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CN-122011876-A - Anticorrosive paint composition, anticorrosive paint, preparation method of anticorrosive paint composition and coating

CN122011876ACN 122011876 ACN122011876 ACN 122011876ACN-122011876-A

Abstract

The invention provides an anticorrosive paint composition, an anticorrosive paint, a preparation method and a coating thereof, wherein the anticorrosive paint composition comprises thermosetting resin, a curing agent and modified waste wind power blade powder, the addition amount of the modified waste wind power blade powder is 10% -30% based on the total mass of the thermosetting resin and the curing agent, and the anticorrosive paint is obtained by mixing the anticorrosive paint composition, a solvent and an auxiliary agent. The method comprises the steps of (1) adding a solvent, a dispersing agent, a defoaming agent and thermosetting resin into a stirring kettle, dispersing to form a mixed solution Y-1, (2) adding modified waste wind power blade powder into the mixed solution Y-1 to form a mixed solution Y-2, and (3) adding a curing agent and a rheological additive into the mixed solution Y-2 to obtain the anti-corrosion coating. The invention provides an anticorrosive coating formed by the anticorrosive coating. According to the anti-corrosion coating composition, the wind power blade is subjected to alkali treatment and silane treatment, so that the compatibility of wind power blade powder and resin is improved, and the corrosiveness of a coating is improved.

Inventors

  • WU DETAO
  • YANG SHIXUAN
  • MA YUFEI
  • WU FUMEI
  • DONG YANG

Assignees

  • 北京低碳清洁能源研究院

Dates

Publication Date
20260512
Application Date
20260112

Claims (10)

  1. 1. An anticorrosive coating composition, which is characterized by comprising thermosetting resin, a curing agent and modified waste wind power blade powder; The addition amount of the modified waste wind power blade powder is 10% -30%, preferably 20% -30% by taking the total mass of the thermosetting resin and the curing agent as the weight.
  2. 2. The anticorrosive coating composition according to claim 1, wherein the mass ratio of the modified waste wind power blade powder to the thermosetting resin is (0.1 to 0.5): 1.
  3. 3. Anticorrosive coating composition according to claim 2, characterized in that the thermosetting resin is selected from polyurethane, epoxy or fluorocarbon resins, preferably epoxy resins; the curing agent is selected from an organic amine curing agent or an isocyanate curing agent.
  4. 4. The anticorrosive coating composition according to any one of claims 1 to 3, wherein the modified waste wind power blade powder is prepared by the following steps: (1) Grinding the fiber reinforced composite material in the recovered wind power blade to obtain waste wind power blade powder, and preferably grinding to 20-50 microns; (2) Adding alkali liquor into the waste wind power blade powder prepared in the step (1), stirring under heating, washing with water to be neutral, filtering, and drying to constant weight; (3) Mixing a silane coupling agent, ethanol and deionized water according to the mass ratio of (3-6) to (3-6), and adjusting the pH value to 4-5 to prepare a silane coupling agent hydrolysate; and (3) adding the product obtained in the step (2) into the hydrolysate of the silane coupling agent according to the weight ratio of 1 (10-20), reacting for 2-4 hours at the temperature of 60-80 ℃, washing with water to be neutral, filtering, and drying to constant weight to obtain the modified waste wind power blade powder.
  5. 5. The anticorrosive coating composition according to claim 4, wherein in the step (2), the waste wind power blade powder is mixed with the alkali liquor and then stirred and reacted for 6-12 hours at 80-90 ℃; Preferably, the solid-to-liquid ratio of the waste wind power blade powder to the alkali liquor is (1-10): (1-40) g/ml; more preferably, the mass concentration of the alkali liquor is 10% -20%.
  6. 6. An anticorrosive coating composition according to claim 5 wherein in step (3) the silane coupling agent is selected from gamma-glycidoxypropyl trimethoxysilane or perfluorodecyl triethoxysilane.
  7. 7. An anticorrosive paint, characterized in that the anticorrosive paint is obtained by uniformly mixing each component of the anticorrosive paint composition according to any one of claims 1-6 with a solvent and other auxiliary agents; wherein the solvent is selected from one or more of ethanol, ethyl acetate, butyl acetate or n-butanol; the other auxiliary agents are selected from dispersing agents, defoamers and rheology auxiliary agents; Preferably, the consumption of the dispersing agent is 5% -10% of the addition amount of the modified waste wind power blade powder in the anticorrosive coating composition by mass.
  8. 8. Anticorrosive coating according to claim 7, characterized in that the dispersant is selected from sterically hindered dispersants, preferably BYK9076; The defoamer is selected from an organosilicon defoamer BYK-066N or BYK-141, and is preferably BYK-141; the rheology aid is selected from BYK-410, BYK GARMITE 1958, preferably BYK-410.
  9. 9. A method of preparing the anticorrosive paint of claim 7 or 8, comprising the steps of: (1) Adding a solvent, a dispersing agent, a defoaming agent and thermosetting resin into a stirring kettle, and uniformly dissolving by adopting a high-speed dispersing machine to form a mixed solution Y-1; (2) Adding modified waste wind power blade powder into the mixed solution Y-1, and stirring at a high speed until the powder is uniform to form mixed solution Y-2; (3) Adding a curing agent and a rheological additive into the mixed solution Y-2, and uniformly mixing to obtain an anticorrosive paint; wherein, each component in the steps (1) - (3) meets the dosage proportion defined in claim 7.
  10. 10. A corrosion-resistant coating, characterized in that it is formed from the corrosion-resistant coating according to any one of claims 7 or 8.

Description

Anticorrosive paint composition, anticorrosive paint, preparation method of anticorrosive paint composition and coating Technical Field The invention relates to the technical field of paint, in particular to an anticorrosive paint composition, an anticorrosive paint, a preparation method thereof and a coating. Background The wind power blade material is a composite material, mainly comprises thermosetting resin and fibers, and forms insoluble and infusible solids after curing and crosslinking. The thermosetting resin is epoxy resin, unsaturated polyester resin, polyurethane resin, etc. and the fiber is glass fiber and carbon fiber. When wind power blade materials become solid waste once the life cycle is finished, the solid waste can be treated only by landfill, incineration and other modes, which are gradually forbidden by law, so that better solutions are needed to solve the problem of a large number of existing waste wind power blades. Grinding wind power blades into powder and utilizing the same is one solution for wind power blade recovery. The waste wind power blades are crushed to the granularity less than or equal to 80 meshes to prepare white carbon black in the patent CN115465867B, and the waste wind power blades are ground into glass fiber reinforced plastic (resin) powder with the granularity of 0.15mm in the patent CN117341250A to be used as a plastic filling material. The preparation of the white carbon black by the CN115465867B requires a high-temperature environment, and glass fibers adopted by most wind power blades are alkali-resistant glass fibers and are not easy to thoroughly dissolve into silica sol, so that the preparation of the white carbon black is difficult. The glass fiber reinforced plastic powder obtained in the patent CN117341250A is thermosetting resin powder, and the phenomenon of incompatibility exists when the glass fiber reinforced plastic powder is added into thermoplastic plastics, so that the plastic performance is deteriorated, and the using effect is poor. The wind power blade powder is thermosetting resin, and the wind power blade powder is added into the anti-corrosion coating formed by the thermosetting resin, so that the anti-corrosion performance of the coating can be improved, and the interface performance is good after the surface treatment, thereby being a mode for high-value utilization of the wind power blade powder. Investigation of existing documents and patents shows that CN 118580741A discloses an anticorrosive paint and a preparation method thereof, wherein the wind power blade powder is used as a thermosetting coating additive, (1) the wind power blade powder and an organic solvent are subjected to modification reaction, solid phase components are separated, the solid phase components are sequentially dried and photodegradation to obtain a component A, (2) a base resin, a conductive filler, an inorganic filler and a hydrochloric acid retarder are subjected to first mixing and filtration, the obtained filtrate is a component B, (3) the base resin, a polyamide curing agent, a titanate coupling agent and a silicone adhesive are subjected to second mixing, the obtained mixed material is filtered, the obtained filtrate is a component C, and (4) the component A, the component B and the component C are subjected to third mixing, wherein the base resin contains coal-based resin, epoxy resin and petroleum resin. However, the scheme needs to be used after photodegradation treatment is carried out on the blade powder, the degradation condition is not easy to control, and a plurality of fillers are needed to be matched for use. Disclosure of Invention In order to solve the problems, the invention aims to provide an anticorrosive coating composition and an anticorrosive coating composed of recovered wind power blade powder, and a coating thereof, wherein the anticorrosive coating with high resistance can be formed by treating wind power blades and adding the anticorrosive coating into thermosetting resin for full dispersion, the preparation process is simple, the functionality of the wind power blade powder can be fully exerted, and the added value is high. In order to achieve the purpose of the invention, the invention adopts the following technical scheme: the invention provides an anticorrosive coating composition in a first aspect, wherein the anticorrosive coating composition comprises thermosetting resin, a curing agent and modified waste wind power blade powder; The addition amount of the modified waste wind power blade powder is 10% -30%, preferably 20% -30% by taking the total mass of the thermosetting resin and the curing agent as the weight. In some embodiments, the mass ratio of the modified waste wind power blade powder to the thermosetting resin is (0.1-0.5): 1. In some embodiments, the thermosetting resin is selected from polyurethane resin, epoxy resin or fluorocarbon resin, preferably epoxy resin; the curing agent is selected from an organic amine