and levelling agents, wherein the levelling agents are compounds of the formula I ##STR1## where N is a hetero-aromatic nitrogen base, R, R 1 and R 2 are hydrogen or alkyl, R 3 is arylene, X is SO 3 - , Y is a neutralizing cation, n is from 1 to 3 and m is from 1 to 2.5.
Inventors
- 👤 Manfred Patsch
- 👤 Dieter Schneider
- 👤 Guenther Gotsmann
- 👤 Albert Hettche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:15
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14; C25D3/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
132 words
An acidic nickel electroplating bath of conventional composition, containing brighteners and levelling agents, wherein the said brighteners and levelling agents comprise one or more compounds of the formula I ##STR49## where N is a mononuclear or polynuclear heterocyclic-aromatic nitrogen base, R, R 1 and R 2 are hydrogen or C 1 -C 4 -alkyl, and may be identical or different from one another, R 3 is phenylene or thienylene, either of which is unsubstituted or substituted by chlorine, bromine, C 1 -C 4 -alkyl, methoxy or ethoxy, X is SO 3 .sup.⊖, Y is an alkali metal ion, ammonium ion or substituted ammonium ion or half of an alkaline earth metal cation or of a divalent transition metal cation, n is from 1 to 3 and m is from 1 to 2.5.
Claim 2
Dependent Claim
132 words
An acidic nickel electroplating bath of conventional composition, containing brighteners and levelling agents, wherein the said brighteners and levelling agents comprise one or more compounds of the formula I ##STR49## where N is a mononuclear or polynuclear heterocyclic-aromatic nitrogen base, R, R 1 and R 2 are hydrogen or C 1 -C 4 -alkyl, and may be identical or different from one another, R 3 is phenylene or thienylene, either of which is unsubstituted or substituted by chlorine, bromine, C 1 -C 4 -alkyl, methoxy or ethoxy, X is SO 3 .sup.⊖, Y is an alkali metal ion, ammonium ion or substituted ammonium ion or half of an alkaline earth metal cation or of a divalent transition metal cation, n is from 1 to 3 and m is from 1 to 2.5.
Claim 3
Dependent Claim
47 words
An acidic nickel electroplating bath which contains, as brighteners and levelling agents, one or more compounds of the formula I according to claim 1, where N is pyridine, imidazole, thiazole, pyridazine, pyrazine, pyrimidine, quinoline, isoquinoline, 1,2- or 1,3-benzdiazine, a naphthiridine, a pyridopyridine, a triazine or an acridine.
References Cited (Backward Citations)
DE1191652B
Cited
US3314868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |