Cyanide-free silver plating brightening agent and preparing method thereof

A technology of silver light and solvent, which is applied in the field of cyanide-free silver plating, can solve the problems of poor coating appearance and non-bright appearance, and achieve better wear resistance, refined grains, and obvious bright effect

Active Publication Date: 2020-09-04
GUANGZHOU SANFU NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found in practical applications that the use of domestic cyanide-free silver plating brighteners for cyanide-free silver plating systems with 5,5-dimethylhydantoin as a complexing agent has poor morphology and dull appearance. , so there is room for improvement

Method used

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  • Cyanide-free silver plating brightening agent and preparing method thereof
  • Cyanide-free silver plating brightening agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, cyanide-free silver plating brightener of the present invention and preparation method thereof

[0026] Cyanide-free silver plating brightener of the present invention, with deionized water as solvent, comprises the component of following concentration: sodium dodecyl diphenyl sulfonate 10g / L, HEDTA 1g / L, potassium dihydrogen phosphate 0.5g / L , β-naphthol polyoxyethylene ether 10g / L, polyethylene glycol 10g / L, urea 10g / L, 1-benzyl-1,2,3,4-tetrahydroisoquinoline 10g / L and 2- Methyltetrahydrofuran-3-thiol 30g / L.

[0027] The preparation method of cyanide-free silver plating brightener of the present invention comprises the following steps:

[0028] S1. Measure the amount of sodium dodecyl dibenzene sulfonate, β-naphthol polyoxyethylene ether, polyethylene glycol and HEDTA into deionized water, stir until completely dissolved, the stirring speed is 100r / min, the stirring time Be 20min, obtain mixture A;

[0029] S2. Heat up to 40°C, measure the amount of 2...

Embodiment 2

[0031] Embodiment 2, cyanide-free silver plating brightener of the present invention and preparation method thereof

[0032] Cyanide-free silver plating brightener of the present invention, with deionized water as solvent, comprises the component of following concentration: sodium dodecyl diphenyl sulfonate 15g / L, HEDTA 1.5g / L, potassium dihydrogen phosphate 1.0g / L, β-naphthol polyoxyethylene ether 15g / L, polyethylene glycol 5g / L, urea 15g / L, 1-benzyl-1,2,3,4-tetrahydroisoquinoline 12g / L and 2 -Methyltetrahydrofuran-3-thiol 35g / L.

[0033] The preparation method of cyanide-free silver plating brightener of the present invention comprises the following steps:

[0034] S1. Measure the amount of sodium dodecyl dibenzene sulfonate, β-naphthol polyoxyethylene ether, polyethylene glycol and HEDTA into deionized water, stir until completely dissolved, the stirring speed is 150r / min, the stirring time Be 20min, obtain mixture A;

[0035] S2. Heat up to 40°C, measure the amount of ...

Embodiment 3

[0037] Embodiment 3, cyanide-free silver plating brightener of the present invention and preparation method thereof

[0038] Cyanide-free silver plating brightener of the present invention, with deionized water as solvent, comprises the component of following concentration: sodium dodecyl diphenyl sulfonate 20g / L, HEDTA 2.0g / L, potassium dihydrogen phosphate 1.5g / L L, β-naphthol polyoxyethylene ether 22g / L, polyethylene glycol 8g / L, urea 15g / L, 1-benzyl-1,2,3,4-tetrahydroisoquinoline 13g / L and 2 -Methyltetrahydrofuran-3-thiol 40g / L.

[0039] The preparation method of cyanide-free silver plating brightener of the present invention comprises the following steps:

[0040] S1. Measure the amount of sodium dodecyl dibenzene sulfonate, β-naphthol polyoxyethylene ether, polyethylene glycol and HEDTA into deionized water, stir until completely dissolved, the stirring speed is 170r / min, the stirring time Be 25min, obtain mixture A;

[0041]S2. Warm up to 45°C, measure the amount of ...

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Abstract

The invention relates to the technical field of cyanide-free silver plating, in particular to a cyanide-free silver plating brightening agent and a preparing method thereof. Deionized water is adoptedas a solvent and comprises, by concentration, 10 g / L-25 g / L of sodium dodecyl dibenzenesulfonate, 1 g / L-2.5 g / L of HEDTA, 0.5 g / L-2.0 g / L of a stabilizing agent, 20 g / L-35 g / L of a dispersing agent,10 g / L-20 g / L of urea, 10 g / L-15 g / L of 1-benzyl-1,2,3,4-tetrahydroisoquinoline, and 30 g / L-45 g / L of a sulfur-bearing heterocyclic compound. By means of the cyanide-free silver plating brightening agent, the crystal orientation of a plating layer can be changed, grains are obviously refined, and the obtained plating layer is obvious in wear resistance and brightened effect and is not likely affected by current density.

Description

technical field [0001] The invention relates to the technical field of cyanide-free silver plating, in particular to a brightener for cyanide-free silver plating and a preparation method thereof. Background technique [0002] Because silver is soft, easy to polish, easy to braze, good electrical conductivity, and relatively stable chemical properties, electroplating silver occupies an extremely important position in the electronics industry and instrument manufacturing industry, and it also has good decorative properties in daily life. effect. With the improvement of people's living standards and the rapid development of high-tech information industry, people's demand for silver plating, especially bright silver plating, is increasing day by day. [0003] The practical application system of electroplating silver can be divided into two categories: cyanide silver plating and cyanide-free silver plating. Compared with cyanide silver plating, the development of cyanide-free s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/46
CPCC25D3/46
Inventor 田志斌许荣国詹益腾
Owner GUANGZHOU SANFU NEW MATERIALS TECH
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