Waterborne polyester resin coating and preparation method thereof

Abstract

The invention discloses a waterborne polyester resin coating, which includes 6-8% of polyol, polyprotic acid and a catalyst, 2-6% of a curing agent, 4-8% of pigment, 2-6% of a filling material, 12-18% of a cosolvent and 40-80% of water. The polyol comprises 8-12% of trimethylolpropane, 12-24% of neopentylene glycol, 6-12% of glycol and 8-12% of propanediol. The polyprotic acid includes 5-15% of refined terephthalic acid, 12-24% of m-phthalic acid, 6-12% of phthalic acid, 10-18% of trimellitic anhydride, 6-12% of hexahydro-phthalic acid, 10-20% of maleic anhydride, and 5-10% of adipic acid. The waterborne polyester resin coating further includes 0.1-0.3% of 4-methoxyphenol, 6-24% of 2-butoxyethanol, 8-16% of dimethyl ethanolamine and 60-100% of deionized water. The hydrolytic stability of polyester main chains is improved, so that the aqueous insulating properties of the polyester resin coating are improved. The waterborne polyester resin coating can be widely applied to aqueous insulation devices, overcomes the defects in the prior art, and meets the actual use demand.

Description

technical field

[0001] The invention relates to a water-based polyester resin coating and a preparation method thereof, belonging to the technical field of synthetic coatings. Background technique

[0002] In recent years, water-based environmentally friendly coatings, including high-solid and solvent-free coatings, water-based coatings, powder coatings and radiation-cured coatings, have achieved rapid development. Water-based polyester coating, one of the representative water-based coatings, has the characteristics of high gloss, strong adhesion, high fullness, and excellent impact resistance. It can be formulated with water-soluble amino resin to make water-based baking paint, and can also be used Hydrophilic polyisocyanate is formulated into water-based wood coatings cured at room temperature, so it is widely used in the protection and decoration of metal and wood surfaces; because polyester is easy to hydrolyze, the application of water-based polyester is limited to a ce...

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