ARALDITE® DY 023 is cresyl glycidyl ether (CGE). Liquid epoxy resins based on bisphenol A and epichlorohydrin are sometimes too viscous for certain applications. The viscosity of these liquid resins can be reduced by adding solvents, plasticizers, or reactive diluents. However, when formulating thick coatings, the use of solvents is not recommended because they cannot be completely driven off. Plasticizers are often unsuitable for electrical applications or where heat resistance is required. Reactive diluents are free-flowing, low molecular weight compounds (130–210) that participate in the curing reaction and significantly reduce the viscosity of the epoxy resin system. Although reactive diluents can affect the final properties of the cured resin/hardener system, they represent the best choice for viscosity reduction. ARALDITE® DY 023 is less volatile and exhibits good resistance to water. It can be added to epoxy resins in quantities of 2–20% by weight. Additions exceeding 20% can cause considerable deterioration of the cured system's properties.
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