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Photovoltaic backplane adhesive and preparation method thereof

A technology for photovoltaic backsheets and adhesives, applied in adhesives, photovoltaic power generation, adhesive additives, etc., can solve the problems of high humidity in the use environment and cannot fully improve the moisture and heat resistance and hydrolysis resistance of polyurethane adhesives

Active Publication Date: 2013-01-23
CSI SOLAR POWER GROUP CO LTD +1
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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.

Method used

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  • Photovoltaic backplane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Component A includes: hydrolysis-resistant polyester polyol 100g; epoxy resin 10g; carbodiimide 0.2g; ethyl acetate 204g; antioxidant 10100.05g; antioxidant 168 0.15g.

[0059] Component B includes: 12g of hexamethylene diisocyanate trimer (80% concentration).

[0060] After mixing component A according to the formula amount, mix component B and component A evenly. After at least 30 minutes of natural defoaming, the adhesive is evenly coated on the corona by scraper coating process. After the coated PET passes through the drying tunnel, the thickness of the adhesive layer is kept between 10 and 20 μm, and then it is compounded into a photovoltaic backplane on a laminating machine.

Embodiment 2

[0062] Component A includes: hydrolysis-resistant polyester polyol 100g; epoxy resin 10g; ethyl acetate 163g; butyl acetate 20g; methyl isobutyl ketone (MIBK) 21g; antioxidant 1010 0.05g; antioxidant 168 0.15g.

[0063] Component B includes: 12g of hexamethylene diisocyanate trimer (80% concentration).

[0064] After mixing component A according to the formula amount, mix component B and component A evenly. After at least 30 minutes of natural defoaming, the adhesive is evenly coated on the corona by scraper coating process. After the coated PET passes through the drying tunnel, the thickness of the adhesive layer is kept between 10 and 20 μm, and then it is compounded into a photovoltaic backplane on a laminating machine.

[0065] Utilize the sizing agent described in embodiment 1 and 2 to compound PET and PVDF, then composite the PVDF / PET composite film and PE film after compounding, obtain PVDF / PET / PE three-layer composite film (such as figure 1 shown), and then aged at 3...

Embodiment 3

[0067] Component A includes: hydrolysis-resistant polyester polyol 100g; epoxy resin 0.2g; butyl acetate 150g; cyclohexanone 250g; antioxidant 1076 0.04g; triphenyl phosphite 0.01g; UV-326 0.05g, The viscosity of component A is 15mPa·s.

[0068] Component B includes: 10.4 g of isophorone diisocyanate trimer (80% concentration).

[0069]After mixing component A according to the formula amount, mix component B and component A evenly. After at least 30 minutes of natural defoaming, the adhesive is evenly coated on the corona by scraper coating process. After the coated PET passes through the drying tunnel, the thickness of the adhesive layer is kept between 10 and 20 μm, and then it is compounded into a photovoltaic backplane on a laminating machine.

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Abstract

The invention discloses a photovoltaic backplane adhesive which comprises a component A and a component B, wherein the component A contains hydrolysis resistant polyester polyol, and component B comprises an isocyanate curing agent; and the molar ratio of the isocyanate group in the isocyanate curing agent and the hydroxyl in the hydrolysis resistant polyester polyol is (0.9-1.3):1. The photovoltaic backplane adhesive adopts the hydrolysis resistant polyester polyol and the isocyanate curing agent, and the molar ratio of the isocyanate group and the hydroxyl in the hydrolysis resistant polyester polyol is (0.9-1.3):1, so that the hydrolysis resistance, the adhesive property and the weather fastness of the prepared photovoltaic backplane adhesive are improved. The photovoltaic backplane adhesive can be used for interlamination compounding of a film, and is especially suitable for the interlamination compounding of a photovoltaic backplane, thus being suitable for splicing and compounding the photovoltaic backplanes made of polyethylene terephthalate (PET), polyvinylidene fluoride (PDVF), tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride (THV), polyvinyl fluoride (PVF), polyethylene (PE) and other films.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic backplanes, and in particular relates to a photovoltaic backplane adhesive and a preparation method thereof. Background technique [0002] The photovoltaic backplane is a composite film obtained by bonding multiple layers of polymer films with an adhesive. During the aging process of existing photovoltaic backsheets such as damp heat and freezing, defects such as blistering, delamination, and glue overflow are prone to occur between the composite films of the photovoltaic backsheet, which affects the service life of photovoltaic modules. The main reason is that the photovoltaic backsheet adhesive is prone to hydrolysis under hot and humid conditions, and the molecular chain is broken to form carboxyl groups, which further promote hydrolysis. [0003] Most of the existing adhesives for photovoltaic backsheets use carbodiimide to react with carboxyl groups generated in the hydrolysis pro...

Claims

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Application Information

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IPC IPC(8): C08G18/79C08G18/42C09J175/06C09J11/06C09J11/08H01L31/048H01L31/049
CPCY02E10/50
Inventor 蒋超彭丽霞傅冬华
Owner CSI SOLAR POWER GROUP CO LTD
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