Universidad De Los Andes

Jorge Alberto Medina Perilla

Angela Maria Garcia Mora

Jacques Verdu

Bruno Fayolle

Andrea Marcela Arias Herrera

Jairo Arturo Escobar Gutierrez

Ronald Vicente Joven Pineda

The production of an oxygen-absorbent composition is provided, having: (a) a porous silica encapsulation matrix; and (b) a composition containing an oxygen-absorbent compound selected from fatty acids, unsaturated esters or compounds containing same, and, optionally, a catalyst based on an inorganic salt of a transition metal, wherein the composition (b) is encapsulated in the porous silica matrix (a). The composition can form part of the structure of the packaging for oxidation sensitive products or be placed in the surrounding atmosphere to reduce the concentration of oxygen. A method for encapsulating the active compound or the active compound together with a catalyst, and subsequently incorporating same into polymer matrices is also provided.

Oxygen-absorbent composition comprising a silica matrix that encapsulates fatty acids, unsaturated esters or compounds containing same, and method for producing said composition

This disclosure refers to the fabrication of an active oxygen-absorbing compound composed of a sodium erythorbate and a non-organic salt of a transition metal encapsulated through the sol-gel method in a silica matrix. This compound can be part of the package's structure for oxidation-sensitive products or contained in the surrounding atmosphere to decrease the oxygen concentration. This application describes the method for the fabrication of the oxygen-absorber, as well as its encapsulation and incorporation in polymeric matrixes.

Oxygen-absorbing compound encapsulated in a silica matrix and method for the production thereof

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Bogota, Colombia

Jorge Alberto Medina Perilla