Preparation of articles having a contact biocidal property
US7344726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2001 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Mar 4, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N59/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a process for the preparation of an article having a contact biocidal property, there is provided a polymer solution which contains atomic/metallic silver in suspension or complexed with the polymer and/or which contains a silver compound in solution, in suspension or complexed with the polymer. This polymer solution is applied to a substrate by impregnation or surface deposition, thus coating the substrate. Alternatively, it is possible to convert the polymer solution to a fibre, film, powder or foam, effectively forming the article from the polymer solution instead of coating an existing article. In either case, any silver compound present is reduced to atomic/metallic silver, and the resultant article is dried.Chitosan is preferably used as the polymer, although poly(vinyl alcohol) and sodium alginate can also be used. The polymer may be cross-linked at a suitable point in the process to insolubilize it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.