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The resin and hardener part together is known as the "Binder". As the name indicates, in Fusion bonded epoxy coatings the resin part is an "epoxy" type resin. “Epoxy” or “Oxirane” structure contains a three membered cyclic ring — one oxygen atom connected to two carbon atoms – in the resin molecule. This part is the most reactive ...
Various epoxy resin systems have been formulated as varnishes or floor finishes whereby two components are mixed directly before application. [18] Sometimes, the two parts are of equal volume and referred to as 1:1 but not always, as 2:1, 3:1, 4:1 and even 5:1 mixing ratios are commercially available.
Dicyclopentadiene (DCPD) is also a common UPR raw material, and can be incorporated two different ways. In one process, the DCPD is cracked in situ to form cyclopentadiene which can then be reacted with maleate/fumarate groups along the polymer chain via a Diels-alder reaction. This type of resin is known as a Nadic resin and is referred to as ...
In other cases the coating adds a completely new property, such as a magnetic response or electrical conductivity (as in semiconductor device fabrication, where the substrate is a wafer), and forms an essential part of the finished product. [4] [5] A major consideration for most coating processes is controlling coating thickness.
The term alkyd is a modification of the original name "alcid", reflecting the fact that they are derived from alcohol and organic acids. [2] The inclusion of a fatty acid confers a tendency to form flexible coatings. Alkyds are used in paints, varnishes and in moulds for casting. They are the dominant resin or binder in most commercial oil ...
These early fillers were epoxy-based and one-part, drying by outgassing. Originally, the plastic fillers performed badly compared to solder, but later improvements addressed this. [7] Bondo, a two-part mix (resin with hardener added) of talc and plastic, was introduced in 1955. [7]