Temperature controlled variable reflectivity coatings
US8541094B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2011 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Mar 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2984
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Coatings configured to change between a relatively higher reflectivity state and a relatively lower reflectivity state depending at least partially upon temperature are generally disclosed. Some example coatings may include a selectively reflective layer including a plurality of microcapsules, which may include an ionic liquid and/or a surfactant within a shell. The microcapsules may have a relatively higher reflectively when at temperatures above a cloud transition temperature and/or a relatively lower reflectivity when at temperatures below the cloud transition temperature. When at temperatures above the cloud transition temperature, the selectively reflective layer may reflect a first fraction of the incident light. When at temperatures below the cloud transition temperature, the selectively reflective layer may reflect a second fraction of the incident light. The first fraction of the incident light may be greater than the second fraction of the incident light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.