Coating processes – Restoring or repairing
Patent
1987-07-08
1988-11-22
Jacobs, Lewis T.
Coating processes
Restoring or repairing
427228, 524361, 524594, B32B 3500
Patent
active
047865245
ABSTRACT:
The described development is directed to a coating formulation for filling surface irregularities in graphite articles such as molds, crucibles, and matched die sets used in high-temperature metallurgical operations. The coating formulation of the present invention is formed of carbon black flour, thermosetting resin and a solvent for the resin. In affixing the coating to the article, the solvent is evaporated, the resin cured to bond the coating to the surface of the article and then pyrolyzed to convert the resin to carbon. Upon completion of the pyrolysis step, the coating is shaped and polished to provide the article with a surface restoration that is essentially similar to the original or desired surface finish without the irregularity.
REFERENCES:
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patent: 3671464 (1972-06-01), Gilchrist
patent: 3711428 (1973-01-01), Aycock et al.
patent: 3810780 (1974-05-01), Ardary et al.
patent: 3969124 (1976-07-01), Stewart
patent: 4298516 (1981-11-01), Taylor et al.
patent: 4410457 (1983-10-01), Fujimura et al.
Ardary Zane L.
Benton Samuel T.
Hamel Stephen D.
Hightower Judson R.
Jacobs Lewis T.
Larcher Earl L.
The United States of America as represented by the United States
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