CN109762449B - Highlight self-cleaning powder coating and preparation method thereof - Google Patents
Highlight self-cleaning powder coating and preparation method thereof Download PDFInfo
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- CN109762449B CN109762449B CN201811515509.4A CN201811515509A CN109762449B CN 109762449 B CN109762449 B CN 109762449B CN 201811515509 A CN201811515509 A CN 201811515509A CN 109762449 B CN109762449 B CN 109762449B
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Abstract
The invention discloses a high-gloss self-cleaning powder coating and a preparation method thereof. The adhesive comprises the following components in parts by mass: 30-50 parts of hydroxyl-terminated polyester resin, 3-15 parts of fluorocarbon resin, 15-75 parts of curing agent, 1-10 parts of modified nano silicon dioxide, 0-2 parts of pigment, 10-40 parts of filler and 0-15 parts of auxiliary agent. The powder coating disclosed by the invention has excellent hydrophobic property, good weather resistance and high gloss, adhesive force and impact resistance, and can be used for coating the surfaces of outdoor equipment, guardrails, billboards and the like and coating the surfaces of indoor equipment, smoke exhaust ventilators and the like.
Description
Technical Field
The invention relates to the field of powder coatings, in particular to a high-gloss self-cleaning powder coating and a preparation method thereof.
Background
With the increasing air pollution and dust pollution, the surface coatings of road guard rails, advertisement display boards and the like in cities are suffering from more and more serious erosion. These require constant cleaning to ensure the cleanliness of the coating surface and the cleanliness and tidiness of the entire city, which requires a great deal of labor and material. In addition, the surfaces of the existing household range hood, metal dining tables and the like are mostly sprayed by adopting powder coatings, the coating part adopts a polyurethane system, the cost is higher, one part of the coating part adopts common indoor powder coatings, oil stains are not easy to clean, frequent cleaning processes are needed, the waste of water resources is caused, and a lot of manpower is consumed. Therefore, there is a need to develop an easy-to-clean powder coating, which is applied to the surfaces of highway guardrails, bridge guardrails, advertising display boards, smoke exhaust ventilators, metal dining tables and the like, so that pollutants such as dust or oil stains are not easy to adhere to the surfaces, or the surfaces after adhering are easy to be washed or wiped clean by rainwater, rags and the like.
CN105482633A discloses an easy-to-clean powder coating of epoxy polyester system, wherein the weatherability of epoxy resin is poor, and calcium carbonate is easy to have the problems of pulverization and falling off when used outdoors, so the powder coating disclosed in the patent is not suitable for outdoor use; CN107760170A discloses a preparation method of self-cleaning powder coating, however, linear novolac epoxy resin is adopted, the weatherability of novolac epoxy resin is general, and the problems of pulverization, falling off and the like easily occur when the novolac epoxy resin is used outdoors, so that the self-cleaning function of the coating is lost; CN103194140A discloses a self-cleaning super-weather-resistant powder coating and a preparation method thereof, wherein anatase titanium dioxide is adopted, after receiving ultraviolet radiation, an electron-hole pair is formed, oxygen on the surface of titanium dioxide captures electrons to form negative oxygen ions, the negative oxygen ions have strong oxidizing ability and can decompose carboxyl-terminated polyester resin and partial inorganic matters, in addition, the patent is that a carboxyl-terminated polyester system and a fluorocarbon resin system are mixed for use, and then sprayed and coated on the surface of a workpiece, because the sprayed coating is a mixture, in the reaction process, because the carboxyl-terminated polyester system has fast reaction time and the fluorocarbon system has slow reaction and forms cross-linking and solidification in the coating, the part cannot float down to the coating, and the part of the carboxyl-terminated polyester system is still on the upper part and is easy to be subjected to ultraviolet radiation and oxidation, the fluorocarbon resin system has extremely excellent weather resistance, and CN103194140a does not use pigment and filler with excellent weather resistance in the polyester system. Therefore, the short plates exist in part of materials of the cured coating formed by mixing the two system powders, so that the service life of the coating in practical application is influenced, the coating is pulverized, and the self-cleaning function is reduced or lost.
Therefore, it is necessary to provide a comprehensive powder coating with outstanding weather resistance and self-cleaning property, and simultaneously has the properties of high gloss, high adhesion, strong impact resistance and the like so as to meet the market demand.
Disclosure of Invention
The invention aims to provide a high-gloss self-cleaning powder coating and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
one purpose of the invention is to provide a high-gloss self-cleaning powder coating, which comprises the following components in parts by mass: 30-50 parts of hydroxyl-terminated polyester resin, 3-15 parts of fluorocarbon resin, 15-75 parts of curing agent, 1-10 parts of modified nano silicon dioxide, 0-2 parts of pigment, 10-40 parts of filler and 0-15 parts of auxiliary agent.
Preferably, the above components are: 35-45 parts of hydroxyl-terminated polyester resin, 5-12.5 parts of fluorocarbon resin, 20-70 parts of curing agent, 3-5 parts of modified nano silicon dioxide, 0.5-1.5 parts of pigment, 25-35 parts of filler and 1-15 parts of auxiliary agent.
Preferably, the ratio of the hydroxyl-terminated polyester resin to the fluorocarbon resin in parts by mass is 8: 1-4: 1.
preferably, the hydroxyl-terminated polyester resin has a hydroxyl value of 100 to 300mgKOH/g and a melt viscosity of 3000 to 8500mPa.s at 200 ℃.
Preferably, the hydroxyl-terminated polyester resin has a hydroxyl value of 100 to 300mgKOH/g and a melt viscosity of 3000 to 4000mPa.s at 200 ℃.
Preferably, the hydroxyl-terminated polyester resin is at least one selected from 4874-0 or 2818.
Preferably, the fluorocarbon resin is FEVE tetrafluoroethylene resin or PVDF resin mainly composed of a copolymer of tetrafluoroethylene and vinyl ether.
Preferably, the fluorocarbon resin is selected from the group consisting of FL 710.
Preferably, the modified nano-silica is nano-silica modified by amino silane coupling agent.
Preferably, the modified nano-silica is prepared by the following preparation method:
A) isolating oxygen, and dispersing the nano silicon dioxide in the solution to obtain a dispersion liquid a;
B) and (3) isolating oxygen, adding perfluorooctyl-triethoxysilane into the dispersion liquid a, performing reflux reaction, cooling, and adding an aminosilane coupling agent for coupling reaction to obtain the aminosilane coupling agent modified nano-silica.
Preferably, the mass ratio of the nano-silica to the perfluorooctyl-triethoxysilane to the aminosilane coupling agent is 1: (0.01-0.08): (0.01-0.05).
More preferably, the mass ratio of the nano-silica, the perfluorooctyl-triethoxysilane, and the aminosilane coupling agent is 1: (0.03-0.05): (0.02-0.04).
Preferably, the nanosilica in step a) is dispersed in a weakly acidic ethanol solution.
Preferably, the temperature of the reflux reaction in the step B) is 75-85 ℃.
Preferably, the time of the reflux reaction in the step B) is 0.5 to 6 hours, and more preferably 2 to 3 hours.
Preferably, the temperature of the coupling reaction in the step B) is 100-120 ℃.
Preferably, the time of the coupling reaction in the step B) is 0.5-6 h, and more preferably 1-3 h.
Preferably, the method further comprises the steps of distilling under reduced pressure and drying after the reaction in the step B) is finished.
Preferably, the curing agent is selected from isocyanates.
Preferably, the filler is at least one selected from rutile titanium dioxide, barium sulfate, quartz powder and mica powder.
Preferably, the upper pigment is selected from super weatherable pigments.
Preferably, the auxiliary agent is at least one selected from leveling agents, antioxidants, degassing agents, ultraviolet absorbers and air permeability agents.
Preferably, the leveling agent is at least one selected from the group consisting of butyl cellulose, hydroxymethyl cellulose, GLP588, GLP505, GLP599, PV88, 486CFL, and 570 FL.
Preferably, the antioxidant is at least one selected from the group consisting of antioxidant 168, antioxidant 3114, antioxidant DLTDP, antioxidant 1010 and antioxidant 1076.
Preferably, the degassing agent is at least one selected from benzoin, fine wax and polyether.
Preferably, the ultraviolet absorber is at least one selected from Tinuvin 144, Tinuvin 783 and UV531 of basf.
Preferably, the air-permeable agent is at least one selected from polyether, polyvinyl butyral and BYK 966.
The invention also aims to provide a preparation method of the powder coating, which comprises the following preparation steps:
1) weighing the components according to the proportion, mixing and tabletting to obtain a mixed material;
2) and (3) putting the mixed material into a crusher, putting the nano silicon dioxide into a silicon adding device, simultaneously starting the crusher and the silicon adding device, and sieving to obtain the powder coating.
Preferably, the particle size of the powder coating is 30-45 μm.
More preferably, the particle size of the powder coating is 35 to 40 μm.
Preferably, the mass ratio of the nano silicon dioxide to the mixed material is (0.001-0.005): 1.
the invention has the beneficial effects that:
the hydroxyl-terminated polyester resin, the fluorocarbon resin and the modified nano-silicon dioxide form chemical bonds, meanwhile, due to the high hydroxyl value of the polyester resin, the cured polyester resin has high crosslinking density and compact coating structure, and the cured coating has an amido bond (-NH-CO) -, hydrogen atoms on the amido bond and nitrogen atoms on other amido bonds form hydrogen bonds, the hydrogen atoms of the amido bond and fluorine atoms of fluorocarbon resin form hydrogen bonds, and the formation of the hydrogen bonds in the coating enhances the binding capacity of different functional groups in the coating, so that the whole coating forms a more compact whole, therefore, the powder coating has excellent hydrophobic property, meanwhile, the coating has the characteristics of good weather resistance, high gloss, strong adhesive force and strong impact resistance, and can be used for coating the surfaces of outdoor equipment, guardrails, billboards and the like and the surfaces of indoor equipment, smoke exhaust ventilators and the like.
Detailed Description
The present invention will be described in further detail with reference to examples. It will also be understood that the following examples are included merely for purposes of further illustrating the invention and are not to be construed as limiting the scope of the invention, as the invention extends to insubstantial modifications and adaptations of the invention following in the light of the principles set forth herein. The specific process parameters and the like of the following examples are also only one example of suitable ranges, and the skilled person can make a selection within the suitable ranges through the description herein, and are not limited to the specific data of the following examples.
The invention will now be described in more detail with reference to examples and comparative examples, the powder coating compositions of which are given in Table 1 below:
TABLE 1
The preparation method of the high-gloss self-cleaning powder coating of the embodiments 1-3 and the comparative examples 1-2 is as follows:
1) weighing the components according to the table 1, putting the components into a mixing cylinder for premixing for 3min, mixing for 3min again after 2min intervals, melting, mixing uniformly and extruding the premixed components by using a double-screw extruder, and tabletting to obtain a mixed material;
2) cooling the mixed material obtained in the step 1) to room temperature, placing the cooled mixed material in a crusher, adding nano silicon dioxide into a silicon adding device, starting the crusher and the silicon adding device to crush the mixed material, and then passing through a rotary sieve to obtain the powder coating with the average particle size of 35-40 mu m.
And (3) performance testing:
the powder coatings prepared in the above examples 1 to 3 and comparative examples 1 to 2 were applied to a heat-sensitive substrate by a high-voltage electrostatic method or a fluidized bed method, the curing temperature was 200 to 210 ℃, the curing time was 15 to 20min (curing by an electric oven or a heat exchange oven), the coating thickness was 50 to 80 μm, and then the following performance tests were performed, and the results are shown in table 2:
1) gloss was tested according to GB/T9754;
2) the adhesion is tested according to GB/T9286;
3) the solvent resistance is tested according to GB/T1768-79;
4) the water contact angle was tested according to GB/T30693-;
5) impact resistance was tested according to GB/T1732;
6) neutral salt spray was tested according to GB/T1771-2007;
7) the xenon lamp exposure test was performed according to GB/T1865-2009;
8) lipstick and marker test: a lipstick or a marker pen was coated on the substrate coated with the powder coating of the present invention, and a paper towel rub-off test was performed after standing for 72 hours.
TABLE 2
As can be seen from Table 2: when the use amount of the fluorocarbon resin is continuously increased, the ratio of the high hydroxyl value polyester resin to the fluorocarbon resin is less than 4: 1, the crosslinking density of the whole coating is reduced, the gloss of the coating is influenced, and meanwhile, the size of a water contact angle is also influenced, and the self-cleaning effect of the coating is influenced; and when the ratio of the high hydroxyl value polyester resin to the fluorocarbon resin exceeds 8: 1 hour, namely when the consumption of the fluorocarbon resin is low, the weather resistance of the coating is poor, and the self-cleaning effect of the coating is influenced after the coating is placed outdoors for too long time.
Claims (7)
1. A high-gloss self-cleaning powder coating is characterized in that: the adhesive comprises the following components in parts by mass: 30-50 parts of hydroxyl-terminated polyester resin, 3-15 parts of fluorocarbon resin, 15-75 parts of curing agent, 1-10 parts of modified nano silicon dioxide, 0-2 parts of pigment, 10-40 parts of filler and 0-15 parts of auxiliary agent;
the ratio of the hydroxyl-terminated polyester resin to the fluorocarbon resin in parts by mass is 8: 1-4: 1;
the modified nano silicon dioxide is nano silicon dioxide modified by amino silane coupling agent;
the hydroxyl value of the hydroxyl-terminated polyester resin is 100-300 mgKOH/g, and the melt viscosity at 200 ℃ is 3000-8500 mPa & s;
the curing agent is selected from isocyanates.
2. The powder coating of claim 1, wherein: the components are as follows: 35-45 parts of hydroxyl-terminated polyester resin, 5-12.5 parts of fluorocarbon resin, 20-70 parts of curing agent, 3-5 parts of modified nano silicon dioxide, 0.5-1.5 parts of pigment, 25-35 parts of filler and 1-15 parts of auxiliary agent.
3. The powder coating according to any one of claims 1 to 2, characterized in that: the fluorocarbon resin is FEVE tetrafluoroethylene resin or PVDF resin which takes tetrafluoroethylene and vinyl ether copolymer as a main body.
4. The powder coating according to any one of claims 1 to 2, characterized in that: the filler is selected from at least one of rutile titanium dioxide, barium sulfate, quartz powder and mica powder; the pigment is selected from super weather-resistant pigments; the auxiliary agent is at least one of a leveling agent, an antioxidant, a degassing agent and an ultraviolet absorbent.
5. The method for preparing a powder coating according to any one of claims 1 to 4, wherein: the method comprises the following steps:
1) weighing the components in proportion, mixing and tabletting to obtain a mixed material;
2) and (3) placing the mixed material in a crusher, placing the nano silicon dioxide in a silicon adding device, simultaneously starting the crusher and the silicon adding device, and sieving to obtain the powder coating.
6. The method of claim 5, wherein: the particle size of the powder coating is 30-45 mu m.
7. The method of claim 5, wherein: the mass ratio of the nano silicon dioxide to the mixed material is (0.001-0.005): 1.
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| CN110669420A (en) * | 2019-10-10 | 2020-01-10 | 湖南连心科技有限公司 | Anti-doodling polyurethane powder coating and preparation method and application thereof |
| CN112391110A (en) * | 2020-11-16 | 2021-02-23 | 安徽博泰装饰材料有限公司 | Easy-to-clean powder coating and production process thereof |
| CN114836110A (en) * | 2022-04-30 | 2022-08-02 | 江苏国强镀锌实业有限公司 | Nano modified hot-dip galvanized polyester coating and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409044A (en) * | 2013-07-08 | 2013-11-27 | 中国科学院宁波材料技术与工程研究所 | Powder coating with high pencil hardness |
| CN105440902A (en) * | 2015-12-02 | 2016-03-30 | 铜陵市肆得科技有限责任公司 | Hydrophobicity-enhanced powder coating for corrosion protection of pump valves |
| CN106752443A (en) * | 2016-12-12 | 2017-05-31 | 衡阳山泰化工有限公司 | A kind of high-weatherability powdery paints |
| CN107974183A (en) * | 2017-11-09 | 2018-05-01 | 广州擎天材料科技有限公司 | A kind of polyurethane-fluorine carbon composite powder coatings suitable for damp and hot marine climate environment and preparation method thereof |
-
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- 2018-12-12 CN CN201811515509.4A patent/CN109762449B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409044A (en) * | 2013-07-08 | 2013-11-27 | 中国科学院宁波材料技术与工程研究所 | Powder coating with high pencil hardness |
| CN105440902A (en) * | 2015-12-02 | 2016-03-30 | 铜陵市肆得科技有限责任公司 | Hydrophobicity-enhanced powder coating for corrosion protection of pump valves |
| CN106752443A (en) * | 2016-12-12 | 2017-05-31 | 衡阳山泰化工有限公司 | A kind of high-weatherability powdery paints |
| CN107974183A (en) * | 2017-11-09 | 2018-05-01 | 广州擎天材料科技有限公司 | A kind of polyurethane-fluorine carbon composite powder coatings suitable for damp and hot marine climate environment and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 活性纳米微粒改性聚酯树脂自清洁粉末涂料;陆东方等;《第四届中国国际腐蚀控制大会论文集》;20110318;第333-336页 * |
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