Antibacterial material and antibacterial film and antibacterial member using the same
US11896966B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 12, 2020 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Dec 12, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In one embodiment, an antibacterial material includes at least one microparticles selected from tungsten oxide microparticles and tungsten oxide complex microparticles. The microparticles, which have undergone a test to evaluate viable cell count by inoculating in a test piece, to which the microparticles are adhered in a range of 0.02 mg/cm2 or more and 40 mg/cm2 or less, at least one bacterium selected from among Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus, and enterohemorrhagic Escherichia coli, and storing for 24 hours, have an antibacterial activity value R of 0.1 or more expressed by the following: R=log(B1/C1) where, B1 denotes an average value (number) of viable cell count after storing an untreated test piece for 24 hours, and C1 denotes an average value (number) of viable cell count after storing the test piece on which the microparticles are coated for 24 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.