Patent No. U.S. 7,223,477 B2
Alpha Coating Technologies has received a patent for a powder coating having a low curing temperature and good flexibility in the coated and cured condition comprised of an acid functional acrylic resin having an acid number between approximately 40 and 220 and a polyester resin, the acrylic resin and the polyester resin being present in a weight ratio between 30 parts acrylic resin to 70 parts polyester resin to 70 parts acrylic resin to 30 parts polyester resin, an epoxy functional crosslinking agent having an epoxy equivalent weight between 100 and 1,000, and a curing catalyst, the coating powder has a stoichiometry of acid groups to epoxy groups of between 0.5 and 2.0.