Novel waterborne polyester resin

Abstract

The invention discloses a novel waterborne polyester resin. The resin is prepared from the following raw materials in parts by mass: 2-10 parts of a flatting agent, 3-7 parts of neo-pentyl glycol, 1-5 parts of polymer emulsion, 10-14 parts of hexahydrophthalic acid, 1-3 parts of maleic anhydride, 2-4 parts of trimellitic anhydride, 2-6 parts of adipic acid, 1-3 parts of p-methoxyphenol, 10-12 parts of a base material wetting agent, 2-6 parts of dimethyl ethanol amine, 1-3 parts of a dry crosslinking enhancer, 1-4 parts of a wetting dispersant, and 50-60 parts of deionized water. The novel waterborne polyester resin prepared by the invention has excellent hydrolysis resistance, water dispersibility and storage stability. The novel waterborne polyester resin has the characteristics of high gloss, good wear resistance, strong adhesive force, high fullness, excellent impact resistance and the like no matter the novel waterborne polyester resin and water-soluble amino resin are prepared into water-based metal baking paint or hydrophilic polyisocyanate are prepared into normal-temperature cured water-based wood paint. The waterborne polyester resin is widely applied to surface coating and protection of products such as woodware, metal, zinc alloy, aluminum alloy, magnesium alloy and plastic.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a novel water-based polyester resin. 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. [0003] Using trimellitic anhydrid...

AI Technical Summary

Problems solved by technology

Introducing trimellitic anhydride as a self-emulsifying functional group on the main chain of polyester is a common method, but the half-e