Asbestverstärkte Phenolharze als Werkstoffe für den chemischen Apparatebau

Asbestos-phenolic resin laminates as primary materials of construction for chemical plant and equipment The application potential of asbestosphenolic resin laminates is determined by their processing properties which are favourably influenced e.g. by chrysotile fibres, or by the chemical resistance which is obtained by another species of asbestos, crocidolite, which is also used for acid resistant packings. The combination of these fibres and special phenoplastic materials has yielded materials which can be machined like wood and which can therefore be used for a number of applications. Some examples are stirrers for reaction vessels, tube components and tubes with moulded-on flanges, container lids, valves, stopcocks, pumps. The chemical resistance of the resin can be increased considerably by curing at high temperature and pressure. The resins are also completely resistant to solvents at practically any admissible working temperature. The resistance to sulfuric acid extends to 90°C, above that temperature and - in fuming acid at room temperature - the resin is sulfonated.