Thermal transfer printing
US5328886A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1992 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Dec 4, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/914
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal transfer printing sheet comprising a substrate having a coating of a disazo of Formula (1): ##STR1## wherein: each R independently is selected from --H; --CH.sub.3 ; --CN; --NO.sub.2 ; m--COT.sup.1 ; --SO.sub.2 T.sup.1 ; m--COOT.sup.2 ; --COOPh; --SO.sub.2 F; --SO.sub.2 Cl; and --COOT.sup.2 OT.sup.3; PA1 n is 1 or 2; PA1 R.sup.2 is --H or C.sub.1-4 -alkyl; PA1 R.sup.3 is --CN; PA1 R.sup.4 is --H, C.sub.1-6 -alkylCO.OC.sub.1-6 -alkyl-, C.sub.1-6 -alkylOCOC.sub.1-6 -alkyl- or C.sub.1-6 -alkyl; PA1 R.sup.5 is C.sub.1-6 -alkylCO.OC.sub.3-6 -alkyl- or C.sub.1-6 -alkylOCOC.sub.3-6 -alkyl-; and PA1 R.sup.6 is selected from --H; C.sub.1-4 -alkyl; and --NHCOT.sup.1 ; wherein PA2 T.sup.1 is C.sub.1-6 -alkyl or phenyl, T.sup.2 is C.sub.1-6 -alkyl, and T.sup.3 is C.sub.1-6 -alkyl. The above transfer printing sheets are used to produce printed receiver sheets in a dye diffusion thermal transfer printing process. The derived printed receiver sheets have good optical densities, are fast to light and heat and are particularly resistant to finger grease.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.