CN118064015A - High weather-resistant bonding coating for transparent back plate for solar cell module - Google Patents
High weather-resistant bonding coating for transparent back plate for solar cell module Download PDFInfo
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- CN118064015A CN118064015A CN202410262459.2A CN202410262459A CN118064015A CN 118064015 A CN118064015 A CN 118064015A CN 202410262459 A CN202410262459 A CN 202410262459A CN 118064015 A CN118064015 A CN 118064015A
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- fluorocarbon resin
- cell module
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- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 239000011248 coating agent Substances 0.000 title claims abstract description 61
- 229920005989 resin Polymers 0.000 claims abstract description 80
- 239000011347 resin Substances 0.000 claims abstract description 80
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical class FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 76
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 45
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 44
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 24
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 19
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 19
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 10
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims description 34
- 239000000853 adhesive Substances 0.000 claims description 32
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- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 4
- KBAYQFWFCOOCIC-GNVSMLMZSA-N [(1s,4ar,4bs,7s,8ar,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-1-yl]methanol Chemical compound OC[C@@]1(C)CCC[C@]2(C)[C@H]3CC[C@H](C(C)C)C[C@H]3CC[C@H]21 KBAYQFWFCOOCIC-GNVSMLMZSA-N 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- KCZQSKKNAGZQSZ-UHFFFAOYSA-N 1,3,5-tris(6-isocyanatohexyl)-1,3,5-triazin-2,4,6-trione Chemical group O=C=NCCCCCCN1C(=O)N(CCCCCCN=C=O)C(=O)N(CCCCCCN=C=O)C1=O KCZQSKKNAGZQSZ-UHFFFAOYSA-N 0.000 claims description 2
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- 239000000203 mixture Substances 0.000 abstract description 9
- 238000002360 preparation method Methods 0.000 description 22
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- 239000000463 material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000005038 ethylene vinyl acetate Substances 0.000 description 8
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 7
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000000227 grinding Methods 0.000 description 5
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
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- 125000001931 aliphatic group Chemical group 0.000 description 3
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- 238000001179 sorption measurement Methods 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000009792 diffusion process Methods 0.000 description 2
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- 239000011521 glass Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
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- 238000000926 separation method Methods 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LVASCWIMLIKXLA-CABCVRRESA-N 7-bromo-6-chloro-3-[3-[(2r,3s)-3-hydroxypiperidin-2-yl]-2-oxopropyl]quinazolin-4-one Chemical compound O[C@H]1CCCN[C@@H]1CC(=O)CN1C(=O)C2=CC(Cl)=C(Br)C=C2N=C1 LVASCWIMLIKXLA-CABCVRRESA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 241001528553 Malus asiatica Species 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
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- 125000003158 alcohol group Chemical group 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
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- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- SZEGKVHRCLBFKJ-UHFFFAOYSA-N n-methyloctadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCNC SZEGKVHRCLBFKJ-UHFFFAOYSA-N 0.000 description 1
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- 239000013638 trimer Substances 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The application relates to the field of bonding coatings, and particularly discloses a high weather-resistant bonding coating for a transparent back plate for a solar cell module. The high weather-resistant bonding coating for the transparent back plate for the solar cell module comprises the following raw materials in parts by weight: 15-20 parts of acrylic resin, 60-70 parts of modified fluorocarbon resin, 10-12 parts of curing agent, 1-1.5 parts of nano montmorillonite, 70-80 parts of ethyl acetate and 10-20 parts of toluene, wherein the modified fluorocarbon resin is obtained by modifying hydrogenated rosin alcohol. The composition provided by the application can be used for various scenes needing to use the solar cell module, and has the advantages of high binding power and good weather resistance.
Description
Technical Field
The application relates to the field of bonding coating, in particular to high weather-resistant bonding coating for a transparent back plate for a solar cell module.
Background
The solar photovoltaic module mainly comprises a glass cover plate, a hot melt adhesive film, a battery piece, a back plate, a junction box, a frame and the like, and in view of the development needs of integration of the double-sided photovoltaic power generation module and a photovoltaic building, the application of the transparent solar cell back plate is wider, the existing back plate mainly uses a polyester material as a substrate, and one side or both sides of the back plate are compounded or coated with a fluorine material with functionality, so that the back plate has good barrier, weather resistance and insulating properties, and a battery unit in the conventional solar cell module is clamped between front glass on the sunlight incidence side and the solar back plate arranged on the back side and is sealed through a packaging material (usually ethylene-vinyl acetate copolymer (EVA) resin). However, the polyester material and the EVA resin have larger polarity difference, and the polyester material and the EVA resin are difficult to directly adhere to each other, so that the polyester material and the EVA resin are required to be bonded through an intermediate bonding layer, bonding is realized through an adhesive, the current adhesive curing is realized through a whole roll curing mode, larger uncertainty exists, and the polyester material and the EVA resin are influenced by the environment in outdoor use, so that the bonding strength is easily reduced, the bonding effect is influenced, and the service life of the backboard is directly influenced.
Thus, there is a need to make a highly weatherable tie coating for transparent backsheets for solar cell modules.
Disclosure of Invention
In order to improve the weather resistance of the bonding coating, the application provides a high weather resistance bonding coating for a transparent back sheet for a solar cell module.
The application provides a high weather-resistant bonding coating for a transparent back plate for a solar cell module, which adopts the following technical scheme:
The high weather-resistant bonding coating for the transparent back plate for the solar cell module comprises the following raw materials in parts by weight:
15-20 parts of acrylic resin, 60-70 parts of modified fluorocarbon resin, 10-12 parts of curing agent, 1-1.5 parts of nano montmorillonite, 70-80 parts of ethyl acetate and 10-20 parts of toluene, wherein the modified fluorocarbon resin is obtained by modifying hydrogenated rosin alcohol.
By adopting the technical scheme, the prepared bonding coating has stronger polarity and good permeability, can well wet the surfaces of polyester materials and EVA resin to form stronger bonding effect, and the acrylic resin and the modified fluorocarbon resin undergo a crosslinking reaction under the action of the curing agent to form a cured product with a three-dimensional network structure, so that all components in the coating are firmly bonded together, the acrylic resin does not undergo further crosslinking in the coating film forming process, more crosslinking points of the adhesive in the curing process are avoided, the adhesive is greatly contracted in the curing process, and larger stress is generated, so that the bonding force of the bonding coating is reduced.
The modified fluorocarbon resin has better polarity, can ensure that the bonding coating keeps stable bonding strength in the long-term use process, has stable molecular structure, excellent weather resistance, can bear the test of environmental factors such as ultraviolet rays, humidity, temperature and the like for a long time, and improves the weather resistance of the bonding coating.
The addition of montmorillonite makes the resin molecule and montmorillonite layer in the adhesive paint form physical cross-linking, which can block the movement of the resin molecule chain segment, and can form network structure with the cross-linking reaction of the resin molecule, the montmorillonite can maintain the lamellar structure in the resin polymer, the lamellar structure has good sliding property, helps the resin matrix to disperse stress effectively, increases the dynamic viscosity of the adhesive paint, effectively transmits and disperses interface stress, and can maintain good mechanical property under the complex environment of damp and heat, and greatly improves the weather resistance of the paint.
Optionally, the modified fluorocarbon resin comprises 5-7 parts of hydrogenated rosin alcohol, 80-100 parts of fluorocarbon resin, 0.5-0.7 part of catalyst and 100-120 parts of ethyl acetate.
Through adopting above-mentioned technical scheme, hydrogenated rosin alcohol contains hydroxyl and ternary aliphatic ring structure, carry out the modification through hydrogenated rosin alcohol to fluorocarbon resin, introduce hydrogenated rosin alcohol's ternary aliphatic ring shape into bonding coating, strengthen fluorocarbon resin's polarity, make it more easy with the polarity form the hydrogen bond between great polyester and the EVA resin substrate, improve with the adhesion between the substrate, and the fluorocarbon resin through the modification has better wettability, more easy at substrate surface infiltration diffusion, form even adhesive linkage, be favorable to forming firm bonding with the substrate, improve bonding coating's weatherability.
Optionally, the modified fluorocarbon resin is prepared by the steps of:
Adding the hydroabietyl alcohol, fluorocarbon resin and catalyst into a solvent, stirring uniformly at room temperature, heating to 100-120 ℃, stirring and reacting for 4-6h, and cooling to room temperature to obtain the modified fluorocarbon resin.
By adopting the technical scheme, the prepared modified fluorocarbon resin has stable chemical property, the catalyst is added to accelerate the reaction speed of the hydrogenated rosin alcohol and the fluorocarbon resin, the purity and stability of the prepared modified fluorocarbon resin are improved, and the modified fluorocarbon resin is not easy to change and delaminate in the storage and use process.
Optionally, the catalyst is dibutyl tin dilaurate.
By adopting the technical scheme, the dibutyl tin dilaurate has good catalytic activity on the hydrogenated rosin alcohol and the fluorocarbon resin, can effectively accelerate the reaction rate of the hydrogenated rosin alcohol and the fluorocarbon resin, helps the isocyanate groups in the hydrogenated rosin alcohol react with the fluorocarbon resin, and introduces the hydrogenated rosin alcohol into the side chain of the fluorocarbon resin to generate the fluorocarbon resin with the hydrogenated rosin alcohol groups.
Optionally, the curing agent is1, 6-hexamethylene diisocyanate trimer.
By adopting the technical scheme, the 1, 6-hexamethylene diisocyanate trimer is used as the curing agent, contains fewer secondary amine bonds, has fewer broken nitrogen-hydrogen bonds under the condition of being irradiated by ultraviolet rays, avoids the degradation of molecular chains, and ensures the weather resistance of the bonding coating.
Optionally, the nano montmorillonite is prepared by the following steps:
Dispersing montmorillonite in mixed solution of ethanol and deionized water in the weight ratio of 1:1-1.5, heating to 80-100 deg.c, stirring at high speed, adding cetyl trimethyl ammonium bromide, and stirring to react. And after the solution is stood for layering, naturally cooling, washing and high-speed centrifugal separation are carried out, the nano montmorillonite is prepared.
By adopting the technical scheme, the nano montmorillonite with smaller particle size is obtained by preprocessing the montmorillonite, so that the nano montmorillonite has better dispersibility and solubility, can be better dispersed in the coating, adsorbs organic molecules, and is beneficial to the diffusion and adsorption of other organic molecules in the raw material among montmorillonite layers.
Optionally, the ratio of the montmorillonite to the hexadecyl trimethyl ammonium bromide in parts by weight is 10: (1-2).
By adopting the technical scheme, the cetyl trimethyl ammonium bromide is taken as a modifier to participate in the reaction, so that the heat resistance and the stability of the montmorillonite can be improved, and the cetyl trimethyl ammonium bromide with a proper proportion is added to be adsorbed on the surface of the montmorillonite, so that the repulsive force between the positively charged montmorillonite sheets is increased, nano-scale particles are formed, and meanwhile, the hydrophobic groups connected with the montmorillonite prevent aggregation between the montmorillonite sheets, so that the dispersibility in the paint is further improved.
Optionally, the raw materials also comprise 1-3 parts of vinyl trimethoxy silane.
By adopting the technical scheme, the vinyl trimethoxy silane can react with polymer molecular chains, so that the compatibility and the fluidity of the polymer are further improved, the crosslinking reaction of the polymer chains is promoted, and the weather resistance of the coating is improved.
In summary, the application has the following beneficial effects:
1. The modified fluorocarbon resin is used as the main component of the coating, so that the fluorocarbon resin has stable molecular structure and excellent weather resistance, can bear the test of environmental factors such as ultraviolet rays, temperature, humidity and the like for a long time, and ensures the bonding strength of the bonding coating.
2. In the application, acrylic resin, isocyanate and modified fluorocarbon resin are preferably mixed, and the reaction is carried out to generate a high polymer through crosslinking reaction, wherein the isocyanate helps to improve the adhesive property of the paint, and the lamellar structure of the nano montmorillonite is uniformly dispersed in the paint to form the adhesive paint with good weather resistance and strong adhesive property.
3. According to the preparation method, the specific nano montmorillonite is selected, the nano montmorillonite with a lamellar structure is obtained, the resin molecules in the adsorption coating increase the dynamic viscosity of the bonding coating, the interfacial stress is effectively transferred and dispersed, the influence of shrinkage of the bonding coating on the bonding force is avoided, and the bonding coating is ensured to maintain good bonding performance.
Detailed Description
The present application will be described in further detail with reference to examples.
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The hydroabinol is purchased from Jining Malus asiatica chemical industry Co., ltd., model ABITOL-E; hexamethylene diisocyanate was purchased from Mitsui chemical Co., ltd., model HT-100; fluorocarbon resins are available from Guangzhou Material supply chain service Co., ltd, have a component content of 76.+ -. 2% and a density of 0.85-0.87; acrylic model FB44.
Preparation example of modified fluorocarbon resin
Preparation example 1
A modified fluorocarbon resin, the preparation comprising the steps of:
Adding 0.5kg of hydrogenated rosin alcohol, 8kg of fluorocarbon resin and 0.06kg of catalyst into 10kg of ethyl acetate, stirring uniformly at room temperature, heating to 100 ℃, stirring and reacting for 6h, and cooling to room temperature to obtain modified fluorocarbon resin; the catalyst is dibutyl tin dilaurate.
Preparation example 2
A modified fluorocarbon resin, the preparation comprising the steps of:
Adding 0.6kg of hydrogenated rosin alcohol, 9kg of fluorocarbon resin and 0.07kg of catalyst into 11kg of ethyl acetate, stirring uniformly at room temperature, heating to 110 ℃, stirring and reacting for 5 hours, and cooling to room temperature to obtain modified fluorocarbon resin; the catalyst is dibutyl tin dilaurate.
Preparation example 3
A modified fluorocarbon resin, the preparation comprising the steps of:
adding 0.7kg of hydrogenated rosin alcohol, 10kg of fluorocarbon resin and 0.05kg of catalyst into 12kg of ethyl acetate, stirring uniformly at room temperature, heating to 120 ℃, stirring and reacting for 4 hours, and cooling to room temperature to obtain modified fluorocarbon resin; the catalyst is dibutyl tin dilaurate.
Preparation example 4
The modified fluorocarbon resin was different from preparation example 1 in that the catalyst used in this preparation example was azobisisobutyronitrile.
Preparation example of nano montmorillonite
Preparation example 5
The nano montmorillonite is prepared by the following steps:
dispersing 2kg of montmorillonite into 5kg of mixed solution of ethanol and deionized water in a weight ratio of 1:1, heating to 80 ℃, stirring at a high speed for 1.5h, adding 0.5kg of cetyltrimethylammonium bromide, continuing stirring for reacting for 2h, standing and layering the solution, naturally cooling, repeatedly cleaning with deionized water until 1.0% silver nitrate solution is dropwise added and no white or yellow precipitate exists, centrifuging at a high speed, separating to obtain nano montmorillonite, drying the nano montmorillonite to constant weight at a low temperature, crushing, and grinding to 300 meshes for later use.
Preparation example 6
The nano montmorillonite is prepared by the following steps:
Dispersing 2kg of montmorillonite into 5kg of mixed solution of ethanol and deionized water in a weight ratio of 1:1.25, heating to 100 ℃, stirring at a high speed for 1.5h, adding 0.4kg of cetyltrimethylammonium bromide, continuously stirring for reacting for 2h, standing for layering, naturally cooling, repeatedly cleaning with deionized water until 1.0% silver nitrate solution is dropwise added without white or yellow precipitation, centrifuging at a high speed, separating to obtain nano montmorillonite, drying the nano montmorillonite to constant weight at a low temperature, crushing, and grinding to 300 meshes for later use.
Examples
Example 1
A highly weatherable tie coating for a transparent backsheet for a solar module, the preparation comprising the steps of:
Adding 6kg of modified fluorocarbon resin, 4kg of ethyl acetate, 2kg of toluene and 0.15kg of nano montmorillonite into a container in sequence, dispersing uniformly at high speed, then introducing into a grinder for grinding, controlling the fineness of the paint to be less than 5 mu m, discharging to obtain a fluorocarbon paint premix, adding 1.5kg of acrylic resin into the premix for secondary dispersion, and dispersing uniformly at high speed to obtain the fluorocarbon paint mixture. Pouring the fluorocarbon coating mixture, 1kg of hexamethylene diisocyanate (curing agent) and 4kg of ethyl acetate into a container, and uniformly mixing to obtain the high weather-resistant adhesive coating for the transparent back plate for the solar cell module; the modified fluorocarbon resin is the modified fluorocarbon resin prepared in preparation example 1, and the nano montmorillonite is prepared in preparation example 5.
Examples 2 to 3
A highly weatherable adhesive coating for a transparent backsheet for a solar cell module, which is different from example 1 in that the raw materials and the parts by weight thereof are shown in table 1.
TABLE 1 raw materials and weights (kg) of the raw materials in examples 1 to 3
| Component (A) | Example 1 | Example 2 | Example 3 |
| Modified fluorocarbon resin | 6 | 6.5 | 7 |
| Acetic acid ethyl ester | 8 | 6 | 7.5 |
| Toluene (toluene) | 2 | 1.5 | 1.0 |
| Nano montmorillonite | 0.15 | 0.1 | 0.125 |
| Hexamethylene diisocyanate | 0.8 | 10 | 0.9 |
| Acrylic resin | 1.5 | 2.0 | 1.75 |
Example 4
A highly weather-resistant adhesive coating for a transparent back sheet for a solar cell module was different from example 1 in that the modified fluorocarbon resin used in this example was the modified fluorocarbon resin produced in production example 2.
Example 5
A highly weather-resistant adhesive coating for a transparent back sheet for a solar cell module was different from example 1 in that the modified fluorocarbon resin used in this example was the modified fluorocarbon resin prepared in preparation example 3.
Example 6
A highly weather-resistant adhesive coating for a transparent back sheet for a solar cell module was different from example 1 in that the modified fluorocarbon resin used in this example was the modified fluorocarbon resin prepared in preparation example 4.
Example 7
The difference between the high weather-resistant adhesive coating for transparent back sheet for solar cell module and example 1 is that the nano montmorillonite used in this example is nano montmorillonite prepared in preparation example 6.
Example 8
The difference between the high weather-resistant adhesive coating for the transparent back plate for the solar cell module and the example 1 is that the nano montmorillonite used in the implementation is commercially available nano montmorillonite treated by octadecyl methyl amine, and the model is DK-1N.
Example 9
A highly weatherable adhesive coating for a transparent backsheet for a solar cell module, which is different from example 1 in that the raw material in this example further includes 3kg of vinyltrimethoxysilane, the preparation includes the steps of: adding 6kg of modified fluorocarbon resin, 4kg of ethyl acetate, 2kg of toluene and 0.15kg of nano montmorillonite into a container in sequence, dispersing uniformly at high speed, then introducing into a grinder for grinding, controlling the fineness of the paint to be less than 5 mu m, discharging to obtain a fluorocarbon paint premix, adding 1.5kg of acrylic resin and 3kg of vinyl trimethoxysilane into the premix for secondary dispersion, and obtaining the fluorocarbon paint mixture after dispersing uniformly at high speed. Pouring the fluorocarbon coating mixture, 1kg of hexamethylene diisocyanate (curing agent) and 4kg of ethyl acetate into a container, and uniformly mixing to obtain the high weather-resistant adhesive coating for the transparent back plate for the solar cell module.
Comparative example
Comparative example 1
A highly weather-resistant adhesive coating for a transparent back sheet for a solar cell module was different from example 1 in that an unmodified fluorocarbon resin was used in this comparative example.
Comparative example 2
A highly weather-resistant adhesive coating for a transparent back sheet for a solar cell module, which is different from comparative example 1 in that 0.5kg of hydroabietyl alcohol was added to the raw material, was prepared comprising the steps of:
6kg of fluorocarbon resin, 4kg of ethyl acetate, 2kg of toluene and 0.15kg of nano montmorillonite are sequentially added into a container, after being dispersed uniformly at high speed, the mixture is introduced into a grinder for grinding, the fineness of the coating is controlled below 5 mu m, then the mixture is discharged to obtain a fluorocarbon coating premix, and then 1.5kg of acrylic resin is added into the premix for secondary dispersion, and after being dispersed uniformly at high speed, the fluorocarbon coating mixture is obtained. After the fluorocarbon coating mixture, 1kg of hexamethylene diisocyanate (curing agent), 4kg of ethyl acetate and 0.5kg of hydrogenated rosin alcohol are poured into a container and uniformly mixed, the high weather-resistant adhesive coating for the transparent back plate for the solar cell module is obtained, and the nano montmorillonite is prepared in preparation example 5.
Performance test
Detection method/test method
The backboard adopts a dry type compounding method. Firstly, carrying out corona on PET, then selecting a proper silk stick to coat the prepared bonding coating on a PET substrate, then putting the PET into an oven for drying, evaporating the solvent in the adhesive, then carrying out hot-pressing compounding with a film, and curing after compounding.
The method for measuring the interlayer adhesive force of the backboard comprises the following steps: the interlayer cohesive force of the back plate is measured according to the method provided by national standard GB/T2790-1995 adhesive 180 DEG peel force intensity test method-Flexible Material vs. rigid Material; aging the laminated piece double 95 (the temperature is 95 ℃ and the humidity is 95%) for 10 days, and balancing for 24 hours at the temperature of 25+/-2 ℃ after taking out to detect the adhesive force of the paint, wherein the higher the peeling strength is, the stronger the adhesive force of the two surfaces is, and the stronger the separation resistance is; the ageing test was carried out with an ultraviolet ageing oven at 120kWh/m 2, the air temperature 60℃and irradiance 45w/m 2, and the yellowness index was recorded. .
Table 2 test results
As can be seen from the combination of examples 1-3 and comparative examples 1-2 and the combination of table 2, each test data of examples 1-3 is superior to comparative examples 1-2, which shows that the addition of the fluorocarbon resin modified with the hydroterpineol in advance can be in the molecular chain of the fluorocarbon resin because of the ternary aliphatic ring structure, enhance the polarity of the fluorocarbon resin, form hydrogen bonds with the substrate, and improve the bonding firmness with the substrate, thereby improving the weather resistance of the bonding coating.
As can be seen from examples 1 to 6 in combination with table 2, each experimental data of examples 1 to 5 is superior to example 6, which shows that the modified fluorocarbon resin prepared by the method of the present application has good compatibility with other raw materials in the coating, and simultaneously increases the hydroxyl content in the fluorocarbon resin, forms more hydrogen bonds, and increases the binding capacity of the coating. The selection of the catalyst influences the modification effect of the final fluorocarbon resin, and the dibutyl tin dilaurate is selected to show better catalytic activity on the hydrogenated rosin alcohol and the fluorocarbon resin, so that more hydroxyl and polar groups are introduced into the fluorocarbon resin, and the bonding capability is improved.
As can be seen from the combination of examples 1 and examples 7-8 and table 2, the experimental data of examples 1 and 7 are better than example 8, which demonstrates that the method of using the modified montmorillonite of the present application has better dispersion and adsorption with other materials in the paint, thereby improving the weatherability of the cohesive paint.
As can be seen from the combination of example 1 and example 9 and the combination of table 2, each experimental data of example 9 is superior to example 1, which shows that the addition of vinyltrimethoxysilane can further improve the compatibility and flowability of the polymer, and the siloxane bond on the vinyltrimethoxysilane reacts with hydroxyl or carboxyl in fluorocarbon resin to introduce a group which can resist high temperature and is hydrophobic into the coating, thereby further improving the weather resistance of the adhesive coating.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (8)
1. The high weather-resistant bonding coating for the transparent back plate for the solar cell module is characterized by comprising the following raw materials in parts by weight:
15-20 parts of acrylic resin, 60-70 parts of modified fluorocarbon resin, 10-12 parts of curing agent, 1-1.5 parts of nano montmorillonite, 70-80 parts of ethyl acetate and 10-20 parts of toluene, wherein the modified fluorocarbon resin is obtained by modifying hydrogenated rosin alcohol.
2. The high weather-resistant adhesive coating for a transparent back sheet for a solar cell module according to claim 1, wherein: the modified fluorocarbon resin comprises 5-7 parts of hydrogenated rosin alcohol, 80-100 parts of fluorocarbon resin, 0.5-0.7 part of catalyst and 100-120 parts of ethyl acetate.
3. The high weather resistant adhesive coating for a transparent back sheet for solar cell modules according to claim 2, wherein the modified fluorocarbon resin is prepared by the steps of:
Adding the hydroabietyl alcohol, fluorocarbon resin and catalyst into a solvent, stirring uniformly at room temperature, heating to 100-120 ℃, stirring and reacting for 4-6h, and cooling to room temperature to obtain the modified fluorocarbon resin.
4. A highly weatherable tie-coating for a transparent backsheet for a solar cell module according to claim 2, characterized in that: the catalyst is dibutyl tin dilaurate.
5. The high weather-resistant adhesive coating for a transparent back sheet for a solar cell module according to claim 1, wherein: the curing agent is 1, 6-hexamethylene diisocyanate trimer.
6. The high weather-resistant adhesive coating for a transparent back sheet for a solar cell module according to claim 1, wherein: the nano montmorillonite is prepared by the following steps:
Dispersing montmorillonite in mixed solution of ethanol and deionized water in the weight ratio of 1:1-1.5, heating to 80-100deg.C, stirring at high speed, adding cetyltrimethylammonium bromide, stirring for reaction, standing for layering, naturally cooling, washing, and centrifuging at high speed to obtain nano montmorillonite.
7. The high weather-resistant adhesive coating for a transparent back sheet for a solar cell module according to claim 6, wherein: the weight ratio of montmorillonite to cetyl trimethyl ammonium bromide is 10: (1-2).
8. The high weather-resistant adhesive coating for a transparent back sheet for a solar cell module according to claim 1, wherein: the raw materials also comprise 1-3 parts of vinyl trimethoxy silane.
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