US3988219A
Expired / Lapsed
US
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Baths and additives for the electrodeposition of bright zinc
Assignee: Columbia Chemical Corp
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Filing: 1975-07-07
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Granted: 1976-10-26
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Expires: 1995-07-07
Abstract
Abstract It has been found that aminated polyepichlorohydrins prepared by reacting polyepichlorohydrin with an amine selected from the group consisting of secondary aliphatic amines and secondary alicyclic amines result in a zinc electroplating bath brightener. Additionally, an aqueous, acid electroplating bath containing the aminated polyepichlorohydrin as well as polyoxyethylene condensates, and aromatic aldehydes and ketones act synergistically to provide bright, lustrous electrodeposits of zinc.
Inventors
- 👤 William E. Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:42
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
136 words
A zinc brightener additive for an aqueous, acid zinc electroplating bath, comprising, an aminated polyepichlorohydrin, said polyepichlorohydrin prepared by reacting polyepichlorohydrin with an amine selected from the group consisting of secondary aliphatic amines and secondary alicyclic amines at a temperature of from about 110° C to about 170° C, the amount of said amines is such so that between 50 percent to 100 percent of the chloro groups in said polyepichlorohydrin is reacted, and from about 1 to about 99 percent by weight of an ethylene oxide condensation product wherein from about 6 to about 30 moles of ethylene oxide are condensed with 1 mole of a compound selected from the group consisting of a long chain fatty alcohol, a long chain fatty amine, a long chain fatty acid, a long chain alkyl phenol, and naphthol.
Claim 2
Dependent Claim
136 words
A zinc brightener additive for an aqueous, acid zinc electroplating bath, comprising, an aminated polyepichlorohydrin, said polyepichlorohydrin prepared by reacting polyepichlorohydrin with an amine selected from the group consisting of secondary aliphatic amines and secondary alicyclic amines at a temperature of from about 110° C to about 170° C, the amount of said amines is such so that between 50 percent to 100 percent of the chloro groups in said polyepichlorohydrin is reacted, and from about 1 to about 99 percent by weight of an ethylene oxide condensation product wherein from about 6 to about 30 moles of ethylene oxide are condensed with 1 mole of a compound selected from the group consisting of a long chain fatty alcohol, a long chain fatty amine, a long chain fatty acid, a long chain alkyl phenol, and naphthol.
Claim 3
Dependent Claim
25 words
A zinc additive according to claim 1 including from about 1 percent to about 20 percent by weight of an aromatic aldehyde or aromatic ketone.
Claim 4
Dependent Claim
15 words
A zinc additive brightener according to claim 2, wherein said aromatic ketone is benzylidene acetone.
Claim 5
Dependent Claim
47 words
A zinc additive brightener according to claim 1, wherein said amine is selected from the group consisting of dimethylamine, diethylamine, dipropylamine, diisopropylamine, methylethylamine, methyl propylamine, methyl isopropylamine, ethyl isopropylamine, N-methyl ethanolamine, N-methyl propanolamine, N-ethyl isopropanolamine, N-propyl propanolamine, N-propyl isopropanolamine, N-isopropyl isopropanolamine, diethanolamine, dipropanolamine, diisopropanolamine, morpholine, and piperidine.
Claim 6
Dependent Claim
23 words
A zinc brightener additive according to claim 4, wherein the molecular weight of said aminated polyepichlorohydrin ranges from about 1,000 to about 20,000.
Claim 7
Dependent Claim
27 words
A zinc additive brightener according to claim 1, wherein said ethylene oxide condensation product is a product resulting from a condensation of ethylene oxide and beta naphthol.
Claim 8
Dependent Claim
31 words
A zinc additive brightener according to claim 6, wherein there is present benzylidene acetone and the amount of said benzylidene acetone ranges from about 1 to about 20 percent by weight.
Claim 9
Dependent Claim
47 words
A zinc brightener additive according to claim 7, wherein said amine is selected from the group consisting of dimethylamine, diethylamine, dipropylamine, diisopropylamine, methylethylamine, methyl propylamine, methyl isopropylamine, ethyl isopropylamine, N-methyl ethanolamine, N-methyl propanolamine, N-ethyl isopropanolamine, N-propyl propanolamine, N-propyl isopropanolamine, N-isopropyl isopropanolamine, diethanolamine, dipropanolamine, diisopropanolamine, morpholine, and piperidine.
Claim 10
Dependent Claim
54 words
A zinc additive brightener according to claim 1, wherein said ethylene oxide condensation product is a product resulting from the condensation of ethylene oxide and a compound selected from the group consisting of a long chain fatty alcohol, a long chain fatty amine, a long chain fatty acid and a long chain alkyl phenol.
Claim 11
Dependent Claim
30 words
A zinc additive brightener according to claim 9, wherein there is present benzylidene acetone and wherein said benzylidene acetone ranges from about 1 percent to about 20 percent by weight.
Claim 12
Dependent Claim
47 words
A zinc brightener additive according to claim 10, wherein said amine is selected from the group consisting of dimethylamine, diethylamine, dipropylamine, diisopropylamine, methylethylamine, methyl propylamine, methyl isopropylamine, ethyl isopropylamine, N-methyl ethanolamine, N-methyl propanolamine, N-ethyl isopropanolamine, N-propyl propanolamine, N-propyl isopropanolamine, N-isopropyl isopropanolamine, diethanolamine, dipropanolamine, diisopropanolamine, morpholine, and piperidine.
Claim 13
Dependent Claim
66 words
An aqueous, acid zinc electroplating bath containing zinc ions for producing a bright electrodeposit of zinc comprising, having dissolved therein from about 1 to about 10 grams/liter of aminated polyepichlorohydrin, from about 1 to about 10 grams/liter of an ethylene oxide condensation product, and about 0.05 to about 0.5 grams/liter of at least one compound selected from the group consisting of aromatic aldehyde and aromatic ketone.
Claim 14
Dependent Claim
66 words
An aqueous, acid zinc electroplating bath containing zinc ions for producing a bright electrodeposit of zinc comprising, having dissolved therein from about 1 to about 10 grams/liter of aminated polyepichlorohydrin, from about 1 to about 10 grams/liter of an ethylene oxide condensation product, and about 0.05 to about 0.5 grams/liter of at least one compound selected from the group consisting of aromatic aldehyde and aromatic ketone.
Claim 15
Dependent Claim
65 words
The bath of claim 12, wherein said aminated polyepichlorohydrin is prepared by reacting polyepichlorohydrin with an amine selected from the group consisting of secondary aliphatic amines and secondary alicyclic amines at a temperature of about 110° C to about 170° C, the amount of said amines is such so that between 50 percent and 100 percent of the chloro groups of said polyepichlorohydrin are reacted.
Claim 16
Dependent Claim
72 words
The bath of claim 13, wherein said ethylene oxide condensation product is formed by condensing at least 6 to about 30 moles of ethylene oxide with 1 mole of a compound selected from the group consisting of a long chain fatty alcohol, a long chain fatty amine, a long chain fatty acid and a long chain alkyl phenol wherein said long chain has from 6 to about 30 carbon atoms and naphthol.
Claim 17
Dependent Claim
19 words
A bath according to claim 14, wherein the pH of the solution is from about 4.0 to about 6.3.
Claim 18
Dependent Claim
52 words
A bath according to claim 15, wherein said secondary aliphatic amine and said secondary alicyclic amine is selected from the group consisting of dimethylamine, diethylamine, dipropylamine, diisopropylamine, methylethylamine, methyl propylamine, methyl isopropylamine, ethyl isopropylamine, N-methyl ethanolamine, N-methyl propanolamine, N-methyl isopropanolamine, N-ethyl propanolamine, N-ethyl isopropanolamine, N-isopropyl isopropanolamine, diethanolamine, dipropanolamine, diisopropanolamine, morpholine, and piperidine.
Claim 19
Dependent Claim
27 words
The bath of claim 16, wherein said ethylene oxide is condensed with a compound selected from the group consisting of beta naphthol, nonyl phenol, and nonyl alcohol.
Claim 20
Dependent Claim
32 words
The bath of claim 15, wherein said aromatic aldehydes and aromatic ketones are selected from the group consisting of benzylidene acetone, vanillan, heliotropin, anisaldehyde, veratraldehyde, acetophenone, acetonaphthone, cinnamic aldehyde, 2-chlorobenzaldehyde, and 2,6-dichlorobenzaldehyde.
Claim 21
Dependent Claim
17 words
The bath composition of claim 18, wherein said amines have from 2 to about 6 carbon atoms.
Claim 22
Dependent Claim
17 words
The bath of claim 18, wherein said temperature is from about 120° C to about 150° C.
Claim 23
Dependent Claim
24 words
The bath of claim 20, wherein said ethylene oxide condensation product is a product resulting from the condensation of ethylene oxide and beta naphthol.
Claim 24
Dependent Claim
12 words
The bath of claim 21, wherein said aromatic ketone is benzylidene acetone.
Claim 25
Dependent Claim
19 words
The bath of claim 20, wherein the molecular weight of said polyepichlorohydrin is from about 1,000 to about 20,000.
Claim 26
Dependent Claim
19 words
The bath of claim 20, wherein the molecular weight of said polyepichlorohydrin is from about 1,000 to about 5,000.
Claim 27
Dependent Claim
13 words
The bath composition of claim 18, wherein the aromatic ketone is benzylidene acetone.
Claim 28
Dependent Claim
8 words
The bath of claim 18, including ammonium chloride.
Claim 29
Dependent Claim
18 words
The bath of claim 26, including from about 100 to about 300 grams per liter of ammonium chloride.
Claim 30
Dependent Claim
21 words
The bath of claim 18, wherein the range of zinc ions is from about 7.5 to about 40 grams per liter.
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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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |