Reactive building blocks for thermoset adhesives, coatings, and composites u2014 bisphenol A, DGEBA liquid epoxy resin, and ethylene glycol resin intermediate u2014 supplied for bulk formulation.
Epoxy and resin intermediates are the reactive building blocks thatnformulators convert into thermoset adhesives, sealants, coatings, and compositenmatrices. The core pair is bisphenol A (BPA, CAS 80-05-7) and the liquidnepoxy resin it forms, bisphenol A diglycidyl ether (DGEBA, CAS 25068-38-6): BPAnreacts with epichlorohydrin to make DGEBA, which then cures with an amine ornanhydride hardener into a crosslinked network. Specify DGEBA grade by epoxynequivalent weight (EEW) so it matches your hardener stoichiometry.
nnDGEBA is the workhorse liquid epoxy; standard grades run an EEW near 182-192 g/eq,nwhich sets how much hardener each batch needs. The genuine trade-off sits with BPAnitself. It delivers the rigidity, adhesion, and chemical resistance epoxy buyersnexpect, but it carries regulatory scrutiny that bio-based or novolac alternatives donnot. Where that scrutiny matters for your end use, qualify an alternative early; wherenperformance and cost rule, BPA-based DGEBA stays the default. Confirm regulatorynstatus for your application and jurisdiction.
nnEthylene glycol (CAS 107-21-1) is the polyester-resin and glycol intermediate innthis group, not an epoxy reactant. It serves as a diol for unsaturated polyester andnalkyd resins and as the base for heat-transfer and antifreeze fluids. Buyers oftennsource it alongside epoxy feedstocks for the same adhesive, composite, or process-fluidnprograms. Match grade to the end use rather than defaulting to one specification.
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