US4405663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin plating bath composition and process
Assignee: Ltv Steel Co Inc
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Filing: 1982-03-29
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Granted: 1983-09-20
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Expires: 2002-03-29
Abstract
Abstract An immersion tin plating bath composition permits high speed plating of tin over zinc and zinc alloy coated steel. The bath consists of stannous ion, a mineral acid, a surfactant consisting of nonylphenoxypoly(ethyleneoxy)ethanol and Guar gum resin as a bodying agent. The combination of the surfactant and bodying agent makes it possible to obtain an adherent tin coating of minimum porosity and controlled, uniform thickness on a continuous basis by roll coating application.
Inventors
- 👤 Edmund W. Kinkelaar
- 👤 Paul Golar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:18
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
An aqueous immersion plating bath for plating tin over zinc coated steel, said bath comprising: (a) stannous ion in an amount ranging from 50 to 100 grams per liter of water; (b) sulfuric acid in an amount ranging from 20 to 100 grams per liter of water; (c) nonylphenoxy-poly(ethyleneoxy)ethanol having a molecular weight of from about 740 to 1600 in an amount ranging from 1.5 to 3.0 grams per liter of water; and (d) Guar gum resin in an amount ranging from 1.5 to 11.5 grams per liter of water.
Claim 2
Dependent Claim
90 words
An aqueous immersion plating bath for plating tin over zinc coated steel, said bath comprising: (a) stannous ion in an amount ranging from 50 to 100 grams per liter of water; (b) sulfuric acid in an amount ranging from 20 to 100 grams per liter of water; (c) nonylphenoxy-poly(ethyleneoxy)ethanol having a molecular weight of from about 740 to 1600 in an amount ranging from 1.5 to 3.0 grams per liter of water; and (d) Guar gum resin in an amount ranging from 1.5 to 11.5 grams per liter of water.
Claim 3
Dependent Claim
25 words
A plating bath as claimed in claim 1 wherein the concentration of sulfuric acid ranges from about 40 to 80 grams per liter of water.
Claim 4
Dependent Claim
22 words
A plating bath as claimed in claim 1 wherein the concentration of stannous ion is about 75 grams per liter of water.
Claim 5
Dependent Claim
23 words
A plating bath as claimed in claim 1 in which the concentration of nonylphenoxy-poly(ethyleneoxy)ethanol is from about 2 to 3 grams per liter.
Claim 6
Dependent Claim
25 words
A plating bath as claimed in claim 1 in which the concentration of Guar gum resin is from about 3.5 to 9.5 grams per liter.
Claim 7
Dependent Claim
92 words
An aqueous immersion plating bath for plating tin over zinc coated steel utilizing high speed roll coater applicators, said bath comprising: (a) stannous ion in an amount ranging from 65 to 85 grams per liter of water; (b) sulfuric acid in an amount of 40 to 80 grams per liter; (c) nonylphenoxy-poly(ethyleneoxy)ethanol having an average molecular weight of from about 800 to about 1540 in an amount of about 1.5 grams per liter of water; and, (d) a Guar gum resin in an amount of about 7.5 grams per liter of water.
Claim 8
Dependent Claim
92 words
An aqueous immersion plating bath for plating tin over zinc coated steel utilizing high speed roll coater applicators, said bath comprising: (a) stannous ion in an amount ranging from 65 to 85 grams per liter of water; (b) sulfuric acid in an amount of 40 to 80 grams per liter; (c) nonylphenoxy-poly(ethyleneoxy)ethanol having an average molecular weight of from about 800 to about 1540 in an amount of about 1.5 grams per liter of water; and, (d) a Guar gum resin in an amount of about 7.5 grams per liter of water.
Claim 9
Dependent Claim
22 words
A plating bath as claimed in claim 6 in which said nonylphenoxy-poly(ethyleneoxy)ethanol has a molecular weight of from about 1100 to 1540.
Claim 10
Independent Claim
149 words
A method of immersion plating tin over zinc coated steel web on a continuous basis by roll coating application comprising the steps of: (a) continuously running the coated steel web through a tin plating bath having the following composition: 1. about 65 to 85 grams of stannous ion per liter of water; 2. sulfuric acid in an amount of 40 to 80 grams per liter of water; 3. nonylphenoxy-poly(ethyleneoxy)ethanol in an amount of about 1.5 grams per liter and having an average molecular weight of from about 800 to about 1540; and, 4. Guar gum resin in amount of about 7.5 grams per liter of water; (b) applying a wet film to said web in a thickness ranging from about 3.0 to 4.0 mils; (c) contacting the strip with the bath for about 10 to 20 seconds; and, (d) operating said bath at a temperature of approximately 24° C.
Claim 11
Independent Claim
149 words
A method of immersion plating tin over zinc coated steel web on a continuous basis by roll coating application comprising the steps of: (a) continuously running the coated steel web through a tin plating bath having the following composition: 1. about 65 to 85 grams of stannous ion per liter of water; 2. sulfuric acid in an amount of 40 to 80 grams per liter of water; 3. nonylphenoxy-poly(ethyleneoxy)ethanol in an amount of about 1.5 grams per liter and having an average molecular weight of from about 800 to about 1540; and, 4. Guar gum resin in amount of about 7.5 grams per liter of water; (b) applying a wet film to said web in a thickness ranging from about 3.0 to 4.0 mils; (c) contacting the strip with the bath for about 10 to 20 seconds; and, (d) operating said bath at a temperature of approximately 24° C.
Claim 12
Dependent Claim
25 words
A method of immersion plating as claimed in claim 8 in which said nonylphenoxy-poly(ethyleneoxy)ethanol has a molecular weight of from about 1100 to about 1540.
Claim 13
Independent Claim
39 words
A method of immersion plating tin over zinc coated steel web on a continuous basis by roll coating application comprising the steps of: (a) continuously running the coated steel web through a tin plating bath having the following composition:
Claim 14
Independent Claim
39 words
A method of immersion plating tin over zinc coated steel web on a continuous basis by roll coating application comprising the steps of: (a) continuously running the coated steel web through a tin plating bath having the following composition:
Claim 15
Dependent Claim
126 words
about 50 to 100 grams of stannous ion per liter of water; 2. about 20 to 100 grams of sulfuric acid per liter of water; 3. 1.5 to 3.0 grams of nonylphenoxy-poly(ethyleneoxy)ethanol having a molecular weight of from about 740 to about 1600 per liter of water; and 4. 1.5 to 11.5 grams of Guar gum resin per liter of water; (b) applying a wet film to said web in a thickness ranging from about 3.0 to 4.0 mils; (c) contacting the strip with the bath for about 10 to 20 seconds; (d) operating said bath at a temperature in the range of 15.5° C. to 43.3° C.; and (e) plating a tin coating onto said strip in a thickness ranging from 14 to 127 microinches.
Claim 16
Dependent Claim
126 words
about 50 to 100 grams of stannous ion per liter of water; 2. about 20 to 100 grams of sulfuric acid per liter of water; 3. 1.5 to 3.0 grams of nonylphenoxy-poly(ethyleneoxy)ethanol having a molecular weight of from about 740 to about 1600 per liter of water; and 4. 1.5 to 11.5 grams of Guar gum resin per liter of water; (b) applying a wet film to said web in a thickness ranging from about 3.0 to 4.0 mils; (c) contacting the strip with the bath for about 10 to 20 seconds; (d) operating said bath at a temperature in the range of 15.5° C. to 43.3° C.; and (e) plating a tin coating onto said strip in a thickness ranging from 14 to 127 microinches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |