Reversible thermochromic composition
US6048387A · kind A · utility
21Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1998 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Oct 2, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/3375
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A reversible thermochromic composition is provided which contains a specified diazarhodamine lactone derivative as an electron-donating color-developing organic compound, an electron-accepting compound, and a reaction medium for causing an electron exchange reaction between the components and reversibly at a specified temperature range. This reversible thermochromic composition develops clear reddish color at a colored state, and becomes colorless at a decolored state without residual color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.