US4416740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and bath for the electrodeposition of palladium/nickel alloys
Assignee: Langbein Pfanhauser Werke AG
•
Filing: 1982-03-05
•
Granted: 1983-11-22
•
Expires: 2002-03-05
Abstract
Abstract A method of electrodepositing a palladium/nickel alloy coating upon a substrate wherein the coating is plated onto the substrate by electrodeposition from a bath containing 5 to 30 g per liter of palladium and 5 to 30 g per liter of nickel and having a palladium-nickel ratio such that the coating contains 30 to 90% by weight of palladium. The bath is provided during the electrodeposition of the coating with at least one acetylene amine or amino alcohol capable of improving the brightness and mechanical properties of the coating.
Inventors
- 👤 Klaus Schulze-Berge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:04
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/562; C25D3/567
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
In a method of electrodepositing a palladium/nickel alloy coating upon a substrate wherein said coating is plated onto said substrate by electrodeposition from a bath containing 5 to 30 g per liter of palladium and 5 to 30 g per liter of nickel and having a palladium-nickel ratio such that the coating contains 30 to 90% by weight of palladium, the improvement which comprises providing in said bath during the electrodeposition of said coating at least one acetyleneamine or amino alcohol capable of improving the brightness and mechanical properties of said coating and selected from the group which consists of: dimethylpropyn-2-ylamine, 1-diethylaminopropyn-(2), 1-diethylaminopentyn-2-ol-(4), 1-dimethylaminopropyn-(2), and 1,1-diethylpropyn-2-ylamine, and mixtures thereof.
Claim 2
Dependent Claim
109 words
In a method of electrodepositing a palladium/nickel alloy coating upon a substrate wherein said coating is plated onto said substrate by electrodeposition from a bath containing 5 to 30 g per liter of palladium and 5 to 30 g per liter of nickel and having a palladium-nickel ratio such that the coating contains 30 to 90% by weight of palladium, the improvement which comprises providing in said bath during the electrodeposition of said coating at least one acetyleneamine or amino alcohol capable of improving the brightness and mechanical properties of said coating and selected from the group which consists of: dimethylpropyn-2-ylamine, 1-diethylaminopropyn-(2), 1-diethylaminopentyn-2-ol-(4), 1-dimethylaminopropyn-(2), and 1,1-diethylpropyn-2-ylamine, and mixtures thereof.
Claim 3
Dependent Claim
125 words
A bath for the electrodeposition of palladium/nickel alloy coatings upon a substrate, said bath comprising an aqueous solution of a palladium amine in an amount sufficient to provide a palladium content in said bath of 5 to 30 g per liter, a nickel amine in an amount sufficient to provide a nickel content in said bath of 5 to 30 g per liter, the palladium-nickel ratio being sufficient to deposit a coating of 30 to 90 weight % palladium, and at least one acetyleneamine or acetyleneamino alcohol compound in an amount of 0.01 g per liter to 10 g per liter, sufficient to improve the brightness of said coating and selected from the group which consists of: dimethylpropyn-2-ylamine 1-diethylaminopropyn-(2) 1-diethylaminopentyn-2-ol-(4) 1-dimethylaminopropyn-(2) 1,1-diethylpropyn-2-ylamine and mixtures thereof.
Claim 4
Dependent Claim
125 words
A bath for the electrodeposition of palladium/nickel alloy coatings upon a substrate, said bath comprising an aqueous solution of a palladium amine in an amount sufficient to provide a palladium content in said bath of 5 to 30 g per liter, a nickel amine in an amount sufficient to provide a nickel content in said bath of 5 to 30 g per liter, the palladium-nickel ratio being sufficient to deposit a coating of 30 to 90 weight % palladium, and at least one acetyleneamine or acetyleneamino alcohol compound in an amount of 0.01 g per liter to 10 g per liter, sufficient to improve the brightness of said coating and selected from the group which consists of: dimethylpropyn-2-ylamine 1-diethylaminopropyn-(2) 1-diethylaminopentyn-2-ol-(4) 1-dimethylaminopropyn-(2) 1,1-diethylpropyn-2-ylamine and mixtures thereof.
References Cited (Backward Citations)
US2781306A
Cited
US3002903A
Cited
US3133006A
Cited
US3186926A
Cited
GB1143178A
Cited
US4077855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |