CN110396331A - One kind can recoat flexible fluorocarbon coating - Google Patents
One kind can recoat flexible fluorocarbon coating Download PDFInfo
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- CN110396331A CN110396331A CN201910805867.7A CN201910805867A CN110396331A CN 110396331 A CN110396331 A CN 110396331A CN 201910805867 A CN201910805867 A CN 201910805867A CN 110396331 A CN110396331 A CN 110396331A
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- fluorocarbon
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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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1668—Vinyl-type 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses one kind can recoat flexible fluorocarbon coating, it is A and B bicomponent system, using the flexible fluorocarbon resin system of low Tg, adjusts soft, hard solidification agent component ratio, reaction forms soft, the staggered inierpeneirating network structure of hard segment after solidification, improves the paint film flexibility of film-forming resin;By adding the needle shape wollastonite powder handled through silane coupling agent, improve fluorocarbon resin to the wetability of powder, the mechanical impact property of enhancing cured paint film enhancing coating reduces crackle;Improve fluorocarbon coating recoatability using being used in compounding for substrate wetting agents, promotes the integrated application performance of coating.
Description
Technical field
The present invention relates to surface protection technique field, in particular to one kind can recoat flexible fluorocarbon coating.
Background technique
The construction of China's high-speed rail and freeway net is advised with the trip habit for changing Chinese residents is improved with activity
Rule, brings ultra-large social and economic benefit, at the same time, the large-span steels structure bridge such as suspension bridge, cable-stayed bridge, arch bridge
It comes into being;Due to the flexibility of large-span steel structure bridge structure itself is big, rigidity with damp the feature that small, fundamental frequency is low, the period is grown,
There is radial and axial relative deformation under the action of the vibration generated during wind load and vehicle pass-through;Fluorocarbon coating because
Steel structure bridge corrosion-resistant field has obtained more and more applications to its excellent weatherability outdoors, especially to harsh marine corrosion ring
For border, fluorocarbon coating has shown that its status to become more and more important, but conventional fluorocarbon coating usually rigidity is larger, and shape occurs to easy
The steel structure bridge adaptability of change is poor, simultaneously because the low-surface-energy characteristic of its fluorocarbon resin, recoatability is bad, cannot be complete
Adapt to the assembly technology requirement of modern bridge industry.
Chinese patent CN105419602B discloses a kind of anticorrosion normal temperature solidifying fluorine-carbon coating and preparation method thereof,
The middle film forming system using FEVE fluorocarbon resin and Isocyanates curing agent, utilizes nano-titanium dioxide and nano ceric oxide
Complex effect, further improve the weatherability of fluororine-carbon coating, can preferably be applied to harsh environment under railway concrete
The anti-corrosion protection of structure and steel structure surface, but its deformation for being difficult to adapt to steel structure bridge, paint coatings Yi Gang structure bridge
It is cracked at beam deformation, protection benefit is lost, steel structure bridge is caused to weather disease.
Summary of the invention
It is an object of the invention to overcome the conventional fluorocarbon coating usually rigidity in the presence of the prior art larger, to easy hair
The steel structure bridge adaptability of raw deformation is poor, cracked at fluorocarbon coating coating Yi Gang structure bridge deformation in use process,
Protection benefit is lost, causes steel structure bridge to weather the above-mentioned deficiency of disease, flexible fluorocarbon coating can be recoated by providing one kind.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
One kind can recoat flexible fluorocarbon coating, be A and B bicomponent system, and 100 mass parts include:
Component A:
B component: 1.5~2 parts of polyisocyanate trimer
Elastic cured dose 10.3~12.1 parts
2~3 parts of B component solvent;
Wherein, fluorocarbon resin is the low Tg's (glass transition temperature) of chlorotrifluoroethylene and vinyl ethers alternating copolymerization structure
FEVE fluorocarbon resin, value≤20 DEG C Tg, fluorocarbon resin solid part account for the 50% of fluorocarbon resin, and fluorocarbon resin solid part is in dry film matter
Content >=43% in amount, other auxiliary agents include one of thixotropic agent, defoaming agent, dispersing agent and light stabilizer or a variety of.
Preferably, fluorocarbon resin is LF600X resin.
Preferably, the fluorocarbon coating, 100 mass parts include:
Component A:
B component: 1.6~1.8 parts of polyisocyanate trimer
Elastic cured dose 9.4~11.2 parts
2.4~2.9 parts of B component solvent.
Preferably, polyisocyanate trimer be hexamethylene diisocyanate (HDI) tripolymer, solid content >=
90%.
Preferably, elastic cured dose is the aliphatic polymeric isocyanate being made of hexamethylene diisocyanate (HDI),
NCO (isocyanate group) content≤8%.
Preferably, the mass ratio of elastic cured dose and polyisocyanate trimer is 1.8~3.4: 1.
Preferably, substrate wetting agents are polyether siloxane copolymer.
Preferably, modified grammite is the needle shape wollastonite powder modified by 3- mercaptopropyl trimethoxysilane.
It is further preferred that needle shape wollastonite powder partial size is 1250 mesh.
Preferably, isocyanate index is 1.07~1.11 in bicomponent system.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
It is of the present invention to recoat flexible fluorocarbon coating, using the flexible fluorocarbon resin system of low Tg, adjust soft, hard solid
Agent component ratio, reaction forms soft, the staggered inierpeneirating network structure of hard segment after solidification, and the paint film for improving film-forming resin is flexible
Property;By adding the needle shape wollastonite powder handled through silane coupling agent, improve fluorocarbon resin to the wetability of powder, enhancing solidification
Paint film enhances the mechanical impact property of coating, reduces crackle;Improve fluorocarbon coating weight using being used in compounding for substrate wetting agents
Tu Xing promotes the integrated application performance of coating;The fluorocarbon coating has excellent weatherability, chemical stability and water-fast, resistance to is stained with
Dirt, preparation process is simple, easy for construction, and tensile strength is big, and elongation rate of tensile failure is up to 180% or more, resistance to artificial weathering aging
Light-protection rate is greater than 80% after 6000 hours, has excellent weather resistance, and with good from recoatability, the conventional window time that recoats reaches product
By 7~14 days, using it is of the present invention recoat flexible fluorocarbon coating can satisfy super-span steel bridge actual use in
The requirement of long-life, anti-deformation and overlength recoating phase.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
One kind of the present invention can recoat flexible fluorocarbon coating, be A and B bicomponent system.
Component A: 47.2Kg fluorocarbon resin (AGC company LF600X) and 4.8Kg butyl acetate are added in compounding jar, added
Enter 1.63Kg thixotropic agent (Degussa R972), with 800r/min revolving speed high speed dispersion 20min to uniform;
0.23Kg dispersing agent (Digao 610s) is added under 500r/min revolving speed, sequentially adds 13.8Kg after dispersing 10min
Rutile titanium white powder (R818), 0.5Kg carbon black (N660), 1Kg medium chrome yellow, the processed modified wollastonite powder of 1.4Kg, dispersion
30 μm of fineness or less are ground to after 30min;
Addition 0.36Kg substrate wetting agents (Digao 450), 0.23Kg defoaming agent (Merck MOK6021), 0.64Kg light are stablized
Agent (Ciba 5151) and remaining butyl acetate solvent disperse 20min to uniform under 600r/min revolving speed, obtain A
Component.
B component: it is elastic cured that 3Kg butyl acetate, 1.9Kg HDI trimer (Bayer 3390) and 12Kg are added in compounding jar
Agent (Asahi Chemical Industry E402-90T) is dispersed to uniformly under 500r/min revolving speed, obtains B component.
Embodiment 2
One kind of the present invention can recoat flexible fluorocarbon coating, be A and B bicomponent system.
Component A: including 51.5Kg fluorocarbon resin (AGC company LF600X), 13.2Kg rutile titanium white powder (R818),
0.2Kg carbon black (N660), the processed modified wollastonite powder of 1.3Kg, 1.5Kg bentonite (BP-183B), 0.2Kg dispersing agent (enlightening
It is high 628), 0.2Kg defoaming agent (Merck MOK6021), 0.62Kg light stabilizer (Ciba 5151), 0.34Kg substrate wetting agents
(Digao Wet KL 245), 6Kg butyl acetate, 9Kg dimethylbenzene, the preparation method is the same as that of Example 1.
B component: including elastic cured dose of 10.9Kg (Asahi Chemical Industry E405-80T), 1.8Kg HDI trimer (BASF HI
190B/S), 2.9Kg butyl acetate, the preparation method is the same as that of Example 1.
Embodiment 3
One kind of the present invention can recoat flexible fluorocarbon coating, be A and B bicomponent system.
Component A: including 53.6Kg fluorocarbon resin (AGC company LF600X), 12.4Kg rutile titanium white powder (R962),
The ultra-dispersed type auxiliary rheological agents of the processed modified wollastonite powder of 1.2Kg, 10Kg (the modest Benge1828 of this moral of hamming), 1.4Kg wetting
Dispersing agent (Bi Ke byk163), 0.21Kg defoaming agent (BASF Efka EFKA2722), 0.57Kg light stabilizer (Ciba
5151), 0.32Kg substrate wetting agents (Digao tego450), 5Kg butyl acetate, 7.8Kg dimethylbenzene, 1.2Kg ethylene glycol ethyl ether vinegar
Acid esters, the preparation method is the same as that of Example 1.
B component: including elastic cured dose of 10.3Kg (Asahi Chemical Industry E402-90T), 1.7Kg HDI trimer (BASF HI
190B/S), 2.6Kg butyl acetate, the preparation method is the same as that of Example 1.
Embodiment 4
One kind of the present invention can recoat flexible fluorocarbon coating, be A and B bicomponent system.
Component A: including 56.2Kg fluorocarbon resin (AGC company LF600X), 11.4Kg rutile titanium white powder, 1.1Kg through locating
Modified wollastonite powder, 1.3Kg fumed silica (R972), 0.18Kg wetting dispersing agent (Digao 610s), the 0.14Kg of reason disappear
Infusion (BASF Efka EFKA2722), 0.28Kg substrate wetting agents (Clariant UD505), 0.19Kg defoaming agent (Merck
MOK6021), 0.51Kg light stabilizer (BASF 5060), 5Kg butyl acetate, 7.5Kg dimethylbenzene, the same embodiment of preparation method
1。
B component: including elastic cured dose of 11.2Kg (Asahi Chemical Industry E402-90T), 1.6Kg HDI trimer (Bayer 3390),
2.4Kg butyl acetate, the preparation method is the same as that of Example 1.
Embodiment 5
One kind of the present invention can recoat flexible fluorocarbon coating, be A and B bicomponent system.
Component A: including 58.3Kg fluorocarbon resin (AGC company LF600X), 10.1Kg titanium dioxide, 1.0Kg is processed changes
Property wollastonite in powder, 1.2Kg fumed silica (R972), 0.17Kg wetting dispersing agent (Digao 610s), 0.13Kg defoaming agent (bar
This husband Efka EFKA2722), 0.17Kg defoaming agent (Merck MOK6021), 0.26Kg substrate wetting agents (Digao Wet505),
0.47Kg light stabilizer (UV-9), 4.5Kg butyl acetate, 11.4Kg dimethylbenzene, the preparation method is the same as that of Example 1.
B component: including elastic cured dose of 13Kg (Asahi Chemical Industry E405-80T), 1.5Kg HDI trimer (Bayer 3390),
2.2Kg butyl acetate, the preparation method is the same as that of Example 1.
Comparative example 1
A kind of fluorocarbon coating is grouped as by two groups of A, B.
Component A: including 25.5Kg fluorocarbon resin (AGC company LF600X), 16.9Kg titanium dioxide, 1.77Kg gas phase titanium dioxide
Silicon (R972), 0.26Kg wetting dispersing agent (Digao 610s), 0.2Kg defoaming agent (BASF Efka EFKA2722), 0.26Kg
Defoaming agent (Merck MOK6021), 0.71Kg light stabilizer (UV-9), 6.9Kg butyl acetate, 10.3Kg dimethylbenzene, preparation method
With embodiment 1.
B component: including elastic cured dose of 4.0Kg (Asahi Chemical Industry E402-90T), 1.7Kg HDI trimer (Bayer 3390),
3.4Kg butyl acetate, the preparation method is the same as that of Example 1.
Comparative example 2
A kind of fluorocarbon coating is grouped as by two groups of A, B.
Component A: including 48.9Kg fluorocarbon resin (AGC company LF600X), 15.8Kg titanium dioxide, 1.6Kg gas phase titanium dioxide
Silicon (R972), 0.24Kg wetting dispersing agent (Digao 610s), 0.24Kg defoaming agent (BASF Efka EFKA2722), 0.18Kg
Defoaming agent (Merck MOK6021), 0.36Kg substrate wetting agents (Digao Wet505), 0.66Kg light stabilizer (UV-9), 6.4Kg vinegar
Acid butyl ester, 9.6Kg dimethylbenzene, the preparation method is the same as that of Example 1.
B component: including elastic cured dose of 10.4Kg (Asahi Chemical Industry E402-90T), 1.1Kg HDI trimer (BASF HI
190B/S), 3.1Kg butyl acetate, the preparation method is the same as that of Example 1.
Performance test
The flexible paint prepared in embodiment 1-5, comparative example 1-2 is tested for the property.
Products obtained therefrom is evenly coated on substrate, dry 2h reaches surface drying at 25 DEG C, then is placed in 80 DEG C of baking oven, 2h
It is dry afterwards to be drawn off completely, the test of performance indicator is carried out according to following measuring methods, test result is referring to table 1.
Impact strength: it is measured according to chinese national standard GB/T1732-1993 " paint film impact resistance measuring method ".
Flexibility: its suppleness is measured according to chinese national standard GB/T1731-1993 " paint film flexibility measuring method ".
Elongation at break: paint film requires that free film is made, and thickness is not less than 100 μm, after dry, paint film is cut into GB/T
Dumbbell shaped type as defined in 528-2009 " measurement of vulcanized rubber or thermoplastic elastomer tensile stress-strain performance ", in 50mm/min
The testing machine of movement speed is measured.
Tensile strength: paint film requires that free film is made, and thickness is not less than 100 μm, after dry, paint film is cut into GB/T
Dumbbell shaped type as defined in 528-2009 " measurement of vulcanized rubber or thermoplastic elastomer tensile stress-strain performance ", in 50mm/min
The testing machine of movement speed is measured.
Salt water resistance, alkali resistance, acid resistance: according to chinese national standard GB/T9274-1988, " paint and varnish resistant to liquid is situated between
The measurement of matter " first method (infusion method) regulation progress.
Paint film adhesion (pulls open method): according to chinese national standard GB/T5210-2006, " paint and varnish pulls open method attachment
Power test " regulation progress.
Light aging resisting: according to chinese national standard GB/T 14522-2008 " Industry Machinery plastics, coating, rubber
Material artificial weathering test method fluorescent ultraviolet lamp " standard fluorescence ultraviolet light/agglutination,cold test method regulation progress, it uses
UVB light source, illumination and condensation period are 4h illumination, 4h condensation.
Recoatability: according to chinese national standard GB/T 34681-2017 " paint and varnish coatings system and recoatability
Measurement " carry out test evaluation.
Table 1, the performance test results
As shown above, comprehensive performance obtained is all applied than fluorine carbon obtained in comparative example 1-2 in 1-5 of the embodiment of the present invention
Expect, wherein the comprehensive performance in embodiment 3 is best;The flexible fluorocarbon resin of comparative example 1 accounts for dry film mass content less than 43%, leads
Paint film totally inclined brittleness is caused, elongation at break only reaches 80%, and non-deformability is insufficient;Flexible fluorocarbon resin accounts in comparative example 2
Dry film mass content is 45%, but the mass ratio of elastic cured dose and polyisocyanate trimer is more than 3.4: 1, has reached 4: 1.
Paint film is excessively soft, and elongation at break index is higher, and adhesive force is insufficient, is unable to satisfy long-acting application requirement, while comparative example 1-2 is recoated
Test has that ply adhesion is obvious insufficient.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. one kind can recoat flexible fluorocarbon coating, which is characterized in that it is A and B bicomponent system, and 100 mass parts include:
Component A: 47.2~58.3 parts of fluorocarbon resin
11.1~15.3 parts of pigments and fillers
1~1.4 part of modified grammite
0.26~0.36 part of substrate wetting agents
11.4~15.7 parts of component A solvent
2.0~3.0 parts of other auxiliary agents;
B component: 1.5~2 parts of polyisocyanate trimer
Elastic cured dose 10.3~12.1 parts
2~3 parts of B component solvent;
Wherein, fluorocarbon resin is the FEVE fluorocarbon resin of the low Tg of chlorotrifluoroethylene and vinyl ethers alternating copolymerization structure, Tg value
≤ 20 DEG C, fluorocarbon resin solid part accounts for the 50% of fluorocarbon resin, fluorocarbon resin solid part content >=43% in dry film quality,
Other auxiliary agents include one of thixotropic agent, defoaming agent, dispersing agent and light stabilizer or a variety of.
2. fluorocarbon coating according to claim 1, which is characterized in that its 100 mass parts includes:
Component A: 51.5~56.2 parts of fluorocarbon resin
12.5~14.7 parts of pigments and fillers
1.1~1.3 parts of modified grammite
0.28~0.34 part of substrate wetting agents
12.5~15.1 parts of component A solvent
2.3~2.7 parts of other auxiliary agents;
B component: 1.6~1.8 parts of polyisocyanate trimer
Elastic cured dose 9.4~11.2 parts
2.4~2.9 parts of B component solvent.
3. fluorocarbon coating according to claim 1, which is characterized in that polyisocyanate trimer is two isocyanide of hexa-methylene
Acid esters tripolymer, solid content >=90%.
4. fluorocarbon coating according to claim 1, which is characterized in that elastic cured dose is by hexamethylene diisocyanate
The aliphatic polymeric isocyanate of composition, NCO content≤8%.
5. fluorocarbon coating according to claim 1, which is characterized in that elastic cured dose with the matter of polyisocyanate trimer
Amount is than being 1.8~3.4: 1.
6. fluorocarbon coating according to claim 1, which is characterized in that substrate wetting agents are polyether siloxane copolymer.
7. fluorocarbon coating according to claim 1, which is characterized in that modified grammite is to pass through 3- mercapto propyl trimethoxy
Silane-modified needle shape wollastonite powder.
8. fluorocarbon coating according to claim 7, which is characterized in that needle shape wollastonite powder partial size is 1250 mesh.
9. fluorocarbon coating according to claim 1-8, which is characterized in that isocyanate index in bicomponent system
It is 1.07~1.11.
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CN101735699A (en) * | 2009-12-11 | 2010-06-16 | 中国建筑材料科学研究总院 | Fluororesin modified acrylic acid durable heat-insulating anti-corrosive coating |
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CN103849293A (en) * | 2012-12-03 | 2014-06-11 | 上海开林造漆厂 | Anticorrosion thermal insulation heat reflecting paint for storage tank and preparation method thereof |
CN105419602A (en) * | 2015-12-18 | 2016-03-23 | 中国铁道科学研究院铁道建筑研究所 | Normal-temperature curable fluorocarbon coating for corrosion prevention and preparation method of fluorocarbon coating |
CN105670410A (en) * | 2014-11-21 | 2016-06-15 | 沈阳顺风新城建筑材料有限公司 | Fluorocarbon resin coating |
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US6174928B1 (en) * | 1998-05-14 | 2001-01-16 | Nippon Mektron, Limited | Process for producing fluorinated oligomer having COOH groups at both ends |
JP2004263121A (en) * | 2003-03-04 | 2004-09-24 | Asahi Glass Polyurethane Material Co Ltd | Two-pack top coating composition for waterproof material |
CN1513929A (en) * | 2003-04-18 | 2004-07-21 | 中国科学院金属研究所 | Nano-fluoro carbon aircraft paint and its preparation method |
CN1580154A (en) * | 2004-05-18 | 2005-02-16 | 大连振邦氟涂料股份有限公司 | Fluorocarbon coating and its preparing method |
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CN101735699A (en) * | 2009-12-11 | 2010-06-16 | 中国建筑材料科学研究总院 | Fluororesin modified acrylic acid durable heat-insulating anti-corrosive coating |
CN103849293A (en) * | 2012-12-03 | 2014-06-11 | 上海开林造漆厂 | Anticorrosion thermal insulation heat reflecting paint for storage tank and preparation method thereof |
CN103805043A (en) * | 2013-12-31 | 2014-05-21 | 杭州福斯特光伏材料股份有限公司 | Fluorocarbon two-component coating and application thereof |
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