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US 2003/0152632 A1Published application
Antibacterial solid surface materials containing chitosan-metal complexes
OwnerSubramaniam Sabesan, Gerry Thorn Appleton +1inventors
InventorsSubramaniam Sabesan, Gerry Thorn Appleton, Melissa C. Joerger
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Abstract
A solid surface material with an antimicrobial agent in a thermoset and/or thermoplastic resin matrix where the antimicrobial agent comprises a chitosan-metal complex.
Claims29
A solid surface material exhibiting antimicrobial effectiveness, the solid surface material comprising a matrix of a resin selected from thermoplastic resins, thermoset resins, and combinations thereof;
- and at least one antimicrobial agent dispersed in the matrix, wherein the antimicrobial agent comprises a complex selected from chitosan and a metal and chitosan and a metal compound.
A method for producing a chitosan-silver complex, the method comprising the sequential steps of:
- (a) dissolving 0.25 to 8.0% by weight chitosan in an acid solution;
- (b) adding a solution of a silver salt to the product of step (a);
- (c) adding water to the product of step (b), with stirring;
- (d) raising the pH of the product of step (c) to pH7 to 8 by adding a basic solution;
- (e) filtering the product of step (d);
- (f) washing the filtered solids obtained in step (e) with water,
- (g) washing the solids of step (f) with acetonitrile;
- (h) drying the washed solids under vacuum to obtain the chitosan-silver complex;
- and
- (i) optionally, grinding the dried product of step (h) to a fine powder.
7 more elements
Dependencies are inferred from the claim text.