Organic polymer material and coating method thereof
A technology of organic polymers and coating methods, applied in the direction of surface coating liquid devices, coatings, powder coatings, etc., can solve the problems of unresolved electrical conductivity of plastics, difficulties in plastic processing and molding, and no decorative effects, etc., to achieve Various decorative effects, free adjustment of gloss, convenient electrostatic coating effect
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[0080] As a preferred embodiment of the present invention, the raw materials of the ultra-low temperature powder coating include: polyester resin, epoxy resin and auxiliary agents, and the auxiliary agents include one or more of catalysts, anti-sticking agents and defoamers .
[0081] Wherein, the main material of the ultra-low temperature powder coating is the main polyester resin containing carboxyl groups, the glass transition temperature is 40-60°C, the acid value is 10-75, and the curing temperature is 90-130°C. Then use low-temperature curing (80-90°C) liquid or low-viscosity solid epoxy resin, and use high-efficiency catalysts to perform low-temperature ring-opening reaction on epoxy resin, add a new type of defoamer for degassing and defoaming, and add a new type of anti-foaming agent. Adhesive, to better solve the problem of adhesion and agglomeration.
[0082] The catalyst can specifically be selected from 2-methylimidazole, 2-phenylimidazoline, tertiary amine and i...
Embodiment 1
[0110] Preparation of ultra-low temperature powder coatings, including:
[0111] (A) 40 parts of polyester resin and auxiliary materials are mixed and extruded into sheets to obtain polyester flakes;
[0112] (B) 40 parts of epoxy resin and auxiliary material are mixed and extruded into a sheet to obtain an epoxy resin sheet;
[0113] (C) mixing the polyester flakes of step (A) with the epoxy resin flakes of step (B) in a ratio of 1:1, and pulverizing them to 25-60 μm with a disc jet mill to obtain the first powder;
[0114] (D) the first powder in step (C) is airflowed to 3-35 μm in a supersonic fluidized bed, and the second powder of 5-25 μm is obtained after classification;
[0115] (E) Grinding 5 parts of the auxiliary agent to 1-9 μm with a supersonic fluidized bed airflow to obtain a third powder, wherein the auxiliary agent includes 2 parts of catalyst, 1 part of anti-sticking agent and 2 parts of defoamer, Described catalyzer is 2-methylimidazole, defoamer is polyeth...
Embodiment 2
[0118] Preparation of ultra-low temperature powder coatings, including:
[0119] (A) 40 parts of polyester resin and auxiliary materials are mixed and extruded into sheets to obtain polyester flakes;
[0120] (B) 60 parts of epoxy resin and auxiliary material are mixed and extruded into a sheet to obtain an epoxy resin sheet;
[0121] (C) mixing the polyester flakes in step (A) with the epoxy resin flakes in step (B) in a ratio of 2:3, and pulverizing them to 25-60 μm with a disc jet mill to obtain the first powder;
[0122] (D) the first powder in step (C) is airflowed to 3-35 μm in a supersonic fluidized bed, and the second powder of 5-25 μm is obtained after classification;
[0123] (E) 8 parts of auxiliary agents are pulverized to 1-9 μm by supersonic fluidized bed air flow to obtain a third powder, wherein the auxiliary agents include 4 parts of catalyst, 2 parts of anti-sticking agent and 2 parts of defoamer, The catalyst is 2-phenylimidazoline, the defoamer is a fluor...
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