Coated stabilized cadmium chalcogenide pigments

Details Coated stabilized cadmium chalcogenide pigments Coated stabilized cadmium chalcogenide pigments

1975-10-06

1978-06-06

Ives, P. C.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428404, 428407, 428448, 428450, 428451, 428538, 427215, 427218, 427219, B32B 904

Patent

active

040937771

ABSTRACT:
A stabilized cadmium chalcogenide, in which optionally zinc and/or mercury is present in the lattice, carrying at least one coating of a sparingly-soluble sulfide is produced by adding at least one water-soluble salt of an element forming a sparingly-soluble sulfide to an aqueous chalcogenide suspension, mixing with a compound releasing sulfide ions and/or mixing the cadmium chalcogenide suspension with a soluble thio-compound of an element forming a sparingly-soluble sulfide thereby to precipitate a sparingly-soluble sulfide onto the chalcogenide, subsequently filtering, optionally washing, drying and annealing the aftertreated chalcogenide. Suitable sparingly-soluble sulfides are, for example, the sulfides of the elements Zn, Hg, In, Sn, Pb, As, Sb, Bi, V, Mo, W, Cu and Ag.

REFERENCES:
patent: 2003849 (1935-06-01), Alton
patent: 2326984 (1943-08-01), Tomlin
patent: 3309215 (1967-03-01), Brader, Jr. et al.
patent: 3362846 (1968-01-01), Lee et al.
patent: 3652327 (1972-03-01), Hill, Jr. et al.
patent: 3904409 (1975-09-01), Hanada et al.

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