New diallyl phthalate resins for low pressure molding encapsulation of electronic components

The allylic resins are well known among thermosets for their excellent electrical characteristics and in particular for their ability to retain these properties under adverse environmental conditions. Properties are little affected on prolonged exposure to high temperatures, moisture and aqueous and organic chemical media. Allylic resins are supplied commercially as prepolymers which, when filled with appropriate minerals and reinforcing fibers, serve as the basis for a series of molding compounds. They are also used as electrical, structural and decorative laminates.