Process for the production of waterproof materials from waste paper containing bitumen and/or wax

Claim 1

A PROCESS FOR THE PREPARATION OF WATERPROOF SHEETING ARTICLES FROM FIBROUS CELLULOSIC MATERIALS WHICH COMPRISES: (1) COMBINING A STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) RAW MATERIALS COMPRISING TAR, BITUMEN AND/OR WAX-CONTAINING WASTE-PAPER; (B) MIXTURES OF FIBROUS CELLULOSIC WASTE MATERIALS FREE OF TAR, BITUMEN AND/OR WAX WITH AN APPROPRIATE SEPARATELY ADDED AMOUNT OF SAID TAR, BITUMEN AND/OR WAX; AND (C) MIXTURE OF (A) AND (B); WATER; AND A QUATERNARY AMMONIUM EMULSIFYING AGENT CONTAINING AT LEAST ONE PARAFFINIC HYDROCARBON CHAIN OF MORE THAN 10 CARBON ATOMS AND WHICH AGENT IS STABLE AT TEMPERATURES UP TO AT LEAST ABOUT 100*C. TO ABOUT 110*C. AND WHICH DECOMPOSES AT A TEMPERATURE ABOVE ABOUT 110*C. IN AN AMOUNT SUFFICIENT TO MAINTAIN A STABLE EMULSION DURING THE WHOLE SUBSEQUENT PROCESSING OF THE PULP; (2) MIXING TO OBTAIN A HOMOGENEOUS PULP; (3) PROCESSING THE PULP BY SHAPING AND DRYING TO OBTAIN SHEETLIKE ARTICLES THEREFROM; AND (4) SUBJECTING THE SHEETS SO OBTAINED TO A HEAT TREATMENT WHICH IS CARRIED OUT AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE EMULSIFYING AGENT.