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CN-121975422-A - Fast-curing wave-absorbing repair coating and preparation method and application thereof

CN121975422ACN 121975422 ACN121975422 ACN 121975422ACN-121975422-A

Abstract

The invention belongs to the technical field of stealth materials, and relates to a wave-absorbing repair coating capable of being rapidly cured, a preparation method and application thereof. The wave-absorbing repairing coating prepared by the method has the advantages of low curing temperature and short curing time, can greatly shorten the external field curing time, provides material guarantee for quick repairing equipment, has good tensile bonding strength, ensures the structural strength stability of the wave-absorbing repairing coating under the action of external force load and vibration force, has good broadband wave-absorbing capability through radar reflectivity test, has good heat resistance through heat resistance test, and ensures the performance stability of the wave-absorbing repairing coating under the action of thermal stress.

Inventors

  • ZHAI YING
  • ZHENG YONGXIANG
  • LI SIYI
  • SUN LIRONG
  • NIU YINGJIE
  • HUANG ZHIBIN
  • ZHE SHENGYANG

Assignees

  • 陕西华秦科技实业股份有限公司

Dates

Publication Date
20260505
Application Date
20260123

Claims (10)

  1. 1. The wave-absorbing repair coating capable of being rapidly cured is characterized by comprising, by mass, 30% -60% of an absorbent, 17% -30% of a photosensitive resin, 3% -15% of a photoinitiator, 2% -10% of an active amine auxiliary initiator, 5% -10% of an inorganic filler, 3% -10% of an acrylic monomer, 1% -8% of a leveling agent, 0.5% -3% of a defoaming agent and 1% -5% of a dispersing agent.
  2. 2. The wave-absorbing repair coating according to claim 1, wherein the absorber is a compound mixture of FeSiCr powder and flattened carbonyl iron powder according to the mass ratio of (25-37): (6-20).
  3. 3. The wave-absorbing repair coating according to claim 1, wherein the photosensitive resin is a compound mixture of polyurethane acrylic resin and epoxy acrylic resin according to the mass ratio of (5~3) to (3-1).
  4. 4. The wave-absorbing repair coating of claim 1 wherein the photoinitiator is a free radical initiator comprising at least one of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-propanone, 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-isopropylthioxanthone, phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 2, 4-diethylthiazolone and benzophenone.
  5. 5. The wave-absorbing repair coating of claim 1, wherein the reactive amine co-initiator is an acrylated reactive amine co-initiator.
  6. 6. The wave-absorbing repair coating of claim 1, wherein the inorganic filler comprises at least one of fumed silica and montmorillonite.
  7. 7. The wave-absorbing repair coating of claim 1, wherein the acrylic monomer comprises at least one of trimethylolpropane triacrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, pentaerythritol tetraacrylate, and pentaerythritol triacrylate.
  8. 8. The wave-absorbing repair coating of claim 1, wherein the leveling agent comprises at least one of an organosilicon leveling agent and an acrylic leveling agent; The defoaming agent comprises at least one of polyether modified organic silicon defoaming agent, polyether defoaming agent and polycarboxylate defoaming agent; The dispersing agent comprises at least one of stearic acid, polyethylene glycol and polyoxyethylene ether.
  9. 9. The preparation method of the rapidly curable wave-absorbing repair coating according to any one of claims 1 to 8, which is characterized by comprising the following steps: According to the mass percentage of each component, firstly sequentially placing photosensitive resin, acrylic monomers and inorganic filler into a container, and uniformly mixing to obtain slurry A; And adding an absorbent, a photoinitiator, an active amine auxiliary initiator, a leveling agent, a defoaming agent and a dispersing agent into the slurry A, and uniformly mixing to obtain the fast-curing wave-absorbing repair coating.
  10. 10. The application of the wave-absorbing repair coating capable of being rapidly cured based on any one of claims 1-8 or the wave-absorbing repair coating prepared based on the preparation method of claim 9 is characterized in that the wave-absorbing repair coating is coated on a position to be repaired of surface damage of aviation or aerospace equipment to form a wave-absorbing repair coating for radar stealth.

Description

Fast-curing wave-absorbing repair coating and preparation method and application thereof Technical Field The invention belongs to the technical field of stealth materials, and particularly relates to a wave-absorbing repair coating capable of being rapidly cured, a preparation method and application thereof. Background The radar stealth coating is widely applied to various weaponry, and effectively improves the burst prevention performance and the survivability of the weaponry. However, in the service period of the weapon equipment, any radar stealth coating is affected and acted by environmental factors in the storage, transportation and use processes, so that the changes of physical and chemical properties such as color change, chalking, layering, cracking, adhesive force reduction and the like of the coating and the fluctuation of the stealth performance of the coating are caused. Meanwhile, mechanical damages such as scratch and abrasion of the stealth coating can be caused in the battlefield and the usual training process, the mechanical damages can lead to the falling of the radar stealth coating, and the electromagnetic wave reflection is serious at the falling part of the coating, so that the stealth performance of weapon equipment is seriously affected. Therefore, in the actual use process, targeted protection and repair measures must be adopted for the radar coating to ensure that the weapon equipment has the best stealth effect. The existing repairing measures are to coat the radar wave-absorbing coating of the mature epoxy resin system on the market on the damaged area, and repair the damaged area after curing. However, the existing coating is slow in drying and curing speed, generally needs about 24 hours, is more difficult to cure under the low-temperature condition (generally, the curing temperature is more than 150 ℃), and is easy to sag in the construction process, so that the requirements of battlefield emergency construction are difficult to meet. Therefore, research on a radar wave-absorbing coating capable of rapidly preparing a wave-absorbing coating is needed, so that material guarantee is provided for rapidly repairing weapon equipment. In view of this, the present invention has been made. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a wave-absorbing repair coating capable of being rapidly cured, and a preparation method and application thereof, so as to solve the problems that the repair coating in the prior art is slow in curing time and difficult to meet the requirements of battlefield emergency construction. In order to achieve the above purpose, the present invention provides the following technical solutions: On the one hand, the invention provides a fast-curing wave-absorbing repair coating, which comprises, by mass, 30% -60% of an absorbent, 17% -30% of a photosensitive resin, 3% -15% of a photoinitiator, 2% -10% of an active amine auxiliary initiator, 5% -10% of an inorganic filler, 3% -10% of an acrylic monomer, 1% -8% of a leveling agent, 0.5% -3% of a defoaming agent and 1% -5% of a dispersing agent. Specifically, the absorbent is a compound mixture of FeSiCr powder and flattened carbonyl iron powder according to the mass ratio of (25-37) to (6-20). Specifically, the photosensitive resin is a compound mixture of polyurethane acrylic resin and epoxy acrylic resin according to the mass ratio of (5~3) to (3-1). Specifically, the photoinitiator is a free radical initiator, and the free radical initiator comprises at least one of 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-acetone, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-acetone, 2-isopropylthioxanthone, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 2, 4-diethyl thiazolone and benzophenone. Specifically, the active amine co-initiator is an acrylated active amine co-initiator. Specifically, the inorganic filler includes at least one of fumed silica and montmorillonite. Specifically, the acrylic monomer comprises at least one of trimethylolpropane triacrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, pentaerythritol tetraacrylate and pentaerythritol triacrylate. Specifically, the leveling agent comprises at least one of an organosilicon leveling agent and an acrylic leveling agent; The defoaming agent comprises at least one of polyether modified organic silicon defoaming agent, polyether defoaming agent and polycarboxylate defoaming agent; The dispersing agent comprises at least one of stearic acid, polyethylene glycol and polyoxyethylene ether. In another aspect, the present invention provides a method for preparing the rapidly curable wave-absorbing repair coating as described above, the method comprising: Sequentially placing photosensitive resin, acrylic monomers and inorganic filler into a container according to the mass percentage of each component,