Pure epoxy powder coating material preparation method
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An epoxy powder and powder coating technology, applied in epoxy resin coatings, wax coatings, anti-corrosion coatings, etc., can solve problems such as poor coverage performance, poor physical properties, and inability to meet production and living needs of powder coatings, and achieve an overall film The effect of stable layer, excellent mechanical properties and good use prospects
Inactive Publication Date: 2018-07-20
徐益禄
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In the prior art, its powder coating is composed of polyester resin, blocked isophor copper diisocyanate, benzoin and dibutyltin dilaurate. Its disadvantages are poor physical properties, poor covering effect, and easy generation of fine bubbles. Unable to meet electrical spraying and surface protection
That is, due to the irrationality of the preparation method of the existing powder coatings, the prepared powder coatings have poor covering performance and cannot meet the needs of production and life.
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[0015] The present invention is further explained below in conjunction with embodiment.
[0016] The preparation method of pure epoxy powder coating of the present invention comprises the following steps:
[0017] S1: Weigh 100-120 parts of bisphenol A epoxy resin, 12-18 parts of curing agent, and 2-3 parts of leveling agent by weight, pulverize them respectively and mix them evenly with a mixer to obtain compound A.
[0018] S2: Weigh 3-6 parts of high-gloss wax, 6-8 parts of flame retardant, 4-8 parts of silicon carbide and 4-9 parts of N,N'-di-sec-butyl-p-phenylenediamine by weight and pass them through the mixer Mix evenly, and keep warm in a constant temperature environment of 180-200 degrees for 0.5 hours to obtain the mixture B.
[0019] S3: Mix the mixture A and the mixture B through a mixer, and heat them at a temperature of 180-200 degrees. After completion, add 2-3 parts of color masterbatch and mix them evenly to obtain the mixture C.
[0020] S4: Extruding the c...
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Abstract
The invention discloses a pure epoxy powder coating material preparation method, which comprises: S1, weighing a bisphenol A type epoxy resin, a curing agent and a leveling agent according to a certain weight part ratio, respectively crushing, and uniformly mixing through a material mixer to obtain a mixture A; S2, weighing high-gloss wax, a flame retardant, silicon carbide and N,N'-di-sec-butyl p-phenylenediamine according to a certain weight part ratio, uniformly mixing through the material mixer, and carrying out thermal insulation for 0.5 h in a 35-45 DEG C constant temperature environmentto obtain a mixture B; S3, uniformly mixing the mixture A and the mixture B through the material mixer, heating to a temperature of 30-52 DEG C, adding color masterbatch after completing the heating,and uniformly mixing to obtain a mixture C; S4, extruding the mixture C through a twin screw extruder; and S5, feeding the mixed premix into the twin screw extruder, extruding, tableting the extrudedmaterial through a tableting machine, cooling, crushing, screening, and packaging to obtain the pure epoxy powder coating material. According to the present invention, the whole film layer is stableafter the product is subjected to spray molding, and the good use prospect is provided.
Description
technical field [0001] The invention relates to the field of powder coatings, in particular to a preparation method of pure epoxy powder coatings. Background technique [0002] Powder coating is a new type of solvent-free 100% solid powder coating. It has the characteristics of no solvent, no pollution, recyclable, environmental protection, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. In the prior art, its powder coating is composed of polyester resin, blocked isophor copper diisocyanate, benzoin and dibutyltin dilaurate. Its disadvantages are poor physical properties, poor covering effect, and easy generation of fine bubbles. Unable to meet electrical spraying and surface protection. That is, due to the irrationality of the preparation method of the existing powder coatings, the prepared powder coatings have poor covering properties and cannot meet the needs of production and life. Contents of the invention [...
Claims
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Application Information
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