Application of Glycidyl Methacrylate GMA in Powder Coatings

Application of Glycidyl Methacrylate GMA in Powder Coatings

Acrylic powder coatings are a large category of powder coatings. According to the different curing agents used, they can be divided into: hydroxyl acrylic resin, carboxyl acrylic resin, glycidyl acrylic resin, and amido acrylic resin. Among them, glycidyl acrylic resin is the most used powder coating resin, and can be film-formed with curing agents such as polyhydroxy acids, polyamines, polyols, polyhydroxy resins, and hydroxy polyester resins.

Methyl methacrylate, glycidyl methacrylate, butyl acrylate, and styrene are usually used for free radical polymerization to synthesize GMA type acrylic resins. Dodecyl dibasic acid is used as a curing agent. The prepared acrylic powder coating has good performance. Benzoyl peroxide (BPO) and azobisisobutyronitrile (AIBN) or their mixtures can be used as initiators in the synthesis process. The amount of GMA has a great influence on the performance of the coating. If the amount is too small, the crosslinking degree of the resin is low, the curing crosslinking points are few, the crosslinking density of the coating is insufficient, and the impact resistance of the coating is poor.