| Hazard Information | Back Directory | [Chemical Properties]
A typical commercial novolak epoxy resin has an average molecular weight of
650 and contains about 3.6 epoxy groups per molecule. Because of their
multifunctionality, the novolak epoxy resins give, on curing, more tightly
cross-linked products than the bisphenol A-based resins. This results in
improved elevated temperature performance and chemical resistance. | [Definition]
NOVOLACEPOXYRESIN is a novolak epoxy resin | [Preparation]
Novolak resins are low molecular weight polymers consisting
of phenolic nuclei linked in the 0- and p- positions by methylene
groups. They may be epoxidized through the phenolic hydroxyl groups by
treatment with epichlorhydrin:
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