Abstract: An antimicrobial composition comprising about 99.95 wt % to about 50 wt % of a particulate oxide composition with precious metals dispersed on the surface of the particulate oxide composition. In this antimicrobial composition, the precious metals are selected from the group consisting of copper (Cu), nickel (Ni), silver (Ag), palladium (Pd), platinum (Pt), ruthenium (Ru), gold (Au), osmium (Os), rhodium (Rh), and mixtures thereof, and the particulate oxide composition comprises cerium oxide, trivalent dopant selected from the group consisting of yttrium (Y), lanthanum (La), neodymium (Nd), praseodymium (Pr), and mixtures thereof, and optionally an additional oxide selected from the group consisting of aluminum (Al), titanium (Ti), zirconium (Zr), hafnium (Hf), silicon (Si) and mixtures thereof, with the cerium oxide being present in an amount greater than the trivalent dopant. Also described are methods of using these compositions to remove biological contaminants.

Abstract: This disclosure relates to novel blended compositions for biological contaminant removal containing a particulate oxide composition and silver zinc zeolite. The particulate oxide composition is a mixed oxide of at least cerium and trivalent dopant. These blended compositions can be used as antimicrobial/antibacterial/antiviral agents. As such, this disclosure also relates to the use of these blended compositions for biological contaminant removal. The blended compositions have uses for removing bacteria, viruses, protozoa (e.g., amoebae), fungi (e.g., mold), algae, yeast, and the like. In particular, these blended compositions can be used in methods for treating fluids, including liquids or air, and solid surfaces through contact.

Abstract: PVC compositions disclosed herein comprise PVC resin, a co-precipitated rare earth additive, and an inorganic flame retardant. These PVC compositions demonstrate an improved flame retardance and have UL94 classification with a sample thickness of about 0.8 mm of V-2 or higher. The co-precipitated rare earth additive contains a rare earth and one or more of zinc, aluminum, and magnesium, wherein the co-precipitated rare earth additive contains about 5 to about 95% by weight rare earth measured on an oxide basis. The inorganic flame retardant can be ATO, MDH, ATH, or mixtures thereof. The co-precipitated rare earth additive provides improved properties in comparison to an identical PVC composition containing the components of the co-precipitated additive but added to the PVC composition as a blend of these components rather than a co-precipitant.