This standard specifies the terms and definitions, product classification, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality commitment of polybasic acid imidazoline matting curing agents. This standard applies to polybasic acid imidazoline salts formed by chemical synthesis using polybasic acids such as imidazoline and pyromellitic acid as starting materials, and used as matting curing agents for epoxy powder coatings or epoxy-polyester powder coatings.