CN103709920A - Double-component polyurethane paint for solar cell backing films - Google Patents
Double-component polyurethane paint for solar cell backing films Download PDFInfo
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- CN103709920A CN103709920A CN201310722655.5A CN201310722655A CN103709920A CN 103709920 A CN103709920 A CN 103709920A CN 201310722655 A CN201310722655 A CN 201310722655A CN 103709920 A CN103709920 A CN 103709920A
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Abstract
The invention discloses a double-component polyurethane paint for solar cell backing films, which comprises a component A and a component B. The component A and component B are uniformly mixed in a mass ratio of (2-6):1 to obtain the polyurethane paint. The paint has the advantages of satisfactory mechanical properties for backing film application, excellent weather resistance, excellent ultraviolet resistance, favorable binding power with PET (polyethylene terephthalate) and low tendency to delamination, and can protect the solar cell for long-term high-efficiency operation.
Description
Technical field
The invention belongs to solar cell package technical field, be specifically related to a kind of bicomponent polyurethane coating that is applicable to solar cell package notacoria.
Background technology
Solar cell is a kind of device that because light produces volta effect, solar energy is converted into electric energy.In order to meet the design requirements of 25 years, better protect cell piece, according to the structure of glass-EVA-cell piece-EVA-notacoria, cell piece is encapsulated.Notacoria is positioned at the outermost layer of cell backside, is the very important integral part of photovoltaic cell, not only plays the effect of encapsulation, guarantees that battery is not affected by environment simultaneously, guarantees battery.
At present, the solar battery back film of main flow mostly is fluorine-containing notacoria, and fluorine-containing solar battery back film has compound and 2 kinds of structures of application type at present, and compound notacoria is large from being divided into 5 kinds of structure: TPT, TPE, KPK, KPE, PPE.Compound notacoria is due to reasons such as production technology and throughput, fluorine film is not also realized production domesticization at present, therefore the manufacturer of fluorine-containing notacoria is limited by external Fu Mo manufacturers for a long time, and Lead Time can not guarantee, impels compound fluorine-containing notacoria cost always high.Application type notacoria is because fluorine element in coating has minimum polarizability, and its molecule is nonpolar, and the outstanding behaviours of its polymkeric substance in chemical property is high-temperature stability and unreactiveness, causes fluorine coating itself and basement membrane PET and EVA adhesive fastness poor.
Bicomponent polyurethane coating is the high-quality new coating of environment-friendly type that development in recent years is got up, and polyurethane coating be take two-pack alcohol acid and polyurethane coating as main at present.The easy xanthochromia of conventional polyurethanes coating, only can by improving the raw material of polyurethane coating, select aliphatic isocyanates at present for indoor, can improve xanthochromia situation, improves weathering resistance.
Summary of the invention
The bicomponent polyurethane coating that the object of this invention is to provide a kind of solar battery back film use, strong adhesion good weatherability.
For achieving the above object, the present invention has adopted following technical scheme:
A solar battery back film bicomponent polyurethane coating, is characterized in that, this coating comprises A component and B component:
By percentage to the quality, described A component raw material comprises following component:
Resin: acroleic acid resin 25%～35%
Polyester resin 10%～20%
Epoxy resin 3%～10%
In its molecular chain of described epoxy resin, contain the groups such as a large amount of hydroxyls, ether and phenyl ring, in solidification process, these active functional groups can react and form firmly chemical bond with PET or EVA, strengthen the sticking power between coating and basement membrane, and can strengthen film flexibility; Separately, the active functional group on epoxy resin molecular chain also can form hydrogen bond with acroleic acid resin and polyester resin in solidification process, and then forms inierpeneirating network structure, reduces to a certain extent coating hydrolysis probability, strengthens coating compactness.
By percentage to the quality, described B component raw material comprises following component:
Preferably, described acroleic acid resin is that hydroxyl value is the hydroxyl acrylic resin of 110～160mgKOH/g; Described polyester resin is that hydroxyl value is linear saturated polyester's resin of 120～180mgKOH/g; The hydroxyl value of described epoxy resin is 90～130mgKOH/g.
Preferably, the particle diameter of described nanometer grade silica is 10nm～90nm.
Preferably, described catalyzer is the tin compounds such as stannous octoate, dibutyl-bis-(2-ethylhexanoate) tin, dibutyl tin dilaurate.
Further, described catalyzer is metal species catalyzer, and as tin compound, preferred, catalyzer is stannous octoate, and consumption is the double of the needed amount of popular response.The amount that has more the catalyzer of a times is only on the pending resin molecular chain that is against active functional group of the form with hydrogen bond, after coating is hydrolyzed in environment for use, can repair in time the ester bond of hydrolysis.
Preferably, described UV light absorber is one or more in inorganic nanometer powder, nano TiO 2 powder, zinc oxide nano-powder, ferric oxide nano powder.
Preferably, the quality proportioning of described A component and B component is (2～6): 1.
Preferably, in described A component and B component allocation process, the ratio of the content of isocyanic ester and the content of hydroxyl remains (1.0～1.5): 1.
Described titanium dioxide, dispersion agent, flow agent and defoamer are this area common pigments and auxiliary agent, select in the present invention a kind of or composite.
Solvent in described A, B component comprises: n-butyl acetate, isobutyl acetate, vinyl acetic monomer, propylene glycol monomethyl ether acetate, pimelinketone, methylethylketone, toluene, dimethylbenzene, trimethylbenzene etc., or several solvents composite among above.
Invention advantage:
Solar battery back film of the present invention meets mechanical property and excellent weather-proof, the uvioresistant performance of notacoria service requirements with bicomponent polyurethane coating, and this coating and PET cohesive force better, be difficult for delamination, can protect the long-term efficiency operation of solar cell.
Embodiment
Below in conjunction with preferred embodiment, technical scheme of the present invention is further described.
Embodiment 1
A kind of solar battery back film bicomponent polyurethane coating
By percentage to the quality, A component raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
The present embodiment in mass ratio 5:1 mixes A component with B component, get final product to obtain described coating.
Embodiment 2
A solar battery back film bicomponent polyurethane coating,
By percentage to the quality, A component raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
The present embodiment in mass ratio 4:1 mixes A component with B component, get final product to obtain described coating.
Embodiment 3
A solar battery back film bicomponent polyurethane coating,
By percentage to the quality, A component raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
The present embodiment in mass ratio 5:1 mixes A component with B component, get final product to obtain described coating.
Comparative example 1:
By percentage to the quality, this comparative example coating A component raw material comprises following component:
B component raw material comprises following component:
Solidifying agent: hexamethylene diisocyanate trimer 80%
Solvent: n-butyl acetate 20%
This comparative example in mass ratio 5:1 mixes A component with B component, get final product to obtain described coating.
Comparative example 2:
By percentage to the quality, this comparative example coating A component raw material comprises following component:
B component raw material comprises following component:
Solidifying agent: hexamethylene diisocyanate trimer 80%
Solvent: n-butyl acetate 20%
This comparative example in mass ratio 5:1 mixes A component with B component, get final product to obtain described coating.
Test and result:
Embodiment 1～3 and the prepared coating of comparative example 1～2 are sprayed on respectively on PET basement membrane, according to normal maturation program, its slaking is made to used for encapsulation of solar battery notacoria (fluorine film/PET/ embodiment 1～3 coating, comparative example 1～2 coating), thickness is preferably 5～20 μ m.The salient features of made notacoria is detected according to IEC61215 standard, and result is as table 1:
Table 1
From table one test result, can find out, embodiment 1～3 all can meet various standards, best in quality, meets service requirements completely.
Comparative example 1 is fluorocarbon coating, and hydrothermal aging test result is slight layering, illustrates that coating and PET cohesive force are not up to standard.
Comparative example 2 is conventional polyurethanes coating, does not add epoxy resin, and layering explanation coating and PET cohesive force are not up to standard; Resin degraded in cracking explanation coating; Δ b >=2.0 explanation ultra-violet resistance can be poor.
It is to be noted; as described above is only in order to explain the present invention's preferred embodiment; not attempt is done any formal restriction to the present invention according to this; be with; all any modification or changes that has the relevant the present invention that does under identical invention spirit, all must be included in the category that the invention is intended to protection.
Claims (8)
1. a solar battery back film bicomponent polyurethane coating, is characterized in that, this coating comprises A component and B component:
By percentage to the quality, described A component raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
2. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, described acroleic acid resin is that hydroxyl value is the hydroxyl acrylic resin of 110～160mgKOH/g; Described polyester resin is that hydroxyl value is linear saturated polyester's resin of 120～180mgKOH/g; The hydroxyl value of described epoxy resin is 90～130mgKOH/g.
3. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, the particle diameter of described nanometer grade silica is 10nm～90nm.
4. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, described catalyzer is the tin compounds such as stannous octoate, dibutyl-bis-(2-ethylhexanoate) tin, dibutyl tin dilaurate.
5. a kind of solar battery back film bicomponent polyurethane coating according to claim 4, is characterized in that, described catalyzer is metal species catalyzer, and as tin compound, consumption is the double of the needed amount of popular response.
6. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, it is characterized in that, described UV light absorber is inorganic nanometer powder, one or more in nano TiO 2 powder, zinc oxide nano-powder, ferric oxide nano powder.
7. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, the quality proportioning of described A component and B component is (2～6): 1.
8. a kind of solar battery back film bicomponent polyurethane coating according to claim 7, is characterized in that, in described A component and B component allocation process, the ratio of the content of isocyanic ester and the content of hydroxyl remains (1.0～1.5): 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310722655.5A CN103709920B (en) | 2013-12-24 | 2013-12-24 | A kind of solar battery back film bicomponent polyurethane coating |
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| CN201310722655.5A CN103709920B (en) | 2013-12-24 | 2013-12-24 | A kind of solar battery back film bicomponent polyurethane coating |
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| CN103709920A true CN103709920A (en) | 2014-04-09 |
| CN103709920B CN103709920B (en) | 2016-01-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104031530A (en) * | 2014-07-04 | 2014-09-10 | 成都新柯力化工科技有限公司 | Solar photoelectricity conversion coating and preparing method thereof |
| CN104356914A (en) * | 2014-11-28 | 2015-02-18 | 明冠新材料股份有限公司 | Solar back panel transparent polyurethane paint and preparation method thereof |
| CN106810975A (en) * | 2017-01-24 | 2017-06-09 | 宁夏清华园新能源科技有限公司 | For the light absorption paint and preparation method of planar vacuum glass solar water heater |
| CN107057539A (en) * | 2017-04-26 | 2017-08-18 | 安徽联硕实业有限公司 | Polyester powder coating for electromagnetic wire and preparation method thereof |
| CN108047910A (en) * | 2017-12-12 | 2018-05-18 | 广东韩亚薄膜科技有限公司 | Anti-ultraviolet water paint and preparation method and application |
| CN108290998A (en) * | 2015-11-23 | 2018-07-17 | 亨斯迈先进材料许可(瑞士)有限公司 | It is used to prepare the curable polyurethane composition of outdoor product and the product by its acquisition |
| CN109735180A (en) * | 2018-12-25 | 2019-05-10 | 宁波激智科技股份有限公司 | Protective layer coating composition and a kind of brightness enhancement film are hurt in a kind of resistance to compression |
| CN113683930A (en) * | 2021-09-28 | 2021-11-23 | 东莞南玻太阳能玻璃有限公司 | Photovoltaic cover plate glass water-based repair coating liquid and preparation method and application thereof |
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| JP2010016286A (en) * | 2008-07-07 | 2010-01-21 | Toppan Printing Co Ltd | Sheet for sealing backside of solar battery |
| CN102110728A (en) * | 2010-08-11 | 2011-06-29 | 宁波长阳科技有限公司 | Backing film of solar battery and preparation method thereof |
| JP2012082365A (en) * | 2010-10-14 | 2012-04-26 | Dic Corp | Curable coating composition, laminated polyester resin film and solar cell back sheet |
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| JP2013209506A (en) * | 2012-03-30 | 2013-10-10 | Dic Corp | Curable coating composition, laminated polyester resin film, and solar cell back sheet |
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Patent Citations (5)
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| JP2010016286A (en) * | 2008-07-07 | 2010-01-21 | Toppan Printing Co Ltd | Sheet for sealing backside of solar battery |
| CN102110728A (en) * | 2010-08-11 | 2011-06-29 | 宁波长阳科技有限公司 | Backing film of solar battery and preparation method thereof |
| JP2012082365A (en) * | 2010-10-14 | 2012-04-26 | Dic Corp | Curable coating composition, laminated polyester resin film and solar cell back sheet |
| JP2013199604A (en) * | 2012-03-26 | 2013-10-03 | Dic Corp | Curable coating composition, laminated polyester resin film, and solar cell backsheet |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104031530A (en) * | 2014-07-04 | 2014-09-10 | 成都新柯力化工科技有限公司 | Solar photoelectricity conversion coating and preparing method thereof |
| CN104031530B (en) * | 2014-07-04 | 2016-02-03 | 成都新柯力化工科技有限公司 | A kind of solar energy photoelectric conversion coating and preparation method thereof |
| CN104356914A (en) * | 2014-11-28 | 2015-02-18 | 明冠新材料股份有限公司 | Solar back panel transparent polyurethane paint and preparation method thereof |
| CN104356914B (en) * | 2014-11-28 | 2017-07-11 | 明冠新材料股份有限公司 | A kind of solar energy backboard transparent polyurethane coating and preparation method thereof |
| CN108290998A (en) * | 2015-11-23 | 2018-07-17 | 亨斯迈先进材料许可(瑞士)有限公司 | It is used to prepare the curable polyurethane composition of outdoor product and the product by its acquisition |
| CN106810975A (en) * | 2017-01-24 | 2017-06-09 | 宁夏清华园新能源科技有限公司 | For the light absorption paint and preparation method of planar vacuum glass solar water heater |
| CN107057539A (en) * | 2017-04-26 | 2017-08-18 | 安徽联硕实业有限公司 | Polyester powder coating for electromagnetic wire and preparation method thereof |
| CN108047910A (en) * | 2017-12-12 | 2018-05-18 | 广东韩亚薄膜科技有限公司 | Anti-ultraviolet water paint and preparation method and application |
| CN109735180A (en) * | 2018-12-25 | 2019-05-10 | 宁波激智科技股份有限公司 | Protective layer coating composition and a kind of brightness enhancement film are hurt in a kind of resistance to compression |
| CN113683930A (en) * | 2021-09-28 | 2021-11-23 | 东莞南玻太阳能玻璃有限公司 | Photovoltaic cover plate glass water-based repair coating liquid and preparation method and application thereof |
| CN113683930B (en) * | 2021-09-28 | 2022-05-31 | 东莞南玻太阳能玻璃有限公司 | Photovoltaic cover plate glass water-based repair coating liquid and preparation method and application thereof |
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