Composition and method for applying metallic silver to a substra

Details Composition and method for applying metallic silver to a substra Composition and method for applying metallic silver to a substra

1976-06-07

1978-07-25

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

427437, C23C 302

Patent

active

041027027

ABSTRACT:
High efficiency deposition of silver on the surface of a substrate is obtained by providing a solution containing reducible dissolved silver in the presence of an alkali metal hydroxide and ammonia, all of which are applied to the substrate in the presence of an aqueous solution of a moderating reducer containing a polyhydric alcohol of the formula CH.sub.2 OH(CHOH).sub.n CH.sub.2 OH, where n is an integer from 1 to 6. Preferably the polyhydric alcohol is sorbitol, and in a preferred embodiment a moderator is the form of a thio glycerol is present.

REFERENCES:
patent: 2273613 (1942-02-01), Bartoe
patent: 2689191 (1954-09-01), Pessel
patent: 3772078 (1973-11-01), Polichette et al.
patent: 3960564 (1976-06-01), Molenaar et al.
Ivanov et al., Chem. Abs., 43:2548c, 1949.

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