Extruding thermosetting resins - eg polyesters with fibrous fillers to give stable profiles

Moulding materials consisting of a hardenable synthetic resin binder e.g. a polyester or epoxide resin, and fibrous, granulated or powdered fillers, solvent and accelerator being added if desired, are extruded through a screw extruder. The compsn contains 10-25% of resinous binder, pref. 15%, and is extruded without addn of heat in a partly hardened dimensionally stable form. Bars, rods, tubes and sheets can be made with good physical and chemical props. and at low cost because of the high filler content of the compsns. The resin is pref. added in solid form and rendered liq. by the addn of solvents. The fillers may be e.g. glass fibres or asbestos.