Introduction
Coal Tar pitch is a dark-brown to black amorphous residue left after coal tar is redistilled. It is composed almost entirely of polynuclear aromatic compounds and constitutes 48–65% of the usual grades of coal tar.
Different grades have different softening points: roofing pitch softens at 65C, electrode pitch at 110–115C.
Hazard: Combustible. Volatile components (anthracene, phenanthrene, acridine) are carcinogens. TLV: 0.2 mg/m3.
Uses: Binder for carbon electrodes, base for paints and coatings. Impregnation of fiber pipe for electrical conduits and drainage, foundry core compounds, briquetting coal, tar-bonded refractory brick, paving and roofing, plasticizers for elastomers and polymers, extenders, saturants, impregnants, sealants.
Specification
Coal Tar Pitch is available in Medium and High Temperature grades; and a “Grade Z” that has a softening point between 110-115 degress Celcius.
