Antimicrobial coating for erosive environments
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08K-003/10
C08K-003/00
C08K-003/34
C08K-009/10
C08K-009/00
C09D-005/14
출원번호
UP-0006139
(2007-12-31)
등록번호
US-7598300
(2009-10-20)
발명자
/ 주소
Trogolo, Jeffrey A.
출원인 / 주소
Agion Technologies
대리인 / 주소
IP & L Solutions
인용정보
피인용 횟수 :
4인용 특허 :
12
초록▼
This invention provides for a curable antimicrobial coating system comprising a base coating composition and a top coat coating composition wherein each contains and antimicrobial agent. The base coat forms a non-hydrophilic polymer layer and the top coat preferably forms a hydrophilic polymer layer
This invention provides for a curable antimicrobial coating system comprising a base coating composition and a top coat coating composition wherein each contains and antimicrobial agent. The base coat forms a non-hydrophilic polymer layer and the top coat preferably forms a hydrophilic polymer layer or a non-hydrophilic polymer layer which does not preclude the release of the antimicrobial agent. This two-layer coating is especially designed for erosive environments and provides continual antimicrobial activity regardless of the stage of wear or erosion.
대표청구항▼
I claim: 1. A substrate which, in use, is subject to high wear or highly errosive conditions, said substrate having an antimicrobial coating which provides both immediate and long term antimicrobial bioefficacy despite the high wear or errosive conditions of use, said antimicrobial coating comprisi
I claim: 1. A substrate which, in use, is subject to high wear or highly errosive conditions, said substrate having an antimicrobial coating which provides both immediate and long term antimicrobial bioefficacy despite the high wear or errosive conditions of use, said antimicrobial coating comprising a cured base coat coating composition and a cured top coat coating composition, each coating composition derived from a curable polymer composition containing an inorganic antimicrobial agent, wherein the cured polymer of the base coat is a non-hydrophilic material and the cured polymer of the top coat is either (a) a hydrophilic material having a water absorption at equilibrium of at least 2% by weight other than a polysaccharide or hyaluronan or (b) a non-hydrophilic material that is either (i) skin forming, provided that inorganic antimicrobial agent is in particle form and the thickness of the top coat is such that an adequate number of particles of the antimicrobial agent are not skinned over so as to preclude the presence at the surface of the top coat of an antimicrobially effective amount of the antimicrobial agent, or (ii) non skin forming with respect to the antimicrobial agent; wherein said inorganic antimicrobial agent is an antimicrobial metal or metal ion containing agent; wherein said cured non-hydrophlic base coat is thicker than and has long-term durability as compared to the top coat; and wherein the substrate is selected from the group consisting of floors, conveyer belts, appliances, chemical storage tanks, animal feed tanks, cooling water systems and pipes, storage containers, bulk storage containers, silos, and storage compartments of transport vessels, rail cars and vehicles. 2. The substrate of claim 1 wherein the substrate is selected from bulk storage containers, silos, and storage compartments of transport vessels, rail cars and vehicles. 3. The substrate of claim 1 wherein the cured top coat is a hydrophilic material. 4. The substrate of claim 3 wherein the cured hydrophilic material is selected from the group consisting of poly(alkylene ether) esters, polyacrylates, polymethacrylates, polyurethanes, polyamides, polyacrylamides, polymethacrylamides, polyvinylpyrrolidinones, polyureas, polyvinylacetates, polyvinylalcohols, copolymers of the foregoing, copolymers having a substantial presence of hydrophilic monomers used in the foregoing and blends of any two or more of the foregoing. 5. The substrate of claim 3 wherein the cured hydrophilic material is selected from the group consisting of polyhydroxyethyl methacrylate, polyacrylamide, polyurethanes, N-vinyl-2-pyrrolidinone, polylactic acid, polyamides, and blends thereof. 6. The substrate of claim 3 wherein the cured hydrophilic top coat is a polymer with water absorption at equilibrium of at least about 5% by weight. 7. The substrate of claim 3 wherein the cured hydrophilic top coat is a polymer with water absorption at equilibrium of at least about 20% by weight. 8. The substrate of claim 1 wherein the cured top coat is non-skin forming, non-hydrophilic material. 9. The substrate of claim 1 wherein the cured top coat is a skin forming non-hydrophilic material provided that the inorganic antimicrobial agent is in particle form and at least about 40% of the antimicrobial particles have a diameter that is equal to or greater than the thickness of the top coat. 10. The substrate of claim 1 wherein the cured top coat is a skin forming non-hydrophilic material provided that average diameter of the antimicrobial agent particles is about the same as or greater than the thickness of the top coat. 11. The substrate of claim 1 wherein the cured polymer of the base coat is a cured thermoset polymer and wherein antimicrobial agent entombed within the base coat is ineffective in providing antimicrobial bioefficacy at the coating surface. 12. The substrate of claim 11 wherein the thermoset polymer is chosen from the group consisting of phenolic resins, urea resins, epoxy resins, polyesters, epoxy polyesters, acrylics, and polyurethanes. 13. The substrate of claim 12 wherein the thermoset polymer is an epoxy resin. 14. The substrate of claim 1 wherein the inorganic antimicrobial agent comprises a metal or metal ion selected from silver, copper, zinc, tin, gold, mercury, lead, iron, cobalt, nickel, manganese, arsenic, antimony, bismuth, barium, cadmium, chromium and thallium ions and combinations thereof. 15. The substrate of claim 14 wherein the metal or metal ion is silver, zinc, copper or a combination of any two or all three of the foregoing. 16. The substrate of claim 14 wherein each of the antimicrobial agents is independently selected from the group consisting of metal salts, antimicrobial metal or metal ion containing water soluble glasses, antimicrobial metal ion-exchange type antimicrobial agents and combinations thereof. 17. The substrate of claim 16 wherein the antimicrobial agent is an ion-exchange type antimicrobial agent comprising a ceramic carrier and ion-exchanged antimicrobial metal ions. 18. The substrate of claim 17 wherein the ceramic carrier is selected from the group consisting of zeolites, hydroxyapatites, and zirconium phosphates. 19. The substrate of claim 16 wherein both of the antimicrobial agents are ion-exchange type antimicrobial agents. 20. The substrate of claim 16 wherein at least one of the antimicrobial agents is encapsulated in a hydrophilic polymer. 21. The substrate of claim 20 wherein the antimicrobial agent in the base coat is an encapsulated ion-exchange type antimicrobial agent comprising a ceramic carrier having ion-exchanged antimicrobial metal ions. 22. The substrate of claim 20 wherein each particle of the encapsulated antimicrobial agent includes a plurality of particles of the antimicrobial agent. 23. The treated substrate of claim 1 wherein the substrate is a floor in a food preparation and processing facility or in a pharmaceutical or biotechnology related manufacturing, testing or processing facility.
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Agrawal, Anoop; Krasnow, Nicholas R.; Cronin, John P.; Adams, Lori L.; Akarsu, Murat; Reeser, Ryan J.; Lopez-Tonazzi, Juan Carlos; Uhlmann, Donald R., Antimicrobial compositions for use in products for petroleum extraction, personal care, wound care and other applications.
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