PROCESS FOR THE PRODUCTION OF A MOLDED BODY COMPRISING PRESSED PARTICLES AND A PHENOLIC RESIN

摘要

In the process for the production of a molded body having a pressed core of solid inert particles which are coated with a thermoset phenolic resin, phenolic compounds on a basis of bisphenol, in particular a bis(hydroxyphenyl)alkane, and at least one compound which produces formaldehyde, and also a catalyst and optionally further additives customarily employed in the preparation of phenolic resins are mixed together with the inert particles The mixture of particles obtained, preferably after precompressing and preforming, is pressed to form the molded body. During pressing under the action of heat formaldehyde is set free and the phenolic resin is completely cross-linked.