US4252619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brightener for zinc electroplating solutions and process
Assignee: OMI International Corp
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Filing: 1979-10-24
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Granted: 1981-02-24
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Expires: 1999-10-24
Abstract
Abstract An aqueous acidic or alkaline zinc electroplating solution and process for producing a bright, adherent and ductile zinc deposit on conductive substrates incorporating a primary brightening agent comprising a compound or mixture of compounds represented by the structural formulae: ##STR1## The brightening agent is present in a controlled effective amount to provide a brightening and ductilizing of the deposited zinc plating. The electroplating solution further can incorporate conventional constituents and supplemental additives of the types well known in the art.
Inventors
- 👤 Bento DaFonte, Jr.
- 👤 Sylvia Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
172 words
An aqueous zinc electroplating solution comprising zinc ions and an effective amount sufficient to provide a bright, adherent and ductile zinc electrodeposit on a conductive substrate of a bath soluble brightening agent comprising a compound and mixtures of compounds represented by the structural formulae: ##STR4## Wherein: R is H or C 6 -C 10 aryl, or C 6 -C 20 alkyl aryl in which the alkyl group is C 1 -C 4 ; or C 1 -C 22 alkyl, or C 2 -C 10 heterocyclic nitrogen compounds having at least one tertiary or quaternary ring containing nitrogen; as well as the mono, di or tri substituted derivatives thereof including --OH, --SO 3 H or --COOH; the Group I and II and NH 4 salts thereof; and the aldehyde, ketone and ether derivatives thereof; X is R or --OR' or --NR 2 ' in which R' is H or a C 1 -C 4 aliphatic radical; and Y is H or SO 3 H. as well as the compatible bath soluble salts thereof.
Claim 2
Dependent Claim
172 words
An aqueous zinc electroplating solution comprising zinc ions and an effective amount sufficient to provide a bright, adherent and ductile zinc electrodeposit on a conductive substrate of a bath soluble brightening agent comprising a compound and mixtures of compounds represented by the structural formulae: ##STR4## Wherein: R is H or C 6 -C 10 aryl, or C 6 -C 20 alkyl aryl in which the alkyl group is C 1 -C 4 ; or C 1 -C 22 alkyl, or C 2 -C 10 heterocyclic nitrogen compounds having at least one tertiary or quaternary ring containing nitrogen; as well as the mono, di or tri substituted derivatives thereof including --OH, --SO 3 H or --COOH; the Group I and II and NH 4 salts thereof; and the aldehyde, ketone and ether derivatives thereof; X is R or --OR' or --NR 2 ' in which R' is H or a C 1 -C 4 aliphatic radical; and Y is H or SO 3 H. as well as the compatible bath soluble salts thereof.
Claim 3
Dependent Claim
26 words
The zinc electroplating solution as defined in claim 1 in which said brightening agent is present in an amount of about 0.001 to about 10 g/l.
Claim 4
Dependent Claim
26 words
The zinc electroplating solution as defined in claim 1 in which said brightening agent is present in an amount of about 0.01 to about 5 g/l.
Claim 5
Dependent Claim
26 words
The zinc electrotplating solution as defined in claim 1 in which said zinc ions are present in an amount of about 5 to about 110 g/l.
Claim 6
Dependent Claim
41 words
The zinc electroplating solution as defined in claim 1 comprising an acid chloride solution containing said zinc ions in an amount of about 7 to about 50 g/l and hydrogen ions to provide a pH of about 4.5 to about 6.2.
Claim 7
Dependent Claim
22 words
The zinc electroplating solution as defined in claim 5 further including about 20 to about 450 g/l of alkali metal chloride salts.
Claim 8
Dependent Claim
41 words
The zinc electroplating solution as defined in claim 1 comprising an acid sulfate solution containing said zinc ions in an amount of about 30 to about 110 g/l and hydrogen ions to provide a pH of about 3.5 to about 5.2.
Claim 9
Dependent Claim
26 words
The zinc electroplating solution as defined in claim 5 or 7 further including about 1 to about 40 g/l of boric acid as a buffering agent.
Claim 10
Dependent Claim
42 words
The zinc electroplating solution as defined in claim 1 comprising an alkaline solution containing said zinc ions in an amount of about 5 to about 25 g/l and an alkali metal hydroxide to provide a pH of about 12 to about 14.
Claim 11
Dependent Claim
24 words
The zinc electroplating solution as defined in claim 1 further including solution compatible secondary brightening agents in an amount up to about 10 g/l.
Claim 12
Dependent Claim
27 words
The zinc electroplating solution as defined in claim 10 in which said secondary brightening agents are present in an amount of about 0.2 to about 5 g/l.
Claim 13
Dependent Claim
44 words
A method for electrodepositing zinc on a substrate which comprises the step of electrodepositing zinc from an aqueous zinc electroplating solution as defined in claim 1 or 2 or 3 or 4 or 5 or 7 or 6 or 9 or 10 or 11.
Claim 14
Dependent Claim
26 words
A method for electrodepositing zinc on a substrate which comprises the step of electrodepositing zinc from an aqueous zinc electroplating solution as defined in claim 8.
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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |