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1. WO2009073675 - ÉLÉMENTS DONNEURS DE COLORANT PAR TRANSFERT THERMIQUE CONTENANT DES HYDROXYDES MÉTALLIQUES, ET PROCESSUS D'ENREGISTREMENT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS
What is claimed is:

1. A thermal transfer donor element comprising:

a. a support;

b. a thermal transfer layer disposed upon the support, wherein the thermal transfer layer is derived from a composition comprising a polycarboxylic acid, a polyhydroxy compound, and a basic crosslinking agent selected from the group consisting of alkali metal hydroxides; and

c. a laser dye.

2. The donor element of claim 1 , wherein the polycarboxylic acid is a copolymer comprising repeat units derived from: styrene, and a carboxylic comonomer selected from the group consisting of acrylic acids, methacrylic acids, and combinations thereof.

3. The donor element of claim 2, wherein the copolymer has a molecular weight of 2,000 to 50,000 g/mole.

4. The donor element of claim 1 , wherein the polyhydroxy compound is selected from the group consisting of:

a. 7,7,1 1 ,1 1-tetrakis[2-(2-hydroxyethoxy)ethoxy]- 3,6,9,12,15-pentaoxahepta-decane-1 , 17-diol; and

b. N1 ,N1 ,N7,N7- tetrakis (2-hydroxyethyl)heptanediamide.

5. The donor element of claim 1 , wherein the basic crosslinking agent is an alkali metal hydroxide selected from the group consisting of lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide and cesium hydroxide.

6. The donor element of claim 1 , wherein the thermal transfer layer further comprises a colorant selected from the group consisting of organic pigments, inorganic pigments, dyes, and combinations thereof.

7. The donor element of claim 6, wherein the colorant is selected from the group of red pigments, blue pigments, green pigments, yellow pigments, carbon black and laser dyes.

8. The donor element of claim 7, wherein the green pigment comprises a copper phthalocyanine complex and the yellow pigment comprises an azobarbituric acid metal complex.

9. The donor element of claim 8, wherein the copper phthalocyanine complex is selected from the group consisting of:

a. copper, (1 ,3,8,16,18,24-hexabromo- 2,4,9, 10,1 1 ,15,17,22,23,25-decachlorophthalocyaninato(2-)); and

b. copper, [tridecachloro-29H,31 H-phthalocyaninato(2-)- N29,N30,N31 ,N32]-; and the yellow pigment comprises nickel, [[5,5'- (azo-DN1 )bis[2,4,6 (1 H.3H.5H) -pyrimidinetrionato-DO4]](2-)]-, compound with 1 ,3,5-triazine-2,4,6-triamine.

10. The donor element of claim 1 , wherein the laser dye is 1 H-benz[e]indolium, 2-[2-[2-chloro-3-[[1 ,3-dihydro-1 ,1-dimethyl-3-(4-sulfobutyl)- 2H-benz[e]indol-2-ylidene]ethylidene]-1-cyclohexen-1-yl]ethenyl]- 1 ,1-dimethyl-3-(4-sulfobutyl)-, inner salt.

11. The donor element of claim 1 , wherein the thermal transfer layer further comprises a surfactant and a defoaming agent.

12. The donor element of claim 11 , wherein the surfactant comprises a salt of a 3-[2-(perfluoroalkyl)ethylthio]propionate and the defoaming agent comprises an acetylenic glycol nonionic surfactant.

13. The donor element of claim 1 , further comprising a heating layer disposed between the support and the thermal transfer layer.

14. The donor element of claim 13, wherein the heating layer comprises a material selected from the group consisting of carbon black, scandium, titanium, chromium, manganese, iron, cobalt, nickel, copper, ruthenium, rhodium, palladium, silver, gold, and hafnium; aluminum, gallium, tin, lead and alloys thereof; metal oxides; and alloys of aluminum, gallium, tin, or lead with sodium, lithium, calcium, magnesium, or strontium; poly(substituted) phthalocyanine compounds and metal-containing phthalocyanine compounds; cyanine dyes; squarylium dyes; croconium dyes; metal thiolate dyes; oxyindolizine dyes; bis(chalcogenopyrylo)polymethine dyes; bis(aminoaryl)polymethine dyes; merocyanine dyes; and quinoid dyes.

15. The donor element of claim 1 , wherein the laser dye is present in the transfer layer, or is present in a heating layer disposed between the support and the thermal transfer layer, or is present in both the transfer layer and the heating layer..

16. The donor element of claim 1 , wherein the support is selected from the group consisting of polyester films, polyolefin films, polyamide films, paper, sheets of glass, and fluoro-olefin films.

17. A process comprising:

a. coating a support with a composition comprising:

(i) a polycarboxylic acid;

(ii) a polyhydroxy compound;

(iii) a basic crosslinking agent selected from
the group consisting of alkali metal
hydroxides; and

(iv) a laser dye; and

b. heating the coated support.

18. The process of claim 17, wherein the composition is an aqueous composition and the polycarboxylic acid comprises 25 to 40 wt% of the composition, the basic crosslinking agent comprises 2 to 10 wt% of the composition and the polyhydroxy compound comprises 1 to 15 wt% of the composition.

19. The process of claim 18, wherein the aqueous composition further comprises a colorant selected from the group consisting of an organic pigment, an inorganic pigment, a dye, a color-forming dye and combinations thereof.

20. The process of claim 17, wherein the heating comprises (i) heating the coated support from 40 oC to 60 oC to obtain a dry film; and (ii) heating the dry film from 200 oC to 300 oC to form an annealed film.

21. An imageable assemblage comprising:

a. a donor element comprising a transparent donor support having a first and second surface, and a thermal transfer layer disposed on the second surface of the transparent donor support, wherein the thermal transfer layer is derived by heating to 40 oC to 60 oC a composition comprising a polycarboxylic acid, a polyhydroxy compound, and a basic crosslinking agent selected from the group consisting of alkali metal hydroxides; and

b. a receiver in contact with the thermal transfer layer of the donor element.

22. The imageable assemblage of Claim 21 , wherein the donor element further comprises a heating layer disposed between the donor support and the thermal transfer heating layer.

23. A process comprising:

a. directing laser radiation to a first surface of a transparent donor support of a donor element of an imageable assemblage, wherein the imageable assemblage comprises a donor element comprising a transparent donor support with a first and second surface, and a thermal transfer layer disposed on the second surface of the support; and a receiver in contact with the thermal transfer layer of the donor element;

b. heating a portion of the thermal transfer layer to cause it to transfer to the receiver; and

c. separating the receiver from the donor element.