Pressure sensitive adhesive containing a nucleating agent for use in a disposable thermometer
US4397570A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1981 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Jun 2, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A new and useful composition of matter, solid at room temperature, is disclosed, comprising: (1) an effective amount of a suitable nucleating agent substantially uniformly dispersed in (2) a suitable pressure-sensitive adhesive for encapsulating a temperature-sensitive solid mixture having a given nucleation efficiency and which melts at a predetermined temperature, whereby the suitable nucleating agent is (a) inert to both the pressure-sensitive adhesive and the temperature-sensitive solid mixture, and (b) capable of raising the nucleation efficiency of said solid mixture. The novel composition of matter overcomes the extreme super-cooling achieved by temperature-indicating compositions of matter in U.S. Pat. No. 4,232,552 (which change color with a change in phase) without the use of classical nucleating agents being employed in such temperature-indicating compositions of matter. The novel adhesive composition of matter has been found to be especially suitable in conjunction with a preferred '552 temperature-indicating composition of matter comprising pinacyanol iodide dissolved in a solvent comprising ortho-chloronitrobenzene and ortho-bromonitrobenzene. An especially suitable n…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.