Water-vapor resistant coated paper

Claim 1

AS A NEW ARTICLE OF MANUFACTURE, A KRAFT PAPER SHEET HAVING AT LEAST ONE SIDE THEREOF COATED WITH A NON-INFUSED CONTINUOUS, FLEXIBLE, WATERVAPOR RESISTANT FILM OF A COATING COMPOSITION WHICH WITHSTANDS CREASING AND FOLDING WITHOUT RUPTURE OR CRACKING; RETAINS ITS FLEXIBILITY AT TEMPERATURES SUBSTANTIALLY BELOW SUB-ZERO; IS CHARACTERIZED BY EXCEPTIONALLY LOW WATER-VAPOR TRANSMISSION AND WITHSTANDING PROLONGED EXPOSURE TO WEATHER, FUMES AND ALCOHOL WITHOUT APPRECIABLE DETERIORATION AND IS NON-BLOCKING, SAID COMPOSITION CONTAINING AS ESSENTIAL BODY-FORMING CONSTITUENTS IN TOTAL AMOUNT AT LEAST ABOUT 99% BY WEIGHT OF THE COMPOSITION FORM 50% TO 80% OF ASPHALT MINERAL RUBBER PRODUCTS HAVING A MELTING POINT OF FROM 320*F. TO 350*F., FROM 10% TO 25% OF A COUMARONE INDENE RESIN CONSISTING OF A MIXTURE OF POLYMERIZED COUMARONE AND POLYMERIZED INDENE, SAID COUMARONE AND INDENE OBTAINED FROM SOLVENT NAPHTHA FRACTIONS OF COAL TAR AT 280*F. TO 340*F., FROM 2% TO 10% OF A ROSIN PLASTICIZER SELECTED FROM THE GROUP CONSISITING OF METHYL ESTER OF ROSIN AND HYDROGENATED METHYL ESTER OF ROSIN, FROM 4% TO 7% OF PARAFFIN WAX HAVING A MELTING POINT BETWEEN 122*F. AND 150*F.