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Water-based silver protective agent and preparation method thereof

A protective agent, water-based technology, applied in the direction of metal material coating process, etc., can solve the problems of easily damaged protective layer, low adhesion performance of silver protective agent, etc., and achieve the effect of good stability

Active Publication Date: 2021-05-07
佛山市因信贵金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the working process of electronic connectors, due to the friction between workpieces, tools, and wires, it is easy to damage or peel off the protective layer formed by the silver protective agent
The adhesion performance of the silver protectant in the prior art is not high, which makes this defect particularly prominent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 40g of octadecyl mercaptan, 10g of trimethyl mercapto phosphate, 20g of OP-10 emulsifier, 5g of KH-550 coupling agent, 10g of nano-silica with a particle size of 10nm, and 10g of isopropanol for later use.

[0036] Add the above stearyl mercaptan and trimethyl mercaptophosphate into water, mix and stir at 55°C at a speed of 1000r / min for 1 hour to obtain component A;

[0037] Add KH-550 and nano silica into water, mix and stir at 800r / min for 2 hours at 60°C to obtain component B;

[0038] Add OP-10 and isopropanol to water, mix and stir at 55°C at a speed of 1000r / min for 1 hour to obtain component C;

[0039] Mix components A, B and C and stir for 1 hour to obtain 1L of water-based silver protectant.

Embodiment 2

[0041] Take 60g of octadecyl mercaptan, 4g of trimethyl mercapto phosphate, 60g of polyoxyethylene lauryl ether, 2g of KH-570 coupling agent, 5g of nano-silica with a particle size of 50nm, 15g of glycerin, polymethoxyethylene 2 g of dimethyl ether, 2 g of nano-titanium dioxide, 0.1 g of lithium cobalt oxide and 1.5 g of water-based polythiophene are set aside.

[0042] Add the above octadecyl mercaptan and trimethyl mercaptophosphate into water, mix and stir at 60°C at a speed of 800r / min for 1 hour to obtain component A;

[0043] Add KH-570 and nano silica into water, mix and stir at 900r / min for 2 hours at 58°C to obtain component B;

[0044] Add lauryl alcohol polyoxyethylene ether and glycerin into water, mix and stir at 60°C at a speed of 800r / min for 1 hour to obtain component C;

[0045] Mix components A, B and C, mix polyoxymethylene dimethyl ether, nano-titanium dioxide, lithium cobalt oxide and water-based polythiophene to obtain component D, and then add component...

Embodiment 3

[0047] Take 50 g of octadecyl mercaptan, 6 g of trimethyl mercapto phosphate, 60 g of isomeric tridecyl alcohol polyoxyethylene ether, 3 g of KH-560 coupling agent, 8 g of nano-silica with a particle size of 30 nm, 12g of diacid, 5g of polyoxymethylene dimethyl ether, 1g of nano-titanium dioxide, 0.5g of lithium cobalt oxide and 0.5g of water-based polythiophene are set aside.

[0048] Add the above stearyl mercaptan and trimethyl mercaptophosphate into water, and mix at a speed of 900r / min at 58°C to obtain component A;

[0049] Add KH-560 and nano silicon dioxide into water, mix at 55°C at a speed of 1000r / min to obtain component B;

[0050] Add isomeric tridecyl alcohol polyoxyethylene ether and dimercaptosuccinic acid into water, and mix at 58°C at a speed of 900r / min to obtain component C;

[0051] In the first stage, component B was added dropwise to component A at a constant speed at a stirring speed of 400r / min under the heat preservation state, then kept at 40°C for ...

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Abstract

The invention provides a water-based silver protective agent and a preparation method thereof. A water-based silver protective agent, the water-based silver protective agent per liter includes: octadecyl mercaptan 40-60g, trimethyl mercapto phosphate 4-10g, emulsifier 20-60g, coupling agent 2-60g 5g, silicon dioxide 5-10g, stabilizer 10-15g, and the balance is water. A preparation method of the water-based silver protective agent, comprising the following steps: adding octadecyl mercaptan and trimethyl mercapto phosphate to water and mixing to obtain component A; adding coupling agent and silicon dioxide to water Mix to obtain component B; add emulsifier and stabilizer to water and mix to obtain component C; mix and stir components A, B and C to obtain a water-based silver protective agent. The water-based silver protective agent provided by the application improves the adhesion and wear resistance, thereby improving the corrosion resistance and discoloration resistance of the electronic connector, prolonging the 5% potassium sulfide resistance test time of the electronic connector, and the protection time Greatly improve.

Description

technical field [0001] The invention relates to the field of surface treatment, in particular to a water-based silver protective agent and a preparation method thereof. Background technique [0002] Metal silver has become one of the most widely used precious metals due to its excellent performance and relatively low price. Among all metals, silver has good electrical conductivity, thermal conductivity, brazing, corrosion resistance and stability, so the metal Silver is particularly widely used in communications, electronics, and electrical products. But silver is a precious metal after all, so silver is generally used as a coating to improve the performance of metal substrate parts, but if it is exposed to the working environment for a long time, the silver coating is easily corroded by sulfides and halides, which will cause the surface to change color. , affecting its product performance. [0003] At present, the protection of silver is mainly based on chemical passivati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/05
CPCC23C22/05
Inventor 林晖
Owner 佛山市因信贵金属材料有限公司