US5200057A
Expired / Lapsed
US
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Additive composition, acid zinc and zinc-alloy plating baths and methods for electrodedepositing zinc and zinc alloys
Assignee: Mcgean Rohco Inc
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Filing: 1991-11-05
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Granted: 1993-04-06
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Expires: 2011-11-05
Abstract
Abstract An additive composition is described with comprises a mixture of (a) poly(N-vinyl-2-pyrrolidone), and p0 (b) at least one sulfur-containing compound selected from compounds of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100. This additive composition is useful in acidic plating baths containing zinc or a mixture of zinc ions and at least one additional metal selected from nickel and cobalt. The plating baths also contain chloride ions or a mixture of chloride and sulfate ions.
Inventors
- 👤 Valerie M. Canaris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
70 words
An additive composition comprising a mixture of (a) poly(N-vinyl-2-pyrrolidone), and (b) at least one sulfur-containing compound selected from compounds of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100.
Claim 2
Dependent Claim
70 words
An additive composition comprising a mixture of (a) poly(N-vinyl-2-pyrrolidone), and (b) at least one sulfur-containing compound selected from compounds of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100.
Claim 3
Dependent Claim
32 words
The additive composition of claim 1 wherein the mixture comprises from about 10 to about 90 parts by weight of (a) and from about 10 to 90 parts by weight of (b).
Claim 4
Dependent Claim
16 words
The additive composition of claim 1 wherein the sulfur-containing compound (b) is characterized by Formula (II).
Claim 5
Dependent Claim
15 words
The additive composition of claim 1 also contains (c) at least one aromatic carbonyl-containing compound.
Claim 6
Dependent Claim
21 words
The additive composition of claim 4 wherein the aromatic carbonyl-containing compound (c) is an aromatic carboxylic acid or bath-soluble salt thereof.
Claim 7
Dependent Claim
92 words
An aqueous additive composition for aqueous acidic zinc and zinc alloy electroplating baths comprising water, and (a) from about 10 to about 60 g/l of poly(N-vinyl-2-pyrrolidone), and (b) from about 25 to about 150 g/l of at least one sulfur-containing compound of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100.
Claim 8
Dependent Claim
92 words
An aqueous additive composition for aqueous acidic zinc and zinc alloy electroplating baths comprising water, and (a) from about 10 to about 60 g/l of poly(N-vinyl-2-pyrrolidone), and (b) from about 25 to about 150 g/l of at least one sulfur-containing compound of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100.
Claim 9
Dependent Claim
26 words
The aqueous additive composition of claim 6 also containing (c) from 50 to 200 g/l of at least one aromatic carboxylic acid or bath-soluble salt thereof.
Claim 10
Dependent Claim
110 words
An aqueous acidic plating bath for electrodepositing zinc or a zinc alloy on a substrate comprising water and (a) zinc ions or a mixture of zinc ions and at least one additional metal selected from nickel and cobalt, (b) chloride ions, or a mixture of chloride and sulfate ions, (c) a poly(N-vinyl-2-pyrrolidone), and (d) at least one sulfur-containing compound of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100.
Claim 11
Dependent Claim
110 words
An aqueous acidic plating bath for electrodepositing zinc or a zinc alloy on a substrate comprising water and (a) zinc ions or a mixture of zinc ions and at least one additional metal selected from nickel and cobalt, (b) chloride ions, or a mixture of chloride and sulfate ions, (c) a poly(N-vinyl-2-pyrrolidone), and (d) at least one sulfur-containing compound of the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 100.
Claim 12
Dependent Claim
34 words
The plating bath of claim 8 wherein the sulfur-containing compound is prepared by reacting one mole of hydrogen sulfide or 2-hydroxyethyl sulfide with up to about 150 moles of ethylene oxide or propylene oxide.
Claim 13
Dependent Claim
15 words
The plating bath of claim 8 also containing (e) at least one aromatic carbonyl-containing compound.
Claim 14
Dependent Claim
23 words
The plating bath of claim 10 wherein the aromatic carbonyl-containing compound is an aromatic aldehyde, ketone or carboxylic acid or bath-soluble salt thereof.
Claim 15
Dependent Claim
20 words
The plating bath of claim 10 wherein the aromatic carbonyl-containing compound is an aromatic carboxylic acid or bath-soluble salt thereof.
Claim 16
Dependent Claim
13 words
The plating bath of claim 8 also containing at least one anti-foaming agent.
Claim 17
Dependent Claim
25 words
The plating bath of claim 10 wherein the bath contains a mixture of an aromatic carboxylic acid or bath-soluble salt thereof and an aromatic ketone.
Claim 18
Dependent Claim
93 words
An aqueous acidic plating bath for electrodepositing zinc on a substrate which comprises (a) zinc ions (b) chloride ions (c) an amount sufficient to provide a bright zinc deposit of a mixture of (c-1) a poly(N-vinyl-2-pyrrolidone) and (c-2) a sulfur-containing compound characterized by the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 50.
Claim 19
Dependent Claim
93 words
An aqueous acidic plating bath for electrodepositing zinc on a substrate which comprises (a) zinc ions (b) chloride ions (c) an amount sufficient to provide a bright zinc deposit of a mixture of (c-1) a poly(N-vinyl-2-pyrrolidone) and (c-2) a sulfur-containing compound characterized by the formulae RS(R'O).sub.n H (I) or S--[(R'O).sub.n H].sub.2 (II) wherein R is hydrogen or an alkyl group containing up to about 24 carbon atoms, each R' is independently an alkylene group containing 2 or 3 carbon atoms, and each n is independently an integer of from 1 to about 50.
Claim 20
Dependent Claim
22 words
The plating bath of claim 15 wherein the mixture (c) contains 10-50 parts by weight of (c-1) and 50-90 parts of (c-2).
Claim 21
Dependent Claim
31 words
The plating bath of claim 15 wherein the sulfur-containing compound (c-2) is prepared by reacting hydrogen sulfide or 2-hydroxyethyl sulfide with up to 100 moles of ethylene oxide or propylene oxide.
Claim 22
Dependent Claim
29 words
The plating bath of claim 15 wherein the sulfur-containing compound (c-2) is obtained by reacting hydrogen sulfide or 2-hydroxyethyl sulfide with from 15 to 40 moles of ethylene oxide.
Claim 23
Dependent Claim
30 words
The plating bath of claim 15 containing from about 0.1 to about 10 g/l of bath of (c-1) and from about 0.1 to about 15 g/l of bath of (c-2).
Claim 24
Dependent Claim
27 words
The plating bath of claim 15 also containing (d) at least one aromatic carbonyl-containing compound selected from aromatic aldehydes, ketones and carboxylic acids or bath-soluble salts thereof.
Claim 25
Dependent Claim
20 words
The plating bath of claim 20 wherein the aromatic carbonyl-containing compound is an aromatic carboxylic acid or bath-soluble salt thereof.
Claim 26
Dependent Claim
21 words
The plating bath of claim 15 also containing (e) at least one anionic aromatic sulfonic acid condensate or bath-soluble salt thereof.
Claim 27
Dependent Claim
23 words
The plating bath of claim 22 wherein the sulfonic acid condensate is obtained by the polycondensation of formaldehyde and an aromatic sulfonic acid.
Claim 28
Dependent Claim
14 words
The plating bath of claim 15 also containing (f) at least one nonionic surfactant.
Claim 29
Dependent Claim
21 words
The plating bath of claim 24 wherein the nonionic surfactant (f) is an ethoxylated aliphatic alcohol, alkyl phenol, or fatty acid.
Claim 30
Dependent Claim
27 words
The plating bath of claim 24 wherein the nonionic surfactant (f) is a tridecyl alcohol ethoxylated with from about 7 to about 30 moles of ethylene oxide.
Claim 31
Dependent Claim
36 words
A method of electrodepositing a bright zinc or zinc alloy coating on a substrate which comprises electroplating said substrate in an aqueous acidic zinc or zinc alloy plating bath containing the additive composition of claim 1.
Claim 32
Dependent Claim
26 words
A method of electroplating a bright zinc coating on a substrate which comprises electroplating said substrate in an aqueous acidic zinc plating bath of claim 15.
References Cited (Backward Citations)
No citation records indexed.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |