Biocidal colloidal dispersions of silica particles with silver ions adsorbed thereon
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United States of America Patent
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Aug 18, 2015
Grant Date -
Nov 29, 2012
app pub date -
Sep 20, 2010
filing date -
Sep 22, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A colloidal dispersion having carrier particles of silica having a particle size from 3 nm to 100 nm to which silver ions have been adsorbed, preferably in an amount of 0.0005-5 silver ions per nm2 of silica particle surface. The surface of the carrier particles of silica suitably contains aluminumsilicate sites. It also relates to a process for making a colloidal dispersion comprising providing a silica sol, adding a solution of silver nitrate to the silica sol under agitation yielding a colloidal dispersion with silver ions adsorbed on the surface of the silica particles. The dispersion is usable as a biocide in e.g. coatings, adhesives and sealants, in surface treatment and impregnation of organic materials, in surface treatment and impregnation of inorganic materials, in textiles, garments and shoes, in medical disposables, in plastics and rubbers, in water and air purification, and in crop protection.
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International Classification(s)
- A01P:BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT....
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- A01N:PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLA....
- B82Y:SPECIFIC USES OR APPLICATIONS OF NANO-STRUCTURES; ....
- C09D:COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQ....
- C09C:TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBRO....
- C01G:COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLAS....
- C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....
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