!!!
"Amines and amine derivatives are the most diverse group of epoxy curing
agents. The fully polymerized epoxy resins exhibit a very wide range of
thermal and mechanical properties. Though other classes of compounds (e.g.,
anhydrides, phenolic resins and Lewis acids) are used as hardeners for some
applications, the breadth of performance imparted by amine hardeners is
unmatched. This paper provides an overview of the wide variety of amine
hardeners, including several recent developments that can expand the
capabilities of epoxy formulators into new applications.
History
Amine compounds were among the earliest reactants used with epoxy resins to
produce useful products. As epoxy resins became more widely available
following their development and commercialization in the late 1940s and
mid-1950s, utilization of an ever-wider variety of amine compounds ensued.
Because most amines are reactive at room temperature with epoxy resins, such
formulations are typically provided as two separate parts (or "sides"),
which are mixed just prior to application.
Though a variety of epoxy resin products are commercially available, liquid
resins based on the diglycidyl ether of bisphenol A (also termed DGEBA or
BADGE type resins) have the widest use and availability due to their
relatively low price, which is partially gained from economies of scale.
Because of this, the epoxy portion of epoxy formulations often remains
relatively fixed, and most variations in processing and performance are
obtained by making changes to the hardener side of the formulation. The wide
variety of commercially available amine compounds and decades of study and
formulation have helped to make this group of hardeners the most versatile
and widely used of any epoxy reactants."
----- Original Message -----
From: "Ted Waltman" <ted@vafm.org>
To: <rebel-builders@dcsol.com>
Sent: Thursday, November 24, 2011 9:33 PM
Subject: [rebel-builders] EP420
I looked up EP420 on Aircraft Spruce. It says it is "anime cured" in the
description. I spent 5 trying to find out what that means. Anyone know?
Thank you!
Ted
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