Antimicrobial glass and glass-like products and method of preparing same
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United States of America Patent
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Jul 26, 2005
Grant Date -
Aug 26, 2004
app pub date -
Feb 20, 2003
filing date -
Feb 20, 2003
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Abstract
A glass or glass-like substrate having a contact-killing, non-leaching antimicrobial effective amount of metal ions contained in at least one surface region thereof, and having a color of b*≦+6 on the CIE international color scale is disclosed. The antimicrobial substrate is prepared by providing a metal ion precursor comprising at least one source of antimicrobial effective metal ions dissolved or otherwise dispersed in a carrier material; depositing the precursor onto at least one surface of the substrate; drying the substrate at a temperature of from about 20° C. to about 105° C. by removing volatiles from the metal ion precursor; and heating the resulting substrate at a temperature of about 600-650° C. for 2-5 min. to exchange or otherwise implant antimicrobial metal ions from the precursor and into the glass or glass-like substrate.
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