Thermal print paper and process
US6613716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Mar 29, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/41
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A coating composition is applied to a print stock substrate for preparing a thermally-active layer, the coating composition comprising: a developer comprising at least one or a combination of 6′-dipentylamino-3′-methyl-2′(phenylamino)-spiro [isobenzofuran-1(3H),9′-[9H]xanthen]-3-one (CAS No. 129473-78-5) and 6′-dibutylamino-3′-methyl-2′(phenylamino)-spiro [isobenzofuran-1(3H),9′-[9H]xanthen]-3-one (CAS No. 89331-94-2); a sensitizer comprising at least one or a combination of 1,1′-sulfonylbisbenzene (CAS No. 127-63-9) and dimethylterephthalate (CAS No. 120-61-6); and a coreactant (or developer) comprising at least one or a combination of bis(4-hydroxyphenyl)-4-methylpentane (CAS No. 6807-17-6) and 4-hydroxy-4′-isopropoxydiphenylsulfone (CAS No. 95235-30-6). Preferably, the print stock substrate will be coated with clay or the like to provide a smooth coating surface for the thermally-active layer. Also preferably, the thermally-active layer will be overcoated with a protective layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.