HE421S he bisphenol maʻamau A epoxy acrylate resin.Loaʻa iā ia nā hiʻohiʻona o ke aniani kiʻekiʻe, ka paʻakikī kiʻekiʻe, a me ka wikiwiki hoʻōla wikiwiki, ka meaʻO ia kekahi o nā resins kumu ma ke kahua UV.Hoʻohana nui ʻia ia i nā māla uhi UV like ʻole e like me ka electroplating bottoms, plastic coatings, inks, a me ka paʻi.