Developers for thermal recording materials and thermal recording materials
US7141359B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Aug 29, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C39/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The object of the present invention is to provide a novel developer capable or realizing a thermal recording material superior in preservation stability (i.e., heat resistance, moisture resistance) of color images and non-image areas, while satisfying the recent request for high sensitivity, and a thermal recording material using the developer.The developer for a thermal recording material of the present invention is characterized in that it consists of a composition containing, of condensates represented by the formula (I):wherein R is a halogen atom, a hydroxyl group, an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, a cyano group, a nitro group, an aryl group or an aralkyl group, R in the number of m may be the same or different and m is an integer of 0–3, and n is an integer of 0–3, a condensate having two cores wherein n=0 as a main component, and at least one kind of condensate of the formula wherein n=1–3, and that a thermal recording material obtained using this developer shows high sensitivity, high dynamic color density, and superior preservation stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.