Preparation of colloidal cobalt dispersions by the polymer-catal

Details Preparation of colloidal cobalt dispersions by the polymer-catal Preparation of colloidal cobalt dispersions by the polymer-catal

1979-12-04

1981-02-24

Niebling, John F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

260 4222, 430286, 430945, 568451, 568455, 568454, B01J 3102, C08K 308

Patent

active

042526736

ABSTRACT:
There is disclosed a method for the preparation of a homogeneous, physically stable colloidal elemental cobalt dispersion of colloidal cobalt particles having a size in the range of from about 10 Angstrom units to about 200 Angstrom units. The method comprises preparing a solution of an active polymer in an inert solvent, and incrementally adding thereto a cobalt precursor, at a temperature at which the cobalt precursor will become bound to the active polymer and thermally decompose to produce elemental cobalt particles, the process being carried out in an inert atmosphere. Such dispersions may be used per se as catalysts, or may be used for the preparation of supported colloidal cobalt catalysts. The dispersions may be used for the preparation of ablative optical recording media.

REFERENCES:
patent: 3228881 (1966-01-01), Thomas
patent: 3281344 (1966-10-01), Thomas
patent: 3636159 (1972-01-01), Solomon
patent: 3998887 (1976-12-01), Allen

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