FILLERS AND PIGMENTS POSSESSING ORGANIC POLYMER STABILIZING PROPERTIES AND A PROCESS FOR THEIR PREPARATION

摘要

"FILLERS AND PIGMENTS POSSESSING ORGANIC POLYMER STABILIZING PROPERTIES AND A PROCESS FOR THEIR PREPARATION". Stabilizing inorganic fillers or pigments having simultaneous reinforcing effect and stabilizing effect on organic polymers are obtained by a process comprising the following stages: a) bringing the inorganic filler or pigment, into contact with a solution, in an inert organic solvent, of a sterically hindered amine comprising one or more alkoxysilane groups in its molecule; b) maintaining the obtained mixture at higher than ambient, temperature (20-25.degree.C) for a period of at least 0.5 hours; c) removing the solvent, treating at a temperature of 120-200.degree.C and recovering the stabilizing filler or pigment obtained.