Silvateam, a leading group in the production of tannins and in cooperation with researchers and technicians from around the world, has recently developed QSF. QSF is an innovative product specially designed for FNB resins (Furan No-Bake) and used in direct applications in the foundry industry.
QSF or soluble Quebracho is a natural product, soluble in polar solvents such as furfuryl alcohol and phenol (not more than 25% solids ratio) with a chemical structure similar to resorcinol, but with a greater responsiveness. QSF is a very versatile, easy to use and an eco-friendly product suitable for the manufacture of resins.
QSF is used as a main component of the binders in sand molds for no-bake applications.
As a resin, QSF develops excellent responsiveness when catalyzed with a sulphonic acid based both on water and alcohol. In fact, it is possible to obtain a strip time of fewer than 10 minutes. Good traction strength is obtained by applying the resin at low levels.
QSF is a reddish brown powder, totally biodegradable and sold in 20kg bags and 400kg big bags.