METHOD OF PRODUCING ROOFING SHINGLE COATING ASPHALT FROM NON-COATING GRADE ASPHALT

A method of producing a roofing shingle coating asphalt from a non-coatin g grade asphalt feedstock includes the following steps. The non-coating grad e asphalt feedstock is partially blown to lower its penetration to a first p enetration that is within or close to a target penetration range of the...

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Bibliographische Detailangaben
Hauptverfasser:	TRUMBORE, DAVID C, GUERRA, JASON D
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS FUELS LUBRICANTS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PEAT PETROLEUM, GAS OR COKE INDUSTRIES PYROLIGNEOUS ACID TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Beschreibung
Zusammenfassung:	A method of producing a roofing shingle coating asphalt from a non-coatin g grade asphalt feedstock includes the following steps. The non-coating grad e asphalt feedstock is partially blown to lower its penetration to a first p enetration that is within or close to a target penetration range of the coat ing asphalt, and to raise its softening point to a first softening point tha t is lower than a target softening point range of the coating asphalt. Then a wax is added to the partially blown non-coating grade asphalt to further r aise its softening point to a second softening point that is within the targ et softening point range to produce the coating asphalt.