What Is Epoxy and How Is It Used in Construction?

Versatile, durable and with a remarkable level of heat resistance, epoxy adhesives can be used in almost any situation where you need to glue two materials together - think: to join subfloors, to bond a detail of a larger structure or to reinforce a fastener. They can be used with a variety of materials: wood, metal, plastic, masonry and more. Read on to learn what epoxies are and why they play an essential role in building. You can learn more about BGA underfill epoxy.

What is epoxy?

Epoxy is a type of polymer, a group of chemical compounds made up of large molecules with repeating subunits. The molecular structure of polymers gives them their toughness and elasticity, making polymers (both natural and man-made) ubiquitous in everyday life. Wool, rubber, styrofoam and epoxy are just some of the polymers you are probably already familiar with.

Epoxy resins include epoxides - highly reactive groups of molecules - that harden (or harden) through chemical reactions caused either by combining with other substances or by heating to a high temperature. This is the process by which an epoxy becomes "crosslinked" when strands of polymer form into a hardened structure.

Two types of epoxy adhesives

There are two main types of epoxy adhesives, one-part (or thermoset) and two-part epoxies. One-part epoxies cure faster, although they are often not as strong as two-part epoxies.

1. Thermoset Epoxies

Thermoset epoxies have many industrial uses but are not often used in construction due to the high heat requirements for their cure - even those that react at the lowest heat level must be exposed to temperatures of at least 200 degrees Fahrenheit.

With its remarkable resilience, epoxy is used in products ranging from electronic components and medical devices to infrared telescopes and missile warning systems.

2. Two part epoxies

With two-part epoxies, the two components needed to create the chemical reaction are packaged separately. When the resin (often referred to as "steel") is mixed with the hardener, the result turns from a thick liquid to a putty and finally to a fully cured and hardened material over the course of up to 24 hours. (To remove epoxy after curing, you will need to scrape it off and soften it first with alcohol or paint thinner if necessary.)

Like their heat cured counterparts, two-part epoxies have many industrial uses, including automotive, aerospace and other manufacturing, and are also particularly common in boat building. They are also used in building projects, applications including attaching countertops to substrates, attaching concrete elements to others, either also concrete or stone or metal, and attaching moldings in place.

Related info: https://www.epoxyadhesiveglue.com/bga-package-underfill-epoxy/