Thermochromic microencapsulated pigments
US6494950B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2984
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a thermochromic microencapsulated pigment which comprises as four essential components (a) an electron-donating chromatic organic compound, (b) an electron-accepting compound, (c) a reaction medium determining the temperatures at which the color reactions of component (a) with component (b) take place, and (d) a color change temperature regulator, the color change temperature regulator (d) comprising one or more compounds selected from the group consisting of esters, alcohols, ketones, acid amides, hydrocarbons, and fatty acids and having a melting point Y (° C.) satisfying the relationship (X+30)° C.≦Y≦200° C., wherein X (° C.) is the melting point of component (c), and the four essential components being microencapsulated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.