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CN-121975376-A - Self-cleaning anti-corrosion weather-resistant finishing paint and preparation method and application thereof

CN121975376ACN 121975376 ACN121975376 ACN 121975376ACN-121975376-A

Abstract

The invention relates to the technical field of protective coating, and discloses self-cleaning anti-corrosion weather-resistant finishing paint, and a preparation method and application thereof. The finish paint comprises a component A and a component B (isocyanate curing agent), wherein the component A comprises a specific weight part of nano composite modified white color paste, fluorocarbon resin, extinction powder, solvent, adhesion promoter, light stabilizer and ultraviolet absorbent, and the nano composite modified white color paste comprises a specific weight part of acrylic resin, nano titanium dioxide, nano aluminum oxide, nano inert hydrophobic silica, super-hydrophobic aerogel, a modifier, a dispersing agent and an auxiliary agent. The finish paint is suitable for various base materials, is high in weather resistance, corrosion resistance, wet heat resistance and salt fog resistance, self-cleaning, wear-resistant, compact in paint film after solidification, high in compatibility with epoxy primer/intermediate paint and the like, controllable in cost, capable of being directly coated on various base materials, matched with epoxy primer/intermediate paint and the like, suitable for protecting wind power towers in offshore high-corrosion environments, and capable of meeting long-acting service requirements of offshore wind power equipment for 25 years.

Inventors

  • XU XIANGDONG
  • MAO QIANGQIANG
  • DONG JINGLIN
  • WANG ZHAN
  • SUN YUHAI
  • CHENG XUDONG

Assignees

  • 苏州中来光伏新材股份有限公司

Dates

Publication Date
20260505
Application Date
20260226

Claims (10)

  1. 1. The self-cleaning anti-corrosion weather-resistant finishing paint is characterized by comprising a component A and a component B; Wherein the component A comprises 55-70 parts by weight of nano composite modified white color paste, 20-30 parts by weight of fluorocarbon resin, 0-4 parts by weight of extinction powder, 10-15 parts by weight of solvent, 2.5-3.5 parts by weight of adhesion promoter, 0.6-1.0 parts by weight of light stabilizer and 0.8-1.5 parts by weight of ultraviolet absorber; The nano composite modified white color paste comprises, by weight, 35-45 parts of acrylic resin, 40-50 parts of nano titanium dioxide, 3-5 parts of nano aluminum oxide, 1-2 parts of nano inert hydrophobic gas silicon, 1-2 parts of super-hydrophobic aerogel, 2-3 parts of modifier, 3-5 parts of dispersing agent and 1-2.5 parts of auxiliary agent; wherein the component B is isocyanate curing agent.
  2. 2. The self-cleaning anti-corrosion weather-resistant finishing paint according to claim 1, wherein the fluorocarbon resin and the acrylic resin are base materials of the self-cleaning anti-corrosion weather-resistant finishing paint; The fluorocarbon resin has the viscosity of 1000-6000 mPa.s and the hydroxyl value of 40-100mgKOH/g, and is at least one of Tang-rich new material FC-5501, tang-rich new material FC-5510, east fluorine chemical ZHM-2 and east fluorine chemical ZHM-260; the viscosity of the acrylic resin is 4000-10000 mPa.s, the hydroxyl value is 50-100mgKOH/g, and the acrylic resin is at least one of chemical AC3433, chemical AC3420, ke Lisen KN5456F and three-basic chemical ADH 900.
  3. 3. The self-cleaning anti-corrosion weather-resistant finish paint according to claim 1, wherein the nano titanium dioxide, nano aluminum oxide, nano inert hydrophobic silica and super hydrophobic aerogel are pigments of the self-cleaning anti-corrosion weather-resistant finish paint; The nano titanium dioxide is nano rutile type titanium dioxide with the particle size of 100-300nm, the oil absorption less than or equal to 25g/100g and the TiO 2 content more than or equal to 93%, and is at least one of the family mu Ti-Pure-960, the stone source R-930 and the Dongjia SR-237; The particle size of the nano aluminum oxide is 20-50nm, the oil absorption is less than or equal to 55g/100g, the Al 2 O 3 content is more than or equal to 99.9%, and the nano aluminum oxide is at least one of nine-base CY-L30S, hui-Minia HG-30 and UZr HG-L12; The particle size of the nano inert hydrophobic silicon is 10-20nm, the oil absorption is 200-240g/100g, the SiO 2 content is more than or equal to 99.8%, and the nano inert hydrophobic silicon is at least one of Evonik AEROSIL R974, cabot CAB-O-SIL TS-720 and Hui HB-151; The particle size of the super-hydrophobic aerogel is 10-40 mu m, the oil absorption is less than or equal to 600g/100g, the water contact angle is more than or equal to 150 degrees, the specific surface area is 500-700m 2 /g, and the super-hydrophobic aerogel is at least one of Evonik AEROGEL IC3100, cabot ENOVA AEROGEL P and Keon KNF-AG 155; The particle size of the extinction powder is 2-6 mu m, the oil absorption value is 200-300g/100g, and the extinction powder is at least one of Graves ED2, graves C503, tosoh E-200A and three-liter chemical SD-600.
  4. 4. The self-cleaning anti-corrosion weather-resistant finishing paint according to claim 1, wherein the isocyanate curing agent is an aliphatic isocyanate curing agent, and at least one of isophorone diisocyanate, hexamethylene diisocyanate trimer, 4' -dicyclohexylmethane diisocyanate, methylcyclohexyl diisocyanate, trimethylhexamethylene diisocyanate and xylylene diisocyanate is selected.
  5. 5. The self-cleaning anti-corrosion weather-resistant finishing paint according to any one of claims 1 to 4, wherein the mass ratio of the component A to the component B is 100:5 to 10, the cyanogen-to-hydroxyl ratio of the self-cleaning anti-corrosion weather-resistant finishing paint is controlled to be 1.05 to 1.2, and the pigment-to-base ratio is controlled to be 0.9 to 1.2.
  6. 6. The self-cleaning anti-corrosion weather-resistant finishing paint according to any one of claims 1 to 4, wherein the modifier is gamma-aminopropyl triethoxysilane, and the gamma-aminopropyl triethoxysilane is at least one of Momentive A-1100, dow Z-6011 and domestic common brand KH 550; The auxiliary agent comprises 0.8-1.5 parts of wetting leveling agent and 0.5-0.8 part of defoaming agent, wherein the dispersing agent is at least one of Pick chemistry DISPRBYK-110, pick chemistry DISPYK-2008 and Yingzhuang TEGO Dispers 655, the wetting leveling agent is at least one of Pick chemistry BYK-333, haimas Levelol 837 and Huiyan HY-333, and the defoaming agent is at least one of Pick chemistry BYK-024, haimas Defom 6800 and Huiyan HY-066N.
  7. 7. The self-cleaning anti-corrosion weather resistant finish according to any one of claims 1 to 4, wherein the adhesion promoter is at least one of a silane type adhesion promoter, a phosphate type adhesion promoter, a chelate type adhesion promoter, a titanate type adhesion promoter, and a zirconate type adhesion promoter; The light stabilizer is a hindered amine light stabilizer; the ultraviolet absorber is benzotriazole ultraviolet absorber and/or triazine ultraviolet absorber; the solvent is at least one of propylene glycol methyl ether, propylene glycol methyl ether acetate, butyl acetate, ethylene glycol ethyl ether acetate and ethylene glycol butyl ether.
  8. 8. The method for preparing the self-cleaning anti-corrosion weather-resistant finishing paint as claimed in any one of claims 1 to 7, which is characterized by comprising the following preparation steps: S1, preparing nano composite modified white color paste: S11, uniformly stirring acrylic resin at the rotating speed of 400-600 r/min to obtain a resin base material; S12, adding a dispersing agent and a modifying agent into the resin base material, regulating the rotating speed to 800-1000 r/min, and stirring for 5-8 min to enable the dispersing agent and the modifying agent to be fully dissolved; S13, adding the nano titanium dioxide into the system for multiple times, keeping the rotation speed of 1200-1500 r/min at each feeding interval by taking the dry powder cluster-free system as a standard, stirring for 8-10 min after each feeding, and stirring for 25-30 min in total to finish primary dispersion; s14, sequentially adding nano aluminum oxide and nano inert hydrophobic silicon, wherein the interval between each addition is 3-5min, and the rotating speed is increased to 1500-1800 r/min and stirred for 15-20 min until the system has no obvious granular feel; s15, adding an auxiliary agent, and stirring for 8-10 min at the rotating speed of 600-800 r/min to uniformly disperse the auxiliary agent, so as to obtain a mixed material; S16, grinding the mixed material to obtain color paste with fineness less than or equal to 10 mu m; S17, cooling the ground color paste to room temperature, slowly scattering the super-hydrophobic aerogel into a color paste system for 2-3 times at the rotation speed of 300-500 r/min, taking the system dry powder free mass as a standard at each feeding interval, stirring for 5-8 min after each feeding, and stirring for 15-20 min in total until the aerogel is uniformly dispersed and no obvious agglomeration exists, thus obtaining the nano composite modified white color paste; S2, mixing the raw materials of the component A, and stirring for 20-30min at the rotating speed of 800-1000 r/min; And S3, mixing the component A and the component B, uniformly stirring, curing for 20-30min to obtain the coatable self-cleaning anti-corrosion weather-resistant finishing paint, and finishing the finishing within 4-8 h.
  9. 9. The application of the self-cleaning anti-corrosion weather-resistant finishing paint is characterized in that the self-cleaning anti-corrosion weather-resistant finishing paint disclosed in any one of claims 1-7 is applied to the surface of a marine wind power tower, and the base material of the marine wind power tower is at least one of carbon steel, iron castings, low alloy steel, stainless steel, galvanized plates, aluminum plates and galvanized magnesium aluminum base materials.
  10. 10. The use of a self-cleaning anti-corrosion weather-resistant finish according to claim 9, wherein an epoxy primer and/or an epoxy intermediate paint is applied to the surface of the substrate of the offshore wind tower prior to the application of the self-cleaning anti-corrosion weather-resistant finish.

Description

Self-cleaning anti-corrosion weather-resistant finishing paint and preparation method and application thereof Technical Field The invention relates to the technical field of protective coating, in particular to self-cleaning anti-corrosion weather-resistant finishing paint, and a preparation method and application thereof. Background With the expansion of wind power industry to severe environments such as deep sea, high altitude and the like, a wind power tower drum is used as a core bearing structure and faces more serious corrosion and aging tests. The offshore wind power tower is in a complex environment with high salt fog, high humidity, strong ultraviolet rays, alternating temperature and marine organism adhesion for a long time, and the tower base materials are various (such as galvanized magnesium aluminum base materials, Q345/Q355/Q420 low alloy steel materials, stainless steel, galvanized base materials and the like), so that the comprehensive performance of the protective coating is extremely required. The existing wind power tower protective coating has the technical bottlenecks that firstly, the suitability of a base material is poor, most of finishing paint is designed only aiming at a single base material, for example, the finishing paint adapting to low-alloy steel is easy to have the problems of insufficient adhesion, bubbling and falling off on the surface of galvanized magnesium aluminum steel, and the special galvanized base material finishing paint is difficult to meet the anti-corrosion requirement of the low-alloy steel, so that the multi-base material universality cannot be realized. Secondly, the weather resistance and corrosion resistance are insufficient, as shown in publication number CN120758135A, CN117683384A, the existing fluorocarbon finish paint or anticorrosive paint is easy to lose light, crack and peel after long-term salt fog, wet heat aging and other tests, for example, the wet heat aging test can only reach within 5000 hours, and the seawater soaking resistance test can only reach within 2400 hours, so that the long-term protection requirement of the offshore wind power over 25 years is difficult to be met. Thirdly, the existing finishing paint lacks a self-cleaning, heat-preserving and wear-resisting composite function, and has the defects of pollutant adhesion, mechanical wear acceleration and ageing of a coating, and insufficient cooperativity with common protection systems such as epoxy zinc-rich primer, epoxy iron-cloud intermediate paint, electrophoretic paint and the like, and is easy to peel between layers. Fourth, the cost and performance are unbalanced, the high-performance finish paint depends on high-proportion resin, so that the cost is high, and the protective performance and the service life of the low-cost product are sacrificed by simplifying the formula. Fifthly, the white finish paint is easy to yellow and lose light, the traditional titanium dioxide is poor in dispersibility, the density of a paint film is insufficient, and the ultraviolet aging resistance performance is fast. Therefore, developing a white fluorocarbon finish paint with multiple base materials being adaptive, high weather-resistant and corrosion-resistant, self-cleaning and wear-resistant, and a cured paint film being not compact due to excessive powder, strong in compatibility and controllable in cost becomes a technical problem to be solved in the wind power industry. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides self-cleaning anti-corrosion weather-resistant finishing paint, and a preparation method and application thereof. Based on the self-cleaning anticorrosive weather-resistant finishing paint, the invention discloses a self-cleaning anticorrosive weather-resistant finishing paint, which comprises a component A and a component B; Wherein the component A comprises 55-70 parts by weight of nano composite modified white color paste, 20-30 parts by weight of fluorocarbon resin, 0-4 parts by weight of extinction powder, 10-15 parts by weight of solvent, 2.5-3.5 parts by weight of adhesion promoter, 0.6-1.0 parts by weight of light stabilizer and 0.8-1.5 parts by weight of ultraviolet absorber; The nano composite modified white color paste comprises, by weight, 35-45 parts of acrylic resin, 40-50 parts of nano titanium dioxide, 3-5 parts of nano aluminum oxide, 1-2 parts of nano inert hydrophobic gas silicon, 1-2 parts of super-hydrophobic aerogel, 2-3 parts of modifier, 3-5 parts of dispersing agent and 1-2.5 parts of auxiliary agent; wherein the component B is isocyanate curing agent. Preferably, the fluorocarbon resin and the acrylic resin are base materials of self-cleaning anti-corrosion weather-resistant finishing paint; The fluorocarbon resin has the viscosity of 1000-6000 mPa.s and the hydroxyl value of 40-100mgKOH/g, and is at least one of Tang-rich new material FC-5501, tang-rich new material FC-5510, east fluorine chemica