Tagging and identifying asphalt additives

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

Patent

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Details

1062731, 106275, 1062811, 106622, 106712, 106823, 106DIG7, 524 61, 524 64, 252393, 26099819, C04B 2402

Patent

active

053063430

ABSTRACT:
A tag is added to an asphalt additive, typically an anti-stripping agent. The additive dye is mixed with other components of an asphalt composition and melt processed at 300.degree. F. (149.degree. C.) or above to produce an asphalt composition. Presence of the tag to identify presence of the additive is performed by dissolving the asphalt portion of the composition in a water-immiscible solvent and then extracting the tag in an acidic aqueous solution and developing a color with a diazo compound.

REFERENCES:
patent: 2386867 (1945-10-01), Johnson
patent: 4209302 (1980-06-01), Orelup
patent: 4430127 (1984-02-01), Dalter et al.
patent: 4639273 (1987-01-01), Gilmore et al.
patent: 4743304 (1988-05-01), Gilmore et al.
patent: 4775419 (1988-10-01), Gilmore et al.
patent: 5037474 (1991-08-01), Mesch et al.

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