US3853718A
Expired / Lapsed
US
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Method to improve zinc deposition employing multi-nitrogen quaternaries
Assignee: Oxy Metal Finishing Corp
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Filing: 1973-01-05
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Granted: 1974-12-10
•
Expires: 1993-01-05
Abstract
Abstract An alkaline electroplating bath comprising alkali metal zincate, and an effective zinc brightening amount of a bath soluble multiple quaternary compound which is the reaction product of a polyalkylene imine and an organic ammonium halide which contains a halogen which will quaternarize a nitrogen of the polyalkylene imine.
Inventors
- 👤 H Creutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:11
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
88 words
AN AQUEOUS ALKALINE ZINC ELECTROPLATING BATH COMPRISING ALKALI METAL ZINCATE, AND ABOUT 0.5 TO ABOUT 50 GRAMS PER LITER OF A ZINC BRIGHTENING AGENT IN THE FORM OF A THAT SOLUTION MULTI: PLE QUATERNARY COMPOUND WHICH IS THE REACTION PRODUCT OF A POLYALKYLENE IMINE HAVING A MOLECULAR WEIGHT FROM ABOUT 300 TO 1,000.000, AND AN ORGANIC QUATERNARY AMMONIUM HALIDE WHICH CONTAINS A HALOGEN WHICH WILL QUATERNARY AMMONIUM HALIDE THE POLYALKYLENE IMINE IN A RATIO OF ONE MOLE OF ORGANIC AMMONIUM HALIDE TO TWO MOLE-UNITS OF THE POLYALKYLENE IMINE.
Claim 2
Dependent Claim
88 words
AN AQUEOUS ALKALINE ZINC ELECTROPLATING BATH COMPRISING ALKALI METAL ZINCATE, AND ABOUT 0.5 TO ABOUT 50 GRAMS PER LITER OF A ZINC BRIGHTENING AGENT IN THE FORM OF A THAT SOLUTION MULTI: PLE QUATERNARY COMPOUND WHICH IS THE REACTION PRODUCT OF A POLYALKYLENE IMINE HAVING A MOLECULAR WEIGHT FROM ABOUT 300 TO 1,000.000, AND AN ORGANIC QUATERNARY AMMONIUM HALIDE WHICH CONTAINS A HALOGEN WHICH WILL QUATERNARY AMMONIUM HALIDE THE POLYALKYLENE IMINE IN A RATIO OF ONE MOLE OF ORGANIC AMMONIUM HALIDE TO TWO MOLE-UNITS OF THE POLYALKYLENE IMINE.
Claim 3
Dependent Claim
24 words
The bath of claim 1, further comprising about 0.005 g/l to about 10 g/l of a third soluble nitrogen heterocyclic compound of the formula:
Claim 4
Dependent Claim
9 words
The bath of claim 2, wherein X is -S-.
Claim 5
Dependent Claim
9 words
The bath of claim 2, wherein X is -N-R3.
Claim 6
Dependent Claim
9 words
The bath of claim 2, wherein A is -C-S-(R3).
Claim 7
Dependent Claim
9 words
The bath of claim 2, wherein R3 is hydrogen.
Claim 8
Dependent Claim
14 words
The bath of claim 2, wherein the third nitrogen heterocyclic compound is amino benzothiazole.
Claim 9
Dependent Claim
14 words
The bath of claim 2, wherein the third nitrogen heterocyclic compound is an amino-2-mercaptobenzothiazole.
Claim 10
Dependent Claim
67 words
The bath of claim 1, wherein to produce the multiple quaternary compound, the imine is reacted with a compound of the formula; X - R - N (R'')3 X wherein R is selected from the group consisting of alkylene and hydroxy substituted alkylene; R'' is independently selected from the group consisting of hydrogen, alkyl, aryl, aralkyl and the hydroxy or halo derivatives thereof; and X is halogen.
Claim 11
Dependent Claim
12 words
The bath of claim 9, wherein R is a hydroxy substituted alkylene.
Claim 12
Dependent Claim
13 words
The bath of claim 10, wherein R contains up to three carbon atoms.
Claim 13
Dependent Claim
10 words
The bath of claim 9, wherein R is -CH2-CH(OH) CH2-.
Claim 14
Dependent Claim
15 words
The bath of claim 9, wherein R'' is alkyl of one to four carbon atoms.
Claim 15
Dependent Claim
18 words
The bath of claim 9, wherein the imine is the polymerization product of a compound of the formula;
Claim 16
Dependent Claim
25 words
The bath of claim 1, further comprising a second bath soluble quaternary nitrogen compound in the amount from about 0.005 g/l to about 5.0 g/l.
Claim 17
Dependent Claim
14 words
The bath of claim 15, wherein the second nitrogen compound is a heterocyclic compound.
Claim 18
Dependent Claim
28 words
The bath of claim 16, wherein the second quaternary compound is a pyridine compound present in an amount ranging from about 0.005 to about 5 grams per liter.
Claim 19
Dependent Claim
15 words
The bath of claim 17, wherein the pyridine compound is quaternized by a benzyl chloride.
Claim 20
Dependent Claim
31 words
The bath of claim 1, further comprising a zinc brightening agent containing an aldehyde group, said agent being present in an amount of between about 0.010 g/l to about 0.5 g/l.
Claim 21
Dependent Claim
10 words
The bath of claim 19, wherein the aldehyde is anisaldehyde.
Claim 22
Dependent Claim
12 words
The bath of claim 1, wherein the polyalkylene imine is polyethylene imine.
Claim 23
Dependent Claim
40 words
A method of depositing zinc from an alkaline zine electroplating bath, comprising passing an electric current from an anode through the bath of claim 1 to a cathodic workpiece for a period of time sufficient to form a zinc deposit.
Claim 24
Dependent Claim
25 words
The method of claim 22, further comprising about 0.005 g/l to about 10 g/l of a third bath soluble nitrogen heterocyclic compound of the formula;
Claim 25
Dependent Claim
9 words
The method of claim 23, wherein X is -S-.
Claim 26
Dependent Claim
9 words
The method of claim 23, wherein X is -N-R3.
Claim 27
Dependent Claim
9 words
The method of claim 23, wherein A is -C-S(R3).
Claim 28
Dependent Claim
9 words
The method of claim 23, wherein R3 is hydrogen.
Claim 29
Dependent Claim
13 words
The method of claim 23, wherein the nitrogen heterocyclic compound is amino benzothiazole.
Claim 30
Dependent Claim
13 words
The method of claim 23, wherein the nitrogen heterocyclic compound is an amino-2-mercaptobenzothiazole.
Claim 31
Dependent Claim
64 words
The method of claim 22, wherein the imine is reacted with a compound of the formula; X - R - N (R'')3 X wherein R is selected from the group consisting of alkylene, and hydroxy substituted alkylene; R'' is independently selected from the group consisting of hydrogen, alkyl, aryl, aralkyl, and the hydroxy or halo substituted derivative thereof; and wherein X is a halogen.
Claim 32
Dependent Claim
12 words
The method of claim 30, wherein R is a hydroxy substituted alkylene.
Claim 33
Dependent Claim
13 words
The method of claim 30, wherein R contains up to three carbon atoms.
Claim 34
Dependent Claim
11 words
The method of claim 30, wherein R is -CH2-CH (OH) CH2-.
Claim 35
Dependent Claim
15 words
The method of claim 30, wherein R'' is alkyl or one to four carbon atoms.
Claim 36
Dependent Claim
18 words
The method of claim 30, wherein the imine is the polymerization product of a compound of the formula;
Claim 37
Dependent Claim
25 words
The method of claim 22, further comprising a second bath soluble quarternary nitrogen compound in the amount from about 0.005 g/l to about 5.0 g/l.
Claim 38
Dependent Claim
27 words
The method of claim 36, wherein the quaternary compound is a pyridine compound present in an amount ranging from about 0.005 to about 5 grams per liter.
Claim 39
Dependent Claim
15 words
The method of claim 37, wherein the pyridine compound is quaternized by a benzyl chloride.
Claim 40
Dependent Claim
14 words
The method of claim 36, wherein the second nitrogen compound is a heterocyclic compound.
Claim 41
Dependent Claim
31 words
The method of claim 22, further comprising a zinc brightening agent containing an aldehyde group, said agent being present in an amount of between about 0.010 g/l to about 0.5 g/l.
Claim 42
Dependent Claim
10 words
The method of claim 40, wherein the aldehyde is anisaldehyde.
Claim 43
Dependent Claim
12 words
The method of claim 22, wherein the polyalkylene imine is polyethylene imine.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |