Thermosensitive recording medium
US8492308B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Nov 25, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M2205/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a thermosensitive recording medium with excellent color developing sensitivity, moist heat resistance and plasticizer resistance, as well as excellent heat resistance, background coloring, light resistance and the like in the printed image.A diphenyl sulfone derivative containing a hydroxyl group on one end and an alkoxy group on the other end has a higher melting point than the one containing hydroxyl groups on both ends. As a result, the thermosensitive recording medium obtained using the diphenyl sulfone derivative as the color developing agent in the thermosensitive color developing layer has excellent heat resistance. However the color developing sensitivity of the thermosensitive recording medium generally declines simultaneously, when a color developing agent with a high melting point is ordinarily used. The thermosensitive recording medium of the present invention that uses a combination of the diphenyl sulfone derivative and a specific phenol derivative in the thermosensitive color developing layer has a good color developing sensitivity and an improved balance among the properties such as moist heat resistance, plasticizer resistance and the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.