CN116144227A - Non-fluorine weather-proof paint and application thereof - Google Patents
Non-fluorine weather-proof paint and application thereof Download PDFInfo
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- CN116144227A CN116144227A CN202211713216.3A CN202211713216A CN116144227A CN 116144227 A CN116144227 A CN 116144227A CN 202211713216 A CN202211713216 A CN 202211713216A CN 116144227 A CN116144227 A CN 116144227A
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- 239000011737 fluorine Substances 0.000 title claims abstract description 78
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 78
- 239000003973 paint Substances 0.000 title claims description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000000576 coating method Methods 0.000 claims abstract description 64
- 239000011248 coating agent Substances 0.000 claims abstract description 63
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 230000009477 glass transition Effects 0.000 claims abstract description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 37
- 239000012752 auxiliary agent Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 230000007062 hydrolysis Effects 0.000 claims description 12
- 238000006460 hydrolysis reaction Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 9
- 239000000326 ultraviolet stabilizing agent Substances 0.000 claims description 9
- 230000032683 aging Effects 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 8
- 150000002513 isocyanates Chemical class 0.000 claims description 8
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 5
- 229920001225 polyester resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 4
- HEQBUZNAOJCRSL-UHFFFAOYSA-N iron(ii) chromite Chemical compound [O-2].[O-2].[O-2].[Cr+3].[Fe+3] HEQBUZNAOJCRSL-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 150000001718 carbodiimides Chemical class 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000012963 UV stabilizer Substances 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 claims 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 229920000098 polyolefin Polymers 0.000 description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920002313 fluoropolymer Polymers 0.000 description 2
- 239000004811 fluoropolymer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- SITYOOWCYAYOKL-UHFFFAOYSA-N 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(3-dodecoxy-2-hydroxypropoxy)phenol Chemical compound OC1=CC(OCC(O)COCCCCCCCCCCCC)=CC=C1C1=NC(C=2C(=CC(C)=CC=2)C)=NC(C=2C(=CC(C)=CC=2)C)=N1 SITYOOWCYAYOKL-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a non-fluorine weather-proof coating and application thereof, wherein the non-fluorine weather-proof coating comprises 30-90% of non-fluorine weather-proof resin and 3-20% of curing agent by mass percent; the hydroxyl value of the non-fluorine weather-resistant resin is 10-80 mgKOH/g; the glass transition temperature of the non-fluorine weather-proof resin is-20-60 ℃. According to the invention, the non-fluorine weather-resistant coating can achieve weather resistance similar to fluorocarbon resin by selecting specific types of non-fluorine weather-resistant resin, has good adhesive force and weather resistance, is green and non-fluorine and environment-friendly, is used for the photovoltaic backboard, and has good bonding performance with a base material.
Description
Technical Field
The invention belongs to the technical field of coatings for photovoltaic backboard, and particularly relates to a non-fluorine weather-proof coating and application thereof.
Background
The solar cell module comprises a glass layer, an EVA packaging layer, a silicon wafer, an EVA packaging layer and a solar cell backboard. In order to achieve better weather resistance, the existing solar photovoltaic backboard adopts a fluorine-containing film or fluorine-containing paint as a protective layer, so that the polyethylene terephthalate film in the inner layer of the backboard is protected for a long time, and the backboard has good weather resistance. However, fluorine-containing backboard has high price and poor environmental protection, hydrogen fluoride is easy to generate in the recycling process, and more difficulties are brought to later-stage components.
The existing non-fluorine solar back plate is mainly prepared by co-extrusion of polyolefin materials, or is prepared by compounding a polyolefin film and a super weather-proof polyethylene terephthalate film. For example, CN108503959a discloses a polyolefin film for a solar cell back sheet, which at least comprises a three-layer structure, and by selecting different kinds of polyolefin materials, the obtained product has good adhesion performance with EVA and excellent aging resistance. However, the film-to-substrate layer adhesion properties are to be further improved.
CN110271254a discloses a novel transparent photovoltaic back plate, comprising in order: the transparent PET substrate layer comprises a transparent polyolefin inner layer, a first glue layer, a transparent PET substrate layer, a second glue layer and a transparent fluoropolymer weather-resistant layer. The back plate has excellent heat sealing performance, good weather resistance, good water vapor barrier property and low price. However, the photovoltaic back sheet still needs to be provided with a fluoropolymer weather-resistant layer, and has high cost and poor environmental protection.
Common disadvantages of the prior art: the backboard prepared by adopting the polyolefin coextrusion process has low strength and stiffness, and is easy to cause poor appearance problems such as wrinkling after lamination of the solar photovoltaic module; and the obtained solar photovoltaic backboard has the problem of poor heat resistance, and is easy to cause the hot spot failure of the component.
Therefore, developing a photovoltaic backboard material with good weather resistance, high bonding strength, good appearance, good heat resistance, low cost and good environmental protection is a technical problem to be solved in the field.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a non-fluorine weather-proof paint and application thereof. The non-fluorine weather-proof coating can achieve weather resistance similar to fluorocarbon resin by selecting specific types of non-fluorine weather-proof resin, and has good adhesive force, high stripping force and good bonding performance for the photovoltaic backboard and the base material.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a non-fluorine weather-resistant coating, which comprises, by mass, 30-90% of a non-fluorine weather-resistant resin and 3-20% of a curing agent; the hydroxyl value of the non-fluorine weather-resistant resin is 10-80 mgKOH/g; the glass transition temperature of the non-fluorine weather-proof resin is-20-60 ℃.
According to the invention, the non-fluorine weather-resistant resin with specific hydroxyl value and glass transition temperature is used for the EVA bonding surface and the air surface of the photovoltaic backboard, so that the photovoltaic backboard has better weather resistance, high stripping force, good adhesive force, low cost and good environmental protection.
Preferably, the non-fluorine weather-resistant coating comprises 30-90% by mass of non-fluorine weather-resistant resin, for example, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85% by mass and the like.
Preferably, the non-fluorine weather-resistant coating comprises 3 to 20% of a curing agent, for example, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18% and the like in terms of mass percent.
Preferably, the hydroxyl value of the non-fluorine weather resistant resin is 10 to 80mgKOH/g, and may be, for example, 15mgKOH/g, 18mgKOH/g, 20mgKOH/g, 22mgKOH/g, 25mgKOH/g, 28mgKOH/g, 30mgKOH/g, 32mgKOH/g, 35mgKOH/g, 38mgKOH/g, 40mgKOH/g, 42mgKOH/g, 45mgKOH/g, 48mgKOH/g, 50mgKOH/g, 52mgKOH/g, 55mgKOH/g, 58mgKOH/g, 60mgKOH/g, 62mgKOH/g, 65mgKOH/g, 68mgKOH/g, 70mgKOH/g, 72mgKOH/g, 75mgKOH/g, 78mgKOH/g, etc., more preferably 30 to 60mgKOH/g.
The glass transition temperature of the non-fluorine weather-resistant resin is preferably from-20 to 60 ℃, and may be, for example, from-15 ℃, -10 ℃, -5 ℃, 0 ℃, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45 ℃, 50 ℃, 55 ℃, and the like, and more preferably from-20 to 40 ℃.
Preferably, the non-fluorine weather-resistant resin includes at least one of a weather-resistant acrylic resin, a weather-resistant polyester resin, or a weather-resistant epoxy resin.
Preferably, the curing agent comprises an isocyanate curing agent and/or an amino group-containing curing agent.
Preferably, the non-fluorine weather-resistant coating further comprises 0.1 to 60% of filler by mass percent, for example, 1%, 2%, 4%, 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55% and the like.
Preferably, the mass ratio of the filler to the non-fluorine weather-resistant resin is (0.5-1): 1, for example, 0.55:1, 0.6:1, 0.65:1, 0.7:1, 0.75:1, 0.8:1, 0.85:1, 0.9:1, 0.95:1, and the like.
Preferably, the filler comprises at least one of titanium dioxide, barium sulfate, carbon black, talc, mica powder, copper chrome black, iron chrome black or silica.
Preferably, the non-fluorine weather-resistant coating further comprises 1-10% of an auxiliary agent, for example, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% and the like, in terms of mass percent.
Preferably, the auxiliary agent comprises at least one of an organotin catalyst, an ultraviolet aging auxiliary agent, a thermal oxidative aging auxiliary agent or a hydrolysis-resistant auxiliary agent.
Preferably, the ultraviolet aging aid includes an ultraviolet absorber and an ultraviolet stabilizer.
Preferably, the ultraviolet absorber in the non-fluorine weather-resistant coating is 0.2-0.8% by mass, for example, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8% by mass, and the like.
Preferably, the ultraviolet stabilizer in the non-fluorine weather-resistant coating is 0.8-1.2% by mass, for example, 0.85%, 0.9%, 0.95%, 1%, 1.15%, 1.18% by mass, and the like.
Preferably, the hydrolysis resistance aid comprises a carbodiimide.
Preferably, the hydrolysis resistance auxiliary agent in the non-fluorine weather-proof coating is 0.5-1.2% by mass, for example, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.85%, 0.9%, 0.95%, 1%, 1.15%, 1.18% and the like.
Preferably, the non-fluorine weatherable coating further comprises a solvent.
In a second aspect, the present invention provides a photovoltaic backsheet comprising a first coating layer, a substrate layer, and an inner tie layer laminated in sequence; the materials of the first coating layer and the inner bonding layer each independently comprise the non-fluorine weather-resistant paint in the first aspect.
The thickness of the first coating layer is preferably 2 to 30. Mu.m, for example, 4 μm, 6 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, etc., and more preferably 5 to 20. Mu.m.
The thickness of the inner adhesive layer is preferably 1 to 20. Mu.m, for example, 2 μm, 4 μm, 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, etc., and more preferably 2 to 10. Mu.m.
In a third aspect, the present invention provides a method for preparing the photovoltaic backsheet according to the second aspect, the method comprising:
and respectively coating the non-fluorine weather-proof coating on the upper surface and the lower surface of the substrate layer, drying and curing to obtain the photovoltaic backboard.
Preferably, the drying temperature is 140 to 180 ℃, and for example, 145 ℃, 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃, and the like can be used.
Preferably, the drying time is 0.5 to 3min, for example, 1min, 1.5min, 2min, 2.5min, etc.
In the invention, the drying process further comprises a curing step after the drying process is completed.
Preferably, the curing temperature is 30 to 70 ℃, for example, 40 ℃, 50 ℃, 60 ℃, 70 ℃ and the like.
Preferably, the aging time is 24 to 96hr, for example, 24hr, 36hr, 48hr, 60hr, etc.
In a third aspect, the invention provides a solar cell module, which comprises a glass layer, a first EVA packaging layer, a silicon wafer, a second EVA packaging layer and a solar cell backboard which are sequentially stacked; the solar cell backsheet comprises a photovoltaic backsheet as described in the second aspect; and an inner bonding layer in the photovoltaic backboard is connected with the second EVA packaging layer.
The numerical ranges recited herein include not only the recited point values, but also any point values between the recited numerical ranges that are not recited, and are limited to, and for the sake of brevity, the invention is not intended to be exhaustive of the specific point values that the recited range includes.
Compared with the prior art, the invention has the beneficial effects that:
according to the non-fluorine weather-resistant coating provided by the invention, the specific type of non-fluorine weather-resistant resin is selected, so that the weather-resistant performance similar to fluorocarbon resin can be achieved, the delta b is 0.9-1.2, the adhesion force with a substrate is good, and the peeling force with EVA is high and reaches more than 99N/cm.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
The materials used in the invention are as follows:
weather-resistant acrylic resin: BA2240, solid hydroxyl number: 33mgKOH/g, glass transition temperature 25 DEG C
Weather-resistant polyester resin: 51508-B-65, solid hydroxyl value: 45mgKOH/g, glass transition temperature of 30 DEG C
Isocyanate curing agent: wanhua HT-100
Ultraviolet absorber: tinuvin 123
Ultraviolet stabilizer: tinuvin 400
Hydrolysis resistance auxiliary agent: carbodiimide, shanghai Langyi New Material technology Co.Ltd Hymax1010
Example 1
The embodiment provides a non-fluorine weather-resistant coating, which comprises, by mass, 60% of weather-resistant acrylic resin, 34% of titanium dioxide, 3.5% of isocyanate curing agent, 0.5% of ultraviolet absorber, 1% of ultraviolet stabilizer and 1% of hydrolysis resistance auxiliary agent.
The embodiment provides a preparation method of a non-fluorine weather-resistant coating, which specifically comprises the following steps: mixing and dispersing weather-resistant acrylic resin, titanium dioxide, an ultraviolet absorber, an ultraviolet stabilizer, a hydrolysis-resistant auxiliary agent and a solvent butyl acetate (the content of which accounts for 30 percent of the total amount of the coating) to obtain the non-fluorine weather-resistant coating dispersion liquid; and then mixing the non-fluorine weather-proof coating dispersion liquid with isocyanate curing agent to obtain the non-fluorine weather-proof coating.
A photovoltaic backsheet comprising a first coating (15 μm, the coating provided in example 1), a substrate layer (polyethylene terephthalate film) and an inner tie layer (4 μm, the coating provided in example 1).
The preparation method of the photovoltaic backboard comprises the following steps: the coating provided in example 1 was applied to the upper surface (first coating layer) and the lower surface (inner adhesive layer) of the substrate layer, baked at 170 ℃ for 1.5min, and then cured at 50 ℃ for 60hr to obtain the photovoltaic backsheet.
Example 2
The embodiment provides a non-fluorine weather-resistant coating, which comprises, by mass, 52% of weather-resistant polyester resin, 40% of titanium dioxide, 5.5% of isocyanate curing agent, 0.5% of ultraviolet absorber, 1% of ultraviolet stabilizer and 1% of hydrolysis resistance auxiliary agent.
This example provides a method for preparing a non-fluorine weather-resistant coating, and the specific steps are the same as in example 1.
A photovoltaic backsheet differs from example 1 only in that the coating is provided in example 2, and other materials, structures, and methods of preparation are the same as in example 1.
Example 3
The embodiment provides a non-fluorine weather-resistant coating, which comprises, by mass, 52% of weather-resistant polyester resin, 10% of carbon black, 30% of barium sulfate, 5.5% of isocyanate curing agent, 0.5% of ultraviolet absorber, 1% of ultraviolet stabilizer and 1% of hydrolysis resistance auxiliary agent.
This example provides a method for preparing a non-fluorine weather-resistant coating, and the specific steps are the same as in example 1.
A photovoltaic backsheet differing from example 1 only in that the coating provided in example 3, the first coating had a thickness of 12 μm, and the other materials, structures and methods of preparation were the same as in example 1.
Example 4
The embodiment provides a non-fluorine weather-resistant coating, which comprises, by mass, 60% of weather-resistant acrylic resin, 7% of carbon black, 27% of barium sulfate, 3.5% of isocyanate curing agent, 0.5% of ultraviolet absorber, 1% of ultraviolet stabilizer and 1% of hydrolysis resistance auxiliary agent.
This example provides a method for preparing a non-fluorine weather-resistant coating, and the specific steps are the same as in example 1.
A photovoltaic backsheet differing from example 1 only in that the coating provided in example 4, the first coating had a thickness of 12 μm, and the other materials, structures and methods of preparation were the same as in example 1.
Example 5
The present example provides a non-fluorine weather-resistant coating, which differs from example 1 only in that the total amount of the non-fluorine weather-resistant resin and the filler is unchanged, the mass ratio is 0.4:1, and other raw materials, amounts and preparation methods are the same as those of example 1.
A photovoltaic backsheet differs from example 1 only in that the coating is provided in example 5, and other materials, structures, and methods of preparation are the same as in example 1.
Example 6
The present example provides a non-fluorine weather-resistant coating, which differs from example 1 only in that the total amount of the non-fluorine weather-resistant resin and the filler is unchanged, the mass ratio is 1.2:1, and other raw materials, amounts and preparation methods are the same as those of example 1.
A photovoltaic backsheet differs from example 1 only in that the coating is provided in example 6, and other materials, structures, and methods of preparation are the same as in example 1.
Comparative example 1
This comparative example provides a weather-resistant coating material differing from example 1 only in that the weather-resistant acrylic resin was replaced with a fluorocarbon resin (Sanyi Fu: ZHM-2), and other raw materials, amounts and preparation methods were the same as those of example 1.
A photovoltaic backsheet differs from example 1 only in that the coating is provided in comparative example 1, and other materials, structures, and methods of preparation are the same as in example 1.
Comparative example 2
This comparative example provides a polyolefin film (polyethylene film) which was laminated with a high weatherability polyethylene terephthalate film using glue to produce the desired backsheet.
Performance testing
(1) Adhesion force: testing according to GB/T9286-98 standard, and carrying out the tests on the surfaces of the outer layer and the inner bonding layer of the photovoltaic backboard provided by examples 1-6 and comparative examples 1-2;
(2) Peel force: bonding the surfaces of the inner bonding layers of the photovoltaic backboard provided in the examples 1-6 and the comparative examples 1-2 with EVA, and measuring the stripping force according to the GB 2792-2014 standard;
(3) Weather resistance: testing according to IEC61215 standard, ultraviolet irradiation of 300kwh, and testing yellowing
△b。
The specific test results are shown in table 1:
TABLE 1
As can be seen from the table, the non-fluorine weather-resistant coating provided by the invention has the advantages that the non-fluorine weather-resistant resin of a specific type is selected, and the hydroxyl value and the glass transition temperature of the non-fluorine weather-resistant resin are in a specific range, so that the coating can achieve weather resistance similar to that of fluorocarbon resin coating, has good adhesive force with a base material and has high stripping force with EVA; from examples 1 to 4, it is understood that the photovoltaic back sheet comprising the coating provided by the invention has a Deltab of 0.9 to 1.2, and the peeling force between EVA and the photovoltaic back sheet reaches 99 to 121N/cm, and the adhesion force between EVA and the substrate reaches 0 level.
As can be seen from the comparison of the example 1 with the comparative examples 1 and 2, the weather resistance of the coating provided by the invention is similar to that of fluorocarbon resin and better than that of polyolefin materials.
In conclusion, the non-fluorine weather-proof paint provided by the invention is prepared by compounding a fluorine-containing resin of a specific type with other components, so that the paint is used for a photovoltaic backboard, has good weather resistance, good adhesive force, high stripping force, low cost, no pollution and wide application range.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (10)
1. The non-fluorine weather-resistant coating is characterized by comprising, by mass, 30-90% of non-fluorine weather-resistant resin and 3-20% of curing agent;
the hydroxyl value of the non-fluorine weather-resistant resin is 10-80 mgKOH/g;
the glass transition temperature of the non-fluorine weather-proof resin is-20-60 ℃.
2. The non-fluorine weather resistant coating according to claim 1, wherein the non-fluorine weather resistant resin comprises at least one of a weather resistant acrylic resin, a weather resistant polyester resin, or a weather resistant epoxy resin;
preferably, the curing agent comprises an isocyanate curing agent and/or an amino group-containing curing agent.
3. The non-fluorine weather-resistant coating according to claim 1 or 2, characterized in that the non-fluorine weather-resistant coating further comprises 0.1 to 60% by mass of a filler;
preferably, the mass ratio of the filler to the non-fluorine weather-resistant resin is (0.5-1): 1;
preferably, the filler comprises at least one of titanium dioxide, barium sulfate, carbon black, talc, mica powder, copper chrome black, iron chrome black or silica.
4. The non-fluorine weather-resistant coating according to any one of claims 1 to 3, further comprising 1 to 10% by mass of an auxiliary agent;
preferably, the auxiliary agent comprises at least one of an organotin catalyst, an ultraviolet aging auxiliary agent, a thermal oxidative aging auxiliary agent or a hydrolysis-resistant auxiliary agent.
5. The non-fluorine weatherable coating according to claim 4, wherein the uv aging aid comprises a uv absorber and a uv stabilizer;
preferably, the ultraviolet absorber in the non-fluorine weather-proof coating is 0.2-0.8% by mass;
preferably, the ultraviolet stabilizer in the non-fluorine weather-proof coating is 0.8-1.2% by mass.
6. The non-fluorine weather resistant coating according to claim 4 or 5, wherein the hydrolysis resistant auxiliary agent comprises carbodiimide;
preferably, the non-fluorine weather-proof paint comprises 0.5-1.2% of hydrolysis resistance auxiliary agent by mass percent;
preferably, the non-fluorine weatherable coating further comprises a solvent.
7. The photovoltaic backboard is characterized by comprising a first coating, a substrate layer and an inner bonding layer which are sequentially laminated;
the materials of the first coating layer and the inner bonding layer each independently comprise the non-fluorine weather-resistant paint according to any one of claims 1 to 6.
8. The photovoltaic backsheet according to claim 7, characterized in that the thickness of the first coating is 2-30 μm, further preferably 5-20 μm;
preferably, the thickness of the inner adhesive layer is 1 to 20 μm, more preferably 2 to 10 μm.
9. A method of producing a photovoltaic backsheet according to claim 7 or 8, characterized in that the method of producing comprises:
respectively coating the non-fluorine weather-proof coating on the upper surface and the lower surface of the substrate layer, and drying to obtain the photovoltaic backboard;
preferably, the drying temperature is 140-180 ℃;
preferably, the drying time is 0.5 to 3 minutes.
10. The solar cell module is characterized by comprising a glass layer, a first EVA packaging layer, a silicon wafer, a second EVA packaging layer and a solar cell backboard which are sequentially stacked;
the solar cell backsheet comprising the photovoltaic backsheet of claim 7 or 8;
and an inner bonding layer in the photovoltaic backboard is connected with the second EVA packaging layer.
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