The Universal Selection Source: Adhesives Ingredients

Epoxy
Epoxies are created by polymerizing a mixture of two starting compounds, the resin and the hardener. Epoxy adhesives are thermosetting resins which solidify by polymerization and, once set, will soften but not melt on heating. Two-part resin/hardener epoxy systems will solidify on mixing (sometimes accelerated by heat), while one-part epoxy adhesives require heat to initiate the reaction of a latent catalyst. The properties of epoxy adhesives are also varied through the use of fillers. Thanks to their versatility and relatively low cost, they find application in wide range of formulations.

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Mar 31, 2017 | Article

New Toughening Agents (Micro & Nano) for Structural Adhesives

By Edward M. Petrie

The two qualities required for high strength, creep and environmental resistant structural adhesives that unmodified resins often lack are flexibility and toughness. Formulators have overcome these...

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Feb 27, 2014 | Article

Two-part Epoxy-based Structural Adhesives

In one embodiment, the invention provides a two-part adhesive composition having a first part and a second part, the adhesive comprising a curable epoxy resin in the first part, an amine curing...

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Mar 20, 2013 | Article

Thermosetting Acrylic Structural Adhesives

By Edward M. Petrie

This article will attempt to characterize thermosetting acrylic adhesives as an important structural adhesive class. It will define their formulation parameters, their performance and processing...

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Jun 13, 2012 | Article

Selecting Organosilane Adhesion Promoters and Primers

By Edward M. Petrie

This article is intended to be a guide to the selection of an organosilane adhesion promoter or primer. The choice of the correct organosilane family or a type within a given family is often not a...

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Apr 4, 2012 | Article

Using Hyperbranched Polymers in Epoxy Thermosets

By Andy Extance

While thermoset epoxy adhesives are commercially successful their shrinkage on curing, toughness and reworkability could be improved. Hyperbranched polymers, large molecules with many functional...

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Feb 27, 2017 | Article

Bonding Solutions for Low Surface Energy Substrates

By Edward M. Petrie

Certain polymeric substrates, such as polyolefins, fluoropolymers, and silicone rubber are difficult to bond and present challenges to both the formulator and the end-user. The main reason that...

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Oct 8, 2013 | Article

PolyTHF-epoxy Increases Adhesive Oil-contamination Tolerance

Two researchers from 3M in DĂĽsseldorf, Germany, have formulated two-part epoxy-based adhesive compositions that can tolerate oil contamination that can otherwise lead to bond failure. In automotive...

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Sep 5, 2012 | Article

Selecting Curing Agents for Structural Epoxy Adhesives (Part 2): Elevated Temperature Cure

By Edward M. Petrie

This is the second part of two articles that describe common epoxy adhesive curing agents and their selection process. This current article focuses on epoxy adhesive systems that require elevated...

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May 14, 2012 | Article

Curing Agents for Epoxy Adhesives (Part 1): Low Temperature Cure

By Edward M. Petrie

This is the first part of two articles that will describe these common curing agents and their selection process. This current article focuses on low or room temperature curing epoxy adhesive...

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Jan 10, 2012 | Article

Attaching Hard-to-bond Construction Materials for Innovative Performance

By Andy Extance

Epoxy adhesives are the longest-used, best known and among the most common structural adhesives in general use. Polyurethanes are much more flexible, tough and elastic, which helps when adhesive...

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