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US4600609A
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Method and composition for electroless nickel deposition
Assignee: MacDermid Acumen Inc
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Filing: 1985-05-03
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Granted: 1986-07-15
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Expires: 2005-05-03
Abstract
Abstract An electroless nickel plating method and composition is disclosed wherein a soluble acetylenic compound is included within the plating bath in small amounts effective to improve the specularity of the nickel deposit without substantially decreasing the electroless plating rate of the bath. The method and compositions of the invention are useful in producing mirror-bright electroless nickel coatings free of haze.
Inventors
- 👤 Harold Leever
- 👤 Leo J. Slominski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:29
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
161 words
In a method for depositing a metal coating consisting essentially of nickel on the surface or surfaces of a substrate, comprising immersing said substrate in an aqueous solution comprising as ingredients a source of nickel ions, a soluble reducing agent for the nickel, a metal complexing agent and pH adjusting agents under conditions effective to bring about electroless deposition of nickel on said surface or surfaces by means of chemical reduction; the improvement comprising including a soluble acetylenic compound as an ingredient in said solution in an amount effective to improve the brightness of said nickel coating, the particular ingredients of said solution and their concentrations therein being such as to provide said bright nickel coating without substantially decreasing the electrodes depositing rate of the solution, as compared to the depositing rate obtained with a corresponding solution not containing acetylenic compound, said effective amount of said acetylenic compound being in excess of about 100 ppm when said acetylenic compound is butynediol.
Claim 2
Dependent Claim
161 words
In a method for depositing a metal coating consisting essentially of nickel on the surface or surfaces of a substrate, comprising immersing said substrate in an aqueous solution comprising as ingredients a source of nickel ions, a soluble reducing agent for the nickel, a metal complexing agent and pH adjusting agents under conditions effective to bring about electroless deposition of nickel on said surface or surfaces by means of chemical reduction; the improvement comprising including a soluble acetylenic compound as an ingredient in said solution in an amount effective to improve the brightness of said nickel coating, the particular ingredients of said solution and their concentrations therein being such as to provide said bright nickel coating without substantially decreasing the electrodes depositing rate of the solution, as compared to the depositing rate obtained with a corresponding solution not containing acetylenic compound, said effective amount of said acetylenic compound being in excess of about 100 ppm when said acetylenic compound is butynediol.
Claim 3
Dependent Claim
57 words
The method according to claim 1 wherein said soluble acetylenic compound corresponds to the formula R.sub.1 --C.tbd.C--R.sub.2 wherein at least one of R 1 and R 2 is a solubilizing group and the other substituent, if not a solubilizing group, is selected from the group consisting of hydrogen, halogen, diethylaminoethyl, morpholinomethyl, alkyl, alkenyl, alkynyl and cyano radicals.
Claim 4
Dependent Claim
26 words
The method according to claim 2 wherein said solubilizing group is selected from the group consisting of hydroxy, hydroxymethyl, hydroxyethyl, hydroxypropyl, methoxy, carboxy, hydroxyethoxy and sulfonate.
Claim 5
Dependent Claim
26 words
The method according to claim 1 wherein said acetylenic compound is selected from the group consisting of ethyoxylated acetylenic compounds, propoxylated acetylenic compounds and mixtures thereof.
Claim 6
Dependent Claim
13 words
The method according to claim 4 wherein said acetylenic compound is ethoxylated butynediol.
Claim 7
Dependent Claim
34 words
The method according to claim 1 wherein the acetylenic compound, except in the case of butynediol, is present at a solution concentration in the range of from about 10 ppm to about 1000 ppm.
Claim 8
Independent Claim
38 words
The method according to either of claims 1 or 5 wherein the acetylenic compound, except in the case of butynediol, is present at a solution concentration in the range of from about 30 ppm to about 300 ppm.
Claim 9
Independent Claim
38 words
The method according to either of claims 1 or 5 wherein the acetylenic compound, except in the case of butynediol, is present at a solution concentration in the range of from about 50 ppm to about 300 ppm.
Claim 10
Dependent Claim
17 words
The method according to claim 1 wherein said solution further comprises a soluble source of metallic brightener.
Claim 11
Dependent Claim
25 words
The method according to claim 9 wherein said metallic brightener is selected from the group consisting of lead, cadmium, bismuth, antimony, molybdenum and mixtures thereof.
Claim 12
Dependent Claim
15 words
The method according to claim 1 wherein said solution further comprises a surface active agent.
Claim 13
Independent Claim
29 words
The method according to either of claims 1, 5 or 6 wherein said reducing agent is selected from the group consisting of an alkali metal hypophosphite and dimethylamine borane.
Claim 14
Dependent Claim
15 words
The method according to claim 1 wherein said substrate is composed of conductive metallic material.
Claim 15
Dependent Claim
14 words
The method according to claim 1 wherein said substrate is composed of nonconductive material.
Claim 16
Dependent Claim
118 words
In an aqueous electroless nickel plating solution consisting essentially of a source of nickel ions, a soluble reducing agent for nickel, a metal complexing agent and pH adjusting agents; the improvement comprising an effective amount of a soluble acetylenic compound in said solution as an ingredient to improve the brightness of the nickel coating, the particular ingredients of said solution and their concentrations therein being such as to provide said bright nickel coating without substantially decreasing the electroless depositing rate of the solution, as compared to the depositing rate obtained with a corresponding composition not containing acetylenic compound, said effective amount of said acetylenic compound being in excess of about 100 ppm when said acetylenic compound is butynediol.
Claim 17
Dependent Claim
118 words
In an aqueous electroless nickel plating solution consisting essentially of a source of nickel ions, a soluble reducing agent for nickel, a metal complexing agent and pH adjusting agents; the improvement comprising an effective amount of a soluble acetylenic compound in said solution as an ingredient to improve the brightness of the nickel coating, the particular ingredients of said solution and their concentrations therein being such as to provide said bright nickel coating without substantially decreasing the electroless depositing rate of the solution, as compared to the depositing rate obtained with a corresponding composition not containing acetylenic compound, said effective amount of said acetylenic compound being in excess of about 100 ppm when said acetylenic compound is butynediol.
Claim 18
Dependent Claim
57 words
The composition according to claim 15 wherein said soluble acetylenic compound corresponds to the formula R.sub.1 --C.tbd.C--R.sub.2 wherein at least one of R 1 and R 2 is a solubilizing group and the other substituent, if not a solubilizing group, is selected from the group consisting of hydrogen, halogen, diethylaminoethyl, morpholinomethyl, alkyl, alkenyl, alkynyl and cyano radicals.
Claim 19
Dependent Claim
26 words
The composition according to claim 16 wherein said solubilizing group is selected from the group consisting of hydroxy, hydroxymethyl, hydroxyethyl, hydroxypropyl, methoxy, carboxy, hydroxyethoxy and sulfonate.
Claim 20
Dependent Claim
26 words
The composition according to claim 15 wherein said acetylenic compound is selected from the group consisting of ethoxylated acetylenic compounds, propoxylated acetylenic compounds and mixtures thereof.
Claim 21
Dependent Claim
13 words
The composition according to claim 18 wherein said acetylenic compound is ethoxylated butynediol.
Claim 22
Dependent Claim
34 words
The composition according to claim 15 wherein the acetylenic compound, except in the case of butynediol, is present at a solution concentration in the range of from about 10 ppm to about 1000 ppm.
Claim 23
Dependent Claim
38 words
The composition according to either of claims 15 or 19 wherein the acetylenic compound, except in the case of butynediol, is present at a solution concentration in the range of from about 30 ppm to about 300 ppm.
Claim 24
Dependent Claim
38 words
The composition according to either of claims 15 or 19 wherein the acetylenic compound, except in the case of butynediol, is present at a solution concentration in the range of from about 50 ppm to about 300 ppm.
Claim 25
Dependent Claim
17 words
The composition according to claim 15 wherein said solution further comprises a soluble source of metallic brightener.
Claim 26
Dependent Claim
25 words
The composition according to claim 23 wherein said metallic brightener is selected from the group consisting of lead, cadmium, bismuth, antimony, molybdenum and mixtures thereof.
Claim 27
Dependent Claim
15 words
The composition according to claim 15 wherein said solution further comprises a surface active agent.
Claim 28
Dependent Claim
29 words
The composition according to either of claims 15, 19 or 20 wherein said reducing agent is selected from the group consisting of an alkali metal hypophosphite and dimethylamine borane.
Claim 29
Dependent Claim
23 words
The composition according to claim 15 wherein said complexing agent is present in stoichiometric excess over the level of nickel in said composition.
Claim 30
Dependent Claim
16 words
A substrate having a bright nickel electroless coating thereon produced by the method of claim 1.
Claim 31
Dependent Claim
15 words
The substrate according to claim 28 wherein said substrate is composed of conductive metallic material.
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| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
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