Colloidal size hydrophobic polymer particulate having discrete particles of a metal dispersed therein
AssigneeThe Dow Chemical Company
InventorJitka Solc
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Abstract
Colloidal size particles of a non-oxidized metal (e.g., iron or silver) are encapsulated in a hydrophobic polymer (e.g., a copolymer of styrene and butylacrylate) by a polymerization process wherein a water-immiscible monomer is dispersed in an aqueous colloidal dispersion of preformed metal particles and subjected to conditions of emulsion polymerization. The resulting encapsulated non-oxidized metal particles are usefully employed as electrically resistive barriers, toners, electroconductive additives and as pressure sensors.
Claims13
An aqueous colloidal dispersion comprising a continuous aqueous phase and a polymer/inorganic solid disperse phase wherein a substantial portion of the particles of the disperse phase comprise a hydrophobic polymer matrix having dispersed therein essentially non-oxidized colloidal metal particles such that substantially all of the inorganic particles are maintained in a discrete spaced apart relationship to one another by the hydrophobic polymer.
A particulate having colloidal size particles wherein substantially all of said particles comprise a hydrophobic polymer matrix and at least one discrete colloidal particle of an inorganic solid dispersed in said matrix, wherein said inorganic solid is in the form of essentially non-oxidized colloidal metal particles.
Dependencies are inferred from the claim text.