Claims
- 1. A dye donor element for use according to thermal dye transfer methods comprising a support having thereon a dye layer comprising a binder and a yellow dye of the class of N-alkyl-N-para-aminoaryl-substituted dicyanovinylaniline dyes corresponding to the following general formula (I): ##STR20## wherein: X represents a substituent selected from the group consisting of an alkenyl group, an aryl group, a halogen, an acylamino group, an aminocarbonyl group, an alkoxy group, an aryloxy group and an alkenyloxy group,
- Aryl represents an aryl group para substituted with NR.sup.1 R.sup.2,
- R represents an alkyl group,
- R.sup.1, R.sup.2 each independently represents hydrogen, an alkyl group, an aryl group or R.sup.1 and R.sup.2 together with the atoms to which they are attached represent the necessary atoms to complete a ring system.
- 2. A dye donor element according to claim 1 wherein said dye layer further comprises a cyan dye and/or a magenta dye.
- 3. A dye donor element according to claim 2 wherein said dye layer comprises a repeating sequence of a yellow, magenta and cyan dye frame and wherein said yellow dye frame comprises said yellow dye, said magenta dye frame comprises a magenta dye and said cyan dye frame comprises a cyan dye.
- 4. A dye donor element according to claim 3 wherein said magenta dye frame comprises a magenta dye having the following general formula (II): ##STR21## wherein Z represents hydrogen or a substituent consisting of an alkyl group, an alkenyl group, an aryl group, a halogen, an acylamino group, an aminocarbonyl group, an alkoxy group, an aryloxy group and an alkenyloxy group,
- Aryl represents an aryl group and
- R' represents an alkyl group.
- 5. A dye donor element according to claim 3 wherein said cyan dye frame comprises a cyan dye having the following general formula (III): ##STR22## wherein Z' represents CN, COOR.sup.19, or CONR.sup.20 R.sup.21 ;
- R.sup.19, R.sup.20, and R.sup.21 each independently represent hydrogen, alkyl, aryl, or R.sup.20 and R.sup.21 together with the atoms to which they are attached represent the atoms needed to complete a heterocyclic ring;
- Y' represents OR.sup.22 or NR.sup.23 R.sup.24, or CN or a phenyl group;
- R.sup.22 represents hydrogen, alkyl, aryl, SO.sub.2 R.sup.25, COR.sup.25, CSR.sup.25, or POR.sup.25 R.sup.26 ;
- R.sup.23 and R.sup.24 each independently represents hydrogen, alkyl, aryl, an amino group, SO.sub.2 R.sup.25, COR.sup.25, CSR.sup.25, POR.sup.25 R.sup.26, or R.sup.23 and R.sup.24 together with the atoms to which they are attached represent the atoms needed to complete a heterocyclic ring;
- R.sup.25 and R.sup.26 each independently represent alkyl, alkenyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, an amino group or a heterocyclic ring or R25 and R.sup.26 together with the atoms to which they are attached represent the atoms needed to complete a 5- or 6-membered ring;
- X' represents N--Ar or N--Het;
- Ar represents an aromatic ring substituted in para position by a substituent chosen from the group consisting of an amino group, alkoxy, aryloxy, alkylthio, arylthio, hydroxy, or mercapto and Het represents a heterocyclic ring.
- 6. A method for making an image using a thermal imaging system consisting of a dye donor element as defined in any of claims 1 to 5 and an image receiving element having on a support an image receiving layer, said method comprising the steps of:
- bringing the dye layer of said donor element in face-to-face relationship with the receiving layer of said receiving element,
- image-wise heating a thus obtained assemblage and
- separating said donor element from said receiving element, wherein said yellow dye corresponds to the following general formula (I): ##STR23## wherein: X represents a substituent selected from the group consisting of an alkenyl group, an aryl group, a halogen, an acylamino group, an aminocarbonyl group, an alkoxy group, an aryloxy group and an alkenyloxy group,
- Aryl represents an aryl group para substituted with NR.sup.1 R.sup.2,
- R represents an alkyl group,
- R.sup.1, R.sup.2 each independently represents hydrogen, an alkyl group, an aryl group or R.sup.1 and R.sup.2 together with the atoms to which they are attached represent the necessary atoms to complete a ring system.
Priority Claims (1)
Number |
Date |
Country |
Kind |
94201480 |
May 1994 |
EPX |
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Parent Case Info
This is a continuation-in-part of U.S. Ser. No. 08/426,984 filed Apr. 21, 1995, now U.S. Pat. No. 5,514,638.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5397762 |
Vanmaele et al. |
Mar 1995 |
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5514638 |
Vanmaele et al. |
May 1996 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
426984 |
Apr 1995 |
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