Colloidal metals in monomers or polymers
AssigneeMinnesota Mining and Manufacturing Company
InventorsWilliam M. Lamanna, Fred B. McCormick, Robin E. Wright
Life of this patent
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Abstract
A polymeric composition of matter comprises a polymer having dispersed therein at least one of colloidal metal and metal oxide particles in the submicrometer size range, said composition being aqueous-free and free of aliphatic hydrocarbon polymers and their halogenated derivatives. Methods for preparing the dispersions of the invention are also disclosed.
Claims16
A method for preparing a colloidal elemental metal-containing composition comprising a polymer having dispersed therein submicron size colloidal elemental metal particles in an amount of 0.001 to 10 percent (wt/vol) comprising the steps of Method I, Method II, or Method III;
- Method I:
- (a) providing, by the metal atom technique, a metal colloid in a polymerizable aqueous-free liquid monomer,
- (b) effecting polymerization of said monomer, and
- (c) isolating the resultant colloidal metal-containing polymer;
- Method II:
- (a) providing a non-polymerizable, non-aqueous organic liquid, performing in either order steps (b) and (c), provided that when step (c) precedes step (b) sufficient liquid is present to provide a dispersion of metal in a liquid,
- (b) forming a colloidal metal dispersion by the metal atom technique in said liquid,
- (c) dissolving into or swelling a solid polymer in said liquid, and
- (d) isolating the resultant colloidal metal-containing polymer;
- and
- Method III:
- (a) providing a colloidal metal dispersion, by the metal atom technique, in an aqueous free liquid polymer,
- (b) effecting further polymerization of the polymer, and
- (c) isolating the resulting colloidal metal-containing polymer;
- said metal atom technique comprising forming metal vapors and contacting them with said liquid.
A method for preparing a colloidal elemental metal-containing composition comprising a polymer having dispersed therein submicrometer size colloidal elemental metal particles in an amount of 0.00 to 10 percent (wt/vol) comprising the steps:
- (a) providing a colloidal metal dispersion in a polymerizable aqueous-free liquid monomer by forming metal vapors and contacting them with said liquid monomer,
- (b) effecting polymerization of said monomer, and
- (c) isolating the resultant colloidal metal-containing polymer.
A method for preparing a colloidal elemental metal-containing composition comprising a polymer having dispersed therein submicrometer size colloidal elemental metal particles in an amount of 0.001 to 10 percent (wt/vol) comprising the steps:
- (a) providing a nonpolymerizable, non-aqueous organic liquid, performing in either order steps (b) and (c), provided that when step (c) precedes step (b) sufficient liquid is present to provide a dispersion of metal in a liquid,
- (b) forming a colloidal metal dispersion in said organic liquid by forming metal vapors and contacting them with said liquid, and
- c) dissolving into a swelling a solid polymer in said liquid, and
- (d) isolating the resultant colloidal metal-containing polymer.
A method for preparing a colloidal elemental metal-containing composition comprising a polymer having dispersed therein submicrometer size colloidal elemental metal particles in an amount of 0.00 to 10 percent (wt/vol) comprising the steps:
- (a) providing a colloidal metal dispersion in a liquid polymer by forming metal vapors and contacting them with said liquid polymer,
- (b) effecting further polymerization of said polymer, and
- (c) isolating the resulting colloidal metal-containing polymer.
A method for preparing a colloidal metal-containing polyurethane comprising the steps:
- (a) providing a colloidal metal dispersion in a polyglycol using the metal atom technique,
- (b) reacting the resulting colloidal metal-containing polyglycol with a polyisocyanate to provide a polyurethane, and
- (c) isolating the resulting metal-containing polyurethane.
A method for preparing a colloidal metal-containing composition comprising a polymer having dispersed therein submicron size colloidal metal particles in an amount of 0.001 to 10 percent (wt/vol) comprising the steps of Method I, Method II, or Method III;
- Method I:
- (a) providing, by the metal atom technique, a metal colloid in a polymerizable aqueous-free liquid monomer,
- (b) effecting polymerization of said monomer, and
- (c) isolating the resultant colloidal metal-containing polymer;
- Method II:
- (a) providing a non-polymerizable, non-aqueous organic liquid, performing in either order steps (b) and (c), provided that when step (c) precedes step (b) sufficient liquid is present to provide a dispersion of metal in a liquid,
- (b) forming a colloidal metal dispersion by the metal atom technique in said liquid,
- (c) dissolving into or swelling a solid polymer in said liquid, and
- (d) isolating the resultant colloidal metal-containing polymer;
- and
- Method III:
- (a) providing a colloidal metal dispersion, by the metal atom technique, in an aqueous free liquid polymer,
- (b) effecting further polymerization of the polymer, and
- (c) isolating the resulting colloidal metal-containing polymer;
- said metal atom technique comprising forming metal vapors and contacting them with said liquid, wherein methods I, II and 111 further comprise the step of exposing said colloidal metal dispersion to air to provide a dispersion comprising a metal oxidation product.
Dependencies are inferred from the claim text.