The most common epoxy resins are produced from a reaction between epichlorohydrin (ECH) and bisphenol-A (BPA), although the latter can be replaced by other starting materials (such as aliphatic glycols, phenol and o-cresol novolacs) to produce special resins. Epoxy resins can be obtained in the liquid or solid state. Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers that contain epoxy groups.
The epoxy functional group is also collectively referred to as epoxy. The IUPAC name for an epoxide group is oxirane. Epoxy resins are thermosetting polymers with unique strength and mechanical properties. They are the result of a chemical reaction called “curing”, involving epoxides and other chemicals more commonly known as “hardeners” or curing agents.
A number of substances can be used as hardeners, including polyamines, aminoamides, or phenolic compounds. Epoxy, also known as polyepoxide, is a polymer used to create protective coatings, fillers, and scratch resistant adhesive products for a variety of applications. epoxy resin is viscous when in liquid form, cures quickly and adheres to a wide range of substrate materials, such as wood, metal, glass, concrete and stone. In its most basic form, epoxy is composed of a liquid epoxy resin and a chemical hardener that cures the resin in hardened plastic.
Once hardened, epoxy is extremely strong, dimensionally stable and resistant to chemicals. Epoxy resins are a class of thermosetting polymers made of monomers containing at least two epoxy groups. Provides strong adhesion, chemical resistance and other specialized properties. Because of these qualities, epoxy resins are used in a variety of industrial and consumer products.
Epoxy is an organic compound formed by carbon chains attached to other elements such as hydrogen, oxygen or nitrogen. This bond occurs through a covalent bond, in which the elements share a pair of electrons to stay together. Epoxies are typically cured with stoichiometric or near stoichiometric amounts of hardener to achieve the best physical properties. Electric generators, connected via transmission to the rotor blades, convert mechanical wind energy into usable electrical energy and rely on the electrical insulation of epoxies and high thermal resistance properties.
Workers may be exposed to uncured epoxy resins if they are improperly protected or are not handling epoxies with the right tools. The use of epoxies in vehicles can also help reduce the weight of automotive components, helping to improve fuel efficiency and reduce CO2 and other emissions. However, if used in higher proportions as reactive diluents, this often leads to reduced chemical and thermal resistance and poorer mechanical properties of cured epoxides. Epoxies are not normally used in the outer shell of a ship because they deteriorate from exposure to ultraviolet light.
Epoxies are sold in hardware stores, usually as a separate package containing resin and hardener, which must be mixed immediately before use. Although casting and coating epoxies have similar characteristics, it is important to select the epoxy resin that best suits the material and application. The first thing to know is that epoxy is a colloquial name for the epoxy functional group or any of the basic components or cured end products of epoxy resins. Glass containers, such as those used for canning food, also often rely on epoxies to protect metal lids from corrosion.
Epoxies are also used in decorative and high-performance floors, such as terrazzo floors, chips, and color aggregates, and can improve the aesthetic appeal of materials such as marble. The reaction of polyepoxides with themselves or with polyfunctional hardeners forms a thermosetting polymer, often with favorable mechanical properties and high thermal and chemical resistance. Epoxies generally outperform most other types of resins in terms of mechanical properties and resistance to environmental degradation, leading to their almost exclusive use in aircraft components. Because of their ability to adhere to a wide variety of materials, their high strength, their resistance to chemicals and environments, and their ability to withstand creep under sustained load, epoxies are the most commonly used structural adhesives.
In principle, any molecule containing a reactive hydrogen can react with the epoxy groups of the epoxy resin. Paul Schlack from Germany first reported and patented the condensation of epoxides and amines in 1934. .