Acetylenic compositions and nickel plating baths containing same
AssigneeMcGean-Rohco, Inc.
InventorJames C. Cameron
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Abstract
A new acetylenic composition, 3-(2-propynoxy)-2-propenoic acid, and its methods of preparation are described. Also, acetylenic compositions are described which are prepared by the process which comprises the steps of (a) reacting propargyl alcohol with an alkali metal permanganate in an aqueous alkaline solution, (b) filtering the reaction mixture, and (c) acidifying the filtrate with acid. The acetylenic compositions prepared in this manner are useful in aqueous acidic plating baths for the electrodeposition of a bright nickel or nickel-iron alloy on a substrate. Methods for the electrodeposition of nickel and nickel-iron alloys from such baths as well as additive compositions for forming the baths are described.
Claims32
3-(2-propynoxy)-2-propenoic acid.
A method of preparing 3-(2-propynoxy)-2-propenoic acid which comprises reacting propiolic acid with propargyl alcohol in an aqueous alkaline solution and thereafter acidifying the reaction mixture.
An acetylenic composition prepared by a process comprising the steps of
- (a) reacting propargyl alcohol with an alkali metal permanganate in an aqueous alkaline solution,
- (b) filtering the reaction mixture, and
- (c) acidifying the filtrate with acid.
An acetylenic composition prepared by the process comprising the steps of
- (a) reacting about 1.5 parts of propargyl alcohol with about 0.1 to about 1.0 part of potassium permanganate in an aqueous alkaline solution at a pH of from about 9 to 11,
- (b) filtering the reaction mixture, and
- (c) acidifying the filtrate with acid to a pH less than about 2.
An aqueous acidic plating bath for the electrodeposition of nickel or a nickel-iron alloy on a substrate which bath comprises nickel ions, or a mixture of nickel ions and iron ions, and as a brightening and leveling agent, an effective amount of 3-(2-propynoxy)-2-propenoic acid.
Dependencies are inferred from the claim text.