US4101387A
Expired / Lapsed
US
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Composition for electrodeposition of metal deposits, its method of preparation and uses thereof
Assignee: Oxy Metal Industries Corp
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Filing: 1975-08-11
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Granted: 1978-07-18
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Expires: 1995-08-11
Abstract
Abstract The instant invention is directed to an aqueous bath for the electrodeposition of bright metal deposits, and more particularly to a bath composition which provides upon the basis metal an electrodeposit having improved brightness, particularly in low current density areas, and as well, a condition of ductility markedly better than that which characterizes certain prior art baths. The electroplating bath composition of this invention embodies a polyethylenimine having the general empirical formula -[C2H5N]x-, and a sulfonating agent for the polyethylenimine, whereby there is obtained a reaction product which contains nitrogen substituted sulfamate groups as an integral part of the polymer chain. The nitrogen substituted sulfamate unit of the reaction product is represented by the formula: <IMAGE> where, M = H, Li, Na, K, or, NH4. The ratio of these nitrogen substituted sulfamate units to amino units, -[CH2CH2NH]-, in the reaction product is determined by the molar ratio of the polymer repeat unit, -[C2H5N]-, to sulfonating agent in the reaction.
Inventors
- 👤 Hans-Gerhard Creutz
- 👤 Roy Wilbur Herr
- 👤 Richard Marshall Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:03
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22; C25D3/12; C25D3/14; C25D3/56; C25D3/562
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
A composition of matter for use in an aqueous bath for the electrodeposition of bright metal deposits selected from the group consisting of nickel, nickel-iron and zinc, which comprises a reaction product of a polyethylenimine having the general empirical formula --[C 2 H 5 N] x --, and a sulfonating agent of said polyethylenimine, whereby there is obtained a reaction product which contains nitrogen substituted sulfamate groups as an integral part of the polymer chain, said nitrogen substituted sulfamate unit of the reaction product being represented by the formula: ##STR4## where M=H, Li, Na, K, or NH 4 , the ratio of said nitrogen substituted sulfamate units to amino units, --[CH 2 CH 2 NH]--, in the reaction product being determined by the molar ratio of the polymer repeat unit --[C 2 H 5 N]--, to sulfonating agent in the reaction.
Claim 2
Dependent Claim
141 words
A composition of matter for use in an aqueous bath for the electrodeposition of bright metal deposits selected from the group consisting of nickel, nickel-iron and zinc, which comprises a reaction product of a polyethylenimine having the general empirical formula --[C 2 H 5 N] x --, and a sulfonating agent of said polyethylenimine, whereby there is obtained a reaction product which contains nitrogen substituted sulfamate groups as an integral part of the polymer chain, said nitrogen substituted sulfamate unit of the reaction product being represented by the formula: ##STR4## where M=H, Li, Na, K, or NH 4 , the ratio of said nitrogen substituted sulfamate units to amino units, --[CH 2 CH 2 NH]--, in the reaction product being determined by the molar ratio of the polymer repeat unit --[C 2 H 5 N]--, to sulfonating agent in the reaction.
Claim 3
Dependent Claim
31 words
A composition of matter as defined in claim 1, wherein the molar ratio of nitrogen substituted sulfamate units to amino units varies from about 1 to 1 to 2 to 1.
Claim 4
Dependent Claim
153 words
A composition of matter for use in an aqueous bath for the electrodeposition of bright metal deposits selected from the group consisting of nickel, nickel-iron and zinc, which comprises a reaction product of a polyethylenimine having the general empirical formula --[C 2 H 5 N] x --, and a sulfonating agent selected from the group consisting of a sulfamic acid, chlorosulfuric acid and sulfur trioxide, the mole ratio of the polymer repeat unit --[C 2 H 5 N]--, to sulfamic acid being approximately 2 to 1, the mole ratio of polymer repeat unit --[C 2 H 5 N]-- to chlorosulfuric acid being approximately 1 to 1, and the mole ratio of polymer repeat unit --[C 2 H 5 N]--, to sulfur trioxide being in the range of 1 to 1 to 2 to 1, the molecular weight of the polyethylenimine varying from not less than about 300 to not more than approximately 1800.
Claim 5
Dependent Claim
153 words
A composition of matter for use in an aqueous bath for the electrodeposition of bright metal deposits selected from the group consisting of nickel, nickel-iron and zinc, which comprises a reaction product of a polyethylenimine having the general empirical formula --[C 2 H 5 N] x --, and a sulfonating agent selected from the group consisting of a sulfamic acid, chlorosulfuric acid and sulfur trioxide, the mole ratio of the polymer repeat unit --[C 2 H 5 N]--, to sulfamic acid being approximately 2 to 1, the mole ratio of polymer repeat unit --[C 2 H 5 N]-- to chlorosulfuric acid being approximately 1 to 1, and the mole ratio of polymer repeat unit --[C 2 H 5 N]--, to sulfur trioxide being in the range of 1 to 1 to 2 to 1, the molecular weight of the polyethylenimine varying from not less than about 300 to not more than approximately 1800.
Claim 6
Dependent Claim
128 words
A process for electrodepositing a bright metallic finish selected from the group consisting of nickel, nickel-iron and zinc upon a substrate, comprising passing a current through an aqueous acidic bath including a polyelectrolyte, in which the polyelectrolyte is a reaction product of a polyethylenimine and a sulfonating agent which contains nitrogen substituted sulfamate groups as a integral part of the polymer chain, said nitrogen substituted sulfamate unit of the reaction product is represented by the formula: ##STR5## where M=H, Li, Na, K, or NH 4 , the ratio of said nitrogen substituted sulfamate units to amino units --[CH 2 CH 2 NH]-- in the reaction product being determined by the molar ratio of the polymer repeat unit --[C 2 H 5 N]-- to sulfonating agent in the reaction.
Claim 7
Dependent Claim
128 words
A process for electrodepositing a bright metallic finish selected from the group consisting of nickel, nickel-iron and zinc upon a substrate, comprising passing a current through an aqueous acidic bath including a polyelectrolyte, in which the polyelectrolyte is a reaction product of a polyethylenimine and a sulfonating agent which contains nitrogen substituted sulfamate groups as a integral part of the polymer chain, said nitrogen substituted sulfamate unit of the reaction product is represented by the formula: ##STR5## where M=H, Li, Na, K, or NH 4 , the ratio of said nitrogen substituted sulfamate units to amino units --[CH 2 CH 2 NH]-- in the reaction product being determined by the molar ratio of the polymer repeat unit --[C 2 H 5 N]-- to sulfonating agent in the reaction.
Claim 8
Dependent Claim
157 words
A process for electrodepositing a bright metallic finish selected from the group consisting of nickel, nickel-iron and zinc upon a substrate, comprising passing a current through an aqueous acidic bath including a polyelectrolyte in which the polyelectrolyte is a polyethylenimine having the general empirical formula --[C 2 H 5 N] x -- and a compound selected from the group consisting of sulfamic acid, chlorosulfuric acid and sulfur trioxide, the mole ratio of the polymer repeat unit --[C 2 H 5 N]-- to sulfamic acid being about 2 to 1, the mole ratio of the polymer repeat unit --[C 2 H 5 N]-- to chlorosulfuric acid being approximately 1 to 1, and the mole ratio of polymer repeat unit --[C 2 H 5 N]-- to sulfur trioxide being in the range of 1 to 1 to 2 to 1, the molecular weight of the polyethylenimine varying from not less than about 300 to not more than approximately 1800.
Claim 9
Dependent Claim
157 words
A process for electrodepositing a bright metallic finish selected from the group consisting of nickel, nickel-iron and zinc upon a substrate, comprising passing a current through an aqueous acidic bath including a polyelectrolyte in which the polyelectrolyte is a polyethylenimine having the general empirical formula --[C 2 H 5 N] x -- and a compound selected from the group consisting of sulfamic acid, chlorosulfuric acid and sulfur trioxide, the mole ratio of the polymer repeat unit --[C 2 H 5 N]-- to sulfamic acid being about 2 to 1, the mole ratio of the polymer repeat unit --[C 2 H 5 N]-- to chlorosulfuric acid being approximately 1 to 1, and the mole ratio of polymer repeat unit --[C 2 H 5 N]-- to sulfur trioxide being in the range of 1 to 1 to 2 to 1, the molecular weight of the polyethylenimine varying from not less than about 300 to not more than approximately 1800.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |