Alkyd is a term used in the PCB industry to describe a type of resin that is commonly used for coating applications. It is a thermosetting resin that offers excellent electrical properties, making it suitable for molding the bodies of components. Alkyd resins are created through a condensation process involving a polyfunctional alcohol and a polyfunctional acid, typically a dibasic acid. These resins are further modified by reacting with fatty acids, which enhance their coating properties, such as flexibility.