PREPARATION OF COLLOIDAL DISPERSIONS OF NICKEL, PALLDAIUM AND PLATINUM OF THE POLYMER-CATALYZED DECOMPOSITION OF CARBONYL COMPOUNDS THEREOF

摘要

ABSTRACT OF THE DISCLOSUREThere is disclosed a method for the preparation of a homogeneous,physically stable dispersion of colloidal metal particles of a transition metalselected from the group consisting of nickel, palladium and platinum having asize in the range of from about 10 Angstrom units to about 200 Angstrom units.The method comprises preparing a solution of a functional polymer in an inertsolvent, and incrementally adding thereto a transition metal precursor, at atemperature at which the transition metal precursor will become bound to thepolymer and thermally decompose to produce elemental transition metalparticles, the process being carried out in an inert atmosphere. Suchof supported colloidal transition metal catalysts. The dispersions may also beused for the preparation of ablative optical recording media.