Deposition of silver layer on nonconducting substrate
First Claim
1. An article that resists microbial growth prepared by a method which consists essentially of(a) activating at least a portion of the surface area of an article which article is constructed of a nonconducting material selected from the group consisting of latex, polystyrene, polyester, polyvinylchloride, polyurethane, ABS polymers, polycarbonate, polyamide, polytetrafluoroethylene, polyimide and synthetic rubber;
- followed by(b) chemically depositing a silver layer of 2-2000 Å
by treating said activated surface with an aqueous solution of at least one salt of silver in the presence of a deposition control agent, said depositing being conducted for only sufficient time to result in said 2-2000 Å
silver layer;
followed by(c) rinsing in demineralized water and drying.
2 Assignments
0 Petitions
Accused Products
Abstract
A thin silver layer is deposited on the surface of a nonconducting substrate using an electroless process. The surface is cleaned and activated in aqueous solution containing stannous tin. The silver is deposited as a colloidal material from an aqueous solution of a silver-containing salt in the absence of an electric current, but in the presence of a deposition control agent. Optionally, the silver layer is stabilized with an aqueous solution of a platinum-group metal and/or gold. The resulting silver layer is uniform and of 2-2000 Å thickness; it strongly adheres to the substrate.
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Citations
35 Claims
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1. An article that resists microbial growth prepared by a method which consists essentially of
(a) activating at least a portion of the surface area of an article which article is constructed of a nonconducting material selected from the group consisting of latex, polystyrene, polyester, polyvinylchloride, polyurethane, ABS polymers, polycarbonate, polyamide, polytetrafluoroethylene, polyimide and synthetic rubber; - followed by
(b) chemically depositing a silver layer of 2-2000 Å
by treating said activated surface with an aqueous solution of at least one salt of silver in the presence of a deposition control agent, said depositing being conducted for only sufficient time to result in said 2-2000 Å
silver layer;
followed by(c) rinsing in demineralized water and drying. - View Dependent Claims (2, 3, 4, 5)
- followed by
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6. An article that resists microbial growth which is constructed of a nonconducting substrate selected from the group consisting of latex, polystyrene, polyester, polyvinylchloride, polyurethane, ABS polymers, polycarbonate, polyamide, polytetrafluoroethylene, polyimide and synthetic rubber, wherein said nonconducting substrate is activated over at least a portion of its surface and said activated portion is coated with a coating consisting essentially of an adhesive layer of silver, wherein said silver layer is 2-2000 Å
- in thickness, and
wherein said silver layer is in colloidal form. - View Dependent Claims (7, 8, 9, 10)
- in thickness, and
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11. An article that resists microbial growth which is constructed of a nonconducting substrate selected from the group consisting of latex, polystyrene, polyester, polyvinylchloride, polyurethane, ABS polymers, polycarbonate, polyamide, polytetrafluoroethylene, polyimide and synthetic rubber, wherein said nonconducting substrate is activated over at least a portion of its surface and said activated portion is coated with a coating consisting essentially of an adhesive layer of silver
wherein said silver layer is 2-2000Å - in thickness.
- View Dependent Claims (12, 13, 14, 15)
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16. An article that resists microbial growth which is constructed of a nonconducting substrate, wherein said nonconducting substrate is coated over at least a portion of its surface area with an adhesive, antimicrobial, biocompatible coating consisting essentially of a layer of silver that has been stabilized by exposure to a solution containing the salt of one or more platinum group metals or gold or a combination thereof, wherein said coating is 2-2000 Å
- in thickness, and
wherein said silver layer is in colloidal form. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
- in thickness, and
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26. An article that resists microbial growth which is constructed of a nonconducting substrate, wherein said nonconducting substrate is coated over at least a portion of its surface area with an adhesive, antimicrobial, biocompatible coating consisting essentially of a layer of silver that has been stabilized by exposure to a solution containing the salt of one or more platinum group metals or gold or combination thereof,
wherein said coating is 2-2000 Å
Specification