15247 IUPAC Gold Book - epoxy polymer 10.1351/goldbook.15247 15247 current 1 Polymer prepared by reaction of compounds carrying two or more epoxy groups (reactive epoxides) with curing agents. The reactive epoxides are commonly prepared by condensation of (chloromethyl)oxirane (commonly called epichlorohydrin) with a di- or multi-functional acid, alcohol, amine, or phenol, most often with 4,4′-(propane-2,2-diyl)diphenol (bisphenol A) to give in this case: The reactive epoxide is cured by reactions with a di- or higher-functional amine, carboxylic acid, anhydride, or dicyandiamide (i.e., cyanoguanidine). A reactive epoxide or a mixture of reactive epoxides, and also its admixture with curing agent or agents, is usually referred to as an epoxy resin, particularly in a public (popular) use and technological practice. Use of the term "epoxy resin" for a cured epoxide is discouraged; it should be named "epoxy polymer". PAC, 2009, 81, 1131. 'Glossary of class names of polymers based on chemical structure and molecular architecture (IUPAC Recommendations 2009)' on page 1136 (https://doi.org/10.1351/PAC-REC-08-01-30) https://goldbook.iupac.org/terms/view/15247/html https://goldbook.iupac.org/terms/view/15247/json https://goldbook.iupac.org/terms/view/15247/plain Citation: 'epoxy polymer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.15247 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-21T02:16:44+00:00