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Polyurethane binder and application thereof

An adhesive, polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of insufficient moisture and heat resistance, poor adhesion, etc., to improve the moisture and heat resistance, cohesion and Heat resistance improvement, effect of improving heat resistance and hydrolysis resistance under moist heat

Pending Publication Date: 2022-04-15
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a kind of polyurethane adhesive and application thereof, and this polyurethane adhesive can solve the bonding problem of the back sheet and EVA thermocompression after existing solar battery back sheet is made with adhesive. Defects of poor performance and insufficient heat and humidity resistance

Method used

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  • Polyurethane binder and application thereof
  • Polyurethane binder and application thereof
  • Polyurethane binder and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of the hydroxyl component:

[0031] Equipped with mechanical stirring, thermometer, reflux condenser, N 2 In the reaction kettle of the environment, add 100 parts by mass of ethyl acetate, heat to 75 ° C, 19 parts by mass of n-butyl acrylate, 32 parts by mass of methyl methacrylate, 23 parts by mass of cyclohexyl methacrylate, 6 parts by mass of 2-hydroxyethyl methacrylate, 20 parts by mass of isooctyl acrylate and 0.6 parts by mass of azobisisobutyronitrile are uniformly mixed and added dropwise to the reaction system within 2 hours, and then cooled to room temperature after 3 hours of heat preservation , to obtain the hydroxyl-containing methacrylate polymer A1 solution, the content of the hydroxyl-containing methacrylate polymer is 50wt%, and the relevant physical parameters of the hydroxyl-containing methacrylate polymer A1 are shown in Table 1.

[0032] Preparation of curing agent:

[0033] Equipped with mechanical stirring, thermometer, reflux conden...

Embodiment 2

[0037] Preparation of the hydroxyl component:

[0038] Equipped with mechanical stirring, thermometer, reflux condenser, N 2In the reaction kettle of the environment, add 100 mass parts of ethyl acetate by mass parts, heat to 75 ° C, 32 mass parts of n-butyl acrylate, 26.5 mass parts of methyl methacrylate, 20 mass parts of cyclohexyl methacrylate, 6.5 parts by mass of 2-hydroxyethyl methacrylate, 15 parts by mass of isooctyl acrylate and 0.3 parts by mass of azobisisobutyronitrile were uniformly mixed and added dropwise to the reaction system within 2 hours, and kept warm for 3 hours and then lowered to room temperature , to obtain the hydroxyl-containing methacrylate polymer A4 solution, the content of the hydroxyl-containing methacrylate polymer A4 is 50 wt%, and the relevant physical parameters of the hydroxyl-containing methacrylate polymer A4 are shown in Table 1 .

[0039] The preparation of curing agent is with embodiment 1

[0040] Preparation of polyurethane binde...

Embodiment 3

[0043] Preparation of the hydroxyl component:

[0044] Equipped with mechanical stirring, thermometer, reflux condenser, N 2 In the reaction kettle of the environment, add 100 parts by mass of ethyl acetate, heat to 75 ° C, and add 58 parts by mass of n-butyl acrylate, 32.8 parts by mass of cyclohexyl methacrylate, 9.2 parts by mass of methacrylic acid-2-hydroxy Ethyl ester and 0.4 parts by mass of azobisisobutyronitrile were mixed evenly and then continuously added dropwise to the reaction system within 2 hours, kept warm for 3 hours and then lowered to room temperature to obtain a hydroxyl-containing methacrylate polymer A3 solution, containing hydroxyl The content of the methacrylate polymer A3 is 50wt%, and the relevant physical parameters of the hydroxyl-containing methacrylate polymer A3 are shown in Table 1.

[0045] Preparation of curing agent:

[0046] Equipped with mechanical stirring, thermometer, reflux condenser, N 2 In the reaction kettle of the environment, a...

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Abstract

The invention discloses a polyurethane binder and application thereof.The polyurethane binder comprises a main agent and a curing agent, the main agent comprises a hydroxyl component and a chain extender, the hydroxyl component comprises a hydroxyl-containing acrylate polymer and / or a hydroxyl-containing methacrylate polymer, the chain extender comprises a chain extender, and the chain extender comprises a chain extender; the curing agent comprises an acrylate polymer containing an isocyanate group and / or a methacrylate polymer containing an isocyanate group. The polyurethane adhesive can meet the use requirements that a back plate and an EVA (Ethylene Vinyl Acetate) film in a solar cell back plate have excellent thermocompression bonding strength after being subjected to thermocompression bonding, and the back plate / EVA film can still keep high-strength bonding after being subjected to damp-heat aging resistance.

Description

technical field [0001] The invention belongs to the field of adhesive production and application, and in particular relates to a polyurethane adhesive and its application. Background technique [0002] The solar battery is used outdoors for at least 25 years. Usually, the structure of solar cell module with backsheet is glass / EVA / wafer / EVA / backsheet. In order to ensure the service life of the battery pack, it is usually required that the adhesive and film used to make the solar cell back sheet have sufficient weather resistance. In order to ensure that the back sheet can effectively protect the battery during actual use, it is also required The backsheet and EVA film have excellent thermocompression bonding strength after thermocompression bonding, and the backsheet / EVA can still maintain high-strength bonding after heat and humidity resistance aging. However, the existing backsheets made of adhesives for solar battery backsheets generally have the defects of poor adhesion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C08G18/62H01L31/049
CPCY02E10/50
Inventor 李永杰许士鲁王玲玲张占国高磊张希堂
Owner CHINA LUCKY FILM CORP
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