Low temperature curing epoxy low-gloss powder coating and preparation method thereof
A powder coating and epoxy technology, applied in powder coatings, epoxy resin coatings, coatings, etc., can solve the problems of increased energy consumption, long curing time, high film forming temperature, etc., and achieve excellent chemical resistance, physical and mechanical Good performance and stable coating gloss
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[0033] Example 1
[0034] The composition and weight ratio of low-temperature curing epoxy low-gloss powder coating are:
[0035] 200 parts of epoxy resin with epoxy equivalent of 740g / eq
[0036] 5.0 parts of 2-methylimidazole
[0037] 80 parts of barium sulfate
[0038] Acrylic leveling agent 502 2.4 parts
[0039] Benzoin 1.2 parts
[0040] Permeable agent 703 1.5 parts
[0041] Power increase agent EDI 1.2 parts
[0042] Carbon black MA-100 3.0 parts
[0043] Preparation:
[0044] (a) Weigh epoxy resin, 2-methylimidazole, barium sulfate, acrylate leveling agent 502, benzoin, breather 703, power increasing agent EDI and carbon black MA-100 in proportion, and place them in the mixing tank , Mix well and crush for 1~5 minutes;
[0045] (b) The crushed material is extruded into the twin or single screw extruder; the heating temperature of the extruder is controlled at 90℃;
[0046] (c) The extruded material is pulverized into a powder with a particle size (equivalent particle size D50) of 50 m...
Example Embodiment
[0047] Example 2
[0048] The composition and weight ratio of low-temperature curing epoxy low-gloss powder coating are:
[0049] 200 parts of epoxy resin with epoxy equivalent of 740g / eq
[0050] 5.0 parts of 2-methylimidazole
[0051] 10 parts of methacrylic acid and methyl methacrylate copolymer
[0052] 80 parts of barium sulfate
[0053] Acrylic leveling agent 502 2.4 parts
[0054] Benzoin 1.2 parts
[0055] Permeable agent 703 1.5 parts
[0056] Power increase agent EDI 1.2 parts
[0057] Carbon black MA-100 3.0 parts
[0058] Preparation:
[0059] (a) Weigh epoxy resin, epoxy resin, 2-methylimidazole, copolymer of methacrylic acid and methyl methacrylate, barium sulfate, acrylic leveling agent 502, benzoin, breather 703, EDI and carbon black MA-100 are placed in the mixing tank, fully mixed and crushed for 1 to 5 minutes;
[0060] (b) The crushed material is extruded into the twin or single screw extruder; the heating temperature of the extruder is controlled at 90℃;
[0061] (c) The ex...
Example Embodiment
[0062] Example 3
[0063] The composition and weight ratio of low-temperature curing epoxy low-gloss powder coating are:
[0064] 200 parts of epoxy resin with epoxy equivalent of 740g / eq
[0065] 5.0 parts of 2-methylimidazole
[0066] 20 parts of methacrylic acid and methyl methacrylate copolymer
[0067] 80 parts of barium sulfate
[0068] Acrylic leveling agent 502 2.4 parts
[0069] Benzoin 1.2 parts
[0070] Permeable agent 703 1.5 parts
[0071] Power increase agent EDI 1.2 parts
[0072] Carbon black MA-100 3.0 parts
[0073] Preparation:
[0074] (a) Weigh epoxy resin, epoxy resin, 2-methylimidazole, copolymer of methacrylic acid and methyl methacrylate, barium sulfate, acrylic leveling agent 502, benzoin, breather 703, EDI and carbon black MA-100 are placed in the mixing tank, fully mixed and crushed for 30 minutes;
[0075] (b) The crushed material is extruded into the twin or single screw extruder; the heating temperature of the extruder is controlled at 100℃;
[0076] (c) The extru...
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