Nickel-plating additive and satin nickel-plating bath containing same

Abstract

Provided are a technique with which a satin-like appearance can be obtained in nickel-plating by a nickel-plating additive characterized by containing a benzethonium salt, a satin nickel-plating bath containing the same, and a satin nickel-plating method using the same.

1 . A nickel-plating additive, comprising
 a benzethonium salt.   
     
     
         2 . The nickel-plating additive according to  claim 1 , wherein the benzethonium salt is benzethonium chloride. 
     
     
         3 . The nickel-plating additive according to  claim 1 , further comprising
 a quaternary ammonium compound.   
     
     
         4 . The nickel-plating additive according to  claim 3 , wherein the quaternary ammonium compound is represented by a formula (1): 
       
         
           
           
               
               
           
         
       
       where R1, R2, R3, and R4 are independently selected from the group consisting of a C 1 -C 18  linear or branched alkyl, a C 1 -C 18  linear or branched alkenyl, and benzyl; and X −  is selected from the group consisting of a chloride ion, a bromine ion, and a sulfate ion. 
     
     
         5 . The nickel-plating additive according to  claim 4 , wherein the quaternary ammonium compound represented by the formula (1) is at least one selected from the group consisting of benzyl dimethyl dodecyl ammonium chloride, benzyl dimethyl tetradecyl ammonium chloride, benzyl dimethyl hexadecyl ammonium chloride, benzyl dimethyl stearyl ammonium chloride, benzyl dimethyl oleyl ammonium chloride, dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, didecyl dimethyl ammonium chloride, and didodecyl dimethyl ammonium chloride. 
     
     
         6 . The nickel-plating additive according to  claim 3 , wherein the quaternary ammonium compound is a betaine. 
     
     
         7 . The nickel-plating additive according to  claim 6 , wherein the betaine is at least one selected from the group consisting of alkyl dimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, and fatty acid amidopropyl dimethylaminoacetic acid betaine. 
     
     
         8 . The nickel-plating additive according to  claim 1 , further comprising
 a nonionic surfactant.   
     
     
         9 . A nickel-plating additive kit, comprising:
 (a) a first chemical solution comprising a benzethonium salt; and   (b) a second chemical solution comprising a quaternary ammonium compound.   
     
     
         10 . The nickel-plating additive kit according to  claim 9 , wherein the second chemical solution further comprises a nonionic surfactant. 
     
     
         11 . A satin nickel-plating bath, comprising
 the nickel-plating additive according to  claim 1  added to a nickel-plating bath.   
     
     
         12 . The satin nickel-plating bath according to  claim 11 , wherein a concentration of the benzethonium salt is from 0.0001 to 0.1 g/L. 
     
     
         13 . The satin nickel-plating bath according to  claim 11 , wherein the nickel-plating additive further comprises a quaternary ammonium compound and a concentration of the quaternary ammonium compound is from 0.0001 to 0.1 g/L. 
     
     
         14 . The satin nickel-plating bath according to  claim 11 , wherein the nickel-plating additive further comprises a nonionic surfactant and a concentration of the nonionic surfactant is from 0.0001 to 0.1 g/L. 
     
     
         15 . A satin nickel-plating method, comprising
 electroplating an object in the satin nickel-plating bath according to  claim 11 .   
     
     
         16 . A satin nickel-coated product, obtained by the satin nickel-plating method according to  claim 15 .