Coating processes – Heat decomposition of applied coating or base material – Coating decomposed to form metal
Patent
1993-11-23
1995-03-28
Bell, Janyce
Coating processes
Heat decomposition of applied coating or base material
Coating decomposed to form metal
427377, 4273855, B05D 302
Patent
active
054015359
ABSTRACT:
A homogeneous composition for forming on firing a film of precious metal, which is one or more of platinum, palladium, gold and silver, on a substrate, for instance to decorate table ware, comprises polymeric resin and a solution, in water and a co-solvent, of thiolate of the precious metal, the composition containing 3-22% by weight of the precious metal as the thiolate, and the co-solvent, resin and thiolate being such that as the composition on a substrate dries and is progressively heated in firing, the water evaporates off to leave a homogeneous composition of the resin and thiolate in the co-solvent, then the co-solvent evaporates off to leave a homogeneous composition of the thiolate in the resin, and then the thiolate decomposes to the precious metal while the resin volatilize.
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Bell Janyce
Johnson Matthey Public Limited Company
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