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Polyurethane binder as well as preparation method and application thereof

An adhesive, polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of shrinkage of the back panel, easy yellowing of solvent-free adhesive, brittle adhesive layer, etc.

Active Publication Date: 2021-05-18
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Patents CN1093705004A, CN110343497A, CN105524588A, CN110257000A, CN111309247A use polyether polyol as the main bonding substance, and the polyol and the PET, PE, fluorine film used for the back plate The bonding force is low, and the bonding force is even lower after humid heat aging. The PCT 96h back plate has apparent disadvantages such as edge shrinkage, blistering, and delamination, which cannot meet the use requirements of the back plate; Benzene-containing polyester polyols were developed, and the solvent-free adhesive prepared from the polyols is prone to yellowing after ultraviolet aging
In the patent CN109135588A, a small molecular substance is used as a diluent to add, although the viscosity of the glue can be reduced, but the degree of cross-linking of the cured coating is large, and the glue layer becomes brittle after humid heat aging, and the bond is easy to fail

Method used

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  • Polyurethane binder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Take by weighing 5g methyl methacrylate monomer, 65g ethyl acrylate, 20g-2-hydroxyethyl methacrylate, 10g butyl acrylate, add solvent 50g ethyl acetate solvent, 2g initiator azobisisobutyronitrile, 1g of lauryl mercaptan was reacted at 70°C for 2 hours to obtain a polyacrylate polyol resin solution, and then vacuumed to remove the solvent to obtain a polyacrylate polyol resin with a hydroxyl value of 97mg / gKOH and a molecular weight of 1100.

[0053] Take by weighing the above-mentioned polyacrylate polyol of 80g, the polypropylene glycol N-220 (Jiangsu Zhongshan Chemical Industry Co., Ltd.) that 10g molecular weight is 2000, the polyoxypropylene triol MN-1500 (Japan Mitsui Co., Ltd.) that 10g molecular weight is 1500, After adding the antioxidant tetra-β (3,5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol propionate (the amount added accounts for 0.5% of the total weight of the polyurethane binder), vacuum dehydration at 110°C , the molar ratio of the hydroxyl group in...

Embodiment 2

[0056] Weigh 8g ethyl methacrylate monomer, 70g butyl acrylate, 15g-4-hydroxybutyl methacrylate, 10g methyl acrylate, add solvent 50g ethyl acetate solvent, 1.8g initiator azobisisobutyronitrile , 0.8g lauryl mercaptan, reacted at 70°C for 2h to obtain a polyacrylate polyol resin solution, and then vacuumed out the solvent to obtain a polyacrylate polyol resin with a hydroxyl value of 59mg / gKOH and a molecular weight of 1900.

[0057] Take by weighing the above-mentioned polypropylene ester polyol of 65g, 32g molecular weight is the polyether diol DL-1000 (Shandong Dongda Blue Star Chemical Industry) of 1000, 3g molecular weight is the polyoxypropylene triol Poly-G-30-240 of 700 ( U.S. Arch Chemical Company), after adding antioxidant 3, 5-di-tert-butyl-4-hydroxyphenyl propionate octadecyl alcohol ester (addition accounts for 0.3% of the total weight of the polyurethane binder), after Under vacuum dehydration at 110°C, the molar ratio of the hydroxyl group in the polyol to the ...

Embodiment 3

[0060] Weigh 5g methyl methacrylate, 65g butyl acrylate, 15g-2-hydroxyethyl acrylate, 8g ethyl acrylate, 7g ethyl methacrylate, add solvent 50g ethyl acetate solvent, 2g initiator azobisiso Butyronitrile and 0.8g lauryl mercaptan were reacted at 70°C for 2 hours to obtain a polyacrylate polyol resin solution, and then vacuumed to remove the solvent to obtain a polyacrylate polyol resin with a hydroxyl value of 72mg / gKOH and a molecular weight of 1500.

[0061]Take by weighing the above-mentioned polyacrylate polyol resin of 75g, the polyether glycol PPG600 (Jiangsu Zhongshan Chemical Co., Ltd.) that 20g molecular weight is 600, the polyoxypropylene triol MH-1000 (Japan Mitsui Co., Ltd.) that 5g molecular weight is 1500 ), adding antioxidant N, N-bisβ[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hexamethylenediamine (addition accounts for 0.4% of the total weight of polyurethane binder ), after vacuum dehydration at 110°C, the molar ratio of the hydroxyl group in the polyol...

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Abstract

The invention discloses a polyurethane binder as well as a preparation method and application thereof. The polyurethane binder comprises polyol and diisocyanate, and the polyol comprises polyacrylate polyol, polyether glycol and polyfunctional polyether polyol. The polyurethane binder has the advantages of low viscosity, high peel strength and excellent damp-heat aging resistance, when the polyurethane binder is used in a solar back plate, the appearance defects such as edge shrinkage, blistering, layering and the like of the back plate after PCT for 96h are avoided, and the yellowing of the back plate after ultraviolet aging for 300 kWh / m<2> is less than 2, so that the use requirement of the back plate can be well met, the polyurethane binder does not contain a solvent, the binder does not cause air pollution when in use, has greater economic benefit than a commercially available solvent type binder, and can better meet the current environmental protection policy and the demand of the consumer market on environment-friendly products.

Description

technical field [0001] The invention belongs to the field of production and application of adhesives, and in particular relates to a polyurethane adhesive and its preparation method and application. Background technique [0002] Polyurethane adhesives are widely used for bonding and compounding solar backsheets. However, the polyurethane adhesives used contain a large amount of flammable, explosive, and toxic organic solvents, which will cause air pollution when used. With the enhancement of people's awareness of environmental protection, the pressure and responsibility of protecting the earth's environment are increasing day by day, and the development of green and environmentally friendly solvent-free polyurethane adhesive composite backsheets has attracted more and more attention. [0003] Since the solvent-free polyurethane adhesive does not contain solvents, it has a high viscosity and is not easy to level, so it is difficult to apply during the production process. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/40C08G18/48C08G18/62H01L31/049
CPCC09J175/08C08G18/4063C08G18/6229C08G18/4825C08G18/4829H01L31/049Y02E10/50
Inventor 顾丽争田勇张伊玮景改峰梁宏陆李华锋柳青
Owner 乐凯胶片股份有限公司
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