Nanosilver as a biocide in building materials
View Patent ↗Nanosilver for use as a biocide in coated fibrous substrate facers and other construction and/or building substrates, for protection against bacteria (particularly cyanobacteria), fungi, molds, algae and other bio-organisms known to deface and/or adversely affect such building materials. Facers referred to are commonly used in the construction industry as exposed surfaces for insulation and sheathing boards.
1. A building material product comprising a substrate and a biocidal coating containing approximately 0.0001% to approximately 0.01% by dry weight of nano-sized silver, wherein the substrate comprises a facer or roofing membrane, wherein the coating is aqueous based and wherein the coating also contains a filler.
2. The building material product of claim 1 , wherein the coating is a latex.
3. The building material product of claim 2 , wherein the latex is an acrylic latex.
4. The building material product of claim 1 , wherein the coating is foamed.
5. The building product of claim 1 , wherein the coating contains some or all of the following: surfactant(s), UV stabilizer(s), thermal stabilizer(s), pigment(s), other co-biocides, fibrous reinforcements, strength additives, compatibilizers, and/or fire retardants.
6. The building material product of claim 1 , wherein the coating is applied to only one side of the substrate.
7. The building material product of claim 1 , wherein the coating is applied to both sides of the substrate.
8. The building material product of claim 1 , wherein the coating saturates the substrate.
9. The building material product of claim 1 , wherein the substrate is a non-woven substrate.
10. The building material product of claim 1 , wherein the substrate is selected from the group consisting of fiberglass, cellulose, synthetic fiber, polyester, roof insulation, sheathing, single-ply roofing membrane, asphalt-containing roof membrane, gypsum board, siding and roof underlayment or housewrap.
11. The building material product of claim 1 , wherein the substrate contains a polymeric film, either by itself or adhered to a co-substrate.
12. The building material product of claim 1 , wherein the nano-sized silver is effective in killing and/or preventing the growth of mold, fungus, algae or bacteria on the facer.
13. The building material product of claim 1 , wherein the facer or roofing membrane includes an insulation product.
14. A facer or roofing membrane comprising a substrate coated with a biocidal coating, wherein the coating is aqueous based, and wherein the coating contains: (a) nano-sized silver in an amount of approximately 0.0001% to approximately 0.01% of the coating by dry weight; and (b) a filler.
15. The facer or roofing membrane of claim 14 , wherein the coating is latex.
16. The facer or roofing membrane of claim 15 , wherein the latex is an acrylic latex.
17. The facer or roofing membrane of claim 14 , wherein the coating is foamed.
18. The facer or roofing membrane of claim 14 , wherein the coating contains some or all of the following: surfactant(s), UV stabilizer(s), thermal stabilizer(s), pigment(s), other co-biocides, fibrous reinforcements, strength additives, compatibilizers, and/or fire retardants.
19. The facer or roofing membrane of claim 14 , wherein the coating is applied to only one side of the substrate.
20. The facer or roofing membrane of claim 14 , wherein the coating is applied to both sides of the substrate.
21. The facer or roofing membrane of claim 14 , wherein the coating saturates the substrate.
22. The facer or roofing membrane of claim 14 , wherein the substrate is a non-woven substrate.
23. The facer or roofing membrane of claim 14 , wherein the substrate is selected from the group consisting of fiberglass, cellulose, synthetic fiber, polyester, roof insulation, sheathing, single-ply roofing membrane, asphalt-containing roof membrane, gypsum board, siding and roof underlayment or housewrap.
24. The facer or roofing membrane of claim 14 , wherein the substrate contains a polymeric film, either by itself or adhered to a co-substrate.
25. The facer or roofing membrane of claim 14 , wherein the nano-sized silver is effective in killing and/or preventing the growth of mold, fungus, algae or bacteria on the facer.
26. The facer or roofing membrane of claim 14 , wherein the facer is attached to an insulation material.
27. The facer or roofing membrane of claim 14 , wherein the facer is attached to one or both sides of a gypsum board.
28. A building material product comprising:
a substrate chosen from a facer or roofing membrane, and
an aqueous based biocidal coating containing: (a) a filler; and (b) approximately 0.0001% to approximately 0.01% by dry weight of one or more nano-sized metals, metal oxides or metal ions selected from the group consisting of silver, zinc, copper, nickel, lead and iron.
29. The building material product of claim 1 , wherein the substrate comprises a single ply roofing membrane.
30. The building material product of claim 29 , wherein the single ply roofing membrane is chosen from a polyvinyl chloride (PVC) membrane, a thermoplastic olefin (TPO) membrane, an ethylene propylene diene monomer (EPDM) membrane or a neoprene rubber membrane.
31. The building material product of claim 1 , comprising a biocidal coating containing approximately 0.0001% to approximately 0.002% by dry weight of nano-sized silver.
32. The building material product of claim 31 , comprising a biocidal coating containing approximately 0.0001% to approximately 0.0004% by dry weight of nano-sized silver.