Dialkoxycarbonylmethyleneurethane diynes
US4452995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Apr 2, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Polydiacetylene gel compositions, comprised of a polydiacetylene and a gel-forming liquid therefor, are described which undergo a change in color and in physical state to a solution when heated to a predetermined temperature. The gel compositions exhibit hysteresis temperature characteristics which allow the original color change to be maintained and recorded until the solution is cooled below the predetermined temperature. Thus, the gel compositions are useful in temperature-indicating devices for reversibly monitoring a wide range of temperatures. A novel class of polydiacetylene compounds is also described, useful in forming the gel compositions, formed from monomeric diacetylenediol bis(alkoxycarbonylmethylurethanes).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.