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Bi-component solvent-free polyurethane adhesive for solar backboard

A solvent-free polyurethane and solar backsheet technology, which is applied in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problems of insufficient moisture and heat resistance of adhesives, and achieve improved hydrolysis resistance Performance, meeting application performance requirements, good bonding strength and heat and humidity resistance

Active Publication Date: 2022-03-11
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of insufficient moisture and heat resistance of adhesives used in solvent-free solar battery backplanes, and to provide a two-component solvent-free polyurethane adhesive for solar backplanes

Method used

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  • Bi-component solvent-free polyurethane adhesive for solar backboard
  • Bi-component solvent-free polyurethane adhesive for solar backboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Preparation of component A-1: ​​150g of poly-2-methyl-1,3-propylene glycol phthalate (molecular weight 1000), poly-2-methyl-1,3-propylene isophthalate Add 150g (molecular weight 1000), polypropylene glycol 510g (molecular weight 1500) into a 3L reactor, heat to 70-80°C to melt the raw materials, start stirring to 120rpm to mix the raw materials evenly, add 697g of isophorone diisocyanate, and react The temperature of the kettle was raised slowly to 90°C, and after constant temperature reaction for 1 hour, 0.75 g of dibutyltin dilaurate was added as a catalyst, and then the reaction temperature was maintained at 95°C for 1 hour to obtain component A-1. A-1 has a viscosity of 7000 mPa·s at 25°C and an isocyanate group content of 9.23%.

Embodiment 2

[0029] Preparation of component A-2: 150g of polyphthalate-3-methyl-1,5-pentanediol ester (molecular weight 1000), polyisophthalate-3-methyl-1,5- Add 150g of pentylene glycol ester (molecular weight 1000), 510g of polypropylene glycol (molecular weight 1500) into a 3L reaction kettle, heat to 70-80°C to melt the raw materials, start stirring to 120rpm to mix the raw materials evenly, add isophorone diisocyanate 697g, the temperature of the reactor was slowly raised to 90°C, and after constant temperature reaction for 1h, 0.75g of dibutyltin dilaurate was added as a catalyst, and then the reaction temperature was maintained at 95°C for 1h to obtain A component A-2. A-2 has a viscosity of 55000 mPa·s at 25°C and an isocyanate group content of 9.07%.

Embodiment 3

[0031] Preparation of A component A-3: 150g of polyneopentyl glycol phthalate (molecular weight 1000), 150g of polyneopentyl isophthalate (molecular weight 1000), and 510g of polypropylene glycol (molecular weight 1500) were added Put it into a 3L reaction kettle, heat it to 70-80°C to melt the raw materials, start stirring to 120rpm to mix the raw materials evenly, add 697g of isophorone diisocyanate, slowly raise the temperature of the reaction kettle to 85°C, and add catalyst two after constant temperature reaction for 1 hour. 0.75 g of dibutyltin laurate, and then maintain the reaction temperature at 90° C. for 1 h to obtain A component A-3. A-3 has a viscosity of 75000 mPa·s at 25°C and an isocyanate group content of 9.15%.

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Abstract

The invention relates to an adhesive suitable for solar cell backboards PO / PET (Polyethylene Terephthalate) and PVDF (Polyvinylidene Fluoride) / PET (Polyethylene Terephthalate), in particular to a two-component solvent-free polyurethane adhesive for solar backboards. The bi-component solvent-free polyurethane adhesive for the solar back panel is composed of a component A and a component B. The component A is an isocyanate-terminated polyurethane prepolymer generated through a reaction of polyol and isocyanate, and the component B is composed of a polyol mixture and an auxiliary agent. Wherein the ratio of the amount of substance of the isocyanate group in the component A to the amount of substance of the hydroxyl group in the component B is (1.2-1.8): 1. According to the solar cell backboard prepared by using the adhesive disclosed by the invention, after the normal state, PCT aging for 48 hours and double-85 aging for 2000 hours, the PO / PET layer and the PVDF / PET layer have relatively high peel strength and almost have no yellowing, so that the application performance requirements of the adhesive for the solar cell backboard can be completely met.

Description

technical field [0001] The invention relates to an adhesive suitable for PO / PET and PVDF / PET of a solar cell backboard, in particular to a two-component solvent-free polyurethane adhesive for a solar backboard. Background technique [0002] Due to the gradual reduction of fossil energy and various pollution problems during its use, countries are strengthening the development and utilization of clean energy such as solar energy. Solar panels are commonly used in solar equipment at present, which is an important device for converting solar energy into electrical energy. The service life of such products is generally designed to be more than 25 years. To ensure such a long service life of the product, it is necessary to strictly control the quality of each component, and the role of the solar battery backsheet in these components cannot be underestimated. At present, there are different materials for the back sheet of solar cell module packaging, the most commonly used is poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/06H01L31/049
CPCC09J175/04C09J11/06H01L31/049C08K5/29C08K5/5435Y02E10/50
Inventor 鲍建楠付洪娥王新冯斯旸魏田李致轩胡曦华
Owner SHENYANG RES INST OF CHEM IND
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