Compositions: coating or plastic – Coating or plastic compositions – O-containing organic compound
Patent
1997-06-09
1998-12-22
Brunsman, David
Compositions: coating or plastic
Coating or plastic compositions
O-containing organic compound
588255, 588256, A62D 300
Patent
active
058512780
ABSTRACT:
The present invention involves a method of removing paint containing heavy metal from a surface without the production of hazardous wastes. Specifically, this method involves applying a coating preparation to the heavy metal containing paint prior to its removal from its surface. The preparation contains lead reactive chemicals such as phosphates, metal sulfides and organic sulfides. The preparation may also contain buffers such as magnesium oxide and magnesium hydroxide. These chemicals react with the heavy metals rendering them nonhazardous. The invention also involves the coating preparation itself.
REFERENCES:
patent: 5637355 (1997-06-01), Stanforth et al.
patent: 5667696 (1997-09-01), Studer et al.
Murray, CA 113:9016, Corrosion inhibitor containing . . ., Apr. 19, 1990.
Doi et al, CA 82:100198, "Coating with inorganic paint" Aug. 17, 1974.
Rajagopalan et al, CA 106:142011. "Chemical phosphating of ferrous substrates" Jul. 12, 1986.
Demchenko et al, CA 81:126154, "Phosphate composition" Jul. 27, 1973.
Kulchinskaya et al, CA 89:219148, "Solution for phosphating. . . " Sep. 25, 1978.
Schafer, CA 93:224483, "Metal surface treatment" Jul. 23, 1980.
Knopp Paul V.
Stanforth Robert R.
Brunsman David
RMT, Inc.
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