Epoxy
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 which contain epoxide groups. The epoxide functional group is also co ...
putty refers to a group of room-temperature-hardening substances used as space-filling adhesives. Exact compositions vary according to manufacturer and application. They are stored until used as two components of clay-like consistency. Kneading the two components into each other creates an
exothermic
In thermodynamics, an exothermic process () is a thermodynamic process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity ...
chemical reaction that activates the substance for use by catalyzing an
epoxide
In organic chemistry, an epoxide is a cyclic ether () with a three-atom ring. This ring approximates an equilateral triangle, which makes it strained, and hence highly reactive, more so than other ethers. They are produced on a large scale ...
polymerisation reaction. Unlike many other types of glues, an
epoxy
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 which contain epoxide groups. The epoxide functional group is also co ...
adhesive can fill gaps and even be
molded
Molding (American English) or moulding (British and Commonwealth English; see spelling differences) is the process of manufacturing by shaping liquid or pliable raw material using a rigid frame called a mold or matrix. This itself may hav ...
into a structural part. Some makers claim in advertising that one can drill and tap their cured products and that they quickly cure "hard as steel" (as measured by
Shore rating), though they are much weaker than steel in
tensile strength
Ultimate tensile strength (UTS), often shortened to tensile strength (TS), ultimate strength, or F_\text within equations, is the maximum stress that a material can withstand while being stretched or pulled before breaking. In brittle materials ...
and
shear strength
In engineering, shear strength is the strength of a material or component against the type of yield or structural failure when the material or component fails in shear. A shear load is a force that tends to produce a sliding failure on a materi ...
.
Epoxy putty is often used by miniature modelers and sculptors. Modelers use it to join disparate parts into a whole with the joins covered by molded putty, often shaped into protrusions or textures to match their surroundings. The most common variety of epoxy putty used in modeling has its component clays colored yellow and blue, respectively, and the mixed, hardened end product is green. This has given rise to the colloquial name green stuff for epoxy putty.
See also
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Putty
Putty is a material with high plasticity, similar in texture to clay or dough, typically used in domestic construction and repair as a sealant or filler. Although some types of putty (typically those using linseed oil) slowly polymerise and be ...
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Milliput
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Pratley Putty
External links
Megastick Epoxy PuttyHow to Glue Styrofoam to Various Surfaces
Adhesives
it:Colla epossidica
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