US4170526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating bath and process
Assignee: Oxy Metal Industries Corp
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Filing: 1978-01-16
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Granted: 1979-10-09
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Expires: 1998-01-16
Abstract
Abstract A non-cyanide acid or substantially neutral zinc electroplating bath and zinc plating process employing said bath which contains an effective amount of a brightening and leveling agent, and which comprises a bath soluble quaternary compound formed by the reaction of heterocyclics with an alkylating agent selected from the group consisting of dialkyl sulfates, alkyl alkane sulfonates and alkyl arene sulfonates. The versatility and effectiveness of the brightening and leveling agent of this invention enables improved processing of a wide variety of articles, thereby requiring only minimal amounts of the additive agent to produce brilliant and smooth zinc deposits.
Inventors
- 👤 Hans G. Creutz, deceased
- 👤 Roy W. Herr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:49
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/22; C25D; C25D3/00; C25D3/02; C25D3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
An aqueous non-cyanide zinc electroplating bath having a pH of from about 2.0 to about 9.0 which electroplating bath contains an effective amount of a brightening and leveling agent comprising a bath soluble nitrogen heterocyclic quaternary having the formula: ##STR3## Wherein: Q=R 1 , R 2 O R=ch 3 , c 2 h 5 r 1 =ch 3 , c 2 h 5 , ch 3 c 6 h 4 r 2 =ch 3 , c 2 h 5
Claim 2
Dependent Claim
79 words
An aqueous non-cyanide zinc electroplating bath having a pH of from about 2.0 to about 9.0 which electroplating bath contains an effective amount of a brightening and leveling agent comprising a bath soluble nitrogen heterocyclic quaternary having the formula: ##STR3## Wherein: Q=R 1 , R 2 O R=ch 3 , c 2 h 5 r 1 =ch 3 , c 2 h 5 , ch 3 c 6 h 4 r 2 =ch 3 , c 2 h 5
Claim 3
Dependent Claim
44 words
a zinc electroplating bath as defined in claim 1, in which the nitrogen heterocyclic is selected from the group consisting of pyridine, isoquinoline, quinoline, pyrimidine, phenazine, imidazole, imidazoline, pyrrole, pyrazole, pyrazine, purine, acridine, and soluble substituted derivatives of the named compounds and mixtures thereof.
Claim 4
Dependent Claim
29 words
A zinc electroplating bath as defined in claim 1, in which the brightening and leveling agent is present in an amount of between about 1/2 mg/l and 5.0 g/l.
Claim 5
Dependent Claim
56 words
A zinc electroplating bath as defined in claim 1, in which the quaternary is selected from the group consisting of isoquinoline diethyl sulfate quaternary, quinaldine diethyl sulfate quaternary, propylisonicotinate dipropyl sulfate quaternary, pyrimidine diethyl sulfate quaternary, phenazine dimethyl sulfate quaternary, pyridine-N-methyl tosylate quaternary, pyridine dimethyl sulfate quaternary, nicotinamide dimethyl sulfate quaternary, and imidazole dimethyl sulfate quaternary.
Claim 6
Dependent Claim
40 words
A zinc electroplating bath as defined in claim 1, in which there is further included a secondary brightener selected from the group consisting of acetylenic glycol 2,3,7,9-tetramethyl 5-decyne-4,7 diol ethoxylated; B-naphthol ethoxylated; phenol ethoxylated; polyglycidol; polyoxyethylene; polyoxypropylene; and mixtures thereof.
Claim 7
Dependent Claim
32 words
A process for depositing a bright, smooth, adherent zinc plating on a substrate which comprises the steps of electrodepositing zinc from an aqueous non-cyanide zinc electroplating bath as defined in claim 1.
References Cited (Backward Citations)
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Cited
US3822194A
Cited
US3729394A
Cited
US3884774A
Cited
US3928149A
Cited
US3920528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |