Tar fraction for driveway sealers using oxidized coal tar distil

Details Tar fraction for driveway sealers using oxidized coal tar distil Tar fraction for driveway sealers using oxidized coal tar distil

1983-12-05

1985-08-27

Albrecht, Dennis L.

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

106281R, 106284, 2523115, C08L 9500, C09D 324, C10C 304

Patent

active

045376352

ABSTRACT:
A driveway sealer less affected by temperature extremes can be made from an oxidized coal tar distillation cut. The sealer incorporates a middle cut crude distillate which is oxidized to produce a product of desired viscosity. The sealer incorporating this oxidized middle cut is less affected by extremes in weather as compared to regular sealer tar. It has more consistent physical properties. A significant distinguishing characteristic derived from the use of this tar in a driveway sealer is the reduced odor of the resulting sealer. The oxidation (condensation) step is carried out at elevated temperature by sparging copious quantities of air rapidly into the tar at elevated temperatures of the order of about 300.degree. F. to 800.degree. F. (200.degree. C.-430.degree. C.).

REFERENCES:
patent: 3221615 (1965-12-01), McGovern
patent: 3304191 (1967-02-01), Barrett
patent: 3868263 (1975-02-01), McConnaughay
patent: 4052290 (1977-10-01), Cushman et al.
patent: 4139397 (1979-02-01), Yan
patent: 4222916 (1980-09-01), Hergenrother
patent: 4339346 (1982-07-01), Schulz
Chem. Abstr. 90:108672m, E. Voitkovskaya et al., vol. 90, p. 314 (1979).
Chem. Abstr., Fossil Fuels, 89:217849f, S. Furibata, vol. 89, p. 147 (1978).

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