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A kind of powder coating, environment-friendly technology, applied in the direction of powder coating, polyester coating, coating, etc., can solve the problems of poor storage stability, poor mechanical properties, practical application difficulties, etc.
Inactive Publication Date: 2017-08-11
ZHEJIANG HUACAI NEW MATERIAL CO LTD
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Problems solved by technology
There are P3220, P3231, CC4643, and CC4648 commercialized ultra-weather-resistant HAA low-temperature curing resins on the market. However, due to the low Tg of the resin, its storage stability is poor, and its practical application is difficult, and its poor mechanical properties limit its application.
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Embodiment 1
[0027] An environmentally friendly HAA low-temperature curing high Tg high toughness high leveling super weather-resistant powder coating formula is as follows:
[0028] Carboxylated polyester resin 65%
[0029] HAA curing agent 4.8%
[0030] Imported leveling agent 1.2%
[0031] Degasser 0.8%
[0032] Antioxidant 0.3%
[0033] Brightener 0.8%
[0034] Dispersing aid 0.5%
[0035] Degassed wax 0.6%
[0036] Toughener 0%
[0037] Weather-resistant pigments 26%
Embodiment 2
[0039] An environmentally friendly HAA low-temperature curing high Tg high toughness high leveling super weather-resistant powder coating formula is as follows:
[0040] Carboxylated polyester resin 63%
[0041] HAA curing agent 4.8%
[0042] Imported leveling agent 1.1%
[0043] Degasser 0.7%
[0044] Antioxidant 0.3%
[0045] Brightener 1.0%
[0046] Dispersing aid 0.5%
[0047] Degassed wax 0.6%
[0048] Toughener 3%
[0049] Weather-resistant pigment 25%
[0050] The powder coating preparation steps are as follows:
[0051] (1) According to the formula of above-mentioned embodiment 1-2, weigh with electronic balance, carry out sufficient premixing then, make it fully mix;
[0052] (2) Melt and extrude the uniformly mixed material, the extrusion parameters are set as: 105°C in the first zone, 105°C in the second zone, the screw speed is 45HZ, cool and pulverize after extrusion to obtain flakes;
[0053] (3) Carry out vertical grinding to sheet material with coffee...
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Abstract
The invention discloses an environment-friendly HAA low-temperature-curing high-Tg high-toughness high-leveling ultra-weatherability powder coating which comprises, by mass, 60-70% of carboxyl polyester resin, 4.5-5.0% of HAA curing agent, 0.8-1.2% of leveling agent, 0.5-1.0% of degassing agent, 0.3-0.5% of antioxidant, 0.5-1.0% of brightener, 0.5-0.8% of dispersion aid, 0.5-0.8% of degassed wax, 0-4% of toughener and25-28% of weatherable pigment. The powder coating does not contain TGIC, is nontoxic, environment-friendly, low in curing temperature (160 DEG CX15min), high in storage stability, excellent in mechanical performance and high in distinctness of image, glossiness and leveling property, has good performance in resisting chemicals and resisting damp and heat and excellent ultra-weatherability and belongs to real environment-friendly energy-saving powder coatings.
Description
technical field [0001] The invention belongs to the field of chemical powder coatings, in particular to an environment-friendly HAA low-temperature curing high Tg high toughness high leveling super weather-resistant powder coating. Background technique [0002] Powder coating is a 100% solid powder that does not contain organic solvents. It is different from oil-based paints and water-based paints. It does not use solvent or water as a dispersion medium when coating, but uses air as a dispersion medium to evenly coat the workpiece. The surface is a new type of environmentally friendly paint that forms a special-purpose coating film after heating. Powder coating has the characteristics of no VOC, environmental protection, energy saving, high construction efficiency and wide application range. In recent years, low-temperature curing powder coatings have begun to emerge, especially for some thicker substrates and special substrates. [0003] At present, TGIC and HAA are the m...
Claims
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