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CN-121975408-A - Antistatic high-heat-dissipation powder coating for cloud computing server and preparation method thereof

CN121975408ACN 121975408 ACN121975408 ACN 121975408ACN-121975408-A

Abstract

The invention relates to the technical field of powder coating, and discloses an antistatic high-heat-dissipation powder coating for a cloud computing server and a preparation method thereof, wherein the powder coating comprises additives such as superfine sand grain agent, carbon nano tubes, heat-dissipation filler and the like, wherein the carbon nano tubes are used as antistatic agents, and the influence of static electricity on electronic equipment is effectively eliminated; the heat dissipation filler is prepared by linking molybdenum disulfide and silicon dioxide through an intermediate connecting agent, wherein the molybdenum disulfide has excellent heat conduction performance, the silicon dioxide has high radiation performance, heat led in by the molybdenum disulfide can be timely dissipated, meanwhile, the molybdenum disulfide and the silicon dioxide are tightly combined by the intermediate connecting agent to form a combined body, so that heat dissipation at the first time is realized, and the molybdenum disulfide and the silicon dioxide combined body form a continuous passage through the intermediate connecting agent, so that faster heat transfer is realized, and timely heat dissipation is realized.

Inventors

  • LIU PINGMIN
  • SHAN CONGCONG

Assignees

  • 航佳彩新材料(广东)有限公司

Dates

Publication Date
20260505
Application Date
20260305

Claims (6)

  1. 1. The antistatic high-heat-dissipation powder coating for the cloud computing server is characterized by comprising the following raw materials in parts by weight: 50-60 parts of hydroxyl polyester resin, 2-5 parts of carbon nano tubes, 3-6 parts of heat dissipation filler, 3-5 parts of curing agent, 0.3-0.5 part of accelerator, 2-5 parts of flatting agent and 1-3 parts of adhesion accelerator.
  2. 2. The antistatic high-heat-dissipation powder coating for the cloud computing server is characterized in that the curing agent is diphenylmethane diisocyanate or toluene diisocyanate, the accelerator is dibutyltin dilaurate or stannous octoate, the leveling agent is polyethyl acrylate or polybutyl acrylate, and the adhesion accelerator is ‌ silane coupling agent KH-560 ‌.
  3. 3. The antistatic high heat dissipation powder coating for a cloud computing server according to claim 1, wherein the preparation method of the heat dissipation filler comprises the following steps: firstly, adding 3, 5-difluorobenzoic acid into N-methylpyrrolidone, stirring uniformly, adding 2,2' -sulfonyl diethanol and an alkaline catalyst, heating to 110-120 ℃, keeping the temperature, stirring for 8-10h, then continuously heating to 130-140 ℃, continuously stirring for 3-6h, continuously heating to 150-160 ℃, continuously stirring for 3-6h, cooling to room temperature after the reaction is finished, filtering, washing and drying to obtain an intermediate connecting agent; Secondly, adding molybdenum disulfide and silicon dioxide into ethanol water solution with volume fraction of 90-95%, regulating pH to be acidic by acetic acid, adding a silane coupling agent KH-550 after ultrasonic dispersion uniformly, heating to 50-60 ℃, stirring for 2-3h, filtering, washing and drying to obtain a modified inorganic substance; And thirdly, adding an intermediate connecting agent into N, N-dimethylformamide, uniformly stirring, adding modified inorganic matter dispersion liquid and p-toluenesulfonic acid, heating to 80-90 ℃, preserving heat, stirring for 6-10h, and filtering, washing and drying after the reaction is finished to obtain the heat dissipation filler.
  4. 4. The antistatic high heat dissipation powder coating for cloud computing servers as recited in claim 3, wherein in the first step, the mass ratio of 3, 5-difluorobenzoic acid to 2,2' -sulfonyldiethanol is 1:0.5-0.53.
  5. 5. An antistatic high heat dissipation powder coating for a cloud computing server as recited in claim 3, wherein in the first step, said basic catalyst is anhydrous potassium carbonate.
  6. 6. A method for preparing the antistatic high heat dissipation powder coating for the cloud computing server as claimed in claim 1, comprising the following steps: step one, mixing hydroxyl polyester resin, carbon nano tubes and heat dissipation fillers, and stirring at a speed of 900-1000r/min to obtain a pre-dispersion; Mixing the pre-dispersion, the curing agent, the accelerator, the leveling agent and the adhesion accelerator, adding the mixture into a double-screw extruder, and setting the temperature in a first area at 90-100 ℃, in a second area at 100-120 ℃ and in a third area at 120-130 ℃ to obtain a high-temperature melt; And thirdly, adding the high-temperature melt into a cooling roller, pressing into slices, adding the slices into a crusher after cooling, crushing into small fragments, adding the small fragments into an airflow vortex type crusher, grinding into fine powder, and sieving with a 80-90um sieve to obtain the powder coating.

Description

Antistatic high-heat-dissipation powder coating for cloud computing server and preparation method thereof Technical Field The invention relates to the technical field of powder coatings, in particular to an antistatic high-heat-dissipation powder coating for a cloud computing server and a preparation method thereof. Background With the explosive growth of cloud computing data center size and computing power density, servers are facing unprecedented harsh operating environments. Although the traditional coating has certain voltage resistance and electromagnetic shielding capability, under multiple tests of long-term high heat, frequent contact, static accumulation and the like, the comprehensive performance of the traditional coating is still insufficient, and further breakthrough in material stability and functional integration is needed to be realized. Thermal management and electrostatic protection have become two major core challenges that limit system reliability in the trend of high density deployment of data centers and high-end computing devices. On the one hand, the power consumption in unit volume is increased sharply, so that the heat dissipation pressure is increased sharply. The traditional coating material has low heat conductivity, forms obvious heat resistance at key heating interfaces of chips, power modules and the like, and seriously prevents heat from being efficiently transferred to a radiator or an external environment. The local accumulation of heat not only can cause performance degradation, but also can accelerate the aging of electronic components and directly threaten the running efficiency and service life of equipment, on the other hand, the high-speed and high-integration circuit in the equipment is extremely sensitive to static electricity. The surface resistivity of the common insulating coating is extremely high, and a large amount of static charge is easily accumulated due to friction and induction in operation or maintenance. Once the instant electrostatic discharge occurs, the instant high voltage and the large current generated by the instant electrostatic discharge can directly break down a precise circuit, so that irreversible hardware damage is caused, and hidden but fatal threat is brought to the stability of the system. Therefore, developing a composite functional powder coating with high heat dissipation and static resistance becomes a key material technology innovation direction for improving the reliability of a cloud computing server, reducing the operation and maintenance difficulty and guaranteeing the continuous and stable operation of a data center, and is not only an upgrade of appearance protection, but also a core requirement for directly serving equipment thermal management, electrical safety and full life cycle maintenance. The invention patent with the application number of CN201911408405.8 discloses a heat-dissipating powder coating and a preparation method thereof, wherein the powder coating comprises components such as saturated carboxyl-terminated polyester resin, a curing agent, a composite heat-dissipating filler, an orientation arrangement agent, titanium dioxide, polytetrafluoroethylene, aluminum pigment and the like, wherein the composite heat-dissipating filler is prepared by sequentially ball milling, mixing and spheroidizing hexagonal boron nitride, aluminum hydroxide and aluminum oxide, so that the heat conductivity of the composite heat-dissipating filler can be effectively improved, and the heat-dissipating powder coating has a heat-dissipating effect by synergistic effect with the aluminum pigment, however, the invention is limited by the expensive price of a hexagonal boron nitride material and faces a great challenge in cost control, and based on the heat-dissipating powder coating, the heat-dissipating powder coating is relatively economical and excellent in heat-dissipating effect. Disclosure of Invention The invention aims to provide an antistatic high-heat-dissipation powder coating for a cloud computing server and a preparation method thereof. The aim of the invention can be achieved by the following technical scheme: an antistatic high-heat-dissipation powder coating for a cloud computing server comprises the following raw materials in parts by weight: 50-60 parts of hydroxyl polyester resin, 2-5 parts of carbon nano tubes, 3-6 parts of heat dissipation filler, 3-5 parts of curing agent, 0.3-0.5 part of accelerator, 2-5 parts of flatting agent and 1-3 parts of adhesion accelerator. Further, the curing agent is diphenylmethane diisocyanate or toluene diisocyanate, the accelerator is dibutyltin dilaurate or stannous octoate, the leveling agent is polyethyl acrylate or polybutyl acrylate, and the adhesion accelerator is ‌ silane coupling agent KH-560 ‌. Further, the preparation method of the heat radiation filler comprises the following steps: Firstly, adding 2.4-2.6g of 3, 5-difluorobenzoic acid into 50ml of N-methylpyrrolidone, un