US 12,459,857 B2
Antimicrobial coating
Rory Back, Liverpool (GB); Simon Paul Oliver, Chester (GB); Luz Romero, Liverpool (GB); Simon Jeffreys, Liverpool (GB); and Andrew Oliver Smith, St. Helens (GB)
Assigned to Pilkington Technology Management Limited, Oban (GB)
Appl. No. 17/437,487
Filed by PILKINGTON TECHNOLOGY MANAGEMENT LIMITED, Argyll Scotland (GB)
PCT Filed Mar. 16, 2020, PCT No. PCT/GB2020/050672
§ 371(c)(1), (2) Date Sep. 9, 2021,
PCT Pub. No. WO2020/183204, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 1903507 (GB), filed on Mar. 14, 2019.
Prior Publication US 2022/0144694 A1, May 12, 2022
Int. Cl. B05D 7/00 (2006.01); C03C 17/00 (2006.01)
CPC C03C 17/007 (2013.01) [C03C 2204/02 (2013.01); C03C 2217/445 (2013.01); C03C 2217/478 (2013.01); C03C 2217/479 (2013.01); C03C 2217/70 (2013.01); C03C 2218/112 (2013.01); C03C 2218/118 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A process for producing an antimicrobial coating on a glass substrate, the process comprising the steps of:
i) providing a glass substrate having a first surface and a second surface;
ii) providing a silicon containing solution and a particle containing solution which comprises particles;
iii) mixing together the silicon containing solution and the particle containing solution to form a silica coating composition;
iv) contacting at least said first surface of the substrate with the silica coating composition to deposit a layer of the silica coating composition on the glass substrate; and
v) curing the silica coating composition deposited on the glass substrate to form a silica matrix coating layer, wherein the particles are deposited on and/or within the silica matrix coating layer in an amount of from 0.1 to 20% by weight, resulting in an antimicrobial coated glass substrate;
wherein the silica coating composition further comprises at least 1.0% by weight aluminium relative to the amount of silica in the silica matrix coating layer;
wherein the particle containing solution comprises metal particles and/or metal agglomerates, and the metal particles and/or metal agglomerates comprise copper; and
wherein the antimicrobial coated glass substrate provides at least a 2 log reduction against gram positive and/or gram negative bacteria within 2 hours at 37° C.