US 12,280,423 B2
Biocidal compositions of copper and silver and process for adhering to product substrates
Orville Bailey, East Hartford, CT (US)
Assigned to COVALENT COATING TECHNOLOGY, INC., East Hartford, CT (US)
Appl. No. 17/997,863
Filed by COVALENT COATING TECHNOLOGY, INC., East Hartford, CT (US)
PCT Filed May 6, 2021, PCT No. PCT/US2021/031133
§ 371(c)(1), (2) Date Nov. 3, 2022,
PCT Pub. No. WO2021/226362, PCT Pub. Date Nov. 11, 2021.
Claims priority of provisional application 63/022,099, filed on May 8, 2020.
Prior Publication US 2023/0174794 A1, Jun. 8, 2023
Int. Cl. A01P 1/00 (2006.01); A01N 25/10 (2006.01); A01N 59/02 (2006.01); A01N 59/20 (2006.01); B22F 1/00 (2022.01); B22F 1/05 (2022.01); B22F 1/10 (2022.01); B22F 1/105 (2022.01); B22F 1/12 (2022.01); B22F 7/04 (2006.01); C09D 5/14 (2006.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01)
CPC B22F 1/09 (2022.01) [A01N 25/10 (2013.01); A01N 59/02 (2013.01); A01N 59/20 (2013.01); A01P 1/00 (2021.08); B22F 1/05 (2022.01); B22F 1/10 (2022.01); B22F 1/105 (2022.01); B22F 1/12 (2022.01); B22F 7/04 (2013.01); C09D 5/14 (2013.01); C09D 7/61 (2018.01); C09D 7/69 (2018.01); B22F 2301/10 (2013.01); B22F 2302/45 (2013.01); B22F 2303/40 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A surface coating for a product substrate comprising:
a biocidal composition comprising:
a powder of core metal or compounds thereof comprising one or more of the following:
copper, silver and gold; wherein the powder has a particle size of 5 to 100 micrometers, and a weight percentage of the core metal is in a range from 10% by weight to 95% by weight of the composition;
a photoconductive additive comprising one or more of the following:
selenium and selenium powders; compounds of selenium and powders of compounds of selenium; and salts of selenium and powders of the salts of selenium; and
optionally, a photoconductive additive comprising one or more of the following:
thallous oxide;
carbazole-containing polymers; and
triarylamine-containing polymers;
wherein the core metal compounds thereof are oxides of the core metal or halides of the core metal; and
wherein the surface coating forms a biocidal film on the surface of the product substrate where the core metal or compounds thereof in combination with selenium, selenium compounds or selenium salts provide a synergistic effect to the biocidal film.