4,4'-Oxydianiline,high purity,heat endurance,white blocky (or powder)crystalloid. Feature:·raw ... , polyester-imide resin·heat endurance epoxy resin·raw material and crosslinking agent for high molecular compound like polyurethane, etc.Product standard:Appearance:White ... °C.Depending on the requirement of small size, light weight, high reliability and long service time of electric equipment, and the ...