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Adhesive composition for solar cell backplane and preparation method thereof

A technology of solar cells and adhesives, applied in the directions of adhesives, adhesive additives, adhesive types, etc., can solve the problem of insufficient aging resistance, high humidity in the use environment, and can not fully improve the heat resistance of polyurethane adhesives. performance and hydrolysis resistance, to achieve the effect of good wetting and lower surface tension

Inactive Publication Date: 2016-12-21
SHANGHAI WEIKAI CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrolysis of existing polyurethane adhesives is generally caused by the high humidity of the environment in which they are used, and the purpose of improving the moisture and heat resistance and hydrolysis resistance of polyurethane adhesives cannot be fully achieved only by controlling the water content.
[0006] CN 104017531A discloses a new type of polyester polyol, which can be reacted with an isocyanate curing agent to obtain a hydrolysis-resistant polyurethane adhesive. On the premise of retaining good mechanical properties, it improves the polyurethane adhesive produced by using traditional polyester polyol. The hydrolysis resistance of the adhesive. At the same time, a certain proportion of light stabilizer is added to the adhesive, which improves the hydrolysis resistance and aging resistance of the polyurethane adhesive used in the photovoltaic backplane to a certain extent, but the overall aging resistance The performance is still not up to the current double "85" (that is, the aging test under the condition of 85°C and 85% humidity).

Method used

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  • Adhesive composition for solar cell backplane and preparation method thereof
  • Adhesive composition for solar cell backplane and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0030] This embodiment relates to an adhesive for solar battery backsheets: it is composed of a prepolymer component and a B component, wherein the prepolymer component consists of 10wt% of fluorine-modified polyester resin and 15wt% of hydroxyl polyester. Resin, 0.5wt% antioxidant 1010, 1wt% antioxidant 168, 1.5wt% ultraviolet absorber 234, 2wt% polycarbodiimide P200 hydrolysis stabilizer, 70wt% ethyl acetate diluent mixed uniformly The curing component is hexamethylene diisocyanate trimer; after the prepolymer component and the curing component are mixed uniformly at a weight ratio of 15:1, they are uniformly coated on the bonded material through an automated continuous molding process PET film surface, sizing amount is 10g / m 2 After the solvent evaporates and dries, attach a 25μm thick PVDF film and place it in an oven in the order of 250μmPET / adhesive / 25μmPVDF film. The curing temperature is 120℃, the curing time is 3min, and it is cured in a 40℃ oven for 3 days. .

Embodiment 2

[0032] This embodiment relates to an adhesive for solar cell back sheets: it is composed of a prepolymer component and a B component, wherein the prepolymer component consists of 2wt% fluorine-modified polyurethane resin and 25wt% hydroxy polyester resin , 0.1wt% antioxidant 1076, 0.4wt% antioxidant 168, 0.5wt% UV-531, 2wt% polycarbodiimide P100 hydrolysis stabilizer, 70wt% ethyl acetate diluent mixed uniformly , The curing component is hexamethylene diisocyanate trimer; after the prepolymer component and the curing component are mixed uniformly at a weight ratio of 18:1, they are uniformly coated on the bonded material PET through an automated continuous molding process Film surface, sizing amount is 10g / m 2 After the solvent evaporates and dries, attach a 25μm thick PVDF film and place it in an oven in the order of 250μmPET / adhesive / 25μmPVDF film. The curing temperature is 120℃, the curing time is 3min, and it is cured in a 40℃ oven for 3 days. .

Embodiment 3

[0034] This embodiment relates to an adhesive for solar battery backsheets: it is composed of a prepolymer component and a B component, wherein the prepolymer component is 15wt% fluorine-modified polyethylene resin and 10wt% hydroxy polyester Resin, 1wt% antioxidant 1076, 2wt% UV-326, 2wt% monomeric carbodiimide hydrolysis stabilizer, 70wt% ethyl acetate diluent are mixed uniformly, and the curing component is hexamethylene two Isocyanate trimer: After mixing the prepolymer component and the curing component uniformly in a weight ratio of 16:1, it is evenly coated on the surface of the PET film of the bonded material through an automated continuous molding process, with a sizing amount of 10g / m 2 After the solvent evaporates and dries, attach a 25μm thick PVDF film and place it in an oven in the order of 250μmPET / adhesive / 25μm PVDF film. The curing temperature is 120℃, the curing time is 3min, and it is cured in a 40℃ oven. day.

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Abstract

The invention provides an adhesive composition for a solar cell backplane and a preparation method thereof. The adhesive composition is composed of a prepolymer component and a curable component, wherein the prepolymer component contains the following raw materials: fluorine-modified resin, polyester resin, an antioxidant, an ultraviolet absorber, an anti-hydrolysis agent and ethyl acetate; and the curable component is a hexamethylene diisocyanate trimer. The preparation method of the adhesive composition comprises the step of respectively preparing the prepolymer component and the curable component. A preparation method of the prepolymer component comprises the step of uniformly mixing the above raw materials. When in use, the prepolymer component and the curable component are mixed according to the weight ratio of (15-18): 1. The invention has the following advantages: contact area is increased to raise the whole peel strength of the backplane; by adding fluororesin into the adhesive, aging resistance of the backplane can be further enhanced, and dual ''85'' test lasts over 3,000 hours.

Description

Technical field [0001] The invention relates to an adhesive composition for solar battery back sheets and a preparation method thereof, and belongs to the technical field of adhesives for solar battery back sheets. Background technique [0002] In recent years, with the improvement of global mechanization and modernization, the demand for energy continues to increase. As an important part of renewable energy, the photovoltaic industry will become the main method to solve the global energy crisis. [0003] The special use environment of photovoltaic products puts forward higher requirements for its corresponding components, such as aging resistance, high and low temperature resistance, hydrolysis resistance, and breakdown resistance. Among them, the backsheet is one of the most important packaging materials in the production process of photovoltaic modules. The characteristics of the backplane directly determine the appearance and service life of the photovoltaic module. [0004] T...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J123/06C09J167/00C09J175/04C09J133/04C09J11/06C09J11/08
CPCC09J175/06C08L2203/204C08L2205/02C08L2205/03C09J11/06C09J11/08C09J123/06C08L67/00C09J175/04C08L33/04
Inventor 虞明东李桐蒋天龙
Owner SHANGHAI WEIKAI CHEM
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