CN111040527A - Heat-reflecting super-hydrophobic PVDF coating and preparation method thereof - Google Patents
Heat-reflecting super-hydrophobic PVDF coating and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of coating processing, and particularly relates to a heat-reflecting super-hydrophobic PVDF coating and a preparation method thereof. Firstly, modifying a plurality of nano particles, and endowing a large number of functionalized functional groups on the surfaces of the nano particles by the surface grafting effect of a plurality of silane coupling agents; the nano particles are used as a super-hydrophobic and heat-reflecting introduction source, the PVDF resin and other various resins are used as film forming materials, high-speed dispersion is adopted, various coating additives are added, the materials are uniformly mixed according to a certain component proportion, and a high-performance PVDF coating is obtained on the surface of a base material after coating. The coating has the advantages that the heat reflectivity is more than 90%, the water contact angle is more than 150 degrees, and the coating has excellent performance.
Description
Technical Field
The invention belongs to the technical field of coating processing, and particularly relates to a heat-reflecting super-hydrophobic PVDF coating and a preparation method thereof.
Background
The PVDF coating has good corrosion resistance, durability and weather resistance, is widely applied in many fields, and is often applied to some special environments due to a certain self-cleaning function. The realization of the super-hydrophobic function depends on the hydrophobic interface, when water drops roll on the hydrophobic interface, the attached pollutants on the solid surface can be taken away, the characteristic enables the self-cleaning water tank to have great application in the self-cleaning field, the time and the period for manually cleaning the pollutants are saved, and the self-cleaning water tank has great prospect in practical application.
The super-hydrophobic material has excellent performance which is always a hotspot of research in the field of coatings, in addition, the heat reflecting material can reflect more than 90% of light in sunlight, can reduce energy consumption in places needing to be cooled, and simultaneously prevent the base material from generating photochemical hazard, for example, the super-hydrophobic material can play roles in reducing temperature and consumption, saving energy and reducing emission in oil pipelines, oil storage tanks and places with weather inflammation, and has very wide application prospect. Not only greatly reduces manpower and material resources, but also can ensure economic benefit.
International patent WO2007012026, filed by the university of fuzhou, describes a method for preparing a super-hydrophobic coating; a PVDF coating material with self-cleaning performance and its preparation method, the coating is mainly 10 wt% -20 wt% organic polymer, 70 wt% -80 wt% solvent and 8 wt% -15 wt% nano particle (nano TiO)2And SiO2The nano-microsphere can be coated on the surface of PVC or PE, has better self-cleaning capability, and mainly uses nano-particles to obtain required performance in the patent. However, this method has the disadvantages of poor dispersing effect and easy agglomeration.
Disclosure of Invention
In order to overcome the defects of high cost, complex preparation process and the like of the conventional hydrophobic coatingThe invention provides a preparation method of a heat-reflecting super-hydrophobic PVDF coating, which adopts novel silane coupling agent modified hydrophobic nano particles (SiO)2Graphene oxide GO, graphene oxide and nano SiO2One or more of the composite particles) can realize the heat reflection performance, and simultaneously, the introduced hydrophobic groups can have better compatibility with a PVDF coating system, prevent agglomeration and further enhance the self-cleaning function of the coating.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of a heat-reflecting super-hydrophobic PVDF coating comprises the following steps:
(1) mixing nano SiO2Or the graphene oxide is modified respectively or together to be used as a reaction raw material; weighing the raw material components respectively according to the parts by weight;
(2) respectively dissolving acrylic resin in partial solvents, and completely dissolving the acrylic resin under high-speed dispersion to prepare an acrylic resin solution, wherein the mass concentration is controlled to be 30-50%; under a cold water bath, adding a part of acrylic resin solution into a solvent, after completely dissolving the acrylic resin solution, slowly adding PVDF resin into the solvent under the dispersion action of a dispersion machine, after completely adding the PVDF resin, adjusting the frequency to 2500-;
(3) adding the rest acrylic resin solution into the solvent, uniformly mixing, and adding nano TiO2And modified graphene oxide and nano SiO2Composite particles, adding modified nano SiO2Or modifying graphene oxide, and dispersing at high speed to obtain slurry 2;
(4) and (3) adding the PVDF slurry 1 prepared in the step (3), the slurry 2 prepared in the step (2), amino resin and residual acrylic resin into the residual solvent, then adding a flatting agent, a wetting dispersant and a defoaming agent, stirring at a high speed, then rolling, and baking at 200-300 ℃ for 50-90 seconds.
Preferably, the raw material comprises nano TiO22.0-16.0 parts; modified nano SiO22.0-16.0 parts; 0-1 of modified graphene oxide.0 part of (C); modified graphene oxide and nano SiO21.0-15.0 parts of composite particles; 20.0-30.0 parts of PVDF resin, 5.0-15 parts of acrylic resin, 0.5-2.0 parts of amino resin, 21.2-28.2 parts of solvent, 0.1-1.5 parts of flatting agent, 0.1-1.5 parts of defoaming agent and 0.1-1.5 parts of wetting dispersant; modified nano SiO2Modified graphite oxide, modified graphene oxide and nano SiO2The composite particles are obtained by modifying with a silane coupling agent.
Preferably, the silane coupling agent modification comprises the steps of:
(1.1) mixing the nano SiO2Fully activating the graphene oxide in a vacuum drying oven at 100-500 ℃ for 3-12 hours;
(1.2) activating the nano SiO2Or GO is uniformly dispersed in the modified solvent respectively or together;
(1.3) adding one or more of silane coupling agents HMDS, TMCS and KH550 into the nano system dispersed in the step (1.2) under the condition of mechanical stirring at 50-150 ℃, and fully refluxing and reacting for 2-5 hours under the stirring condition;
(1.4) dispersing the obtained product by using ultrasonic for 20-30 minutes, then carrying out vacuum reduced pressure suction filtration by using a sand-stone funnel, and washing by using a modified solvent after suction filtration;
(1.5) drying the mixture in a vacuum drying oven at the temperature of between 50 and 150 ℃ for 5 to 12 hours;
(1.6) putting the dried product into an agate mortar and grinding the dried product into powder to obtain the modified nano SiO2Modified graphite oxide, modified graphene oxide and nano SiO2Composite particles.
Preferably, said step (1.3) is subjected to hydrolysis before adding KH 550.
Preferably, the modifying solvent is one or more than two of DMAC (N, N-dimethylacetamide), xylene, trimethylbenzene and N-butanol.
Preferably, the solvent is one or more than two of isophorone, toluene, xylene, trimethylbenzene, dimethyl phthalate, ethylene glycol butyl ether and propylene glycol methyl ether acetate.
Preferably, the acrylic resin is a thermosetting acrylic resin and/or a thermoplastic acrylic resin.
Preferably, the nano-sized TiO2And SiO2Particle diameter of 25-30nm, and nanometer TiO2Is in the rutile type; the wetting dispersant is BYK-163; the leveling agent is BYK-361; the defoaming agent is defom 6800.
In addition, the invention also provides the heat reflection super-hydrophobic PVDF coating prepared by the preparation method.
Compared with the prior art, the invention has the following beneficial effects:
(1) the coating disclosed by the invention is simple in preparation process and high in feasibility;
(2) compared with the existing PVDF coating, the invention utilizes TiO2The photocatalysis performance of the coating can obtain heat reflection, the lotus leaf effect and part of nepenthes effect can be obtained on the surface of the coating by utilizing the nano microspheres grafted with functional groups, the reflectivity of the coating to sunlight can reach more than 90 percent, the contact angle can reach more than 145 degrees, and the coating has excellent corrosion resistance, heat reflection, super-hydrophobicity and self-cleaning performance;
(3) the addition of a proper amount of inorganic nano particles can form filling in the interior of the tree branch, and the contact area of the coating and the base material is increased, so that the hardness and the adhesive force are increased; various graphene materials are innovatively added, and GO and SiO are used as the graphene materials2The composite particles are firstly added into a system, the graphene material is a perfect material, the performance of the graphene material can be greatly improved after the graphene material is compounded with a high polymer material, but the dispersibility of the graphene material is poor, the graphene material is coupled with the nano particles, and the problem of the dispersibility of the graphene material is solved by utilizing the good performance of the graphene material;
(4) the cost is controllable, and the market prospect is wide.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 shows that KH550 hydrolyzed in the embodiment of the present invention participates in GO and nano SiO2Composite reactorAnd (6) processing the graph.
Detailed Description
In order to make the purpose and technical solution of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. The experimental methods described in the following examples are all conventional methods unless otherwise specified; the specific techniques or conditions are not indicated in the examples, and the techniques or conditions are described in the literature in the field or according to the product specification; the reagents and materials are commercially available, unless otherwise specified.
The formulation and preparation of the components of the coating according to the invention are described in detail below by way of examples 1 to 12. The amounts of the components in the examples are in parts by weight.
The wetting dispersant and the leveling agent are purchased from Bick chemical company of Germany and have the product numbers of BYK-163 and BYK-361 respectively.
Defoamer aid was purchased from the hai-name siemens deum, product number defom 6800.
The silane coupling agent HMDS is hexamethyldisilazane, CAS: 999-97-3 from Aladdin; TMCS is trimethylchlorosilane, CAS: 75-77-4, available from Aladdin, Inc.; KH550 is gamma-aminopropyltriethoxysilane, CAS:919-30-2, available from Michael corporation.
The solvent in the following examples is one or more of isophorone, toluene, xylene, trimethylbenzene, dimethyl phthalate, ethylene glycol monobutyl ether, and propylene glycol methyl ether acetate, and the total part is 50.
The modifying solvent is one or more than two of DMAC (N, N-dimethylacetamide), dimethylbenzene, trimethylbenzene and N-butyl alcohol.
Nano-sized TiO 22And nano-scale SiO2Particle diameter of 25-30nm, and nanometer TiO2Is in rutile type.
Modified SiO2Modified GO, modified GO and SiO2The preparation method of the composite particles comprises the following steps:
(1) mixing nano SiO2Placing GO in a vacuum drying oven for full activation for 3-12 hours at 100-500 ℃;
(2) the activated SiO2And GO is uniformly dispersed in the modified solvent respectively or together;
(3) adding one or more of silane coupling agents HMDS, TMCS and KH550 into the nano system dispersed in the step (2) under the condition of mechanical stirring at 50-150 ℃, and fully refluxing and reacting for 2-5 hours under the stirring condition;
(4) dispersing the obtained product by using ultrasonic for 20-30 minutes, then carrying out vacuum reduced pressure suction filtration by using a sand-stone funnel, and washing by using a modified solvent after suction filtration;
(5) drying in a vacuum drying oven at 50-150 deg.C for 5-12 hr;
(6) putting the dried product into an agate mortar and grinding the dried product into powder to respectively obtain modified SiO2Modified GO, modified GO and SiO2Composite particles.
Modified SiO2And HMDS and activated SiO in the preparation of modified GO2Or the dosage ratio of GO is 1: 10 TMCS and SiO after activation2Or the dosage ratio of GO is 1: 10, KH550 modified GO and SiO2KH550, GO and SiO in the process of composite particles2The dosage ratio of 1.75: 1: 10.
modified SiO2And during the preparation process of the modified GO, the nano SiO210.0 parts and/or 1.0 part of GO, 1.75 parts of KH550, 0.74 part of distilled water, 4.53 parts of absolute ethyl alcohol and 250 parts of n-butyl alcohol.
The silane coupling agent KH550 is subjected to hydrolysis reaction before being added, so that the reaction effect is improved.
KH550 is hydrolyzed to prepare the product with a ratio of KH550 to absolute ethyl alcohol to distilled water of 20:72: 8.
The KH550 hydrolysis reaction equation is as follows:
because the reaction speed of the hydrolysis reaction is too fast, flocculation is easy to occur, which is not beneficial to the subsequent reaction, in order to control the reaction speed, distilled water and absolute ethyl alcohol are used for preparing hydrolysate with the water-alcohol ratio of 1:9, because the ethyl alcohol is generated in the reaction, the ethanol is added to be not beneficial to the generation of silanol according to the reaction balance principle, thereby achieving the purpose of controlling the reaction, the hydrolysis is carried out while the subsequent experiment is carried out, which is beneficial to preventing the flocculation and the aggregation of nano silicon dioxide.
Hydrolyzed KH550 and nano SiO2the-OH (hydroxyl) reaction mechanism at the particle surface is as follows:
-OH+NH2-(CH2)3-Si(OH)3→-O-Si(CH2)3-NH2+H2O
the-OH (hydroxyl) reaction mechanism of the hydrolyzed KH550 and GO surfaces is as follows:
in this reaction, the hydroxyl group on the surface reacts with KH550 after hydrolysis, and it can be seen that the hydroxyl group is finally substituted by an amino group, i.e., it means that the hydrophilic group is substituted by the hydrophobic group.
The hydrolyzed KH550 participates in GO and nano SiO2The mechanism of the recombination reaction is shown in FIG. 1. In the reaction, KH550 is between GO and nano SiO2The middle part of the structure plays the roles of grafting and bridge, and two ions can be compounded through different group reactions.
The coating is generally applied to aluminum metal surfaces or plastic surfaces, and the construction method generally adopts roller coating as a main method. When coating, firstly, the metal surface or the plastic surface is subjected to alkali washing, water washing and chromizing treatment, then a layer of epoxy primer is coated, and finally the coating is coated by the roller.
The adhesion and impact strength of the coating are respectively tested by national standard GB/9286-.
Examples 1 to 3
The proportions of the components in examples 1 to 3 are shown in Table 1.
TABLE 1 ingredient preparation Table
The following procedure was carried out at room temperature without specific indication:
(1) weighing the components in the table according to the parts by weight;
(2) respectively dissolving acrylic resin in a solvent, wherein the ratio of toluene to xylene to butyl cellosolve is 29.5:29.5:1, and completely dissolving the acrylic resin under high-speed dispersion to obtain an acrylic resin solution, wherein the mass fraction of the acrylic resin is 40%. At 10 ℃ of a cold water bath, 20g of acrylic resin solution is added into isophorone and butyl glycol ether (the mass ratio is 25: 1) to be completely dissolved, PVDF resin is slowly added into the solution at the frequency of a small high-speed dispersion machine of 700-1000 rpm, the frequency is adjusted to 2500-3000 rpm after the PVDF resin is completely added, PVDF slurry 1 is prepared after 30min, and the fineness is measured by a scraper fineness meter to ensure that the fineness is below 25.
(3) Adding 2g of acrylic resin solution into isophorone, trimethylbenzene and dimethyl phthalate in a ratio of 25:18:3, and then adding nano TiO2Modified SiO2And modified GO and nano SiO2The composite particles are dispersed at high speed to prepare slurry 2.
(4) PVDF slurry 1 and 2, amino resin (2.5g) and acrylic resin solution (3g) were added to isophorone, xylene, trimethylbenzene, dimethyl phthalate, butyl cellosolve (ratio 25:18:3:2:2), BYK-163, BYK-361, defom6800, stirred at high speed for 15min, roll-coated, and baked at 278 ℃ for 80 sec.
Examples 4 to 6
The proportions of the components in examples 4 to 6 are shown in Table 2, the preparation methods are shown in examples 1 to 3, and the silane coupling agents used for the modification are different.
Table 2 ingredient preparation table
Examples 7 to 9
The proportions of the components in examples 7 to 9 are shown in Table 3, and the production methods are shown in examples 1 to 3, except that the silane coupling agent used for the modification was different.
TABLE 3 ingredient preparation table
Examples 10 to 12
Examples 10-12 the ratios of the components are shown in table 4 and the methods of preparation are shown in examples 1-3, except that no modified GO was used in examples 10-12.
TABLE 4 ingredient preparation table
Product performance detection and inspection:
unmodified SiO2And GO nanoparticles are layered in DMAC (N, N-dimethylacetamide), dimethylbenzene, trimethylbenzene and N-butyl alcohol, while the nanoparticles modified by silane coupling agents HMDS, TMCS and KH550 are still not layered after standing in the above solvents for 24 hours, so that the nanoparticles have excellent dispersibility, because the silane coupling agents replace hydroxyl on the surfaces of the nanoparticles, and hydrophobic and oleophilic groups are gathered on the surfaces of the nanoparticles.
The samples obtained in examples 1 to 12 above were uniformly applied to the surface of an aluminum sheet, and the test results obtained are shown in Table 5.
TABLE 5 coating Performance test
By comparing the experimental data of the examples of Table 5, it can be seen visually that the examples are due to the added TiO2In the same amount, the difference in thermal reflectance is not great; examples 2, 8 contact angles of up to 148And 147 degrees prove that the HMDS and TMCS play the best hydrophobic effect in the modification process. The modified GO and hybrid particles can also play a hydrophobic role in the system by the contrast effect between the addition and non-addition of modified particles.
Nano TiO 22The rutile type has the advantage of ultraviolet radiation resistance, and has extremely high light reflection and heat reflection performance.
Modified nano SiO2Can be highly dispersed in resin, and the coating has excellent hydrophobic property. Modified GO or modified GO and nano SiO2The composite particles can be well dispersed in resin and can be used as a perfect material, the graphene can be dispersed in a network structure of the resin, the hardness and the impact resistance of the resin are greatly improved, the graphene can play a good filling role between the resin and a matrix, the adhesive force of the graphene is improved, and meanwhile, the surface of the graphene is also substituted by hydrophobic groups, so that the hydrophobicity of the resin is more prominent. GO and nano SiO2The hydrophobic group obtained by modification can avoid the generated particles from agglomerating, which can influence the dispersibility of the particles, so that the diameters of the particles are increased. The vacuum drying avoids the influence of air on the sample and the introduction of other impurities, and reduces the reaction conditions.
The modified nano-particles are obtained by modifying through a silane coupling agent, and because a large number of hydroxyl groups exist on the surfaces of the nano-particles which are not modified, the nano-particles show certain hydrophilicity, and the dispersibility of the nano-particles in an organic solvent is greatly influenced.
In other aspects, the PVDF resin has excellent adhesion and corrosion resistance, excellent weather resistance and certain hydrophobic property, and avoids introducing excessive impurities to influence the performance of the coating by selecting the PVDF resin, so that the reaction condition is further reduced, the cost is reduced, and the requirements of national standards on corrosion resistance, salt mist resistance, impact strength, adhesion and the like can be met.
It should be understood that the above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents may be made in the technical solutions described in the foregoing embodiments, or some technical features may be substituted. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A preparation method of a heat reflection super-hydrophobic PVDF coating is characterized by comprising the following steps:
(1) mixing nano SiO2Or the graphene oxide is modified respectively or together to be used as a reaction raw material; weighing the raw material components respectively according to the parts by weight;
(2) respectively dissolving acrylic resin in partial solvents, and completely dissolving the acrylic resin under high-speed dispersion to prepare an acrylic resin solution, wherein the mass concentration is controlled to be 30-50%; under a cold water bath, adding a part of acrylic resin solution into a solvent, after completely dissolving the acrylic resin solution, slowly adding PVDF resin into the solvent under the dispersion action of a dispersion machine, after completely adding the PVDF resin, adjusting the frequency to 2500-;
(3) adding the rest acrylic resin solution into the solvent, uniformly mixing, and adding nano TiO2And modified graphene oxide and nano SiO2Composite particles, adding modified nano SiO2And modified graphene oxide, and dispersing at high speed to obtain slurry 2;
(4) and (3) adding the PVDF slurry 1 prepared in the step (3), the slurry 2 prepared in the step (2), amino resin and residual acrylic resin into the residual solvent, then adding a flatting agent, a wetting dispersant and a defoaming agent, stirring at a high speed, then rolling, and baking at 200-300 ℃ for 50-90 seconds.
2. The method for preparing the heat-reflective super-hydrophobic PVDF coating according to claim 1, wherein the raw material comprises nano TiO22.0-16.0 parts; modified nano SiO22.0-16.0 parts; modified oxidized stone0-1.0 part of graphene; modified graphene oxide and nano SiO21.0-15.0 parts of composite particles; 20.0-30.0 parts of PVDF resin, 5.0-15 parts of acrylic resin, 0.5-2.0 parts of amino resin, 21.2-28.2 parts of solvent, 0.1-1.5 parts of flatting agent, 0.1-1.5 parts of defoaming agent and 0.1-1.5 parts of wetting dispersant; modified nano SiO2Modified graphite oxide, modified graphene oxide and nano SiO2The composite particles are obtained by modifying with a silane coupling agent.
3. The preparation method of the heat-reflecting super-hydrophobic PVDF coating material as claimed in claim 2, wherein the silane coupling agent modification comprises the following steps:
(1.1) mixing the nano SiO2Fully activating the graphene oxide in a vacuum drying oven at 100-500 ℃ for 3-12 hours;
(1.2) activating the nano SiO2Or the graphene oxides are uniformly dispersed in the modified solvent respectively or together;
(1.3) adding one or more of silane coupling agents HMDS, TMCS and KH550 into the nano system dispersed in the step (1.2) under the condition of mechanical stirring at 50-150 ℃, and fully refluxing and reacting for 2-5 hours under the stirring condition;
(1.4) dispersing the obtained product by using ultrasonic for 20-30 minutes, then carrying out vacuum reduced pressure suction filtration by using a sand-stone funnel, and washing by using a modified solvent after suction filtration;
(1.5) drying the mixture in a vacuum drying oven at the temperature of between 50 and 150 ℃ for 5 to 12 hours;
(1.6) putting the dried product into an agate mortar and grinding the dried product into powder to obtain the modified nano SiO2Modified graphite oxide, modified graphene oxide and nano SiO2Composite particles.
4. The method for preparing a heat-reflective superhydrophobic PVDF coating of claim 3, wherein the hydrolysis is performed on the heat-reflective superhydrophobic PVDF coating before KH550 is added in the step (1.3).
5. The method for preparing the heat-reflective super-hydrophobic PVDF coating according to claim 3, wherein the modifying solvent is one or more than two of N, N-dimethylacetamide, xylene, trimethylbenzene and N-butanol.
6. The method for preparing the heat-reflecting super-hydrophobic PVDF coating according to claim 1, wherein the solvent is one or more than two of isophorone, toluene, xylene, trimethylbenzene, dimethyl phthalate, ethylene glycol monobutyl ether and propylene glycol methyl ether acetate.
7. The method for preparing the heat-reflecting super-hydrophobic PVDF coating according to claim 1, wherein the acrylic resin is a thermosetting acrylic resin and/or a thermoplastic acrylic resin.
8. The method for preparing the heat-reflective superhydrophobic PVDF coating of claim 1, wherein the nano TiO is2And SiO2Particle diameter of 25-30nm, and nanometer TiO2Is in the rutile type; the wetting dispersant is Pico chemical BYK-163; the flatting agent is Pico chemical BYK-361; the defoamer was hamming chemical defom 6800.
9. A heat-reflective super-hydrophobic PVDF coating prepared by the preparation method of any one of claims 1-8.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113352522A (en) * | 2021-05-26 | 2021-09-07 | 厦门台盾防水科技有限公司 | Production method of high polymer modified asphalt self-adhesive coiled material |
| CN113845681A (en) * | 2020-06-10 | 2021-12-28 | 海信（山东）空调有限公司 | Water collector and air conditioner |
| CN114621640A (en) * | 2022-04-06 | 2022-06-14 | 深圳前海石墨烯产业有限公司 | Graphene heat dissipation coating and preparation method thereof |
| CN116102928A (en) * | 2023-02-15 | 2023-05-12 | 三峡大学 | Preparation method of radiation refrigeration coating with superhydrophobic performance |
| CN116790141A (en) * | 2023-06-26 | 2023-09-22 | 杭州老板电器股份有限公司 | Heat reflection coating, preparation method thereof and pot holder |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101177515A (en) * | 2006-11-09 | 2008-05-14 | 中国化工建设总公司常州涂料化工研究院 | Thermoset acrylic resin for paint and high-temperature firing type polyvinylidene fluoride (PVDF) coiled material paint containing the same |
| CN104449107A (en) * | 2014-11-24 | 2015-03-25 | 无锡市虎皇漆业有限公司 | High temperature baking type PVDF coating and preparation method thereof |
| CN105925073A (en) * | 2016-06-27 | 2016-09-07 | 山东科技大学 | Anti-corrosion super-hydrophobic heat reflecting paint and preparation method thereof |
| CN107964294A (en) * | 2017-12-11 | 2018-04-27 | 大连理工大学 | A kind of PFA coatings containing micro-nano compounded mix and preparation method thereof |
| CN109486345A (en) * | 2018-10-22 | 2019-03-19 | 泉州臻美智能科技有限公司 | A kind of nanometer modified epoxy resin floor coatings and preparation method thereof |
| CN109836919A (en) * | 2017-09-29 | 2019-06-04 | 天津工业大学 | A kind of functional graphene oxide corrosion-inhibiting coating and its preparation process |
| CN110205023A (en) * | 2019-06-21 | 2019-09-06 | 重庆市科学技术研究院 | With hydrophobic, antiseptic property composite Nano coating material and its preparation method and application |
| CN110240814A (en) * | 2019-06-18 | 2019-09-17 | 山东大学 | A kind of amphiphilic graphene oxide and preparation method thereof and the application in water paint |
-
2019
- 2019-12-31 CN CN201911414634.0A patent/CN111040527A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101177515A (en) * | 2006-11-09 | 2008-05-14 | 中国化工建设总公司常州涂料化工研究院 | Thermoset acrylic resin for paint and high-temperature firing type polyvinylidene fluoride (PVDF) coiled material paint containing the same |
| CN104449107A (en) * | 2014-11-24 | 2015-03-25 | 无锡市虎皇漆业有限公司 | High temperature baking type PVDF coating and preparation method thereof |
| CN105925073A (en) * | 2016-06-27 | 2016-09-07 | 山东科技大学 | Anti-corrosion super-hydrophobic heat reflecting paint and preparation method thereof |
| CN109836919A (en) * | 2017-09-29 | 2019-06-04 | 天津工业大学 | A kind of functional graphene oxide corrosion-inhibiting coating and its preparation process |
| CN107964294A (en) * | 2017-12-11 | 2018-04-27 | 大连理工大学 | A kind of PFA coatings containing micro-nano compounded mix and preparation method thereof |
| CN109486345A (en) * | 2018-10-22 | 2019-03-19 | 泉州臻美智能科技有限公司 | A kind of nanometer modified epoxy resin floor coatings and preparation method thereof |
| CN110240814A (en) * | 2019-06-18 | 2019-09-17 | 山东大学 | A kind of amphiphilic graphene oxide and preparation method thereof and the application in water paint |
| CN110205023A (en) * | 2019-06-21 | 2019-09-06 | 重庆市科学技术研究院 | With hydrophobic, antiseptic property composite Nano coating material and its preparation method and application |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845681A (en) * | 2020-06-10 | 2021-12-28 | 海信（山东）空调有限公司 | Water collector and air conditioner |
| CN113845681B (en) * | 2020-06-10 | 2024-01-26 | 海信空调有限公司 | Water pan and air conditioner |
| CN113352522A (en) * | 2021-05-26 | 2021-09-07 | 厦门台盾防水科技有限公司 | Production method of high polymer modified asphalt self-adhesive coiled material |
| CN113352522B (en) * | 2021-05-26 | 2023-06-09 | 厦门台盾防水科技有限公司 | Production method of high polymer modified asphalt self-adhesive coiled material |
| CN114621640A (en) * | 2022-04-06 | 2022-06-14 | 深圳前海石墨烯产业有限公司 | Graphene heat dissipation coating and preparation method thereof |
| CN116102928A (en) * | 2023-02-15 | 2023-05-12 | 三峡大学 | Preparation method of radiation refrigeration coating with superhydrophobic performance |
| CN116102928B (en) * | 2023-02-15 | 2024-03-12 | 三峡大学 | Preparation method of radiation refrigeration coating with superhydrophobic performance |
| CN116790141A (en) * | 2023-06-26 | 2023-09-22 | 杭州老板电器股份有限公司 | Heat reflection coating, preparation method thereof and pot holder |
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