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Epoxy Resins and Epoxy Hardeners
Epoxy Resins:
Most common epoxy
resins are produced from a reaction between epichorohydrin & Bisphenol
A. Other materials can become part of the reaction yielding Bis F resins,
Novolac
resins, and multifunctional resins.The
reaction product is high in viscosity and can either undergo further reaction
processes to yield a lower viscosity resin.
Epoxy resins are often modified using other products to improve some measured
property of the final product such as toughness or tensileness. Epoxy resins
and their additives contribute to the viscosity of the system and to the
shrinking characteristics.The amount of the fillers and diluents will impact
both the physical and handling properties of the resin system. Epoxy resins
are part of a two-component thermo-set plastic that requires an epoxy hardener
to determine the majority of the handling and physical properties of the
base.The use of several variations of unmodified and modified epoxy resins
with the same epoxy hardener will produce some variations in their properties;
however, the epoxy hardener is the primary factor in the base property.
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