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CN-121991591-A - Anti-fingerprint electronic product shell and preparation method thereof

CN121991591ACN 121991591 ACN121991591 ACN 121991591ACN-121991591-A

Abstract

The invention discloses an anti-fingerprint electronic product shell and a preparation method thereof, and relates to the technical field of anti-fingerprint coatings, wherein the process comprises the steps of mixing photo-curing resin, reactive diluent, nano particles, photoinitiator and auxiliary agent to obtain the anti-fingerprint coating; spraying, photo-curing to form an anti-fingerprint coating to obtain an electronic product shell, wherein the photo-curing resin comprises epoxy modified acrylate resin, and the epoxy modified acrylate resin is prepared by the reaction of acrylate monomers, epoxidized organic silicon and glycidyl methacrylate. The invention introduces organosilicon and fluorine chain segments into a polymer cross-linked network in a chemical bonding mode, and provides a durable and stable low-surface energy basis for the coating. The nano SiO2 particles and chitin-based hybrid resin subjected to surface modification are utilized and are tightly combined with a resin matrix through chemical bonds, a stable micro-nano coarse structure is constructed in the coating, excellent water and oil repellency is realized, and the prepared coating can show more excellent fingerprint resistance.

Inventors

  • Chen Qiachang
  • ZHANG SUPING
  • SHI HAITAO
  • Huo Nanying
  • ZENG CHUNYU

Assignees

  • 江西纵胜新材料有限公司

Dates

Publication Date
20260508
Application Date
20260212

Claims (10)

  1. 1. The preparation method of the anti-fingerprint electronic product shell is characterized by comprising the following steps of: Mixing and dispersing photo-curing resin, reactive diluent, nano particles, photoinitiator and auxiliary agent to obtain anti-fingerprint coating, spraying the anti-fingerprint coating on the surface of a substrate, photo-curing to form an anti-fingerprint coating, and obtaining an electronic product shell; The photo-curing resin comprises epoxy modified acrylate resin, epoxy acrylate, polyurethane acrylate and hybrid resin; The epoxy modified acrylic resin is prepared by the reaction of an acrylic monomer, epoxidized organic silicon and glycidyl methacrylate.
  2. 2. The method for preparing the anti-fingerprint electronic product shell according to claim 1, wherein the epoxy modified acrylate resin is prepared by the following process: Mixing an acrylic ester monomer and an initiator in propylene glycol methyl ether acetate, and polymerizing at 70-80 ℃ for 4-6 hours to obtain a copolymer solution; and adding the epoxidized organosilicon and the triethylamine, heating to 90-100 ℃, reacting for 3-5 hours, cooling to 65-70 ℃, adding the glycidyl methacrylate and the polymerization inhibitor, and reacting for 2-3 hours to obtain the epoxy modified acrylate resin.
  3. 3. The method for preparing the anti-fingerprint electronic product shell according to claim 2, wherein the epoxidized organosilicon is prepared by the following process: mixing polyether modified silicone oil, maleic anhydride, 4-dimethylaminopyridine and hydroquinone, heating to 70-80 ℃ under the protection of nitrogen, and stirring for reacting for 4-5 hours to obtain an organosilicon intermediate; And adding epoxy resin and triphenylphosphine, mixing, heating to 100-110 ℃, and continuing to react for 3-4 hours to obtain the epoxidized organosilicon.
  4. 4. The method for preparing the anti-fingerprint electronic product shell according to claim 3, wherein the polyether modified silicone oil is prepared by the following process: Adding trifluoropropyl methyl cyclotrisiloxane and tetrahydrofuran into n-butyllithium n-hexane solution in nitrogen atmosphere at the temperature of 0-5 ℃ for stirring reaction for 4-6 hours, and finally adding dimethyl chlorosilane for continuous reaction for 1-2 hours to obtain a fluosilicon compound; And mixing the fluorine silicon compound and the catalyst in anhydrous toluene in a nitrogen atmosphere, heating to 40-50 ℃, adding allyl polyoxyethylene polyoxypropylene ether, heating to 75-80 ℃, and reacting for 10-12 hours to obtain the polyether modified silicone oil.
  5. 5. The method for preparing the anti-fingerprint electronic product shell according to claim 1, wherein the hybrid resin is prepared by the following process: Dispersing chitin into an ethanol/water mixed solution, regulating the pH to 4-5, adding KH-570, stirring and reacting for 4-6 hours at 60-65 ℃, adding ethyl orthosilicate, regulating the pH to 8-9, and stirring and reacting for 12-24 hours at room temperature to obtain the hybrid resin.
  6. 6. The method for preparing the anti-fingerprint electronic product shell according to claim 1, wherein the anti-fingerprint coating comprises the following components, by mass, 65-100 parts of light-cured resin, 15-25 parts of reactive diluents, 2-5 parts of nanoparticles, 3-6 parts of photoinitiators and 0.7-2.5 parts of auxiliary agents; The photo-curing resin comprises the following mass components of 30-40 parts of epoxy modified acrylic resin, 20-30 parts of epoxy acrylic ester, 10-20 parts of polyurethane acrylic ester and 5-10 parts of hybrid resin; the reactive diluent comprises hydroxyethyl acrylate, tripropylene glycol diacrylate and isobornyl acrylate, and the mass ratio is 2:5:1.5.
  7. 7. The preparation method of the anti-fingerprint electronic product shell is characterized in that the epoxy modified acrylate resin comprises, by mass, 80-100 parts of acrylate monomers, 25-35 parts of epoxidized organosilicon, 0.6-0.8 part of initiator, 0.5-1.0 part of triethylamine, 5-8 parts of glycidyl methacrylate, 0.04-0.08 part of polymerization inhibitor and 50 parts of propylene glycol methyl ether acetate; The acrylic ester monomer comprises, by mass, 35-40 parts of butyl acrylate, 20-25 parts of methyl methacrylate, 5-8 parts of acrylic acid, 8-10 parts of hydroxyethyl acrylate, 2-3 parts of N-methylolacrylamide and 1-5 parts of octadecyl acrylate.
  8. 8. The method for preparing the anti-fingerprint electronic product shell according to claim 3, wherein the epoxidized organosilicon comprises, by mass, 100 parts of polyether modified silicone oil, 8-12 parts of maleic anhydride, 0.1-0.2 part of 4-dimethylaminopyridine, 0.02-0.05 part of hydroquinone, 30-45 parts of epoxy resin and 0.3-0.6 part of triphenylphosphine.
  9. 9. The method for preparing an anti-fingerprint electronic product shell according to claim 5, wherein the hybrid resin comprises, by mass, 10 parts of chitin, 3-5 parts of KH-570, and 2.5-3.5 parts of ethyl orthosilicate.
  10. 10. An anti-fingerprint electronic product housing made by the method of any one of claims 1-9.

Description

Anti-fingerprint electronic product shell and preparation method thereof Technical Field The invention relates to the technical field of anti-fingerprint coatings, in particular to an anti-fingerprint electronic product shell and a preparation method thereof. Background The back cover of the electronic products such as the mobile phone, the tablet personal computer and the like is the most direct and frequent perception layer of the user. When a user holds the device, the rear cover is stained with fingerprints, becomes sticky and wet and slippery, influences the use feeling of the user and the appearance of the product, sweat and sebum contain moisture, inorganic salt, fatty acid and the like, the sweat and the sebum are attached to the surface of the device for a long time, the fingerprint is corroded and influenced, and the stain of the fingerprints is not beneficial to the representation of the texture of the product. For user experience, equipment protection and commercial value, solutions for applying anti-fingerprint coatings to the housing surface are common in the industry. The current mainstream anti-fingerprint coating technology mainly depends on two substances, namely fluorine-containing compounds and organosilicon compounds. The substances can effectively reduce the surface energy of the coating, so that the coating has certain hydrophobicity and oleophobicity, and the fingerprint prevention and easy cleaning effects are realized. However, the prior anti-fingerprint coating technology still has a plurality of pain points to be solved, namely the anti-fingerprint coating depends on physically blended small molecule fluorine-containing or organosilicon auxiliary agents. The auxiliary agents have weak binding force with the resin matrix, are easy to migrate and run away due to friction, wiping or sweat erosion in the use process, so that the anti-fingerprint performance is rapidly attenuated, and the service life is short. To obtain good anti-fingerprint results, it is necessary to introduce a large amount of low surface energy components, but this tends to sacrifice the adhesion of the coating to the substrate and the hardness of the coating itself. The coating with poor adhesive force is easy to peel and flake, while the coating with low hardness is not scratch-resistant and cannot meet the severe requirements of daily use of electronic products. Therefore, we propose an anti-fingerprint electronic product housing and a method for manufacturing the same. Disclosure of Invention The invention aims to provide an anti-fingerprint electronic product shell and a preparation method thereof, which are used for solving the problems in the background technology. In order to solve the technical problems, the invention provides the technical scheme that the anti-fingerprint electronic product shell comprises a substrate and an anti-fingerprint coating arranged on the surface of the substrate. Furthermore, the anti-fingerprint coating is sprayed on the surface of the substrate through the anti-fingerprint coating, and is formed after drying and curing. Furthermore, after the anti-fingerprint coating is sprayed and cured, CNC (computer numerical control) precise cutting and forming processing is carried out, so that the electronic product shell with high dimensional accuracy and smooth edge is obtained. The preparation method of the anti-fingerprint electronic product shell comprises the following steps: mixing and dispersing photo-curing resin, reactive diluent, nano particles, photoinitiator and auxiliary agent to obtain the anti-fingerprint coating; Spraying the anti-fingerprint coating on the surface of the substrate, and photo-curing to obtain the electronic product shell. Further, the anti-fingerprint coating comprises, by mass, 65-100 parts of photo-curing resin, 15-25 parts of reactive diluent, 2-5 parts of nano particles, 3-6 parts of photoinitiator and 0.7-2.5 parts of auxiliary agent. Further, the photo-curing resin comprises, by mass, 30-40 parts of epoxy modified acrylate resin, 20-30 parts of epoxy acrylate, 10-20 parts of polyurethane acrylate and 5-10 parts of hybrid resin. The epoxy acrylate has high curing speed, provides basic adhesive force and hardness as a framework, and has good affinity with a substrate. The urethane bond in the polyurethane acrylic ester molecular chain can form a strong intermolecular hydrogen bond, effectively absorb and disperse stress, and endow the coating with excellent wear resistance, high elasticity and impact resistance toughness, and balance system brittleness. The hybrid resin is organic-inorganic hybrid resin, the nanoscale inorganic phase improves the nano reinforcing effect to improve the hardness and barrier property of the coating, the polar functional group plays a role in molecular anchoring to enhance the interfacial adhesion, and simultaneously microscopic roughness is constructed to cooperatively improve the fingerprint resistance. Further, the