US3723262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid zinc electroplating
Assignee: EIDP Inc
•
Filing: 1972-02-15
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Granted: 1973-03-27
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Expires: 1992-02-15
Abstract
Abstract Brightening additives for acid zinc electroplating baths and processes are provided. The additive is an acrylate selected from the group consisting of (1) an acrylate monomer of the general formula: WHEREIN R is methyl or hydrogen, R'' is alkyl of one to four carbon atoms, N IS A POSITIVE WHOLE INTEGER OF 1 TO 3, INCLUSIVE, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2C*CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent when R'''' is CH2CH2COO or -CH2CH2CH2SO3 ; (2) a homopolymer of said acrylate monomer and (3) a copolymer of said acrylate monomer with at least one ethylenically unsaturated monomer selected from the group consisting of an Alpha , Beta -ethylenically unsaturated monocarboxylic acid, and alkyl ester of said acid wherein the alkyl group is from one to four carbon atoms, acrylonitrile, acrylamide, methacrylamide, vinyl acetate, vinyl sulfone and vinyl pyridine, the molar ratio of said acrylate monomer to said vinyl monomer being within the range of 0.9:0.1 to 0.1:0.9.
Inventors
- 👤 J Rushmere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:54
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C09; C09D; C09D5/00; C09D5/44; C09D5/4407; C09D5/4411; C25D3/22
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
149 words
The acid electroplating bath of claim 1 wherein the acrylate is a copolymer of an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is methyl or ethyl, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2CH * CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent when R'''' is -CH2CH2COO or -CH2CH2CH2SO3 with at least one ethylenically unsaturated monomer selected from the group consisting of an Alpha , Beta -ethylenically unsaturated monocarboxylic acid, an alkyl ester of said acid wherein the alkyl group is from one to four carbon atoms, acrylonitrile, acrylamide, methacrylamide, vinyl acetate, vinyl sulfone and vinyl pyridine, the copolymer having a molar ratio of said acrylate monomer to said unsaturated monomer being within the range of 0.7/0.3 to 0.3/0.7.
Claim 2
Dependent Claim
27 words
The acid electroplating bath of claim 2 wherein the copolymer is about 30 molar percent 2-methacryloxyethyl trimethyl ammonium methyl sulfate and about 70 molar percent methacrylic acid.
Claim 3
Dependent Claim
22 words
The acid electroplating bath of claim 3 wherein the pH of the bath is within the range of about 3.5 to 4.5.
Claim 4
Dependent Claim
15 words
The acid electroplating bath of claim 2 wherein the ethylenically unsaturated monomer is methacrylic acid.
Claim 5
Dependent Claim
32 words
The acid electroplating bath of claim 2 wherein the pH of the bath is within the range of about 3.5 to 4.5 and the copolymer concentration is aBout 0.1 to 1 g./l.
Claim 6
Dependent Claim
26 words
The acid electroplating bath of claim 1 wherein the acrylate is added to give a bath concentration within the range of about 0.05 to 5 g./l.
Claim 7
Dependent Claim
31 words
The acid electroplating bath of claim 7 wherein the pH of the bath is within the range of about 3.5 to 4.5 and the acrylate concentration is 0.1 to 1 g./l.
Claim 8
Dependent Claim
75 words
The acid electroplating bath of claim 1 wherein the acrylate is an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is methyl or ethyl, R'''' is alkyl of 1 to 4 carbon atoms, -CH2CH CH2, -CH2C*CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent when R'''' is -CH2CH2COO or -CH2CH2CH2SO3 .
Claim 9
Dependent Claim
22 words
The acid electroplating bath of claim 9 wherein the pH of the bath is within the range of about 3.5 to 4.5.
Claim 10
Dependent Claim
80 words
The acid electroplating bath of claim 1 wherein the acrylate is a homopolymer of an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is methyl or ethyl, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2CH * CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent when R'''' is -CH2CH2COO or -CH2CH2CH2SO3 .
Claim 11
Dependent Claim
22 words
The acid electroplating bath of claim 11 wherein the pH of the bath is within the range of about 3.5 to 4.5.
Claim 12
Dependent Claim
220 words
In a process of electroplating bright zinc from an aqueous acid zinc electroplating bath having a zinc salt dissolved therein the improvement comprising maintaining said bath at a pH in the range of about 2.5 to 5.5 and adding thereto in an amount effective to give a bright zinc deposit an acrylate selected from the group consisting of (1) an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is alkyl of one to four carbon atoms, n is a positive whole integer of 1 to 3 inclusive, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2C*CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent from R'''' is -CH2CH2COO or -CH2CH2CH2SO3 ; (2) a homopolymer of said acrylate monomer and (3) a copolymer of said acrylate monomer with at least one ethylenically unsaturated monomer selected from the group consisting of an Alpha , Beta -ethylenically unsaturated monocarboxylic acid, an alkyl ester of said acid wherein the alkyl group is from one to four carbon atoms, acrylonitrile, acrylamide, methacrylamide, vinyl acetate, vinyl sulfone and vinyl pyridine, the molar ratio of said acrylate monomer to said unsaturated monomer being wIthin the range of 0.9:0.1 to 0.1:0.9.
Claim 13
Dependent Claim
24 words
The process of claim 13 wherein the acrylate is added to give a bath concentration within the range of about 0.05 to 5 g./l.
Claim 14
Dependent Claim
50 words
The process of claim 14 wherein the acrylate is added to give a bath concentration within the range of about 0.1 to 1 g./l., the pH is maintained within the range of about 3.5 to 4.5 and the bath is at a temperature in the range of 15* to 45*C.
Claim 15
Dependent Claim
161 words
The process of claim 15 wherein the acrylate is a copolymer of an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is methyl or ethyl, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2CH * CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent when R'''' is -CH2CH2COO or -CH2CH2CH2SO3 with at least one ethylenically unsaturated monomer selected from the group consisting of an Alpha , Beta -ethylenically unsaturated monocarboxylic acid, an alkyl ester of said acid wherein the alkyl group is from one to four carbon atoms, acrylonitrile, acrylamide, methacrylamide, vinyl acetate, vinyl sulfone and vinyl pyridine, the copolymer having a molar ratio of said acrylate monomer to said unsaturated monomer within the range of 0.7/0.3 to 0.3/0.7 and the bath is at a temperature in the range of about 20* to 30*C.
Claim 16
Dependent Claim
13 words
The process of claim 16 wherein the ethylenically unsaturated monomer is methacrylic acid.
Claim 17
Dependent Claim
25 words
The process of claim 16 wherein the copolymer is about 30 molar percent 2-methacryloxyethyl trimethyl ammonium methyl sulfate and about 70 molar percent methacrylic acid.
Claim 18
Dependent Claim
74 words
The process of claim 15 wherein the acrylate is an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is methyl or ethyl, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2C*CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3 SO4 , C2H5SO4 , halide or is absent when R'''' is -CH2CH2COO or -CH2CH2CH2SO3 .
Claim 19
Dependent Claim
78 words
The process of claim 15 wherein the acrylate is a homopolymer of an acrylate monomer of the general formula: wherein R is methyl or hydrogen, R'' is methyl or ethyl, R'''' is alkyl of one to four carbon atoms, -CH2CH CH2, -CH2CH * CH, -CH2COOCH3, -CH2COOC2H5, -CH2COR where R is as defined above, -CH2CONH2, -CH2CN, -CH2CH2OH, -CH2CH2COO or -CH2CH2CH2SO3 , and X is CH3SO4 , C2H5SO4 , halide or is absent when R'''' is -CH2CH2COO or -CH2CH2CH2SO3 .
References Cited (Backward Citations)
CA759424A
Cited
US2798040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |