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Water-based adhesive for compounding solar cell backboard and compounding method of water-based adhesive

A technology of water-based adhesives and solar cells, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve problems such as poor weather resistance, reduced bonding strength, and non-compliance with environmental protection requirements, achieving excellent bonding performance, Good anti-heat effect

Inactive Publication Date: 2021-06-29
常州勤邦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the solar backplane requires long-term outdoor use (the general design requires a service life of 25 years), the adhesive will be hydrolyzed and the bonding strength will decrease over time, thus shortening the service life of the solar backplane
[0004] At present, the adhesives of composite backsheets used in the market are mainly solvent-based polyurethane adhesives, which have poor weather resistance. Because they contain solvents, their use, storage and transportation have high safety risks and do not meet environmental protection requirements.
However, water-based adhesives either cost too much, have a low dry rate and are not suitable for mass production, or are easily hydrolyzed under high temperature and high humidity to reduce the bonding strength.

Method used

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  • Water-based adhesive for compounding solar cell backboard and compounding method of water-based adhesive
  • Water-based adhesive for compounding solar cell backboard and compounding method of water-based adhesive
  • Water-based adhesive for compounding solar cell backboard and compounding method of water-based adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Water-based adhesive for solar backsheet, by weight, including the following raw materials: 75 parts of polyacrylic acid emulsion, 3 parts of aliphatic polyisocyanate curing agent, 1 part of water-based anti-hydrolysis agent, 0.5 part of water-based silane coupling agent, wetting agent 0.1 part, 10 parts of water.

[0025] Polyacrylic acid emulsion polymerization method

[0026] 100 grams of water, 1.5 grams of reactive emulsifier SR-10, and 0.15 grams of sodium bicarbonate are stirred evenly, and are added with a stirrer, a thermometer, a four-necked flask with a reflux condenser and a dropping funnel, and n-butyl acrylate ( BA) 4 grams, isonew acrylate (2-EHA) 6 grams, acrylic acid (AA) 0.3 grams, methyl methacrylate (MMA) 2 grams, styrene 1.2 grams, hydroxypropyl methacrylate 1.5 grams, add In a four-necked flask, stir and heat to 75-80°C, mix 0.3 g of initiator / ammonium persulfate and 6 g of deionized water and drop them into the four-necked flask within 5 minutes,...

Embodiment 2

[0036] Water-based solar backsheet adhesive, by weight, includes the following raw materials: 80 parts of polyacrylic acid emulsion, 4 parts of aliphatic polyisocyanate curing agent, 2 parts of water-based anti-hydrolysis agent, 2 parts of water-based silane coupling agent, 2 parts of wetting agent, 15 parts of water.

[0037] The preparation method of polyacrylic acid emulsion is the same as that of Example 1.

[0038] The preparation method of adhesive is:

[0039] a) Weigh 80 parts of aqueous polyacrylic acid emulsion (solid content 48%) in a clean container;

[0040] b) Start stirring slowly, increase the speed to 3 Hz, add 4 parts of polyisocyanate curing agent during stirring, increase the stirring speed to 5 Hz, and stir for 10 minutes until the curing agent is completely dissolved, and the mixed liquid is milky white.

[0041] c) During stirring, slowly add 2 parts of water-based anti-hydrolysis agent; 2 parts of coupling agent, 2 parts of wetting agent, and 15 parts...

Embodiment 3

[0047] Water-based solar backsheet adhesive, by weight, includes the following raw materials: 85 parts of polyacrylic acid emulsion, 5 parts of aliphatic polyisocyanate curing agent, 3 parts of water-based anti-hydrolysis agent (carbodiimide); 3 parts of water-based silane coupling agent, 3 parts of wetting agent, 20 parts of water.

[0048] The preparation method of polyacrylic acid emulsion is the same as that of Example 1.

[0049] The preparation method of the adhesive is the same as in Example 1.

[0050] Composite process:

[0051]

[0052]

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PUM

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Abstract

The invention belongs to the field of solar backboard film manufacturing, and particularly discloses a water-based adhesive for compounding a solar cell backboard and a compounding method of the water-based adhesive. The water-based adhesive comprises the following components in parts by weight: 75-85 parts of a water-based polyacrylic emulsion, 3-5 parts of a polyisocyanate curing agent, 1-3 parts of a water-based anti-hydrolysis agent, 0.5-3 parts of a coupling agent, 0.1-3 parts of a wetting agent and 10-20 parts of water. The adhesive has the advantages of being safe, environmentally friendly, economical and the like, is excellent in bonding performance, and has better heat resistance, moisture resistance and outdoor aging resistance compared with traditional solvent type polyurethane adhesive. By using the existing production equipment of a composite backboard factory, the water-based composite glue of the backboard can be achieved.

Description

technical field [0001] The invention belongs to the field of solar backplane manufacturing, and in particular relates to a water-based adhesive used for compounding solar battery backplanes and a compounding method thereof. Background technique [0002] The solar backsheet is located on the back of the solar panel components. Its main function is to protect the solar cell components from being irradiated by sunlight, temperature changes, wind and rain and other environmental factors in the outdoor environment to corrode the materials such as cells, and to play insulation and weather resistance. , protection, support and other functions, it is the key packaging material to protect solar modules for long-term use outdoors. [0003] The solar backsheet is usually made of fluorine film (PVF / PVDF), polyester film (PET), polyolefin film and other film materials through adhesive compounding. Since the solar backsheet requires long-term outdoor use (the general design requires a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30C09J133/08C09J11/06C09J7/25C09J7/24
CPCC09J7/30C09J143/04C09J11/06C09J7/255C09J7/245C09J7/241C08L2203/204C09J2429/006C09J2423/006C09J2467/006
Inventor 姚孝平刘勤学段旻刘钟斌
Owner 常州勤邦新材料科技有限公司