US3928149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weak acidic bright ductile zinc electrolyte
Assignee: Dr Ing Max Schloetter GmbH and Co KG
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Filing: 1974-09-11
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Granted: 1975-12-23
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Expires: 1994-09-11
Abstract
Abstract An aqueous acidic zinc bath is used for electroplating bright ductile metallic zinc deposits on metal substrates, said plating bath containing at least one soluble zinc compound capable of being plated by electrolytic deposition and a polypropoxy ether or a polypropoxy-ethoxy ether interpolymer, the amount of ethylene oxide moeity does not exceed 25% by weight of the interpolymer.
Inventors
- 👤 Joachim Steeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:46
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
93 words
AN AQUEOUS ACID ZINC PLATING SUBSTANTILLY VOID OF AMMONIUM IONS FOR DEPOSITING DUCTILE GLOSSY TO BRIGHT ZINC LAYERS WITHIN A WIDE CATHODIC CURRENT DENSITY RANGE CONTAINING A WATER-SOLUBLE ZINC COMPOUND CAPABLE OF PLATING ZINC METAL ON A SUBSTRATE, AT LEAST ABOUT 1 G/L OF A POLYPROPOXY ETHER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 300 TO ABOUT 1500 AND/OR A POLYPROPOXY-ETHOXY ETHER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO ABOUT 5,000 AND CONTAINING UP TO ABOUT 25% BY WEIGHT OF THE POLYMER OF THE OXYETHYLENE MOIETY AND AN AROMATIC CARBONYL COMPOUND.
Claim 2
Dependent Claim
93 words
AN AQUEOUS ACID ZINC PLATING SUBSTANTILLY VOID OF AMMONIUM IONS FOR DEPOSITING DUCTILE GLOSSY TO BRIGHT ZINC LAYERS WITHIN A WIDE CATHODIC CURRENT DENSITY RANGE CONTAINING A WATER-SOLUBLE ZINC COMPOUND CAPABLE OF PLATING ZINC METAL ON A SUBSTRATE, AT LEAST ABOUT 1 G/L OF A POLYPROPOXY ETHER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 300 TO ABOUT 1500 AND/OR A POLYPROPOXY-ETHOXY ETHER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO ABOUT 5,000 AND CONTAINING UP TO ABOUT 25% BY WEIGHT OF THE POLYMER OF THE OXYETHYLENE MOIETY AND AN AROMATIC CARBONYL COMPOUND.
Claim 3
Dependent Claim
28 words
An aqueous acid zinc plating bath according to claim 1 in which the polymer is present in an amount from about 1 g/l to its limit of solubility.
Claim 4
Dependent Claim
24 words
An aqueous acid zinc plating bath according to claim 2 in which the polymer is present in concentrations of between 1 to 30 g/l.
Claim 5
Dependent Claim
20 words
An aqueous acid zinc plating bath according to claim 2 in which the pH is between about 4 and 6.
Claim 6
Dependent Claim
40 words
An aqueous acid zinc plating bath according to claim 1 in which the polymer is insoluble in the baths or exceeds the solubility of the polymer in the bath, and in which the polymer is emulsified with an emulsifying agent.
Claim 7
Dependent Claim
28 words
An aqueous acid zinc plating bath according to claim 5 in which the emulsifying agent includes alkyl sulfates, alkyl sulfonates, alkyl-substituted diphenyl oxide sulfonates or sulfonated polyglycol esters.
Claim 8
Dependent Claim
86 words
An aqueous acid zinc plating bath according to claim 5 in which the surface active emulsifying agents include the sodium salt of decyloxydiphenyldisulfonic acid; the condensation product of naphthalene sulfonic acid and formalin; oleylamine having 6 to 7 mols of ethylene oxide attached thereto and quaternized with dimethyl sulfate; isononyl alcohol having 15 mols of ethylene oxide attached thereto; the sodium salt of dodecyloxydiphenyl disulfonic acid; ethylhexyl sulfate C16-C18 sulfated aliphatic alcohols having from 70 to 90 mols of ethylene oxide attached thereto or dodecane amidobetaine.
Claim 9
Dependent Claim
24 words
An aqueous acid zinc plating bath according to claim 1 which contains a mixture of benzal acetone and sodium benzoate as a brightening agent.
Claim 10
Dependent Claim
78 words
AN AQUEOUS ACID ZINC PLATING BATH FOR DEPOSITING DUCTILE GLOSSY TO BRIGHT ZINC LAYERS WITHIN A WIDE CATHODIC CURRENT DENSITY RANGE CONTAINING A WATER-SOLUBLE ZINC COMPOUND CAPABLE OF PLATING ZINC METAL ON A SUBSTRATE AND A POLYPROPOXYETHOXY ETHER HAVING AN APPROXIMATE MOLECULAR WEIGHT OF BETWEEN ABOUT 1,000 TO ABOUT 5,000 AND CONTAINING UP TO ABOUT 25% BY WEIGHT OF THE POLYMER OF THE OXYETHYLENE MOIETY, SAID POLYMER BEING PRESENT IN AN AMOUNT OF AT LEAST ABOUT 1 G/L.
Claim 11
Dependent Claim
78 words
AN AQUEOUS ACID ZINC PLATING BATH FOR DEPOSITING DUCTILE GLOSSY TO BRIGHT ZINC LAYERS WITHIN A WIDE CATHODIC CURRENT DENSITY RANGE CONTAINING A WATER-SOLUBLE ZINC COMPOUND CAPABLE OF PLATING ZINC METAL ON A SUBSTRATE AND A POLYPROPOXYETHOXY ETHER HAVING AN APPROXIMATE MOLECULAR WEIGHT OF BETWEEN ABOUT 1,000 TO ABOUT 5,000 AND CONTAINING UP TO ABOUT 25% BY WEIGHT OF THE POLYMER OF THE OXYETHYLENE MOIETY, SAID POLYMER BEING PRESENT IN AN AMOUNT OF AT LEAST ABOUT 1 G/L.
Claim 12
Dependent Claim
40 words
An aqueous acid zinc plating bath according to claim 9 in which the polymer is insoluble in the bath or exceeds the solubility of the polymer in the bath and in whicH the polymer is emulsified with an emulsifying agent.
Claim 13
Dependent Claim
28 words
An aqueous acid zinc plating bath according to claim 10 in which the emulsifying agents include alkyl sulfates, alkyl sulfonates, alkyl-substituted diphenyl oxide sulfonates, or sulfonated polyglyoxal esters.
Claim 14
Dependent Claim
85 words
An aqueous acid zinc plating bath according to claim 10 in which the emulsifying agents include the sodium salt of decyloxydiphenyl disulfonic acid; the condensation product of naphthalene sulfonic acid and formalin; oleylamine having 6 to 7 mols of ethylene oxide attached thereto and quaternized with dimethyl sulfate; isononyl alcohol having 15 mols of ethylene oxide attached thereto; the sodium salt of dodecyloxydiphenyl disulfonic acid; ethylhexyl sulfate C16-C18 sulfated aliphatic alcohols having from 70 to 90 mols of ethylene oxide attached thereto or dodecane amidobetaine.
Claim 15
Dependent Claim
22 words
An aqueous acid zinc plating bath according to claim 9 which includes a brightening agent comprising one or more aromatic carbonyl compounds.
Claim 16
Dependent Claim
24 words
An aqueous acid zinc plating bath according to claim 13 in which the brightening agent is a mixture of benzyl acetone and sodium benzoate.
Claim 17
Dependent Claim
25 words
An aqueous acid zinc plating bath according to claim 9 in which the polymer is present in concentrations of between about 1 to 30 g/l.
References Cited (Backward Citations)
US3669854A
Cited
US3767540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |