US4014761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bright acid zinc plating
Assignee: Arkema Inc
•
Filing: 1975-01-06
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Granted: 1977-03-29
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Expires: 1995-01-06
Abstract
Abstract This invention relates to a method of producing lustrous to brilliant zinc electrodeposits, which comprises passing current from a zinc anode to a metal cathode for a time period sufficient to deposit a lustrous to brilliant zinc electrodeposit upon said cathode; the current passing through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc said zinc compound selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate; chloride anions added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing as cooperating additives at least one polyether surfactant, at least one aromatic carbonyl compound, and, as a luster and leveling development agent, sulfonated castor oil.
Inventors
- 👤 Frank Passal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:58
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
129 words
A method for producing lustrous to brilliant zinc electrodeposits which comprises passing current from a zinc anode to a metal cathode the current passing through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc said zinc compound selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate; chloride anions added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing as cooperating additives from 1 to 30 grams per liter of at least one polyether surfactant, 0.025 to 1.0 gram per liter of at least one aromatic carbonyl compound, and, as a luster and leveling development agent, 0.1 to 2.0 grams per liter of sulfonated castor oil.
Claim 2
Independent Claim
129 words
A method for producing lustrous to brilliant zinc electrodeposits which comprises passing current from a zinc anode to a metal cathode the current passing through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc said zinc compound selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate; chloride anions added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing as cooperating additives from 1 to 30 grams per liter of at least one polyether surfactant, 0.025 to 1.0 gram per liter of at least one aromatic carbonyl compound, and, as a luster and leveling development agent, 0.1 to 2.0 grams per liter of sulfonated castor oil.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein at least one zinc compound is selected from zinc sulfate, zinc chloride and mixtures thereof.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said zinc compound is zinc sulfamate.
Claim 5
Dependent Claim
39 words
The process of claim 1 wherein said polyether surfactant exhibits the formula: ##STR12## where n is an integer of from 10 to 20, and R is hydrogen or methyl, and X is an integer of from 10 to 20.
Claim 6
Dependent Claim
54 words
The process of claim 1 wherein said polyether surfactant exhibits the formula: ##STR13## where R' is methyl (CH 3 ), R is an alkyl straight or branched carbon chain containing 10 to 18 carbon (atoms), x is an integer of from 2 to 5, and y is an integer of from 10 to 20.
Claim 7
Dependent Claim
33 words
The process of claim 1 wherein said polyether surfactant exhibits the formula: ##STR14## where R is hydrogen or methyl, and x is an integer to give a Molecular Weight of 300 to 1000.
Claim 8
Dependent Claim
37 words
The process of claim 1 wherein said polyether surfactant exhibits the formula: ##STR15## where R is a straight carbon chain having 9 to 18 atoms of carbon, and x is an integer of from 10 to 20.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said aromatic carbonyl compound is benzylidene acetone.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein said aromatic carbonyl compound is furfuryl acetone.
Claim 11
Dependent Claim
13 words
The process of claim 1 wherein said aromatic carbonyl compound is furfuryl crotonaldehyde.
Claim 12
Dependent Claim
13 words
The process of claim 1 wherein said aromatic carbonyl compound is furfuryl acetonylacetone.
Claim 13
Dependent Claim
104 words
An aqueous acidic plating solution containing at least one zinc compound providing zinc cations for electroplating zinc said zinc compound selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate; chloride anions added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing as cooperating additives from 1 to 30 grams per liter of at least one polyether surfactant, 0.025 to 1.0 gram per liter of at least one aromatic carbonyl compound, and, as a luster and leveling development agent, 0.1 to 2.0 grams per liter of sulfonated castor oil.
Claim 14
Dependent Claim
104 words
An aqueous acidic plating solution containing at least one zinc compound providing zinc cations for electroplating zinc said zinc compound selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate; chloride anions added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing as cooperating additives from 1 to 30 grams per liter of at least one polyether surfactant, 0.025 to 1.0 gram per liter of at least one aromatic carbonyl compound, and, as a luster and leveling development agent, 0.1 to 2.0 grams per liter of sulfonated castor oil.
Claim 15
Dependent Claim
21 words
The composition of claim 12 wherein at least one zinc compound is selected from zinc sulfate, zinc chloride and mixtures thereof.
Claim 16
Dependent Claim
12 words
The composition of claim 12 wherein said zinc compound is zinc sulfamate.
Claim 17
Dependent Claim
38 words
The composition of claim 12 wherein said polyether surfactant exhibits the formula: ##STR16## where n is an integer of from 10 to 20, R is hydrogen or methyl, and x is an integer of from 10 to 20.
Claim 18
Dependent Claim
53 words
The composition of claim 12 wherein said polyether surfactant exhibits the formula: ##STR17## where R' is methyl (CH 3 ), R is a straight or branched alkyl chain containing 10 to 18 carbon (atoms), x is an integer of from 2 to 5, and y is an integer of from 10 to 20.
Claim 19
Dependent Claim
33 words
The composition of claim 12 wherein said polyether surfactant exhibits the formula: ##STR18## where R is hydrogen or methyl, and x is an integer to give a Molecular weight of 300 to 1000.
Claim 20
Dependent Claim
37 words
The composition of claim 12 wherein said polyether surfactant exhibits the formula: ##STR19## where R is a straight carbon chain having 9 to 18 atoms of carbon, and x is an integer of from 10 to 20.
Claim 21
Dependent Claim
13 words
The composition of claim 12 wherein said aromatic carbonyl compound is benzylidene acetone.
Claim 22
Dependent Claim
13 words
The composition of claim 12 wherein said aromatic carbonyl compound is furfuryl acetone.
Claim 23
Dependent Claim
13 words
The composition of claim 12 wherein said aromatic carbonyl compound is furfuryl crotonaldehyde.
Claim 24
Dependent Claim
13 words
The composition of claim 12 wherein said aromatic carbonyl compound is furfuryl acetonylacetone.
References Cited (Backward Citations)
US3245886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |