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Surface protective agent for photovoltaic solder strip and preparing method of surface protective agent

A surface protectant and photovoltaic welding tape technology, applied in the field of metal coating protection, can solve the problems of flux residue, accelerated film corrosion, coating oxidation corrosion, etc., to prevent oxidative discoloration, improve shelf life, strong corrosion resistance and peel strength Effect

Inactive Publication Date: 2018-03-23
XIAN TELISON NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used passivation film protectors can form a dense and highly adhesive protective film on the surface of the coating, but the film layer of this type of protective film is relatively thin, and when the amount of chromium used is not enough, it will accelerate the corrosion of the film layer, and the interconnection Flux is required in the manufacturing process of the confluence strip, and there will be flux residues on the surface of the coating, and the residual flux will cause certain oxidation and corrosion to the coating in a humid environment
In addition, interconnection bars and busbars are to be soldered on the surface of the battery, and the generation of passivation layer will inhibit the activity of flux, which will lead to the problem of difficult soldering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A surface protective agent for photovoltaic welding ribbons, comprising the following raw materials: phytic acid 3%, trisodium phosphate 1%, oleic acid 0.5%, 2-mercaptobenzoxazole 1.6%, thiourea 2%, benzotri 1% azole, 0.5% dodecyl primary amine, 0.5% acrylamide, 0.05% phenethylphenol polyoxyethylene ether, and the balance is deionized water.

[0025] The preparation method of the above-mentioned surface protective agent for photovoltaic welding strips comprises the following steps:

[0026] Step 1, phytic acid, trisodium phosphate, oleic acid, 2-mercaptobenzoxazole, thiourea, benzotriazole, dodecyl primary amine, acrylamide, phenylethylphenol polyoxyethylene The ether was dissolved in absolute ethanol, and deionized water was added and stirred at 25°C for 3 minutes to obtain a raw material stirring liquid, wherein absolute ethanol accounted for 10% of the raw material stirring liquid;

[0027] Step 2, using ultrasonic waves with a frequency of 55KHz to disperse the raw...

Embodiment 2

[0029] A surface protective agent for photovoltaic ribbon, comprising the following raw materials: 4% of hydroxyethylene diphosphoric acid, 1% of malic acid, 0.5% of tartaric acid, 3.5% of thiourea, 0.5% of benzotriazole, N,N-di 1.5% methylamide, 0.02% phenethylphenol polyoxyethylene ether, and the balance is deionized water.

[0030] The preparation method of the above-mentioned surface protective agent for photovoltaic welding strips comprises the following steps:

[0031] Step 1, add hydroxyethylene diphosphoric acid, malic acid, tartaric acid, thiourea, benzotriazole, N,N-dimethylamide, phenethylphenol polyoxyethylene ether to dissolve in absolute ethanol, add Deionized water was stirred at 35° C. for 2.5 minutes to obtain a raw material stirring liquid, wherein absolute ethanol accounted for 10% of the raw material stirring liquid;

[0032] Step 2, using ultrasonic waves with a frequency of 50KHz to disperse the raw material stirring solution for 2 minutes to obtain a su...

Embodiment 3

[0034] A surface protective agent for photovoltaic ribbons, comprising the following raw materials: phytic acid 1%, trisodium phosphate 3%, hydroxyethylene diphosphoric acid 2%, malic acid 1%, oleic acid 0.5%, thiourea 3.5% , sodium diethylamino dithioformate 0.5%, benzotriazole 2%, N,N-dimethylamide 2%, OP-10 0.02%, phenylethyl biphenol polyoxyethylene ether 0.05%, the rest The volume is deionized water.

[0035] The preparation method of the above-mentioned surface protective agent for photovoltaic welding strips comprises the following steps:

[0036] Step 1, add phytic acid, trisodium phosphate, hydroxyethylene diphosphate, malic acid, oleic acid, thiourea, sodium diethylaminodithioformate, benzotriazole, N,N-dimethyl Add amide, OP-10, and phenylethyl biphenol polyoxyethylene ether to dissolve in absolute ethanol, add deionized water and stir at 45°C for 2 minutes to obtain a raw material stirring liquid, wherein absolute ethanol accounts for 10% of the raw material stirr...

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PUM

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Abstract

The invention discloses a surface protective agent for a photovoltaic solder strip. The surface protective agent comprises the following raw materials including phosphate group compounds, carboxy group compounds, organic sulfur compounds, organic N type compounds, amide compounds, an emulgator and deionized water. The surface protective agent for the photovoltaic solder strip does not contain chromium, environment pollution is avoided in the using process, and the surface protective agent is economical and environment-friendly. According to the surface protective agent for the photovoltaic solder strip, a layer of protection film is formed on the surface of a clad layer under the non-passivation action, oxidization discoloration of the clad layer can be effectively prevented, and high corrosion resistance and peeling intensity are achieved. The shelf life of products is prolonged, and the product stability is improved. The preparing method is simple and easy to operate and implement.

Description

technical field [0001] The invention relates to the field of metal coating protection, in particular to a surface protectant for photovoltaic welding strips and a preparation method thereof. Background technique [0002] Tin plating is widely used in electronics, photovoltaics, surface treatment, etc. due to its excellent performance. Due to the current vigorous development of clean energy, photovoltaic energy, as an important clean energy, has also developed rapidly in recent years. In the manufacturing process of photovoltaic panels, busbars and interconnection strips are used to weld and interconnect the cells. Interconnection strips and busbars It is a kind of welding material with tin-plated surface. The welding material with tin alloy coating on the surface will produce oxidative discoloration and blackening due to the inclusion of various impurities, which will cause corrosion to the tin alloy coating. [0003] The commonly used coating protectant contains chromium, ...

Claims

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Application Information

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IPC IPC(8): C23F11/10C23F11/18
CPCC23F11/10C23F11/188
Inventor 李少萌张辉杨群陈庆谊年有权
Owner XIAN TELISON NEW MATERIAL
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