epoxy resins
A class of resins produced by the polymerization
of epichlorohydrin with diphenylolpropane, and
manufactured from phenol and acetone. A range of
resins of widely differing molecular weights,
e.g., 400 to 6,000, can be produced by varying the
proportions of reactants, as well as reaction
conditions. Epoxy resins possess exceptional
chemical resistance and adhesion. They are usually
supplied in two parts, which must be mixed before
use. Such resins have limited use equivalent
weight in conservation work; however, they are
useful where exceptional strength is required,
such as in corner rebuilding and box making. (235 , 309 )
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