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CN-122011855-A - Antibacterial coating for vehicle chassis and preparation method thereof

CN122011855ACN 122011855 ACN122011855 ACN 122011855ACN-122011855-A

Abstract

The invention relates to the technical field of protective coatings, in particular to an antibacterial coating for a vehicle chassis and a preparation method thereof, wherein the antibacterial coating for the vehicle chassis is prepared from the following components, by weight, 30-50 parts of acrylic emulsion, 10-20 parts of a composite additive, 6-10 parts of nano calcium carbonate, 2-5 parts of silicon carbide, 2-4 parts of carbon black, 1-2 parts of bentonite, 2-3 parts of nano zinc oxide, 2-3 parts of dipropylene glycol butyl ether, 3-5 parts of tetraphenyl bisphenol-A-diphosphate, 0.6-1.2 parts of zinc strontium phosphate, 0.8-1.5 parts of iron oxide yellow, 0.2-0.5 part of 2-methyl-4-isothiazolin-3-one, 0.5-1 part of a leveling agent, 0.6-1.2 parts of a wetting agent, 0.5-1 part of a defoaming agent, 0.3-0.8 part of a dispersing agent and 10-20 parts of water.

Inventors

  • LIU BEIBEI
  • HUANG JIANJUN
  • CHEN FENGCHENG
  • WU JIAYING

Assignees

  • 厦门景碧实业有限公司

Dates

Publication Date
20260512
Application Date
20260210

Claims (10)

  1. 1. The antibacterial paint for the vehicle chassis is characterized by comprising, by weight, 30-50 parts of acrylic emulsion, 10-20 parts of a composite additive, 6-10 parts of nano calcium carbonate, 2-5 parts of silicon carbide, 2-4 parts of carbon black, 1-2 parts of bentonite, 2-3 parts of nano zinc oxide, 2-3 parts of dipropylene glycol butyl ether, 3-5 parts of tetraphenyl bisphenol-A-diphosphate, 0.6-1.2 parts of zinc strontium phosphate, 0.8-1.5 parts of iron oxide yellow, 0.2-0.5 part of 2-methyl-4-isothiazolin-3-one, 0.5-1 part of a leveling agent, 0.6-1.2 parts of a wetting agent, 0.5-1 part of an antifoaming agent, 0.3-0.8 part of a dispersing agent and 10-20 parts of water.
  2. 2. The antibacterial paint for the vehicle chassis according to claim 1, wherein the preparation method of the composite auxiliary agent is as follows: Dissolving ‌ -2-butane phosphonate-1, 2, 4-tricarboxylic acid in deionized water to prepare an acid solution with the concentration of 3-5wt%, adding 30-40% of deacetylated chitin of ‌ -butane phosphonate-1, 2, 4-tricarboxylic acid, mixing and stirring to fully dissolve the deacetylated chitin, heating the obtained mixed components to 80-85 ℃, dripping formaldehyde with the volume of 1-2% of the acid solution, refluxing for 1-2h, then carrying out heat preservation reaction for 5-8h, after the reaction is finished, carrying out rotary evaporation on a reaction product to remove unreacted formaldehyde and water, and carrying out vacuum drying and grinding treatment on the obtained concentrate to prepare the modifier; Dripping EDC with the mass of 0.3-0.4 times of the modifier into 5-8wt% of modifier aqueous solution, stirring for 10-20min, adding NHS with the same molar quantity as the EDC, reacting for 1-2h, adding aminated spherical base material with the mass of 0.5-1 times of the modifier and polyhexamethylene biguanide with the mass of 0.2-0.5 times of the modifier, uniformly dispersing, reacting for 5-8h at room temperature, and sequentially centrifuging, washing and vacuum drying the reaction solution to obtain the modified aqueous emulsion.
  3. 3. The antibacterial paint for the vehicle chassis according to claim 2, wherein the preparation method of the aminated spherical base material is characterized in that the nano spherical base material is immersed in an ethanol water solution with the mass ratio of between 85 and 90 percent, gamma-aminopropyl trimethoxysilane with the mass of between 20 and 30 percent of the ethanol water solution is added, the reaction is carried out for 3 to 5 hours at the temperature of between 60 and 70 ℃, and then the solid-liquid separation, the washing and the drying treatment are carried out on the reaction liquid in sequence, so that the antibacterial paint is obtained.
  4. 4. The antibacterial paint for a vehicle chassis according to claim 3, wherein the spherical substrate is prepared by mixing 0.5-0.8g/mL of aqueous solution of zirconium oxychloride with 0.2-0.3g/mL of aqueous solution of cerium nitrate in a volume ratio of 1-2:1, sequentially adding modified porous polymethyl methacrylate microspheres with the mass 2-3 times that of zirconium oxychloride and absolute ethyl alcohol with the same volume as that of the aqueous solution of zirconium oxychloride, performing ultrasonic dispersion until no obvious massive solid particles exist, reacting for 10-20 hours at 90-120 ℃, filtering the reaction solution, calcining a filter cake at 500-600 ℃ for 4-6 hours, and naturally cooling to room temperature to obtain the antibacterial paint.
  5. 5. The antibacterial coating for the vehicle chassis according to claim 4, wherein the preparation method of the modified porous polymethyl methacrylate microsphere is characterized in that 2-5g of porous polymethyl methacrylate microsphere is ultrasonically dispersed in 100-200mL of deionized water, 5-8g of ethylenediamine is added, the mixture is reacted for 10-15 hours at 75-85 ℃ and then is subjected to suction filtration, the mixture is washed with ethanol for 3-4 times after being washed to be neutral, and then the mixture is dried in vacuum at 40-60 ℃.
  6. 6. The antibacterial paint for the vehicle chassis according to claim 1, wherein the leveling agent is any one of Pick BYK-378, pasteur EFKAFL 3772 and Pick BYK-331.
  7. 7. The antimicrobial coating for a vehicle chassis according to claim 1, wherein the wetting agent is at least one of a Di-high TEGO-270 wetting agent and a Di-high TEGO-265 wetting agent.
  8. 8. The antibacterial paint for the vehicle chassis according to claim 1, wherein the antifoaming agent is any one of Digao TEGO-8030, dow Corning AFE-3168 and Pick BYK-A530.
  9. 9. The antibacterial coating for the vehicle chassis according to claim 1, wherein the dispersing agent is any one of Pick BYK-190, ceramic 731A and Pick BYK-192.
  10. 10. A method for preparing the antibacterial paint for the vehicle chassis according to any one of claims 1 to 9, which is characterized by comprising the steps of weighing all components according to formula amount, adding the components into mixing equipment for mixing and stirring, sanding the obtained mixed slurry with a sand mill until the fineness is lower than 10 mu m after the components are uniformly stirred, and then filtering and filling the obtained product.

Description

Antibacterial coating for vehicle chassis and preparation method thereof Technical Field The invention relates to the technical field of protective coatings, in particular to an antibacterial coating for a vehicle chassis and a preparation method thereof. Background The chassis of the vehicle is used as a key part of the direct contact between the automobile and the road surface, and is exposed to a complex and severe environment for a long time, and the chassis of the vehicle bears multiple challenges such as broken stone impact, muddy water splashing, chemical corrosion, microorganism (such as bacteria and mold) breeding caused by moisture and dirt accumulation. Microorganism breeding can not only accelerate the biological corrosion of chassis metal parts, affect the safety and service life of vehicles, but also generate peculiar smell. Therefore, effective multifunctional protection of the vehicle chassis is of great importance. Although the traditional chassis coating (such as asphalt-based coating and epoxy-based coating) can provide certain antirust and sound-insulating effects, the comprehensive performance of the traditional chassis coating is difficult to meet the increasingly-improved requirements. In particular, it is insufficient in long-term abrasion resistance and impact resistance, and is easily broken by scraping with sand and stone, resulting in failure in protection. Meanwhile, the traditional coating generally lacks active and long-acting antibacterial functions, and cannot inhibit the growth of microorganisms and the formation of biological films in a wet environment of the chassis. Currently, there are some functional coatings in the market to which antibacterial agents (such as inorganic silver ions, organic quaternary ammonium salts, etc.) are added. However, these techniques often face the bottleneck that firstly, the compatibility of the antibacterial component with the coating matrix is poor, the antibacterial component is easy to migrate and run off, the antibacterial effect is not durable and the physical properties of the coating are possibly affected, and secondly, the wear resistance is relatively poor, and the requirements on multiple properties of the coating such as antibacterial, wear resistance and corrosion resistance are difficult to meet. Therefore, the invention provides an antibacterial coating for a vehicle chassis and a preparation method thereof, so as to solve the technical problems. Disclosure of Invention The invention provides an antibacterial coating for a vehicle chassis and a preparation method thereof, and the prepared antibacterial coating not only has excellent antibacterial performance, but also has excellent wear resistance, so that the wear resistance of the vehicle chassis is effectively improved, and the probability of scratch is reduced. Meanwhile, the method can resist the attack of microorganisms in a humid environment, remarkably improve the durability and reliability of the protection of the chassis of the vehicle, and prolong the service life of the chassis to a certain extent. In order to achieve the above purpose, the present invention provides the following technical solutions: the antibacterial paint for the chassis of the vehicle is prepared from the following components, by weight, 30-50 parts of acrylic emulsion, 10-20 parts of a composite auxiliary agent, 6-10 parts of nano calcium carbonate, 2-5 parts of silicon carbide, 2-4 parts of carbon black, 1-2 parts of bentonite, 2-3 parts of nano zinc oxide, 2-3 parts of dipropylene glycol butyl ether, 3-5 parts of tetraphenyl bisphenol-A-diphosphate, 0.6-1.2 parts of zinc strontium phosphate, 0.8-1.5 parts of iron oxide yellow, 0.2-0.5 part of 2-methyl-4-isothiazolin-3-one, 0.5-1 part of a leveling agent, 0.6-1.2 parts of a wetting agent, 0.5-1 part of an antifoaming agent, 0.3-0.8 part of a dispersing agent and 10-20 parts of water. Further, the preparation method of the composite additive comprises the following steps: Dissolving ‌ -2-butane phosphonate-1, 2, 4-tricarboxylic acid in deionized water to prepare an acid solution with the concentration of 3-5wt%, adding 30-40% of deacetylated chitin of ‌ -butane phosphonate-1, 2, 4-tricarboxylic acid, mixing and stirring to fully dissolve the deacetylated chitin, heating the obtained mixed components to 80-85 ℃, dripping formaldehyde with the volume of 1-2% of the acid solution, refluxing for 1-2h, then carrying out heat preservation reaction for 5-8h, after the reaction is finished, carrying out rotary evaporation on a reaction product to remove unreacted formaldehyde and water, and carrying out vacuum drying and grinding treatment on the obtained concentrate to prepare the modifier; Dripping EDC with the mass of 0.3-0.4 times of the modifier into 5-8wt% of modifier aqueous solution, stirring for 10-20min, adding NHS with the same molar quantity as the EDC, reacting for 1-2h, adding aminated spherical base material with the mass of 0.5-1 time