Imaging compositions, imaging methods and imaging members
View Patent ↗There are described imaging compositions which include a copper phthalocyanine dye and an aminoanthraquinone dye and thermal imaging members and ink jet inks which utilize the imaging compositions. Thermal imaging methods utilizing the thermal imaging members and ink jet imaging methods utilizing the ink jet inks are also described.
1. A thermal transfer imaging member comprising a substrate carrying a solid layer of a thermal image-forming material comprising a copper phthalocyanine dye and an aminoanthraquinone dye represented by the formula
wherein
R is selected from:
a. hydrogen;
b. alkyl, straight-chain or branched;
c. hydroxyalkyl;
d. aryl; and
e. substituted aryl;
X and Y are each independently selected from:
a. hydrogen;
b. halogen;
c. —OH;
d. —NHR, where R is as previously defined; or
e. X or Y, independently, together with two of the carbon atoms of the ring moiety to which X or Y is attached, represents the carbon, nitrogen or oxygen atoms necessary to form a 5 or 6 member carbocyclic or heterocyclic ring containing one or more carbonyl groups; and
m and n are each independently integers of from 1 to 3.
2. A thermal imaging member as defined in claim 1 wherein said layer of thermal image-forming material includes from about 1 to about 2 molar equivalents of copper phthalocyanine dye to about 1 molar equivalent of aminoanthraquinone dye.
3. A thermal imaging member as defined in claim 1 wherein said copper phthalocyanine dye is selected from Solvent Blue 44, Solvent Blue 67, Solvent Blue 70, and mixtures thereof.
4. A thermal imaging member as defined in claim 1 wherein said aminoanthraquinone dye is selected from Disperse Blue 3, Disperse Blue 7, Disperse Blue 14, Disperse blue 56, Disperse Blue 60, Solvent Blue 14, Solvent Blue 35, Solvent Blue 59, Solvent Blue 104, Solvent Green 3, Solvent Green 28, Disperse Violet 1 and mixtures thereof.
5. A thermal imaging member as defined in claim 1 wherein said layer of thermal image-forming material comprises a dye-containing amorphous phase comprising said copper phthalocyanine dye and said aminoanthraquinone dye, wherein said dyes form a continuous film.
6. A thermal imaging member as defined in claim 5 wherein said layer of thermal image-forming material further includes a thermal solvent, at least a portion of said thermal solvent forming a separate crystalline phase.
7. A thermal imaging member as defined in claim 6 wherein said thermal solvent has a melting point above about 50.degree. C.
8. A thermal imaging member as defined in claim 5 wherein said layer of image-forming material has a thickness not greater than about 1 μm.
9. A thermal transfer imaging method comprising heating a thermal imaging member as defined in claim 1 and imagewise transferring portions of the thermal image-forming material to a receiver member which is in contact with said thermal imaging member.
10. A thermal imaging method as defined in claim 9 wherein said layer of thermal image-forming material includes from about 1 to about 2 molar equivalents of copper phthalocyanine dye to about 1 molar equivalent of aminoanthraquinone dye.
11. A thermal imaging method as defined in claim 9 wherein said copper phthalocyanine dye is selected from Solvent Blue 44, Solvent Blue 67, Solvent Blue 70, and mixtures thereof.
12. A thermal imaging method as defined in claim 9 wherein said aminoanthraquinone dye is selected from Disperse Blue 3, Disperse Blue 7, Disperse Blue 14, Disperse blue 56, Disperse Blue 60, Solvent Blue 14, Solvent Blue 35, Solvent Blue 59, Solvent Blue 104, Solvent Green 3, Solvent Green 28, Disperse Violet 1 and mixtures thereof.
13. A thermal imaging method as defined in claim 9 wherein said layer of thermal image-forming material comprises a dye-containing amorphous phase comprising said copper phthalocyanine dye and said aminoanthraquinone dye, wherein said dyes form a continuous film.
14. A thermal imaging method as defined in claim 13 wherein said layer of thermal image-forming material further includes a thermal solvent, at least a portion of said thermal solvent forming a separate crystalline phase.
15. A thermal imaging method as defined in claim 13 wherein said thermal solvent has a melting point above about 50.degree. C.
16. A thermal imaging method as defined in claim 13 wherein said layer of image-forming material has a thickness not greater than about 1 .mu.m.