Process of producing roofing shingle coating asphalt

Details Process of producing roofing shingle coating asphalt Process of producing roofing shingle coating asphalt

2007-12-18

2010-12-28

Hill, Jr., Robert J (Department: 1774)

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

C106S270000, C106S285000

Reexamination Certificate

active

07857904

ABSTRACT:
A process of producing a roofing shingle coating asphalt from an asphalt feedstock includes the following steps. Wax and blowing catalyst are added to the asphalt feedstock. Then the asphalt feedstock is blown to produce the coating asphalt. The coating asphalt has a softening point within a range of from about 190° F. (88° C.) to about 235° F. (113° C.) and has a penetration of at least about 15 dmm at 77° F. (25° C.).

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