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Molten tin protective agent

A technology of protective agent and molten liquid, applied in coating, metal material coating process, hot dip plating process, etc., can solve the problems of increasing labor cost and power consumption, poor electrical insulation performance, burning machines, etc., and achieve excellent The effect of electrical insulation performance and reliability of use, reduction of electricity consumption, and reduction of heat loss

Active Publication Date: 2011-10-19
SUZHOU GOTTA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the water-soluble anti-oxidation reducing agent interacts with tin melt, the smoke is large, the smell is very irritating, it is not environmentally friendly, and it contains surfactant components harmful to the human body. It must be stirred and manually kneaded by means of a mixer, which is time-consuming and labor-intensive, increasing labor costs and power consumption
And the biggest disadvantage of this kind of water-soluble anti-oxidation reduction agent is that the electrical insulation performance is not good, and it is easy to cause leakage or even burn the machine if it sticks to the PCBA board.

Method used

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  • Molten tin protective agent
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A tin melt protective agent, based on the total weight of the protective agent, it consists of the following components: tripalmitolein 10%, arachidonic acid 75%, liquid polybutene 5% and high viscosity Dimethicone oil (viscosity 5000cps at 20°C) 10%. Stir the above components in proportion at a temperature of 140-160°C to form a homogeneous liquid, filter and fill for use.

[0029] The physical and chemical performance indicators of the protective agent in this embodiment are shown in Table 1, and the standards on which the performance testing is based are shown in Table 2.

Embodiment 2

[0031] A tin melt protective agent, based on the total weight of the protective agent, it consists of the following components: 10% pentaerythritol tetrapalmitoleate, 65% arachidonic acid, 15% liquid polybutene and high viscosity Simethicone oil (viscosity 20000cps at 20°C) 10%. The preparation method is the same as in Example 1, and will not be repeated here.

[0032] The physical and chemical performance indicators of the protective agent in this embodiment are shown in Table 1, and the standards on which the performance testing is based are shown in Table 2.

Embodiment 3

[0034] A tin melt protective agent, based on the total weight of the protective agent, it consists of the following components: 10% pentaerythritol tetralinoleate, 80% docos-6-enoic acid, 5% liquid polyisobutylene % and high viscosity simethicone oil (20000cps viscosity at 20°C) 5%. The preparation method is the same as in Example 1, and will not be repeated here.

[0035] The physical and chemical performance indicators of the protective agent in this embodiment are shown in Table 1, and the standards on which the performance testing is based are shown in Table 2.

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Abstract

The invention discloses a molten tin protective agent. Based on the total weight of the protective agent, the protective agent comprises the following components: 10 to 40 percent of long-chain fat acid ester having a molecular weight between 300 and 1,000, 5 to 80 percent of long-chain fat acid having a molecular weight between 280 and 1,200, 5 to 25 percent of long-chain fatty hydrocarbon having a molecular weight between 900 and 3,500, and 5 to 30 percent of high-viscosity dimethicone, wherein the viscosity at 20 DEG C of the high-viscosity dimethicone is 2,000 to 50,000cps. The molten tin protective agent is environment-friendly, smokeless, odorless, nontoxic, noncorrosive to equipment and simple and convenient in operation, has long-lasting actual effect and antioxidant and reducing functions, and the surface insulation resistance is higher than 1*10<13>omega. When the molten tin disclosed by the invention is used, the solder and power can be saved, a molten copper ratio can be lowered, the welding quality of electronic products can be improved and the insulativity and use reliability of electronic products and electrical appliances can be guaranteed.

Description

technical field [0001] The invention relates to a protective agent for tin melt, which belongs to the technical field of anti-oxidation protection for metal solder. The protective agent can be used for hot-dip tinning, tin handicrafts, preparation of tin alloy solder, wave soldering process, and the like. Background technique [0002] Tin and tin alloys are relatively active metals, especially in the molten state, they can easily react with oxygen in the air to form a denser oxide film. The oxide film can prevent the tin or tin alloy melt from being further oxidized when the tin or tin alloy melt is in a static state. In most cases, however, the tin or tin alloy melts cannot remain static, which causes them to continue to oxidize. For example, when tinned copper wire is hot-dip, the molten tin will be constantly stirred by the moving copper wire, and the oxide film will be continuously destroyed, so that the molten tin will continue to oxidize, and the oxide film will be at...

Claims

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Application Information

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IPC IPC(8): C23C2/30C23C2/08
Inventor 张强
Owner SUZHOU GOTTA TECH
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