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J-B Kwik (stylized as J-B KWIK) is a two-part epoxy, intended as an adhesive or filler, that can withstand medium-temperature environments (up to 300 °F or 149 °C). [14] J-B Kwik cures much more quickly, but it is not as strong or as heat-resistant as the original J-B Weld.
Curing can be induced by heat, radiation, electron beams, or chemical additives. To quote from IUPAC : curing "might or might not require mixing with a chemical curing agent". [ 1 ] Thus, two broad classes are curing induced by chemical additives (also called curing agents, hardeners) and curing in the absence of additives .
This setup compresses the FBE blend, while heating and melting it to a semi-liquid form. During this process, the ingredients of the molten mix are dispersed thoroughly. Because of the fast operation of the extruder and relatively low temperature within the barrel, the epoxy and hardener components will not undergo a significant chemical reaction.
They can be made flexible or rigid, transparent or opaque/colored, fast setting or slow setting. Epoxy adhesives are better in heat and chemical resistance than other common adhesives. In general, epoxy adhesives cured with heat will be more heat- and chemical-resistant than those cured at room temperature.
Left: individual linear polymer chains Right: Polymer chains which have been cross linked to give a rigid 3D thermoset polymer. In materials science, a thermosetting polymer, often called a thermoset, is a polymer that is obtained by irreversibly hardening ("curing") a soft solid or viscous liquid prepolymer (). [1]
Today the company also produces a fast-curing version of Pratley Putty called Pratley Quickset® Putty as well as a metallic-looking version called Pratley Steel Putty. Other products produced are epoxy, acrylic, cyanoacrylate, silicone, anaerobic and proprietary hybrid adhesives.