Multifunctional epoxy Novolak resin for electrical insulations

Synthetic polymers like epoxies have both electrical properties and very high heat resistance. Multifunctional epoxies from polyhydroxy phenolic compounds emerge as an important addition to the field of resins. Research and development was undertaken and special types of Novolaks were synthesized from phenol and formaldehyde using acid catalyst. The intermediate Novolak was converted to multifunctional Epoxy Novolak by the general process of epoxidation. The resins obtained have low viscosities for use in casting and encapsulation applications. This paper highlights the production of Epoxy Novolak on pilot plant scale, evaluation of the resin, making products and evaluation of the products so developed.