Thermochromic polyurethane foam
US4666949A · kind A · utility
9Cited by
12References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 31, 1986 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Jan 31, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermochromatic polyurethane foam comprising a polyol and a polyisocyanate as main components, and a thermochromic composition serving as a coloring agent and added to the main components singly or conjointly with a usual dye or pigment. The thermochromic composition comprises an electron-donating chromogenic material, an acidic substance and a solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.