Oxygen-absorbing compound encapsulated in a silica matrix and method for the production thereof
US9441157B2 · kind B2 · utility
1Cited by
14References
14Claims
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Key dates
| Filing date | Mar 18, 2011 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Nov 28, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/66
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.