Extinction powder coating and preparation method thereof

The invention relates to the technical field of powder coatings, in particular to a matting powder coating and a preparation method thereof.The matting powder coating is prepared from 25-30 parts of semi-crystalline carboxyl polyester resin, 25-30 parts of random carboxyl polyester resin, 3-10 parts of low-functionality curing agent blend and 30-40 parts of pigment filler and/or other auxiliaries. Wherein the curing agent blend is a curing agent with low functionality, contains a beta-hydroxyalkyl amide compound and a glycidyl ester compound, and is characterized in that the apparent functionality of the original beta-hydroxyalkyl compound is reduced. The extinction powder coating containing the low-functionality curing agent blend has the characteristics that the gloss is stable, and the floating defect is improved. 本发明涉及粉末涂料技术领域，具体涉及一种消光粉末涂料及其制备方法，本发明的消光粉末涂料包含半结晶羧基聚酯树脂25～30份、无规羧基聚酯树脂25～30份、低官能度固化剂共混物3～10份、颜填料和/或其他助剂30～40份。其中，所述固化剂共混物是一种低官能度的固化剂，包含β-羟烷基酰胺类化合物和缩水甘油酯类化合物，其特征是降低了原β-羟烷基化合物的表观官能度。本发明中包含所述低官能度固化剂共