Antimicrobial compositions, process for preparing the same and use
AssigneeE. I. Du Pont de Nemours and Company
InventorsHoward W. Jacobson, Michael H. Scholla, Annie W. Wigfall
Life of this patent
Estimating the term…
Abstract
An antimicrobial composition of titanium dioxide, barium sulfate, zinc oxide particles, and mixtures thereof having successive coatings of silver, in some cases a coating of zinc and/or copper compounds such as zinc oxide, copper (II) oxide and zinc silicate; silicon dioxide; alumina; and a dispersion aid such as dioctyl azelate.
Claims13
An antimicrobial composition consisting essentially of coated core particles wherein the core particles consist essentially of a mixture of at least two members selected from the group consisting of titania, barium sulfate and zinc oxide that have an average diameter between about 0.005 to about 3.0 microns, wherein said core particles are coated successively based upon said particles, with (a) about 0.2 to at least about 1 weight % silver, (b) about 0.2 to at least about 0.8 weight % of at least one member from the group of zinc, zinc oxide, zinc silicate, copper, and copper (II) oxide, (c) about 0.2 to 5 weight % of a protective coating;
- (d) about 1 to at least about 3 weight % of a dispersion coating;
- and Led about 0.2 to 3 weight % of a dispersion aid.
An antimicrobial composition consisting essentially of about 40 to 60% titania particles and about 40 to 60% barium sulphate particles wherein both of said particles are successively coated based upon said particles, with about 0.2 to 1% wt. Ag, about 0.2 to about 0.8% CuO, about 0.2 to about 5% SiO.sub.2, about 1 to about 3% Al.sub.2 O.sub.3 ;
- and about 0.2 to 3% dioctyl azelate.
Dependencies are inferred from the claim text.