Low-gloss curing agent MB-68( also known as Hardener MB68) is a salt of organic polycaroxilic acid with a cyclic amidine. 1. Characteristics Appearance: Fine powder( white) Melting Range: 210-230 Purity: > = 99.5% 2. Application Low-gloss curing agent MB-68 for epoxy resins and epoxy polyester hybrid powder coatings is used to achieve coatings with matt surface having excellent mechanical quality and wonderful reappearance.