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A kind of cyanide-free silver plating brightener and preparation method thereof

A silver light and solvent technology, used in the field of cyanide-free silver plating, can solve the problems of poor coating morphology and unbright appearance, and achieve the effects of better wear resistance, grain refinement, and obvious brightening effect.

Active Publication Date: 2021-04-20
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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  • A kind of cyanide-free silver plating brightener and preparation method thereof
  • A kind of cyanide-free silver plating brightener and preparation method thereof

Examples

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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 brightener and a preparation method thereof, which uses deionized water as a solvent and contains components of the following concentration: sodium dodecyl dibenzene sulfonate 10 ~25g / L, HEDTA 1~2.5g / L, stabilizer 0.5~2.0g / L, dispersant 20~35g / L, urea 10~20g / L, 1-benzyl-1,2,3,4- Tetrahydroisoquinoline 10-15g / L, sulfur-containing heterocyclic compound 30-45g / L. The cyanide-free silver plating brightener of the present invention can change the crystal orientation of the coating, significantly refine the crystal grains, and the obtained coating has obvious wear resistance and brightening effect, and is not easily affected by the magnitude of the 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 Patents(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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