Search

CN-121975417-A - High-hardness coating material for photosensitive drum and preparation method thereof

CN121975417ACN 121975417 ACN121975417 ACN 121975417ACN-121975417-A

Abstract

The application relates to the technical field of printing consumables, in particular to a high-hardness coating material for a photosensitive drum and a preparation method thereof, wherein the high-hardness coating material comprises, by mass, 25-30 parts of polyurethane resin, 12-15 parts of polyester resin, 8-10 parts of modified silicon dioxide, 15-20 parts of N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative, 10-11 parts of epoxy cross-linking agent, 3-4 parts of modified polyether coupling agent and 150-200 parts of mixed solvent, the mixed solvent comprises toluene and tetrahydrofuran, the mass ratio of toluene to tetrahydrofuran is 3:1, and the high-hardness coating material can improve the coating hardness through the cooperation of the components, remarkably reduce the abrasion rate, ensure the quality of printed images and solve the problems of low hardness and high abrasion rate of the traditional photosensitive drum coating.

Inventors

  • QIU XIAOYONG
  • HONG LINFENG

Assignees

  • 广州麦普实业有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (10)

  1. 1. The high-hardness coating material for the photosensitive drum is characterized by comprising the following components in parts by mass: 25-30 parts of polyurethane resin, 12-15 parts of polyester resin, 8-10 parts of modified silicon dioxide, 15-20 parts of N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative, 10-11 parts of epoxy cross-linking agent, 3-4 parts of modified polyether coupling agent and 150-200 parts of mixed solvent; The mixed solvent comprises toluene and tetrahydrofuran, and the mass ratio of toluene to tetrahydrofuran is 3:1.
  2. 2. The high-hardness coating material for a photosensitive drum according to claim 1, comprising the following components in parts by mass: 26-29 parts of polyurethane resin, 13-15 parts of polyester resin, 8-10 parts of modified silicon dioxide, 16-19 parts of N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative, 10-11 parts of epoxy cross-linking agent, 3-4 parts of modified polyether coupling agent and 170-200 parts of mixed solvent.
  3. 3. The high-hardness coating material for a photosensitive drum according to claim 1, wherein the preparation process of the modified silica comprises: Dispersing nano silicon dioxide with the particle size of 20nm in absolute ethyl alcohol, adding ammonia water and dodecyl triethoxysilane, and reacting for 5-6 hours at 80 ℃ to obtain the modified silicon dioxide.
  4. 4. The high-hardness coating material for a photosensitive drum according to claim 1, wherein the preparation process of the N, N' -tetraphenyl-1, 4-phenylenediamine derivative comprises: And (3) carrying out condensation reaction on triphenylamine and 4-chlorophenyl formaldehyde under an alkaline condition, wherein the reaction temperature is 80 ℃, and the reaction time is 12-14 h, so that the N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative is obtained.
  5. 5. The high-hardness coating material for a photosensitive drum according to claim 1, wherein the preparation process of the epoxy crosslinking agent comprises: bisphenol A and epoxy chloropropane are reacted under alkaline conditions, the reaction temperature is 50-60 ℃, and the reaction time is 8-10 hours, so that the epoxy crosslinking agent is obtained.
  6. 6. The high-hardness coating material for a photosensitive drum according to claim 1, wherein the preparation process of the modified polyether coupling agent comprises: And (3) reacting gamma-aminopropyl triethoxysilane with polyether polyol in the presence of p-toluenesulfonic acid, wherein the reaction temperature is 80 ℃, and the reaction time is 6-8 hours, so as to obtain the modified polyether coupling agent.
  7. 7. The high-hardness coating material for a photosensitive drum according to claim 1, wherein the urethane resin has a brand name of L-6300.
  8. 8. The high-hardness coating material for a photosensitive drum according to claim 1, wherein the polyester resin is of a brand name SJ-9823.
  9. 9. The high-hardness coating material for a photosensitive drum according to claim 1, wherein a coating solution of the high-hardness coating material for a photosensitive drum is applied to a surface of a photosensitive drum substrate to obtain a photosensitive drum.
  10. 10. A method for producing the high-hardness coating material for a photosensitive drum according to any one of claims 1 to 9, comprising the steps of: (1) Preparing corresponding raw materials according to the mass parts of the components of the high-hardness coating material for the photosensitive drum; (2) Adding polyurethane resin, polyester resin and part of mixed solvent into a reaction kettle, heating to 60-65 ℃, stirring until the polyurethane resin, the polyester resin and part of mixed solvent are dissolved, adding modified silicon dioxide at 60-65 ℃, and continuously stirring to obtain mixed material liquid; (3) Adding N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivatives into the mixed liquid at the temperature of 60-65 ℃ and stirring; (4) Adding an epoxy cross-linking agent at 60-65 ℃ and stirring; (5) Continuously adding the modified polyether coupling agent and the rest mixed solvent, preserving heat at 70-75 ℃ for 45-60 min, and cooling to room temperature to obtain a coating solution; And coating the coating solution on the surface of the photosensitive drum substrate, controlling the coating thickness to be 2.5 mu m plus or minus 0.2 mu m, and drying at 90 ℃ for 30-60 min to form the high-hardness coating.

Description

High-hardness coating material for photosensitive drum and preparation method thereof Technical Field The application relates to the technical field of printing consumables, in particular to a high-hardness coating material for a photosensitive drum and a preparation method thereof. Background Photosensitive drums, which are the core components of laser printers and copiers, are the "heart" in electrostatic imaging systems. The photosensitive device is mainly made of photoconductive material, and its basic working principle is photoelectric conversion process, in which after the photosensitive drum is charged and irradiated by laser, the surface of the photosensitive drum forms electrostatic latent image, and further forms visible carbon powder image. The photosensitive drums may be classified into OPC drums (organic photoconductive materials), se drums (Se selenium), and ceramic drums, depending on the photosensitive materials. Among them, OPC drums are widely used in laser printers because of low cost and stable performance, and the quality of the OPC drums directly determines the quality of printed images. The traditional photosensitive drum coating is mostly made of epoxy resin or organic silicon materials, the hardness of the traditional photosensitive drum coating is generally low, the coating abrasion rate caused by friction is high in a ten-thousand-level printing period, the problems of image density attenuation and background powder leakage are directly caused, and the printing quality is seriously affected. To this end, the present application provides a high hardness coating material for photosensitive drums and a method for preparing the same. Disclosure of Invention In order to overcome the defects of the prior art, the application provides the high-hardness coating material for the photosensitive drum and the preparation method thereof, and the high-hardness coating material improves the coating hardness through the cooperation of all the components, obviously reduces the abrasion rate, ensures the quality of printed images and solves the problems of low hardness and high abrasion rate of the traditional photosensitive drum coating. The technical scheme adopted for solving the technical problems is as follows: According to a first aspect of the present application, there is provided a high-hardness coating material for a photosensitive drum, comprising, in parts by mass: 25-30 parts of polyurethane resin, 12-15 parts of polyester resin, 8-10 parts of modified silicon dioxide, 15-20 parts of N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative, 10-11 parts of epoxy cross-linking agent, 3-4 parts of modified polyether coupling agent and 150-200 parts of mixed solvent; The mixed solvent comprises toluene and tetrahydrofuran, and the mass ratio of toluene to tetrahydrofuran is 3:1. In some embodiments, the high hardness coating material for photosensitive drums comprises the following components in parts by mass: 26-29 parts of polyurethane resin, 13-15 parts of polyester resin, 8-10 parts of modified silicon dioxide, 16-19 parts of N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative, 10-11 parts of epoxy cross-linking agent, 3-4 parts of modified polyether coupling agent and 170-200 parts of mixed solvent. In some embodiments, the modified silica is prepared by a process comprising: Dispersing nano silicon dioxide with the particle size of 20nm in absolute ethyl alcohol, adding ammonia water and dodecyl triethoxysilane, and reacting for 5-6 hours at 80 ℃ to obtain the modified silicon dioxide. In some embodiments, the process for preparing the N, N' -tetraphenyl-1, 4-phenylenediamine derivative comprises: And (3) carrying out condensation reaction on triphenylamine and 4-chlorophenyl formaldehyde under an alkaline condition, wherein the reaction temperature is 80 ℃, and the reaction time is 12-14 h, so that the N, N, N ', N' -tetraphenyl-1, 4-phenylenediamine derivative is obtained. In some embodiments, the preparation process of the epoxy crosslinking agent comprises the steps of reacting bisphenol A with epichlorohydrin under alkaline conditions, wherein the reaction temperature is 50-60 ℃ and the reaction time is 8-10 hours, so as to obtain the epoxy crosslinking agent. In some embodiments, the modified polyether coupling agent is prepared by a process comprising: And (3) reacting gamma-aminopropyl triethoxysilane with polyether polyol in the presence of p-toluenesulfonic acid, wherein the reaction temperature is 80 ℃, and the reaction time is 6-8 hours, so as to obtain the modified polyether coupling agent. In some embodiments, the polyurethane resin is identified by the trademark L-6300. In some embodiments, the polyester resin is available under the designation SJ-9823. In some embodiments, the photosensitive drum is coated on the surface of a photosensitive drum substrate with a coating solution of a high-hardness coating material to obtain the photosensitive drum. Accordin