UPR
unsaturated polyester resin
You can define the polyester resin as a polymer obtained by the polycondensation reaction between polyacids and polyalcohols. The development of water is the by-product of this polycondensation process. Specifically, the unsaturated polyester resin, also known by the English acronym UPR, is an easily printable liquid polymer which, once cured (cross-linked with styrene, by the use of particular substances, organic peroxides, named hardeners), keeps the solid shape taken in the mold......
paint & coating
Industrial coatings appear everywhere. They protect a diverse array of products from corrosion, wear and tear and decay, as well as bringing an aesthetic and colorful appearance to the coated surface or product
GUIDED TOUR
alkyd resins
Since the mid-20th century, many authors and documentaries have argued that the curse is 'real' in the sense of being caused by scientifically explicable causes such as bacteria or radiation.