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A kind of aqueous phase sealing agent and using method thereof

A technology of sealing agent and water phase, applied in the direction of metal material coating process, etc., can solve the problems of reducing economic benefits of enterprises, increasing production costs of enterprises, and difficulty in waste liquid treatment, so as to facilitate popularization and application, reduce enterprise costs, Effect of effect improvement

Inactive Publication Date: 2016-02-17
深圳市华大电路科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For a long period of time in the past, water-phase sealing agents have long relied on imports from Europe, America and Japan, which are expensive and inconvenient
At present, the existing water-phase sealing agents in China still have disadvantages such as high price, difficult waste liquid treatment, and unfavorable environmental protection. Therefore, the research work of environment-friendly and high-efficiency water-phase sealing agents has become a research hotspot in this field.
[0005] Some existing sealing agents (such as Nippon Mining GT-20 series water-phase sealing agent) have excellent effects, but they are expensive (>300 yuan / L), which increases the production cost of the enterprise and reduces the economic benefits of the enterprise

Method used

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  • A kind of aqueous phase sealing agent and using method thereof
  • A kind of aqueous phase sealing agent and using method thereof
  • A kind of aqueous phase sealing agent and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of water phase sealing agent: 10g isopropanol, 0.04g triethanolamine, 4g tripropylene glycol methyl ether, 0.03g 1-phenyl-5-mercaptotetrazolium, 0.1g 2-mercaptobenzothiazole, 0.1g polyethylene After mixing pyrrolidone, 2 g of fatty acid methyl ester and ethylene oxide condensate, an aqueous solution is added to prepare 100 ml of an aqueous phase sealing agent (total mass is about 100 g), and a pH regulator is added to adjust the pH to 10.5.

[0027] How to use the water-phase sealing agent: After activating the plated parts with 0.5mol / L nitric acid for 15 seconds, immerse it in the above-mentioned water-phase sealing agent in a 0.7kw ultrasonic environment for 2 minutes, and the temperature of the water-phase sealing agent is constant at 40℃ , Wash and dry after sealing. The hard printed circuit black oil board treated with the water phase sealing agent can withstand 96 hours of neutral salt spray without corrosion.

Embodiment 2

[0045] Preparation of water phase sealing agent: 20g ethanol, 0.05g diethanolamine, 1.5g propylene glycol methyl ether, 0.19g 1-phenyl-5-mercaptotetrazolium, 0.06g 2-mercaptobenzothiazole, 0.25g polyvinylpyrrolidone, After mixing 1.6 g of rhamnolipids, add an aqueous solution to prepare 100 ml of water phase sealing agent (total mass about 100 g), and add a pH regulator to adjust the pH to 8.

[0046] How to use the water-phase sealing agent: After activating the plated parts with 0.4mol / L sulfuric acid for 10 seconds, immerse it in the above-mentioned water-phase sealing agent for 3 minutes. The temperature of the water-phase sealing agent is constant at 45°C. After sealing, wash and bake with water dry. The hard printed circuit black oil board treated with this water phase sealing agent can withstand 98 hours of neutral salt spray without corrosion.

Embodiment 3

[0048] Preparation of water phase sealing agent: 15g isopropanol, 0.02g triethanolamine, 3g tripropylene glycol methyl ether, 0.3g 1-phenyl-5-mercaptotetrazole, 0.01g 2-mercaptobenzothiazole, 0.4g polyethylene After mixing pyrrolidone and 0.1 g of sodium lauryl sulfonate, an aqueous solution was added to prepare 100 ml of water phase sealing agent (total mass about 100 g), and a pH regulator was added to adjust the pH to 4.5.

[0049] How to use the water-phase sealing agent: After activating the plating piece with 0.1mol / L hydrochloric acid, immerse it in the above-mentioned water-phase sealing agent under 0.4kw ultrasonic environment for 2 minutes. The temperature of the water-phase sealing agent is constant at 37℃, and the sealing After washing and drying. The soft printed circuit butter board treated with this water phase sealing agent can withstand 96 hours of neutral salt spray without corrosion.

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Abstract

The invention relates to a water phase hole sealing agent and usage thereof. With the total weight as the benchmark, the water phase hole sealing agent comprises the following components by weight percent: 10-20% of alcohols, 0.02-0.05% of alcohol amine, 1.5-5% of ethers, 0.03-0.3% of 1-phenyl-5-tetrazole-thione, 0.01-0.1% of 2- mercaptobenzothiazole, 0.1-0.4% of polyvinylpyrrolidone, 0.1-2% of surfactant, and the balance of water. The alcohol amine, 1-phenyl-5-tetrazole-thione and 2- mercaptobenzothiazole are mixed for preparing the water phase hole sealing agent, due to the assist of water solution of alcohols, ethers, polyvinylpyrrolidone, surfactant, and pH modifier, the alcohol amine, 1-phenyl-5-tetrazole-thione and 2-mercaptobenzothiazole cooperate so as to realize unexpected hole sealing effect; according to the experimental data, the plated piece with holes sealed is not corroded after at least 96 hours of salt spray test, so that the water phase hole sealing agent is obviously improved in hole sealing effect compared with the existing hole sealing agent, and the corrosion resistance of the plated piece is remarkably enhanced.

Description

Technical field [0001] The invention belongs to the field of anti-corrosion of circuit boards, and particularly relates to a water-phase sealing agent for the sealing treatment of nickel-gold plating layers of circuit boards and a use method thereof. Background technique [0002] Circuit boards often use electroplating or electroless plating processes to increase their corrosion resistance, but there are pores of different sizes on the surface of the plating layer generated by any process. These pores can easily introduce corrosive media to cause corrosion of the base metal and reduce its corrosion resistance. After electroplating, the application of water phase sealing agent can form a stable passive film on the surface and pores of the coating or react with the metal of the coating to form a stable complex, reduce porosity, and increase the corrosion resistance of electroplated products. [0003] The development of water phase sealing agent has gone through roughly three stages:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/05C25D5/48
Inventor 文桥张俊珩孙建光郭瑞明
Owner 深圳市华大电路科技有限公司
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