Water phase hole sealing agent and usage thereof

A pore sealing agent, water phase technology, applied in the direction of metal material coating process, etc., can solve the problems of reducing the economic benefit of enterprises, increasing the production cost of enterprises, and difficulty in waste liquid treatment, and is conducive to popularization and application, reducing enterprise costs, The effect of increasing the effect

Inactive Publication Date: 2014-03-19
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 Nichikuang 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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  • Water phase hole sealing agent and usage thereof
  • Water phase hole sealing agent and usage thereof
  • Water phase hole sealing agent and usage thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of aqueous phase sealing agent: 10g isopropanol, 0.04g triethanolamine, 4g tripropylene glycol methyl ether, 0.03g1-phenyl-5-mercaptotetrazolium, 0.1g2-mercaptobenzothiazole, 0.1g polyethylene Pyrrolidone, 2g of fatty acid methyl ester and ethylene oxide condensate were mixed and then added with aqueous solution to prepare 100ml of water-phase sealant (total mass about 100g), and a pH regulator was added to adjust the pH to 10.5.

[0032] How to use the water-phase sealing agent: Activate the plated parts with 0.5mol / L nitric acid for 15 seconds, then immerse the above-mentioned water-phase sealing agent in the 0.7kw ultrasonic environment for 2 minutes, and the temperature of the water-phase sealing agent is kept at 40°C , Wash and dry after sealing. The rigid printed circuit black oil board treated with the water-phase sealing agent can withstand 96 hours of neutral salt spray without corrosion.

Embodiment 2

[0050] Preparation of aqueous phase sealing agent: 20g ethanol, 0.05g diethanolamine, 1.5g propylene glycol methyl ether, 0.19g1-phenyl-5-mercaptotetrazolium, 0.06g2-mercaptobenzothiazole, 0.25g polyvinylpyrrolidone, 1.6g of rhamnolipids were mixed and then added with aqueous solution to prepare 100ml of aqueous phase sealing agent (total mass about 100g), and a pH regulator was added to adjust the pH to 8.

[0051] How to use the water-phase sealing agent: Activate the plated parts with 0.4mol / L sulfuric acid for 10 seconds, then immerse in the above-mentioned water-phase sealing agent for 3 minutes, keep the temperature of the water-phase sealing agent at 45°C, wash and dry the surface after sealing Dry. The rigid printed circuit black oil board treated with this water-phase sealing agent can withstand 98 hours of neutral salt spray without corrosion.

Embodiment 3

[0053] Preparation of water phase sealing agent: 15g isopropanol, 0.02g triethanolamine, 3g tripropylene glycol methyl ether, 0.3g1-phenyl-5-mercaptotetrazolium, 0.01g2-mercaptobenzothiazole, 0.4g polyethylene Pyrrolidone and 0.1 g of sodium dodecylsulfonate were mixed, and then an aqueous solution was added to prepare 100 ml of aqueous phase sealing agent (total mass of about 100 g), and a pH regulator was added to adjust the pH to 4.5.

[0054] The method of using the water-phase sealing agent: activate the plated parts with 0.1mol / L hydrochloric acid, then immerse the above-mentioned water-phase sealing agent in a 0.4kw ultrasonic environment for 2 minutes. Then wash and dry. The flexible 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 anticorrosion of circuit boards, in particular to an aqueous phase sealing agent for sealing holes of nickel-gold plating of circuit boards and a method for using the same. Background technique [0002] Circuit boards often use electroplating or chemical plating processes to increase their corrosion resistance, but there are pores of different sizes on the surface of the coatings generated by any process. These pores are very easy to introduce corrosive media to cause corrosion of the base metal and reduce its corrosion resistance. The application of water-phase sealing agent after electroplating can form a passivation film with stable structure on the surface of the coating and the pores, or react with the coating metal to form a stable complex, reduce the porosity, and thus increase the corrosion resistance of the electroplating product. [0003] The development of water-phase sealing agent has gone through roug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05C25D5/48
Inventor 鲁吉志李易汪传林郭瑞明陈大平
Owner 深圳市华大电路科技有限公司
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