Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-12-04
1981-02-24
Niebling, John F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
260 4222, 430286, 430945, 568451, 568454, 568455, B01J 3102, C08K 308
Patent
active
042526728
ABSTRACT:
There is disclosed a method for the preparation of a homogeneous, physically stable colloidal elemental iron dispersion of colloidal iron 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 a passive polymer in an inert solvent, and incrementally adding thereto an iron precursor, at a temperature at which the iron precursor will lose at least one ligand and become bound to the passive polymer and thermally decompose to produce elemental iron 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 iron catalysts. The dispersions may also be used for the preparation of ablative optical recording media, and for the preparation of magnetic xerographic developer materials.
REFERENCES:
patent: 3228881 (1966-01-01), Thomas
patent: 3281344 (1966-10-01), Thomas
patent: 3824221 (1974-07-01), Ragg
patent: 3998864 (1976-12-01), Trevillyan
patent: 3998887 (1976-12-01), Allen
Brownrout H. M.
Eichler P. P.
Niebling John F.
Palazzo E. O.
Xerox Corporation
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