Polyester/GMA powder coating

The invention discloses a polyester/GMA powder coating and relates to the technical field of powder coatings. The powder coating comprises a co-reaction additive being aromatic acid anhydride. In thepolyester/GMA powder coating, the co-reaction additive itself is also a curing agent and is added to a carboxyl group-containing polyester/GMA powder coating so that the co-reaction additive can be crosslinked with GMA resin as a co-reactant of carboxyl group-containing polyester resin to form a film. Therefore, the powder coating composition with extremely low gloss, excellent outdoor durabilityand polishing resistance is obtained, the scratch resistance and polishing resistance of an existing polyester/GMA powder coating are effectively improved, and the polyester/GMA powder coating is easyand convenient to produce and process and has no toxic and harmful ingredients. 本发明公开了种聚酯/GMA粉末涂料，涉及粉末涂料技术领域，所述粉末涂料含有共反应添加物，所述共反应添加物为芳香族酸酐。本发明中共反应添加物本身也是种固化剂，将其添加到含羧基聚酯/GMA粉末涂料中，其可以作为含羧基聚酯树脂的共反应物和GMA树脂交联而成膜，从而得到种具有极低光泽、极好的户外耐久