CN103709920B - A kind of solar battery back film bicomponent polyurethane coating - Google Patents
A kind of solar battery back film bicomponent polyurethane coating Download PDFInfo
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- CN103709920B CN103709920B CN201310722655.5A CN201310722655A CN103709920B CN 103709920 B CN103709920 B CN 103709920B CN 201310722655 A CN201310722655 A CN 201310722655A CN 103709920 B CN103709920 B CN 103709920B
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Abstract
The invention discloses a kind of solar battery back film bicomponent polyurethane coating, this coating comprises A, B two component, in mass ratio by component A with B component in (2 ~ 6): the ratio of 1 mixes, and namely obtains described polyurethane coating after mixing.Coating of the present invention has the mechanical property and excellent weather-proof, uvioresistant performance that meet notacoria service requirements, and this coating and PET cohesive force are better, and not easily delamination, can protect the long-term efficiency operation of solar cell.
Description
Technical field
The invention belongs to solar cell package technical field, be specifically related to a kind of bicomponent polyurethane coating being applicable to solar cell package notacoria.
Background technology
Solar cell is a kind of device because light produces volta effect, solar energy being converted into electric energy.In order to meet the design requirements of 25 years, better protecting cell piece, according to the structure of glass-EVA-cell piece-EVA-notacoria, cell piece being 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, ensures 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 application type 2 kinds of structures at present, and compound notacoria is greatly from being divided into 5 kinds of structures: TPT, TPE, KPK, KPE, PPE.Compound notacoria is due to the reason such as production technology and throughput, current fluorine film does not also realize production domesticization, therefore the manufacturer of fluorine-containing notacoria is limited by external Fu Mo manufacturers for a long time, and Lead Time can not ensure, impels compound fluorine-containing notacoria cost to remain high always.Application type notacoria has minimum polarizability due to fluorine element in coating, and its molecule is nonpolar, and the outstanding behaviours of its polymkeric substance in chemical property is high-temperature stability and unreactiveness, cause fluoro coatings 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 current polyurethane coating is based on two-pack alcohol acid and polyurethane coating.The easy xanthochromia of conventional polyurethanes coating, only can be used for indoor, at present by improving the raw material of polyurethane coating, selecting aliphatic isocyanates, can improve xanthochromia situation, improves weathering resistance.
Summary of the invention
The object of this invention is to provide the bicomponent polyurethane coating of a kind of solar battery back film use, strong adhesion good weatherability.
For achieving the above object, present invention employs following technical scheme:
A kind of solar battery back film bicomponent polyurethane coating, it is characterized in that, this coating comprises component A and B component:
By percentage to the quality, described component A raw material comprises following component:
Resin: acroleic acid resin 25% ~ 35%
Polyester resin 10% ~ 20%
Epoxy resin 3% ~ 10%
Containing groups such as a large amount of hydroxyl, ether and phenyl ring in its molecular chain of described epoxy resin, in the curing process, these labile functional groups can react with PET or EVA and form firmly chemical bond, strengthen the sticking power between coating and basement membrane, and can strengthen film flexibility; Separately, the labile functional groups on epoxy resin molecular chain also can form hydrogen bond with acroleic acid resin and polyester resin in the curing process, and then forms inierpeneirating network structure, reduces coating hydrolysis probability to a certain extent, strengthens coating compactness.
By percentage to the quality, described B component raw material comprises following component:
Preferably, the hydroxyl acrylic resin of described acroleic acid resin to be hydroxyl value be 110 ~ 160mgKOH/g; Linear saturated polyester's resin of described polyester resin to be hydroxyl value be 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 stannous octoate, tin compound such as dibutyl-two (2-ethylhexanoate) tin, dibutyl tin dilaurate etc.
Further, described catalyzer is metal-based catalysts, and as tin compound, preferably, catalyzer is stannous octoate, the amount of consumption required for popular response double.The amount having more the catalyzer of a times is only be against on the resin molecular chain of labile functional groups so that the form of hydrogen bond is pending, after coating is hydrolyzed in environment for use, can repair the ester bond of hydrolysis in time.
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 component A and B component is (2 ~ 6): 1.
Preferably, described component A remains (1.0 ~ 1.5) with the ratio of the content of isocyanic ester in B component allocation process with the content of hydroxyl: 1.
Described titanium dioxide, dispersion agent, flow agent and defoamer are this area common pigments and auxiliary agent, select a kind of or composite in the present invention.
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 above among several solvent composite.
Invention advantage:
Solar battery back film bicomponent polyurethane coating of the present invention meets the mechanical property of notacoria service requirements and excellent weather-proof, uvioresistant performance, and this coating and PET cohesive force are better, and not easily 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, component A raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
Component A mixes with B component by the present embodiment in mass ratio 5:1, described coating.
Embodiment 2
A kind of solar battery back film bicomponent polyurethane coating,
By percentage to the quality, component A raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
Component A mixes with B component by the present embodiment in mass ratio 4:1, described coating.
Embodiment 3
A kind of solar battery back film bicomponent polyurethane coating,
By percentage to the quality, component A raw material comprises following component:
By percentage to the quality, described B component raw material comprises following component:
Component A mixes with B component by the present embodiment in mass ratio 5:1, described coating.
Comparative example 1:
By percentage to the quality, this comparative example coating component A raw material comprises following component:
B component raw material comprises following component:
Solidifying agent: hexamethylene diisocyanate trimer 80%
Solvent: n-butyl acetate 20%
Component A mixes with B component by this comparative example in mass ratio 5:1, described coating.
Comparative example 2:
By percentage to the quality, this comparative example coating component A raw material comprises following component:
B component raw material comprises following component:
Solidifying agent: hexamethylene diisocyanate trimer 80%
Solvent: n-butyl acetate 20%
Component A mixes with B component by this comparative example in mass ratio 5:1, described coating.
Test and result:
Coating prepared by embodiment 1 ~ 3 and comparative example 1 ~ 2 is sprayed on PET basement membrane respectively, according to normal maturation program, notacoria used for encapsulation of solar battery (fluorine film/PET/ embodiment 1 ~ 3 coating is made in its slaking, comparative example 1 ~ 2 coating), thickness is preferably 5 ~ 20 μm.Detect according to IEC61215 standard the salient features of made notacoria, result is as table 1:
Table 1
Can find out from table one test result, embodiment 1 ~ 3 all can meet various standard, best in quality, meets service requirements completely.
Comparative example 1 is fluorocarbon coating, and hydrothermal aging test result is slight layering, illustrate coating and PET cohesive force not up to standard.
Comparative example 2 is conventional polyurethanes coating, does not add epoxy resin, layering illustrate coating and PET cohesive force not up to standard; Cracking illustrates resin degraded in coating; Δ b >=2.0 illustrate that ultra-violet resistance can be poor.
It is to be noted; as described above is only the preferred embodiment explaining the present invention; not attempt does any restriction in form to the present invention according to this; be with; all any modification or changes having 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 (5)
1. a solar battery back film bicomponent polyurethane coating, is characterized in that, this coating comprises component A and B component:
By percentage to the quality, described component A raw material comprises following component:
Resin: acroleic acid resin 25% ~ 35%
Polyester resin 10% ~ 20%
Epoxy resin 3% ~ 10%
Tinting pigment: nanometer grade silica 2% ~ 15%
Titanium dioxide 12% ~ 35%
Solvent: 5% ~ 25%;
By percentage to the quality, described B component raw material comprises following component:
Solidifying agent: toluene diisocyanate trimer 1% ~ 5%
Hexamethylene diisocyanate trimer 50% ~ 90%
Isophorone diisocyanate trimer 5% ~ 15%
Solvent: 5% ~ 30%;
The hydroxyl acrylic resin of described acroleic acid resin to be hydroxyl value be 110 ~ 160mgKOH/g; Linear saturated polyester's resin of described polyester resin to be hydroxyl value be 120 ~ 180mgKOH/g; The hydroxyl value of described epoxy resin is 90 ~ 130mgKOH/g.
2. 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.
3. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, described catalyzer is stannous octoate, dibutyl-two (2-ethylhexanoate) tin, dibutyl tin dilaurate.
4. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, described UV light absorber is one or more in nano TiO 2 powder, zinc oxide nano-powder, ferric oxide nano powder.
5. a kind of solar battery back film bicomponent polyurethane coating according to claim 1, is characterized in that, the quality proportioning of described component A and B component is (2 ~ 6): 1.
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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 CN103709920A (en) | 2014-04-09 |
| CN103709920B true CN103709920B (en) | 2016-01-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| MX2018006314A (en) * | 2015-11-23 | 2018-08-29 | Huntsman Adv Mat Licensing Switzerland Gmbh | A curable polyurethane composition for the preparation of outdoor articles, and the articles obtained therefrom. |
| 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 |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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