A copolyester resin having modified termini is disclose, as well as the method for making and using that compound in subsequent reactions with epoxide curing compounds. The polymerization of the copolyester resin may include a compounding preparation stage for modifying the termini of the copolyester resin by reacting those and groups with an aromatic acid to alter the activation energy necessary to cure the modified copolyester resin with the epoxide compound upon mixing and heating of that mixture in a powder coating upon a substrate. The modified copolyester resin improves impact strength and leveling properties between 300 and 450 F, which is desirable for protection of the underlying substrate.
本发明公开了一种具有改性端基的共聚酯
树脂,以及在随后与环氧固化化合物的反应中制造和使用该化合物的方法。共聚聚酯
树脂的聚合过程可包括一个混料制备阶段,通过使共聚聚酯
树脂的端基和基团与芳香族酸反应来改性共聚聚酯
树脂的端基,以改变改性共聚聚酯
树脂与
环氧化物化合物混合固化所需的活化能,并将混合物加热成粉末涂料涂在基材上。改性共聚酯
树脂可提高冲击强度和 300 至 450 华氏度之间的流平性能,这对于保护底层基材是非常理想的。