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Colloid palladium activator and preparation method thereof

A technology of colloidal palladium and activator, which is applied in the direction of liquid chemical plating, coating, metal material coating technology, etc., and can solve the problems of low activity and stability

Inactive Publication Date: 2021-09-24
惠州金晟新电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a kind of colloidal palladium activator and preparation method thereof for the technical problems such as low activity and stability of existing salt-based colloidal palladium activator

Method used

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  • Colloid palladium activator and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] A kind of colloidal palladium activator, this colloidal palladium activator is calculated by mass concentration or volume concentration, comprises component: the palladium chloride of 1.0g / L, the stannous chloride of 12g / L, the sodium chloride of 75g / L, 0.1g / L sodium stannate and 10mL / L hydrochloric acid, the balance is ultrapure water.

[0025] A method for preparing above-mentioned colloidal palladium activator, it comprises steps:

[0026] S1. Stir and mix 10 mL of concentrated hydrochloric acid and 10 mL of ultrapure water to obtain a mixed solution of concentrated hydrochloric acid and ultrapure water.

[0027] S2. Take 1.0 g of palladium chloride and add it into the mixed solution of concentrated hydrochloric acid and ultrapure water in step S1 to stir and dissolve to obtain mixed solution A.

[0028] S3. Add 2.0 g of stannous chloride to the mixed solution A in step S2 for stirring and dissolving to obtain mixed solution B, and react for 8 minutes.

[0029] S4....

Embodiment 2

[0036] In one of the embodiments, the above-mentioned colloidal palladium activator comprises components: palladium chloride of 1.5g / L, stannous chloride of 26g / L, sodium chloride of 113g / L, stannic acid of 1.4g / L Sodium and 28mL / L hydrochloric acid.

[0037] A method for preparing above-mentioned colloidal palladium activator, it comprises steps:

[0038] S1. Stir and mix 28mL of concentrated hydrochloric acid and 26mL of ultrapure water to obtain a mixed solution of concentrated hydrochloric acid and ultrapure water.

[0039] S2. Take 1.5 g of palladium chloride and add it into the mixed solution of concentrated hydrochloric acid and ultrapure water in step S1 to stir and dissolve to obtain mixed solution A.

[0040] S3. Add 3.0 g of stannous chloride to the mixed solution A in step S2 to stir and dissolve to obtain mixed solution B, and react for 8 minutes.

[0041] S4. Another 530 mL of ultrapure water and 113 g of sodium chloride were stirred and dissolved to obtain a m...

Embodiment 3

[0046] In one of the embodiments, the above-mentioned colloidal palladium activator comprises components: the palladium chloride of 2.0g / L, the stannous chloride of 40g / L, the sodium chloride of 150g / L, the stannic acid of 2.8g / L Sodium and 44mL / L hydrochloric acid.

[0047] A method for preparing above-mentioned colloidal palladium activator, it comprises steps:

[0048] S1. Stir and mix 44mL of concentrated hydrochloric acid and 45mL of ultrapure water to obtain a mixed solution of concentrated hydrochloric acid and ultrapure water.

[0049] S2. Take 2.0 g of palladium chloride and add it into the mixed solution of concentrated hydrochloric acid and ultrapure water in step S1 to stir and dissolve to obtain mixed solution A.

[0050] S3. Add 4.0 g of stannous chloride to the mixed solution A in step S2 to stir and dissolve to obtain mixed solution B, and react for 8 minutes.

[0051] S4. Another 700 mL of ultrapure water and 150 g of sodium chloride were stirred and dissolv...

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Abstract

The invention discloses a colloidal palladium activator and a preparation method thereof. The colloidal palladium activator comprises the following components by mass concentration or volume concentration: 1.0-2.5 g / L of palladium chloride, 12-53 g / L of stannous chloride, 75-185 g / L of sodium chloride, 0.1-4.3 g / L of sodium stannate, 10-61 mL / L of hydrochloric acid, and the balance of ultrapure water. According to the preparation method of the colloidal palladium activator, stannous chloride with the adding amount two times that of palladium chloride is added into a palladium chloride solution, disproportionation reaction is rapidly carried out, then black palladium particles are generated, after disproportionation is completed, production personnel timely add the remaining stannous chloride solution into the mixed solution for full mixing, and the mixed solution is fully stirred and subjected to water bath heat preservation, and at the moment, the colloidal palladium activator can form fine colloidal palladium particles, so that the activity and stability of the colloidal palladium activator are enhanced.

Description

technical field [0001] The invention relates to the technical field of palladium activator preparation, in particular to a colloidal palladium activator and a preparation method thereof. Background technique [0002] Colloidal palladium activation solution is the most widely used catalyst in the electroless copper plating industry, especially in PCB hole metallization. In 1861, British scientist Thomas Grhama proposed the concept of colloids. Colloids are highly dispersed systems. In 1961, colloidal palladium developed by Shiley, a famous American scholar, has been widely used in the current industrial production. The preparation method mainly involves the reaction of palladium chloride and stannous chloride. The particle size of colloidal palladium is between 1 and 100nm. The smaller the particle size of palladium, the higher the catalytic activity of the activation solution and the better the stability. The sensitization-activation two-step method is improved to obta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/30B22F9/24C23C18/38
CPCC23C18/30B22F9/24C23C18/38
Inventor 曾文生
Owner 惠州金晟新电子科技有限公司
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