Thermal transfer printing
AssigneeImperial Chemical Industries PLC
InventorsRoy Bradbury, Alan Butters
Life of this patent
Estimating the term…
Abstract
A thermal transfer printing sheet comprising a substrate having a coating of a disazo dye of Formula (1): ##STR1## wherein: R is selected from --H; --CN; --NO.sub.2 ; --COT.sup.1 ; --SO.sub.2 T.sup.1 ; --COOT.sup.1 ; --SO.sub.2 F; and --SO.sub.2 Cl; each R.sup.1 is independently selected from --H; --F, --Cl, --Br; and --CF.sub.3 ; n is 1, 2 or 3; R.sup.2 is --H or C.sub.1-4 -alkyl; R.sup.3 is --CN; R.sup.4 is a straight or branched chain C.sub.1-6 -alkyl; R.sup.5 is ##STR2## (sec.butyl); and R.sup.6 is selected from --H; C.sub.1-4 -alkyl; and --NHCOT.sup.1 ; wherein T.sup.1 is C.sub.1-4 -alkyl or phenyl.
Claims4
A thermal transfer printing sheet comprising a substrate having a coating of a disazo dye of Formula (1):
- ##STR5## wherein:
- R is selected from --H;
- --CN;
- --NO.sub.2 ;
- --COT.sup.1 ;
- --SO.sub.2 T.sup.1 ;
- --COOT.sup.1 ;
- --SO.sub.2 F;
- and --SO.sub.2 Cl;
- each
- R.sup.1 is independently selected from --H;
- --F, --Cl, --Br;
- and --CF.sub.3 ;
- n is 1, 2 or 3;
- R.sup.2 is --H or C.sub.1-4 -alkyl;
- R.sup.3 is --CN;
- R.sup.4 is a straight or branched chain C.sub.1-6 -alkyl;
- R.sup.5 is Sec.butyl;
- and
- R.sup.6 is elected from --H;
- C.sub.1-4 -alkyl;
- and --NHCOT.sup.1 ;
- wherein T.sup.1 is C.sub.1-4 -alkyl or phenyl.
Dependencies are inferred from the claim text.