Process for manufacture of nanometric, monodisperse, stable metallic silver and a product obtained therefrom
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United States of America Patent
Stats
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Jun 21, 2016
Grant Date -
Jun 10, 2010
app pub date -
Apr 3, 2007
filing date -
Dec 20, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to a procedure for preparation by wet reduction method of nanometric particles of metallic silver, with diameter in the range of 1 to 100 nm and an average diameter of 20 to 40 nm, with monodispersion characteristics, stability greater than 12 months and in a wide range of concentrations. The process comprises 4 steps: a) preparation of the reducing agent solution, taken from the group of tannins and preferably being tannic acid; b) preparation of a solution of a soluble silver salt; c) reaction and, d) solid-liquid separation; the particle size is determined by the nature of the reducing agent and by the pH control of the currents. The final step is designed for separating and concentrating the material after which the user can prepare the product for integration thereof in the desired medium. The particles obtained are redispersable in different media, such as water, alkydalic and phenolic resins, nitrocellulose, polyurethane, vinylics, acrylics, alcohols and in a wide variety of organic and polymeric materials such as high and low density polyethylene, Nylon, ABS and/or mixtures thereof.
First Claim
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International Classification(s)
- 2007 Application Filing Year
- C22B Class
- 169 Applications Filed
- 94 Patents Issued To-Date
- 55.63 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C22B Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 21, 2027 |
