Heat-dissipating powder coating modifying aid and preparation method thereof
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A powder coating and modification technology, applied in the direction of coating, can solve the problems of weak surface adhesion, small application range, unsatisfactory use effect, etc., to improve the mechanical properties of materials, enhance thermal conductivity, and improve wear resistance. Effect
Inactive Publication Date: 2015-08-19
FOSHAN HECAI TECH SERVICE
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[0003] The heat-dissipating powder coatings currently produced are generally used for heat dissipation of components of electronic products such as CPUs and heat dissipation of LED lamps. The requirements for the medium for painting are relatively high, and the adhesion to rough and loose surfaces is not strong, and the use effect is not ideal. , the scope of application is small
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preparation example Construction
[0020] Preparation of Modified Auxiliary Materials for Heat Dissipating Coatings
[0021] Each raw material is weighed according to the following parts by weight: 25 parts of nano kaolinite, 3 parts of corundum, 9 parts of phosphate rock, 6 parts of polyacrylate, 6 parts of aluminum dihydrogen phosphate, 6 parts of light calcium carbonate, silane dihydrogen 1.3 parts of joint agent, 0.4 parts of isothiazolinone, enter the preparation process after weighing:
[0022] A. Calcining nano-kaolinite and corundum at 750° C. for 1 hour, mixing and grinding them with light calcium carbonate after discharging to obtain premix a;
[0023] B. Mix phosphate rock and aluminum dihydrogen phosphate for ball milling, add polyacrylate during the ball milling process, and keep stirring at 85°C for 8 minutes to obtain premix b;
[0024] C. Mix premix a and premix b, add the remaining raw materials, and stir and disperse;
[0025] D. Drying to obtain paint modification additives for later use. ...
Embodiment 1-3
[0037] Embodiment 1-3—powder coating for radiator shell
[0038] A powder coating for the outer shell of a radiator, which is composed of the following raw materials in parts by weight: 60 parts of E-44 epoxy resin, 15 parts of montmorillonite powder, 2 parts of ethylene bisstearamide, 2 parts of anti-scorch agent CTP, tetramethyl 3 parts of oxymethyl glycoluril, 2 parts of phthalic anhydride, 6 parts of quasi-spherical silica powder, 3 parts of hollow glass microspheres, 2 parts of polyvinylpyrrolidone, 0.2 parts of tert-butyl peroxyacetate, dimethylaminopropylamine 10 parts, 4 parts of ethylene glycol, and 10 parts of heat-dissipating modified additives.
[0039] Mix the above montmorillonite powder with ethylene glycol, stir well, add quasi-spherical silica powder, keep the temperature at 40°C, stir and mix thoroughly, add tert-butyl peroxyacetate, stir and disperse at 2000 rpm for 6 minutes, add the remaining The raw materials are melted and extruded through an extruder, ...
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Abstract
The invention provides a heat-dissipating powder coating modifying aid. The heat-dissipating powder coating modifying aid is prepared from such components in parts by weigh as 20-30 parts of nano kaolinite, 3-5 parts of corundum, 8-10 parts of phosphate ore, 3-10 parts of polyacrylate, 5-8 parts of aluminum dihydrogen phosphate, 5-8 parts of limestone, 1-1.5 parts of silane coupling agent and 0-0.7 part of bactericide. The preparation method of the heat-dissipating powder coating modifying aid comprises the steps of A, calcining the nano kaolinite and the phosphate ore at a temperature within the range of 650-750 DEG C, discharging and cooling, and then mixing the discharged material with the limestone, and grinding into powder, thereby obtaining a premix a, B, mixing the phosphate ore and the aluminum dihydrogen phosphate for ball milling, adding the polyacrylate in the ball milling process, stirring while preserving the heat within the range of 85-90 DEG C, thereby obtaining a premix b, C, mixing the premixes, adding the left raw materials and stirring for dispersing, and D, drying to obtain the coating modifying aid. The invention provides the heat-dissipating powder coating modifying aid capable of improving the adhesion of the heat-dissipating powder coating to the surface of an object, and the preparation method of the modifying aid; the aid is added to enhance the heat-conducting effect of the coating layer and improve the wear resistance of the coating.
Description
technical field [0001] The invention relates to a coating modification auxiliary material, in particular to a heat dissipation powder coating modification auxiliary material and a preparation method thereof. Background technique [0002] Heat dissipation powder coating is a new type of solvent-free, 100% solid powder coating, which has the characteristics of no solvent, no pollution, good heat dissipation effect, energy and resource saving, labor intensity reduction and high mechanical strength of the coating film. It is widely used in fields requiring heat dissipation such as computers, notebook computers, LED lighting, communications, rectifiers, medical and industrial equipment, and is mainly coated on the surface of radiators. [0003] The heat-dissipating powder coatings currently produced are generally used for heat dissipation of components of electronic products such as CPUs and heat dissipation of LED lamps. The requirements for the medium for painting are relativel...
Claims
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