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CN-122011900-A - Bismuth oxychloride-based door handle antistatic coating and preparation method thereof

CN122011900ACN 122011900 ACN122011900 ACN 122011900ACN-122011900-A

Abstract

The invention relates to a bismuth oxychloride-based door handle antistatic coating and a preparation method thereof. Bismuth oxychloride (BiOCl) is used as a novel functional material, has a unique layered crystal structure, excellent chemical stability and good semiconductor performance, and meanwhile, has wide raw material sources and low cost, and has been widely applied in the fields of photocatalysis, pigments and the like.

Inventors

  • LIU LIKAI
  • GAO YONG
  • SUN SICHENG
  • WEI JUNLING

Assignees

  • 山东旋体新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (7)

  1. 1. The door handle antistatic coating based on the bismuth oxychloride is characterized by being prepared from the following raw materials, by mass, 15-30% of bismuth oxychloride, 3-8% of a modifier, 25-40% of a binder, 20-45% of a solvent and 1-5% of an auxiliary agent, wherein the modifier is a silane coupling agent KH-550 or KH-570, and the binder is one or more of epoxy resin E-44, polyurethane or acrylic resin.
  2. 2. The bismuth oxychloride-based door handle antistatic coating according to claim 1, wherein the bismuth oxychloride is nano-sized particles with the particle size of 50-200nm, the surface is subjected to hydroxylation treatment, and the hydroxyl content is 0.8-1.5mmol/g.
  3. 3. The bismuth oxychloride-based door handle antistatic coating according to claim 1, wherein the solvent is one or more of ethanol, ethyl acetate and xylene, and the mass ratio of ethanol is not less than 30% of the total mass of the solvent.
  4. 4. The bismuth oxychloride-based antistatic coating for the door handle according to claim 1, wherein the auxiliary agent comprises a dispersing agent, a leveling agent and an anti-aging agent, wherein the mass ratio of the dispersing agent to the leveling agent is 3:2:1, the dispersing agent is a polycarboxylate dispersing agent, the leveling agent is an organosilicon leveling agent, and the anti-aging agent is a hindered phenol anti-aging agent.
  5. 5. The preparation method of the antistatic coating of the door handle based on bismuth oxychloride as set forth in any one of claims 1 to 3, which is characterized in that nano bismuth oxychloride particles are added into deionized water, ultrasonic dispersion is carried out for 30 to 60 minutes, bismuth oxychloride suspension with the mass concentration of 10 to 20 percent is obtained, the suspension is heated to 60 to 80 ℃, sodium hydroxide with the mass of 5 to 10 percent of the bismuth oxychloride is added, stirring reaction is carried out for 2 to 3 hours, centrifugal separation is carried out after the reaction is finished, washing is carried out to neutrality, and hydroxylation bismuth oxychloride is obtained after drying; The preparation method of the antistatic coating of the door handle based on bismuth oxychloride as claimed in claim 4, which is characterized in that a solvent is added into a stirring kettle, a dispersing agent and a leveling agent are sequentially added under the stirring condition, and the stirring is carried out for 10-15min, then hydroxylated bismuth oxychloride is added, the temperature is raised to 40-50 ℃, the stirring is carried out for 20-30min at a high speed, and ultrasonic dispersion is carried out for 20-40min, so that bismuth oxychloride pre-dispersion is obtained; The method for preparing the anti-static coating of the door handle based on bismuth oxychloride as set forth in claim 5, wherein the adhesive is added into the pre-dispersion liquid, and stirred for 30-45min at 600-800r/min, and then the modifier and the anti-aging agent are added, and stirring is continued for 15-20min, and the coating slurry is obtained after filtration; The method for preparing the anti-static coating for the door handle based on bismuth oxychloride as claimed in claim 6, wherein the coating is coated and cured by immersing the pretreated door handle substrate in coating slurry for dip coating, taking out, standing at room temperature for 10-20min, then curing for 20-40min at 120-160 ℃, and cooling to obtain the anti-static coating.
  6. 6. The method for preparing the anti-static coating of the door handle based on bismuth oxychloride as claimed in claim 7, wherein the pretreatment process of the door handle substrate in the step 6 comprises the steps of sequentially sanding, ultrasonic cleaning with ethanol, washing with deionized water and drying at 60-80 ℃ for 10-15min.
  7. 7. The method for preparing an antistatic coating for a door handle based on bismuth oxychloride as claimed in claim 8, wherein the dip-coating speed in the step 7 is 5-10cm/min and the coating thickness is 50-150 μm.

Description

Bismuth oxychloride-based door handle antistatic coating and preparation method thereof Technical Field The invention relates to a bismuth oxychloride-based door handle antistatic coating and a preparation method thereof. Background In daily life and industrial production, the door handle is used as a high-frequency contact component, and static electricity is easily accumulated on the surface of the door handle due to human friction or environmental factors. The accumulation of static electricity can not only cause uncomfortable feeling of human body electric shock, but also cause electrostatic discharge phenomenon in special places such as electronic workshops, laboratories and the like, damage precise electronic equipment, and even bring about potential safety hazards such as fire and explosion in flammable and explosive environments. Therefore, it is important to develop a door handle coating having excellent antistatic properties. Currently, the antistatic coating of the door handle on the market mostly uses conductive polymers (such as polyaniline and polythiophene) or metal conductive fillers (such as silver powder and copper powder) as core functional components. However, the conductive polymer coating has obvious limitations that the antistatic performance of the conductive polymer coating is easily affected by environmental humidity, the performance is greatly reduced under a dry environment, the abrasion resistance is poor, the coating is easily fallen off and fails after long-term use, the metal conductive filler coating has high cost and is easy to oxidize to cause the color change of the coating although the conductivity is stable, meanwhile, the sedimentation of metal particles is poor, the problem of uneven dispersion easily occurs in the preparation process, and the appearance and the performance uniformity of the coating are affected. However, there is no report on the application of bismuth oxychloride to an antistatic coating of a door handle, and the application potential of the bismuth oxychloride in the antistatic field is still to be further developed. Disclosure of Invention Aiming at the problems of unstable antistatic performance, poor abrasion resistance, high cost, easy oxidation and the like of the existing door handle antistatic coating, the invention provides the bismuth oxychloride-based door handle antistatic coating and the preparation method thereof, the coating takes bismuth oxychloride as a core antistatic component, the synergistic effect of the modifier and the binder is combined, so that excellent and stable antistatic performance is realized, good wear resistance, corrosion resistance and decoration are achieved, the preparation process is simple, the cost is low, and the method is suitable for large-scale industrial production. Technical proposal The technical scheme is that the door handle antistatic coating based on bismuth oxychloride is prepared from the following raw materials, by mass, 15-30% of bismuth oxychloride, 3-8% of a modifier, 25-40% of a binder, 20-45% of a solvent and 1-5% of an auxiliary agent, wherein the modifier is a silane coupling agent KH-550 or KH-570, and the binder is one or more of epoxy resin E-44, polyurethane or acrylic resin. Further, the bismuth oxychloride is nano-sized particles with the particle size of 50-200nm, the surface of the bismuth oxychloride is subjected to hydroxylation treatment, the hydroxyl content is 0.8-1.5mmol/g, and the hydroxylation treatment can improve the compatibility of the bismuth oxychloride with a binder and a modifier and enhance the internal binding force of a coating. Further, the solvent is one or more of ethanol, ethyl acetate and xylene, wherein the mass ratio of the ethanol is not less than 30% of the total mass of the solvent, and the addition of the ethanol can improve the dispersibility of each raw material and reduce the film forming temperature of the coating. Further, the auxiliary agent comprises a dispersing agent, a leveling agent and an anti-aging agent, wherein the mass ratio of the dispersing agent to the leveling agent is 3:2:1, the dispersing agent is a polycarboxylate dispersing agent, the leveling agent is an organosilicon leveling agent, and the anti-aging agent is a hindered phenol anti-aging agent. The invention also provides a preparation method of the door handle antistatic coating based on bismuth oxychloride, which comprises the following steps: 1. The hydroxylation modification of bismuth oxychloride comprises the steps of adding nano bismuth oxychloride particles into deionized water, performing ultrasonic dispersion for 30-60min to obtain bismuth oxychloride suspension with the mass concentration of 10-20%, heating the suspension to 60-80 ℃, adding sodium hydroxide with the mass of 5-10% of the bismuth oxychloride, stirring and reacting for 2-3h, performing centrifugal separation after the reaction is finished, washing with deionized water to be neutral, and drying at 80