Black, friable solid obtained by blowing air at high temperature through petroleum-derived asphalt with subsequent cooling. Penetration value 10–40, softening point 85 to 121C. Combustible.
Primarily roofing, as diluent in low-grade rubber products and as thickener in oil-based drilling fluids.
Asphalt, oxidized is a complex black solid obtained by blowing air through a heated residuum, or raffinate from a deasphalting process with or without a catalyst. The process is principally one of oxidative condensation which increases the molecular weight.
Flammability and Explosibility
Not classified
