Patent ID: 9371586
Filing Date: 2016-06-21
CPC Classification: A01N,B82Y,C01P,C09C,C23C

Claim Text:
1. A method of manufacturing silica nanopowders with biocidal properties, by sol-gel method, consisting in that a silica sol is obtained from an aqueous mixture containing tetraalkoxysilane, in which alkoxy group contains from C 1 to C 4 carbon atoms, an alcohol or a mixture of aliphatic alcohols from C 1 to C 4 in the presence of an ammonium compound characterized in that after thorough mixing of components, in situ a silver salt in the form of an aqueous solution is introduced in an amount from 0.02 to 1 mol per 1 mol of tetraalkoxysilane, and subsequently an aqueous solution of alkali metal hydroxide in an amount from 0.02 to 1 mol of hydroxide per 1 mol of tetraalkoxysilane.