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A weather-resistant two-component polyurethane adhesive and solar cell back sheet

A two-component polyurethane and adhesive technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive type, adhesive, etc., can solve the problem of poor resistance to moisture and heat hydrolysis, insufficient heat resistance, poor initial adhesion, etc. problems, achieve the effects of reducing the risk of delamination, excellent substrate adaptability, and excellent aging peel strength

Active Publication Date: 2021-06-18
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a weather-resistant two-component polyurethane adhesive to solve the defects of poor initial adhesion, insufficient heat resistance, and poor moisture and thermal hydrolysis resistance of existing adhesives for solar back panels

Method used

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  • A weather-resistant two-component polyurethane adhesive and solar cell back sheet
  • A weather-resistant two-component polyurethane adhesive and solar cell back sheet
  • A weather-resistant two-component polyurethane adhesive and solar cell back sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0055] The adhesive formulations used in Examples 1-6 were prepared according to the parts by weight shown in Table 4, and tested using the sample performance evaluation method. Wherein, curing agent C in Table 4 is a hexamethylene diisocyanate trimer curing agent N3300 (trade name) manufactured by Bayer, with an NCO content of 21.8 wt% and a solid content of 100%.

[0056] Sample performance evaluation method:

[0057] 1. Preparation of test samples

[0058] The substrates used are polyethylene terephthalate film (PET) of 125 μm and PVDF film of 22.5 μm after corona treatment, and the prepared adhesive solution is coated on the PET film, and the glue amount is 20- 25g / m 2 , dried at 80°C for 2 minutes, fully bonded the PVDF film and the PET film to obtain a composite sample.

[0059] 2. Initial peel strength test

[0060] The peel strength test is carried out by sampling immediately after the composite sample is prepared, referring to the national standard GB / T 2790-1995 ...

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Abstract

The invention discloses a weather-resistant two-component polyurethane adhesive. The main agent of the adhesive is composed of hydroxyl-terminated polyurethane prepolymer A and polyacrylate polyol B. The hydroxyl-terminated polyurethane prepolymer A It is obtained by polymerizing polyester polyol and difunctional isocyanate, and the curing agent is polyfunctional isocyanate compound. The proportion of hydroxyl-terminated polyurethane prepolymer A in the main agent is 50-70 parts by weight, the proportion of polyacrylate polyol B is 30-50 parts by weight, and the hydroxyl group in the main agent and the isocyanate in the curing agent The equivalent ratio NCO / OH of the base is 0.5-2.0. Using the adhesive of the invention can realize high cohesiveness between base film layers, and can still maintain good cohesive strength after high-temperature and high-humidity aging test.

Description

technical field [0001] The invention relates to a weather-resistant two-component polyurethane adhesive that can still have excellent bonding effect after being exposed and aged under long-term humid heat conditions. The technology can be applied to solar battery back panels or other outdoor industrial fields. Background technique [0002] Solar energy is the cleanest, safest and most reliable energy source in the future. Photovoltaic industry is increasingly becoming another explosive development industry after IT and microelectronics industry in the world. Solar cells can be used outdoors for at least 25 years. Therefore, multilayer films that can be used for solar cell backsheets need to have sufficient weather resistance. The adhesives used for lamination between the various structural layers must have comprehensive performance advantages such as good construction, high bond strength, high heat resistance, UV aging resistance, and long-term resistance to moisture and he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/42C08G18/62H01L31/048H01L31/049
CPCC08G18/4277C08G18/6225C09J175/06H01L31/0481H01L31/049Y02E10/50
Inventor 李永杰田丛黄建滔刘瀛姜伟赵伟建陈月霞
Owner CHINA LUCKY FILM CORP
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