Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1979-07-23
1981-04-28
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
C08L 9500
Patent
active
042643716
ABSTRACT:
A mix suitable for room temperature application which, on baking, forms a liquid-tight, electrically conductive seam between adjacent carbon blocks in an electrolytic cell for producing aluminum. The seam mix comprises carbon aggregate calcined to contain less than about 1.5% volatile matter, coal tar pitch or petroleum pitch binder, and an aromatic hydrocarbon solvent. A preferred composition of the seam mix has been found to exhibit less than two percent shrinkage upon heating to 950.degree. C.
REFERENCES:
patent: 3020220 (1962-02-01), Helling et al.
patent: 3576700 (1971-04-01), Dell
patent: 4167419 (1979-09-01), Dell
Aluminum Company of America
Klepac Glenn E.
Morris Theodore
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