CN104356914B - A kind of solar energy backboard transparent polyurethane coating and preparation method thereof - Google Patents
A kind of solar energy backboard transparent polyurethane coating and preparation method thereof Download PDFInfo
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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The present invention relates to solar cell backboard technical field, and in particular to a kind of solar energy backboard transparent polyurethane coating and preparation method thereof, the transparent polyurethane coating is double-component system：Wherein, component A includes the raw material of following weight portion：5 50 parts of acrylic resin, 30 70 parts of fluororesin, 10 20 parts of organic solvent, 13 parts of catalyst, 13 parts of ultra-violet absorber, 12 parts of defoamer；Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent includes at least one in hexamethylene diisocyanate biruet, hexamethylene diisocyanate trimer and isophorone diisocyanate trimer；According to NCO/OH=0.9 1.2 ratio, transparent polyurethane coating is made.Transparent polyurethane coating relative inexpensiveness of the invention, raw material is easy to get, with excellent weatherability, corrosion resistance, adhesive force, UV resistant and hydrolytic resistance.
Description
Technical field
The present invention relates to solar cell backboard technical field, and in particular to a kind of solar energy backboard transparent polyurethane coating
And preparation method thereof.
Background technology
Solar cell backboard is located at the back side of solar panel, and protection and supporting role are played to cell piece, need to have
Reliable insulating properties, water preventing ability, ageing-resistant performance.In recent years with the rise of photovoltaic industry, each company is to solar photovoltaic
Pond backboard proposes various structures.It is domestic at present it is most common be TPT type fabric backplanes that Du Pont produces, it is by upper and lower
Two-layer fluorine film（PVF or PVDF）With middle polyester layer（PET）It is composited.Existing fluorine film dependence on import for a long time,
It is expensive, it is difficult to obtain.
The content of the invention
In order to overcome shortcoming and defect present in prior art, it is an object of the invention to provide a kind of solar energy backboard
Transparent polyurethane coating, the transparent polyurethane coating relative inexpensiveness, raw material is easy to get, and degree domestic is high, with excellent
Weatherability, corrosion resistance, adhesive force, UV resistant and hydrolytic resistance.
Another object of the present invention is to provide a kind of preparation method of solar energy backboard transparent polyurethane coating, the preparation
Method technique is simple, convenient operation and control, steady quality, and production efficiency is high, can large-scale industrial production.
The purpose of the present invention is achieved through the following technical solutions：A kind of solar energy backboard transparent polyurethane coating, it is described
Bright polyurethane coating is double-component system：
Wherein, component A includes the raw material of following weight portion：
Acrylic resin 5-50 parts
Fluororesin 30-70 parts
Organic solvent 10-20 parts
1-3 parts of catalyst
Ultra-violet absorber 1-3 parts
1-2 parts of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent includes hexa-methylene
In diisocynate biuret, hexamethylene diisocyanate trimer and isophorone diisocyanate trimer extremely
Few one kind；
According to NCO/OH=0.9-1.2 ratio, transparent polyurethane coating is made.
Preferably, the aliphatic polymeric isocyanate curing agent is by hexamethylene diisocyanate biruet and different Fo Er
Ketone diisocyanate trimer compares 1 with weight:The mixture of 1.5-2.5 compositions；Or, the aliphatic polymeric isocyanate solidification
Agent is to compare 0.8-1.2 by hexamethylene diisocyanate trimer and isophorone diisocyanate trimer with weight:1 composition
Mixture；Or, the aliphatic polymeric isocyanate curing agent is by hexamethylene diisocyanate biruet, hexa-methylene
Diisocyanate trimer and isophorone diisocyanate trimer compare 1 with weight:1.4-2.2:The mixture of 2-3 compositions.
Preferably, the component A includes the raw material of following weight portion：
10-40 parts of acrylic resin
- 60 parts of fluororesin 40
Organic solvent 12-18 parts
Catalyst 1.5-2.5 parts
Ultra-violet absorber 1.5-2.5 parts
1.2-1.8 parts of defoamer.
It is more highly preferred to, the component A includes the raw material of following parts by weight：
25 parts of acrylic resin
50 parts of fluororesin
15 parts of organic solvent
2 parts of catalyst
2 parts of ultra-violet absorber
1.5 parts of defoamer.
The transparent polyurethane coating of the present invention uses fluororesin, and fluororesin has good weatherability, resistance to ultraviolet, resistance to Huang
Become and corrosion resistance can improve the overall performance of backboard, but there is low, the surface hydrophobic of surface energy, binding agent is in fluoroplastics
Surface is not easy to launch, it is not easy to and the shortcoming of other plastic bondings.
Transparent polyurethane coating of the invention by using acrylic resin, acrylic resin have good adhesive force,
The advantages of resistance to ag(e)ing, water resistance, drying property, used cooperatively with fluororesin, it is low to solve fluorine coating adhesive force, is difficult adhesion
Problem.And cheap, convenient construction, greatly reduce backboard cost.
By acrylic resin and fluororesin compounding use, obtained transparent polyurethane coating both has fluororesin to the present invention
Preferable weatherability, resistance to ultraviolet, corrosion resistance, hydrolytic resistance, while with adhesive force higher, it may have polyurethane it is hard
The advantages of spending height, good corrosion resistance, good resistance to abrasiveness, has widened application field of the acrylic coating in photovoltaic back significantly.
It is preferred that, the acrylic resin is the acrylic resin of hydroxy functional groups.The hydroxy functional groups are not wrapped
Include the aromatic functional groups of easy xanthochromia.The present invention is by using the acrylic resin of hydroxy functional groups, obtained transparent poly- ammonia
Ester paint has the advantages that good adhesive force, resistance to ag(e)ing, water resistance, drying property.
Preferably, the solid content of the acrylic resin is 60%-70%.It is more highly preferred to, the acrylic resin is U.S.
The model Macrynal SM510N of Guo Qingte companies production acrylic resin, its solidification amount is 60%；Or, the propylene
Acid resin is the acrylic resin of the model CYTEC Macrynal SM515 of Qing Te companies of U.S. production, and its solid content is
70%；Or, the acrylic resin is the acrylic resin of the model Macrynal SM2810 of Qing Te companies of U.S. production,
Its solidification amount is 75%；Or, the acrylic resin is the acrylic acid for the model Setalux 1215 that Niu Peisi companies produce
Resin, its solidification amount is 67%；Or, the acrylic resin is the model Setalux's 1252 that Niu Peisi companies produce
Acrylic resin, its solidification amount is 65%；Or, the acrylic resin is the model Setalux of Niu Peisi companies production
1753 acrylic resin, its solidification amount is 70%.The present invention is made by using the acrylic resin that solid content is 60%-70%
Transparent polyurethane coating there is good adhesive force, resistance to ag(e)ing, water resistance and drying property.
Preferably, the fluororesin includes FEVE resins and/or PVDF resins.Be more highly preferred to, the fluororesin be by
FEVE resins and PVDF resins compare 1 with weight:The mixture of 1.5-2.5 compositions.The present invention by using FEVE resins and/or
PVDF resins, obtained transparent polyurethane coating has good weatherability, and resistance to ultraviolet, color inhibition and corrosion resistance can
Improve the overall performance of backboard.
Preferably, the organic solvent include benzene,toluene,xylene, ethyl acetate, butyl acetate, No. 100 solvent naphthas,
At least one in No. 150 solvent naphthas, No. 200 solvent naphthas, acetone, butanone and cyclohexanone.
It is preferred that, the catalyst includes tertiary amine catalyst and/or organometallic catalysts, tertiary amine catalyst bag
Include at least one in triethylenediamine, triethylamine and triethanolamine, organometallic catalysts include stannous octoate and/or
Dibutyl tin laurate.It is more highly preferred to, the catalyst is with weight by tertiary amine catalyst and organometallic catalysts
Amount compares 1:The mixture of 1.4-2.2 compositions；The tertiary amine catalyst is with weight ratio by triethylenediamine and triethanolamine
0.8-1.2:The mixture of 1 composition；The organometallic catalysts are with weight by stannous octoate and dibutyl tin laurate
Amount compares 1:The mixture of 2-3 compositions.The present invention is applied by using above-mentioned catalyst, excellent catalytic effect, obtained transparent polyurethane
Expect good weatherability, superior performance.
It is preferred that, the ultra-violet absorber includes benzotriazole ultraviolet absorbent and/or phentriazine class is purple
Ultraviolet absorbers.It is more highly preferred to, the ultra-violet absorber is purple by triazole ultra-violet absorber and phentriazine class
Ultraviolet absorbers compare 1.8-2.6 with weight:The mixture of 1 composition.The present invention is by using benzotriazole ultraviolet radiation absorption
Agent and/or phentriazine class ultra-violet absorber, obtained transparent polyurethane coating ultraviolet radiation absorption effect are good.
It is preferred that, the defoamer includes organic silicon defoamer and/or acryl-based antifoaming agent.It is more highly preferred to, institute
It is to compare 1 with weight by organic silicon defoamer and acryl-based antifoaming agent to state defoamer:The mixture of 0.8-1.2 compositions.This hair
It is bright by using organic silicon defoamer and/or acryl-based antifoaming agent, obtained transparent polyurethane coating good weatherability.
It is preferred that, the solid content of the aliphatic polymeric isocyanate curing agent is 70%-90%.It is more highly preferred to, the fat
The aliphatic polymeric isocyanate solidification that fat adoption isocyanate curing agent is the model Desmodur N75 that Bayer companies produce
Agent, its solid content 75%；Or, the aliphatic polymeric isocyanate curing agent is the model Desmodur of Bayer companies production
The aliphatic polymeric isocyanate curing agent of the BA/SN of N 3390, its solid content 90%；Or, the aliphatic polymeric isocyanate is consolidated
Agent is the aliphatic polymeric isocyanate curing agent for the MPA/X of model Desmodur Z 4470 that Bayer companies produce, and it is consolidated
Content 70%.The present invention is by the aliphatic polymeric isocyanate curing agent that solid content is 70%-90%, and solidification effect is good, obtained
Bright polyurethane coating good weatherability, superior performance.
Another object of the present invention is achieved through the following technical solutions：A kind of system of solar energy backboard transparent polyurethane coating
Preparation Method, comprises the following steps：
（1）Fluororesin and organic solvent are added, added in stirring acrylic resin, catalyst, ultra-violet absorber and
Defoamer, mixing speed is 1000-2000r/min, dispersed with stirring 1-3h, and component A is obtained；
（2）Component B is slowly added to step（1）In obtained component A, 1-20min, mixing speed 800-1500r/ are stirred
min；
（3）By step（2）Product after stirring is stood, filtering, and transparent polyurethane coating is made.
The beneficial effects of the present invention are：The transparent polyurethane coating of the present invention uses fluororesin, and fluororesin has fine
Weatherability, resistance to ultraviolet, color inhibition and corrosion resistance can improve the overall performance of backboard, but there is surface can low, surface
Hydrophobic, binding agent is not easy expansion on fluoroplastics surface, it is not easy to and the shortcoming of other plastic bondings.
The present invention transparent polyurethane coating by using acrylic resin, acrylic resin have good adhesive force,
The advantages of resistance to ag(e)ing, water resistance, drying property, used cooperatively with fluororesin, it is low to solve fluorine coating adhesive force, is difficult adhesion
Problem.And cheap, convenient construction, greatly reduce backboard cost.
By acrylic resin and fluororesin compounding use, obtained transparent polyurethane coating both has fluororesin to the present invention
Preferable weatherability, resistance to ultraviolet, corrosion resistance, hydrolytic resistance, while with higher adhesive force, it may have polyurethane it is hard
The advantages of spending height, good corrosion resistance, good resistance to abrasiveness, has widened application field of the acrylic coating in photovoltaic back significantly.
The preparation method technique of the present invention is simple, convenient operation and control, steady quality, and production efficiency is high, can large-scale industrial production.
Embodiment
For the ease of the understanding of those skilled in the art, with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying is referred to not limitation of the invention.
Embodiment 1
A kind of solar energy backboard transparent polyurethane coating, the transparent polyurethane coating is double-component system：
Wherein, component A is the raw material of following weight portion：
5 parts of acrylic resin
30 parts of fluororesin
10 parts of organic solvent
1 part of catalyst
1 part of ultra-violet absorber
1 part of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent is hexa-methylene two
Isocyanates biuret；
According to the ratio of NCO/OH=0.9-1.2, transparent polyurethane coating is obtained.
The acrylic resin is the acrylic resin of hydroxy functional groups.
The acrylic resin is the acrylic resin of the model Macrynal SM510N of Qing Te companies of U.S. production,
Its solidification amount is 60%.
The fluororesin is FEVE resins.
The organic solvent is toluene.
The catalyst be tertiary amine catalyst, the tertiary amine catalyst be by triethylenediamine and triethanolamine with
Weight compares 1:The mixture of 1 composition；
The ultra-violet absorber is benzotriazole ultraviolet absorbent.
The defoamer is organic silicon defoamer.
The aliphatic polymeric isocyanate curing agent is the aliphatic of the model Desmodur N75 of Bayer companies production
Polyisocyanate curing agent, its solid content 75%.
A kind of preparation method of solar energy backboard transparent polyurethane coating, comprises the following steps：
（1）Fluororesin and organic solvent are added, added in stirring acrylic resin, catalyst, ultra-violet absorber and
Defoamer, mixing speed is 1000r/min, dispersed with stirring 1h, and component A is made；
（2）Component B is slowly added to step（1）In obtained component A, 1min, mixing speed 800r/min are stirred；
（3）By step（2）Product after stirring is stood, filtering, and transparent polyurethane coating is made.
Embodiment 2
A kind of solar energy backboard transparent polyurethane coating, the transparent polyurethane coating is double-component system：
Wherein, component A is the raw material of following parts by weight：
10 parts of acrylic resin
Fluororesin 40 part
12 parts of organic solvent
1.5 parts of catalyst
1.5 parts of ultra-violet absorber
1.2 parts of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent is hexa-methylene two
Isocyanate trimer；
According to the ratio of NCO/OH=0.9-1.2, transparent polyurethane coating is obtained.
The acrylic resin is the acrylic resin of hydroxy functional groups.
The acrylic resin is the acrylic acid of the model CYTEC Macrynal SM515 of Qing Te companies of U.S. production
Resin, its solid content is 70%.
The fluororesin is PVDF resins.
The organic solvent is ethyl acetate.
The catalyst is organometallic catalysts, and the organometallic catalysts are by stannous octoate and two bays
Sour dibutyl tin compares 1 with weight:The mixture of 2 compositions.
The ultra-violet absorber is phentriazine class ultra-violet absorber.
The defoamer is acryl-based antifoaming agent.
The aliphatic polymeric isocyanate curing agent is the BA/ of model Desmodur N 3390 of Bayer companies production
The aliphatic polymeric isocyanate curing agent of SN, its solid content 90%.
A kind of preparation method of solar energy backboard transparent polyurethane coating, comprises the following steps：
（1）Fluororesin and organic solvent are added, added in stirring acrylic resin, catalyst, ultra-violet absorber and
Defoamer, mixing speed is 1200r/min, dispersed with stirring 1.5h, and component A is obtained；
（2）Component B is slowly added to step（1）In obtained component A, 5min, mixing speed 1000r/min are stirred；
（3）By step（2）Product after stirring is stood, filtering, and transparent polyurethane coating is made.
Embodiment 3
A kind of solar energy backboard transparent polyurethane coating, the transparent polyurethane coating is double-component system：
Wherein, component A is the raw material of following parts by weight：
25 parts of acrylic resin
50 parts of fluororesin
15 parts of organic solvent
2 parts of catalyst
2 parts of ultra-violet absorber
1.5 parts of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent is isophorone two
Isocyanate trimer；
According to the ratio of NCO/OH=0.9-1.2, transparent polyurethane coating is obtained.
The acrylic resin is the acrylic resin of hydroxy functional groups.
The acrylic resin is the acrylic resin for the model Macrynal SM2810 that Qing Te companies of the U.S. produce,
Its solidification amount is 70%.
The fluororesin is with weight ratio 1 by FEVE resins and PVDF resins:The mixture of 1.5 compositions.
The organic solvent is No. 100 solvent naphthas.
The catalyst is with weight ratio 1 by tertiary amine catalyst and organometallic catalysts:The mixing of 1.4 compositions
Thing；The tertiary amine catalyst is with weight ratio 1 by triethylenediamine and triethanolamine:The mixture of 1 composition；It is described organic
Metal-based catalysts are with weight ratio 1 by stannous octoate and dibutyl tin laurate:The mixture of 2.5 compositions.
The ultra-violet absorber is with weight by triazole ultra-violet absorber and phentriazine class ultra-violet absorber
Amount compares 1.8:The mixture of 1 composition.
The defoamer is to compare 1 with weight by organic silicon defoamer and acryl-based antifoaming agent:The mixing of 0.8 composition
Thing.
The aliphatic polymeric isocyanate curing agent is the MPA/ of model Desmodur Z 4470 that Bayer companies produce
The aliphatic polymeric isocyanate curing agent of X, its solid content 70%.
A kind of preparation method of solar energy backboard transparent polyurethane coating, comprises the following steps：
（1）Fluororesin and organic solvent are added, added in stirring acrylic resin, catalyst, ultra-violet absorber and
Defoamer, mixing speed is 1500r/min, dispersed with stirring 2h, and component A is obtained；
（2）Component B is slowly added to step（1）In obtained component A, 10min, mixing speed 1200r/min are stirred；
（3）By step（2）Product after stirring stands, filtering, and transparent polyurethane coating is obtained.
Embodiment 4
A kind of solar energy backboard transparent polyurethane coating, the transparent polyurethane coating is double-component system：
Wherein, component A is the raw material of following weight portion：
40 parts of acrylic resin
60 parts of fluororesin
18 parts of organic solvent
2.5 parts of catalyst
2.5 parts of ultra-violet absorber
1.8 parts of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent is by hexa-methylene
Diisocynate biuret and isophorone diisocyanate trimer compare 1 with weight:The mixture of 2 compositions；
According to NCO/OH=0.9-1.2 ratio, transparent polyurethane coating is made.
The acrylic resin is the acrylic resin of hydroxy functional groups.
The solid content of the acrylic resin is 60%-70%.The acrylic resin is the model that Niu Peisi companies produce
For Setalux 1215 acrylic resin, its solidification amount is 67%.
The fluororesin is with weight ratio 1 by FEVE resins and PVDF resins:The mixture of 2 compositions.
The organic solvent is acetone.
The catalyst is with weight ratio 1 by tertiary amine catalyst and organometallic catalysts:The mixing of 1.8 compositions
Thing；The tertiary amine catalyst is with weight ratio 1.2 by triethylenediamine and triethanolamine:The mixture of 1 composition；It is described to have
Machine metal-based catalysts are with weight ratio 1 by stannous octoate and dibutyl tin laurate:The mixture of 3 compositions.
The ultra-violet absorber is with weight by triazole ultra-violet absorber and phentriazine class ultra-violet absorber
Amount compares 2.2:The mixture of 1 composition.
The defoamer is with weight ratio 1 by organic silicon defoamer and acryl-based antifoaming agent:The mixture of 1 composition.
The aliphatic polymeric isocyanate curing agent is the aliphatic of the model Desmodur N75 of Bayer companies production
Polyisocyanate curing agent, its solid content 75%.
A kind of preparation method of solar energy backboard transparent polyurethane coating, comprises the following steps：
（1）Fluororesin and organic solvent are added, added in stirring acrylic resin, catalyst, ultra-violet absorber and
Defoamer, mixing speed is 1800r/min, dispersed with stirring 2.5h, and component A is obtained；
（2）Component B is slowly added to step（1）In obtained component A, 15min, mixing speed 1400r/min are stirred；
（3）By step（2）Product after stirring is stood, filtering, and transparent polyurethane coating is made.
Embodiment 5
A kind of solar energy backboard transparent polyurethane coating, the transparent polyurethane coating is double-component system：
Wherein, component A is the raw material of following weight portion：
50 parts of acrylic resin
70 parts of fluororesin
20 parts of organic solvent
3 parts of catalyst
3 parts of ultra-violet absorber
2 parts of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent is by hexa-methylene
Diisocyanate trimer and isophorone diisocyanate trimer are with weight ratio 1:The mixture of 1 composition.
According to NCO/OH=0.9-1.2 ratio, transparent polyurethane coating is made.
The acrylic resin is the acrylic resin of hydroxy functional groups.
The acrylic resin is the acrylic resin for the model Setalux 1252 that Niu Peisi companies produce, and it solidifies
Measure is 65%.
The fluororesin is to compare 1 with weight by FEVE resins and PVDF resins:The mixture of 2.5 compositions.
The organic solvent is cyclohexanone.
The catalyst is to compare 1 with weight by tertiary amine catalyst and organometallic catalysts:The mixing of 2.2 compositions
Thing；Tertiary amine catalyst is triethylenediamine, and organometallic catalysts are stannous octoate.
The ultra-violet absorber is with weight by triazole ultra-violet absorber and phentriazine class ultra-violet absorber
Amount compares 2.6:The mixture of 1 composition.
The defoamer is with weight ratio 1 by organic silicon defoamer and acryl-based antifoaming agent:The mixing of 1.2 compositions
Thing.
The aliphatic polymeric isocyanate curing agent is the BA/ of model Desmodur N 3390 of Bayer companies production
SN aliphatic polymeric isocyanate curing agent, its solid content 90%.
A kind of preparation method of solar energy backboard transparent polyurethane coating, comprises the following steps：
（1）Fluororesin and organic solvent are added, added in stirring acrylic resin, catalyst, ultra-violet absorber and
Defoamer, mixing speed is 2000r/min, dispersed with stirring 3h, and component A is obtained；
（2）Component B is slowly added to step（1）In obtained component A, 20min, mixing speed 1500r/min are stirred；
（3）By step（2）Product after stirring is stood, filtering, and transparent polyurethane coating is made.
Embodiment 6
The present embodiment is with the difference of above-described embodiment 1：The aliphatic polymeric isocyanate curing agent is by six
Methylene diisocyanate biuret, hexamethylene diisocyanate trimer and isophorone diisocyanate trimer are with weight
Amount compares 1:1.8:The mixture of 2.5 compositions；
The acrylic resin is the acrylic resin of the model Setalux 1753 of Niu Peisi companies production, its solidification
Measure is 70%.
The catalyst is to compare 1 with weight by tertiary amine catalyst and organometallic catalysts:The mixing of 1.8 compositions
Thing；Tertiary amine catalyst is triethanolamine, and organometallic catalysts are dibutyl tin laurate.
The aliphatic polymeric isocyanate curing agent is the MPA/ of model Desmodur Z 4470 of Bayer companies production
The aliphatic polymeric isocyanate curing agent of X, its solid content 70%.
By acrylic resin and fluororesin compounding use, obtained transparent polyurethane coating both has fluororesin to the present invention
Preferable weatherability, resistance to ultraviolet, corrosion resistance, hydrolytic resistance, while with adhesive force higher, it may have polyurethane it is hard
The advantages of degree height, good corrosion resistance, good resistance to abrasiveness, application field of the acrylic coating in photovoltaic back has been widened significantly.
The preparation method technique of the present invention is simple, convenient operation and control, steady quality, and production efficiency is high, can large-scale industrial production.
Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can be realized with other manner,
Any obvious replacement is within protection scope of the present invention on the premise of not departing from present inventive concept.
Claims (4)
1. a kind of solar energy backboard transparent polyurethane coating, it is characterised in that：The transparent polyurethane coating is double-component system：
Wherein, component A includes the raw material of following weight portion：
5-50 parts of acrylic resin
30-70 parts of fluororesin
Organic solvent 10-20 parts
Catalyst 1-3 parts
1-3 parts of ultra-violet absorber
1-2 parts of defoamer；
Component B is aliphatic polymeric isocyanate curing agent, and the aliphatic polymeric isocyanate curing agent includes that hexa-methylene two is different
In cyanate biuret, hexamethylene diisocyanate trimer and isophorone diisocyanate trimer at least one
Kind；
According to the ratio of NCO/OH=0.9-1.2, transparent polyurethane coating is obtained；
The solid content of the acrylic resin is 60%-70%；
The fluororesin is to compare 1 with weight by FEVE resins and PVDF resins:The mixture of 1.5-2.5 compositions；
The catalyst is with weight ratio 1 by tertiary amine catalyst and organometallic catalysts:The mixing of 1.4-2.2 compositions
Thing；The tertiary amine catalyst is to compare 0.8-1.2 with weight by triethylenediamine and triethanolamine:The mixture of 1 composition；
The organometallic catalysts are to compare 1 with weight by stannous octoate and dibutyl tin laurate:The mixture of 2-3 compositions；
The ultra-violet absorber is with weight ratio by triazole ultra-violet absorber and phentriazine class ultra-violet absorber
1.8-2.6:The mixture of 1 composition；
The defoamer is to compare 1 with weight by organic silicon defoamer and acryl-based antifoaming agent:The mixing of 0.8-1.2 compositions
Thing；
The solid content of the aliphatic polymeric isocyanate curing agent is 70%-90%.
2. a kind of solar energy backboard transparent polyurethane coating according to claim 1, it is characterised in that：The acrylic acid tree
Fat is the acrylic resin of hydroxy functional groups.
3. a kind of solar energy backboard transparent polyurethane coating according to claim 1, it is characterised in that：The organic solvent
Including benzene,toluene,xylene, ethyl acetate, butyl acetate, No. 100 solvent naphthas, No. 150 solvent naphthas, No. 200 solvent naphthas, third
At least one in ketone, butanone and cyclohexanone.
4. a kind of preparation method of the solar energy backboard transparent polyurethane coating as described in claim any one of 1-3, its feature
It is：Comprise the following steps：
（1）Fluororesin and organic solvent are added, acrylic resin, catalyst, ultra-violet absorber and froth breaking are added in stirring
Agent, mixing speed is 1000-2000r/min, dispersed with stirring 1-3h, and component A is made；
（2）Component B is slowly added to step（1）In obtained component A, 1-20min, mixing speed 800-1500r/min are stirred；
（3）By step（2）Product after stirring is stood, filtering, and transparent polyurethane coating is made.
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| CN105153679A (en) * | 2015-09-07 | 2015-12-16 | 东莞市雄林新材料科技股份有限公司 | TPU (thermoplastic polyurethane) composite membrane used for fan blades and preparation method for TPU composite membrane |
| CN107779015B (en) * | 2017-11-08 | 2020-04-03 | 苏州福斯特光伏材料有限公司 | Photovoltaic backboard repairing paint, repairing method using same and application |
| CN109321049B (en) * | 2018-09-26 | 2021-05-07 | 上海维凯光电新材料有限公司 | Coating composition for solar back panel and preparation method thereof |
| CN109735177B (en) * | 2018-12-07 | 2021-08-17 | 乐凯胶片股份有限公司 | Coating for solar cell back plate |
| CN110016283B (en) * | 2019-04-03 | 2021-08-17 | 乐凯胶片股份有限公司 | Coating for solar cell back plate |
| CN111434734A (en) * | 2019-07-15 | 2020-07-21 | 宁波激智科技股份有限公司 | Fluorocarbon coating liquid, hydrolysis-resistant transparent fluorocarbon coating and solar backboard using coating |
| CN110373102A (en) * | 2019-08-02 | 2019-10-25 | 湖南工业大学 | A kind of protective coating, protection bamboo wood and preparation method thereof |
| CN112745753B (en) * | 2020-12-30 | 2022-04-01 | 常州威斯敦粘合材料有限责任公司 | Outer layer transparent coating, photovoltaic transparent back plate and preparation method thereof |
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