US4545870A
Expired / Lapsed
US
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Aqueous acid plating bath and brightener composition for producing bright electrodeposits of tin
Assignee: COLUMBIA CHEMICAL Corp A CORP OF OH
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Filing: 1984-08-27
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Granted: 1985-10-08
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Expires: 2004-08-27
Abstract
Abstract A tin brightener for an electroplating bath contains various trialkoxybenzaldehydes for producing uniform desposits over a very broad current density range.
Inventors
- 👤 William E. Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:59
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/30; C25D3/32
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
72 words
A tin plating brightening composition, comprising; from about 0.2 to about 20 percent by weight of a primary tin brightener, said primary brightener selected from the group consisting of trialkoxybenzaldehydes having the following general formula: ##STR4## where R 1 , R 2 , and R 3 are the same or different and are methyl, ethyl, propyl, or isopropyl groups and from 1 to about 97 percent by weight of an organic acid.
Claim 2
Dependent Claim
72 words
A tin plating brightening composition, comprising; from about 0.2 to about 20 percent by weight of a primary tin brightener, said primary brightener selected from the group consisting of trialkoxybenzaldehydes having the following general formula: ##STR4## where R 1 , R 2 , and R 3 are the same or different and are methyl, ethyl, propyl, or isopropyl groups and from 1 to about 97 percent by weight of an organic acid.
Claim 3
Dependent Claim
63 words
The tin plating brightening composition according to claim 1, including from about 1 to about 96 percent by weight of at least one emulsifying agent selected from the group consisting of nonionic, modified nonionic, cationic, anionic, and amphoteric emulsifying agent, and combinations thereof, and wherein said organic acid is selected from the group consisting of acrylic acid and methacrylic acid, and combinations thereof.
Claim 4
Dependent Claim
22 words
The tin plating brightening composition according to claim 2, including from about 1 to about 80 percent by weight of a solvent.
Claim 5
Dependent Claim
26 words
The tin plating brightening composition according to claim 2, wherein said emulsifying agent is selected from the group consisting of a nonionic, and a modified nonionic.
Claim 6
Dependent Claim
50 words
The tin plating brightening composition according to claim 4 wherein said acid is methacrylic acid, wherein the amount of said methacylic acid is from about 5 to about 30 percent by weight, and wherein the amount of said emulsifying agent is from about 20 to about 50 percent by weight.
Claim 7
Dependent Claim
16 words
The tin plating brightening composition according to claim 5, wherein the primary brightener is a trimethoxybenzaldehyde.
Claim 8
Dependent Claim
15 words
The tin plating brightening composition according to claim 6, wherein the primary brightener is 2,3,4-trimethoxybenzaldehyde.
Claim 9
Dependent Claim
15 words
The tin plating brightening composition according to claim 6, wherein the primary brightener is 2,4,5-trimethoxybenzaldehyde.
Claim 10
Dependent Claim
15 words
The tin plating brightener composition according to claim 6, wherein the primary brightener is 2,4,6-trimethoxybenzaldehyde.
Claim 11
Dependent Claim
15 words
The tin plating brightening composition according to claim 6, wherein the primary brightener is 3,4,5-trimethoxybenzaldehyde.
Claim 12
Dependent Claim
15 words
The tin plating brightening composition according to claim 6, wherein the primary brightener is 2,3,5-trimethoxybenzaldehyde.
Claim 13
Dependent Claim
39 words
The tin plating brightening composition according to claim 6, wherein there is also present from about 0.2 to about 20 percent by weight of at least one compound selected from the group consisting of o-chlorobenzaldehyde, 2,6-dichlorobenzaldehyde, 2,4-dichlorobenzaldehyde, and 2-hydroxy-1-naphthaldehyde.
Claim 14
Dependent Claim
76 words
An aqueous acid electroplating bath containing stannous ions and sulfuric acid for producing electrodeposits of tin, comprising: from about 0.005 to about 0.5 grams per liter of bath solution of a primary brightener, said primary brightener being a compound selected from the group consisting of trialkoxybenzaldehydes having the following general formula: ##STR5## where R 1 , R 2 , and R 3 can be the same or different and are methyl, ethyl, propyl, or isopropyl groups.
Claim 15
Dependent Claim
76 words
An aqueous acid electroplating bath containing stannous ions and sulfuric acid for producing electrodeposits of tin, comprising: from about 0.005 to about 0.5 grams per liter of bath solution of a primary brightener, said primary brightener being a compound selected from the group consisting of trialkoxybenzaldehydes having the following general formula: ##STR5## where R 1 , R 2 , and R 3 can be the same or different and are methyl, ethyl, propyl, or isopropyl groups.
Claim 16
Dependent Claim
51 words
An aqueous acid electroplating bath according to claim 13, wherein the amount of the stannous ions is from about 10 grams to about 100 grams per liter of bath solution and wherein the amount of sulfuric acid is from about 50 to about 260 grams per liter of said bath solution.
Claim 17
Dependent Claim
42 words
The bath according to claim 13, including from about 2 to about 40 grams per liter of an emulsifying agent, said emulsifying agent is selected from the group consisting of nonionic, modified nonionic, anionic, cationic, and amphoteric emulsifying agents, and combinations thereof.
Claim 18
Dependent Claim
32 words
The bath according to claim 15, including from about 0.02 to about 5 grams per liter of a compound selected from the group consisting of acrylic acid, methacrylic acid, and combinations thereof.
Claim 19
Dependent Claim
25 words
The bath according to claim 16, wherein said emulsifying agent is selected from the group consisting of a nonionic and a modified nonionic emulsifying agent.
Claim 20
Dependent Claim
47 words
The bath according to claim 17, wherein said acid is methacrylic acid, wherein the amount of said methacrylic acid is from about 0.02 to about 1.0 grams per liter and wherein the amount of said emulsifying agent is from about 2 to about 10 grams per liter.
Claim 21
Dependent Claim
13 words
The bath according to claim 18, wherein the primary brightener is a trimethoxybenzaldehyde.
Claim 22
Dependent Claim
12 words
The bath according to claim 18, wherein the primary brightener is 2,3,4-trimethoxybenzaldehyde.
Claim 23
Dependent Claim
12 words
The bath according to claim 18, wherein the primary brightener is 2,4,5-trimethoxybenzaldehyde.
Claim 24
Dependent Claim
12 words
The bath according to claim 18, wherein the primary brightener is 2,4,6-trimethoxybenzaldehyde.
Claim 25
Dependent Claim
12 words
The bath according to claim 18, wherein the primary brightener is 2,3,5-trimethoxybenzaldehyde.
Claim 26
Dependent Claim
12 words
The bath according to claim 18, wherein the primary brightener is 3,4,5-trimethoxybenzaldehyde.
Claim 27
Dependent Claim
34 words
The bath according to claim 19, including from about 0.01 to about 0.5 grams per liter of bath of at least one compound selected from the group consisting of o-chlorobenzaldehyde, 2,6-dichlorobenzaldehyde, 2,4-dichlorobenzaldehyde, and 2-hydroxy-1-naphthaldehyde.
References Cited (Backward Citations)
US4072582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |