Chromogenic materials, methods of making chromogenic materials, and methods of use
US12258470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2019 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Jul 27, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present disclosure provides for porous polymer materials that include an ordered array of voids separated by a polymer framework. The porous polymer material can have a recovery state where the voids are in an uncollapsed state and iridescent color, and a deformed state having voids in a collapsed state that is non-iridescent or substantially transparent. The materials can have regions of both states simultaneously. Also described are methods for fabricating a polymer material as above, as well as chromogenic sensors including the polymer material. The sensors can have hidden anti-counterfeiting patterns, hydrophobic/oleophobic properties, and chromogenic transformation can be triggered by various stimuli such as solid target compounds, light energy, and more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.