Also known as DGEBA, it is the abbreviated name of Bisphenol A diglycidyl ether and constitutes the smallest compound in many types of epoxy resins.

  • Composites

    Materials made of two or more constituent materials combined to enhance performance and durability. Epoxies are often used as composites to strengthen and reinforce other materials such as steel, concrete, marble, glass or carbon fibres and widely used in wind farms, water pipes, automotive components and many other products.

  • Curing

    In chemistry, a process involving an energy-intensive reaction which cross-links polymer chains, usually aimed at creating hardened substances. Epoxies are created by curing epoxy resins with other substances called hardeners, or by reacting with themselves through a process of homopolymerisation.


    See BADGE.

  • Epoxide

    An organic compound containing two carbon and one oxygen atoms, connected to two alkyl or aryl groups. Epoxy resins always contain at least two epoxide groups. Epoxides are used to determine the amount of hardeners needed to cure the epoxy resin. In common language, epoxides are often referred to simply as epoxies

  • Epoxy or epoxies

    Epoxies are the resulting product of a chemical reaction called ‘curing’, which involves reacting epoxy resins with other chemicals known as ‘hardeners’. Together they create epoxy plastics. However, as resins are the most important component of epoxy plastics, in everyday language the term ‘epoxy resins’ is often used to refer to the end cured product as well as to the uncured resin. Epoxy is also often used to indicate an epoxide group, which is a chemical component found in epoxy resins.

  • Epoxy resins

    Epoxy resins are a class of prepolymers and polymers containing more than one epoxide group. The vast majority of epoxy resins are petroleum derivatives produced through industrial processing. Today, hundreds of epoxy resins are available, the most common produced with epichlorohydrin and Bisphenol A. They are also known as polyepoxides and are often used to designate cured epoxies, also called epoxy or epoxy plastic.

  • Epoxy system

    Multiple chemical components are needed to develop the end product epoxy. Epoxies are often available to small consumers as two-component systems, comprising an epoxy resin and a hardener. More complex, industrial systems can include multiple resins and other components.

  • Hardener

    They are the substances used to ‘cure’ epoxy resins to transform them into epoxy plastics. The most common hardeners for epoxy resins are amines, acids, acid anhydrides, phenols, alcohols and thiols.

  • Homopolymerisation

    Some epoxy resins are cured using a process of catalytic homopolymerisation, in which the epoxy resins are cross-reacted with themselves rather than with other chemicals. This process involves eliminating the reactions of the oxygen atom of the epoxide group using acid or base catalysts.

  • Low and high molecular weight

    The molecular mass of an element, depending on the sum of the mass of each atom multiplied by the number of atoms of the element in the molecular formula. Epoxy resins’ molecular weight ranges from low – a honey-like fluid at room temperature – to high –retaining a more solid form. Low and high molecular weight epoxies have different uses. The former are used in casting, coating and gap-filling glues, while the latter are usually found in paints and lacquers.

  • Polymer

    A large class of substances with a molecular structure composed of smaller molecules called monomers which are bonded together. In the case of epoxies, cross-linking epoxy resin (polymers or prepolymers) to create epoxies forms a thermosetting polymer with significant mechanical properties and high resistance. See also thermosetting polymer.

  • Powder coating

    Solvent-free coatings applied electrostatically and subsequently heated to form a protective layer over many objects for consumer or industrial use. Many epoxy-based powder coatings are used as ‘functional’ coatings to protect appliances such as ovens, fridges and washing machines to protect them from damage resulting from transport or installation or strong chemicals which may damage them internally or externally during cleaning.

  • Resins

    See epoxy resin.

  • Thermosetting polymer

    Polymers cured through heat-intensive reactions acquiring an irreversible solid or viscous state. Cured thermosetting polymers are called thermosets.