coal-tar pitch


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coal-tar pitch

[′kōl ¦tär ‚pich]
(materials)
Dark-brown to black amorphous residue from the redistillation of coal tar; melts at 150°F (66°C); used as a thermoplastic.

coal-tar pitch, tar

A dark brown to black hydrocarbon obtained by the distillation of coke-oven tar; softening point near 150°F (65°C); used in built-up roofing as a waterproofing agent.