What's the difference between epoxy and polyester?
The difference between them is that the different functional groups, there are certain epoxy epoxy, phenolic hydroxyl and phenolic aldehyde condensation and bond, acrylic resin thermoplastic and thermosetting thermosetting epoxy for class two, the polymerization and curing amine anhydride, phenol is thermosetting, but sometimes alone, for example made phenolic paint
The epoxy resin is divided into several kinds of diglycidyl bisphenol, a variety of 7-8 kinds of bonding metal glass, generally double A, polyester is divided into saturated polyester and unsaturated polyester, and there is a vinyl resin containing bisphenol A link. You do the best to read the relevant information, it is very simple, not very complicated
Unsaturated polyester is an unsaturated carboxylic acid (anhydride or two yuan) and two yuan (or saturated carboxylic acid anhydride) composed of mixed acid and polyol condensation, the linear polymer with ester bond and unsaturated double bonds. In general, the polyester polycondensation takes place at 190~220 DEG C until the desired acid value (or viscosity) is reached. At the end of the polyester shrinkage reaction, a certain amount of vinyl monomer is added to the heat to form a viscous liquid. This polymer solution is called unsaturated polyester resin.
