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US 11,958,978 B2Granted
Coloring compound and thermal transfer recording sheet
AssigneeCanon Kabuskiki Kaisha
InventorsAi Hayakawa, Masanori Seki, Koromo Shirota, Hajime Muta, Taichi Shintou, Tsuyoshi Santo
Life of this patent
Estimating the term…
Abstract
A coloring compound comprises a triphenylmethane structure having specific substituents.
Claims8
A coloring compound comprising a structure represented by formula (1-1) or formula (1-2):
- where:
- R1 and R2 each independently represents an unsubstituted alkyl group;
- R3 and R4 each independently represents a hydrogen atom or an unsubstituted alkyl group;
- R5 and R6 each independently represents a hydrogen atom or an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R7 and R8 each independently represents an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R9 represents a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group;
- R10 represents a hydrogen atom, a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group;
- and
- X− represents an anion,
- wherein in R1 to R4, the unsubstituted alkyl group is an n-butyl group, a 2-ethylhexyl group, or an octyl group;
- where:
- R1 and R2 each independently represents an unsubstituted alkyl group;
- R3 and R4 each independently represents a hydrogen atom or an unsubstituted alkyl group;
- R5 and R6 each independently represents a hydrogen atom or an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R7 and R8 each independently represent an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R9′ represents —SO3−;
- and
- R10′ represents a hydrogen atom, a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group,
- wherein in R1 to R4, the unsubstituted alkyl group is an n-butyl group, a 2-ethylhexyl group, or an octyl group.
16 more elements
A thermal transfer recording sheet comprising a substrate and a coloring material layer on the substrate,
- wherein the coloring material layer comprises a yellow dye layer including a yellow dye, a magenta dye layer including a magenta dye, and a cyan dye layer including a cyan dye, and
- wherein the cyan dye includes a coloring compound including a structure represented by formula (1-2) or formula (1-2):
- where:
- R1 and R2 each independently represents an unsubstituted alkyl group;
- R3 and R4 each independently represents a hydrogen atom or an unsubstituted alkyl group;
- R5 and R6 each independently represents a hydrogen atom or an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R7 and R8 each independently represents an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R9 represents a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group;
- R10 represents a hydrogen atom, a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group;
- and
- X− represents an anion,
- wherein in R1 to R4, the unsubstituted alkyl group is an n-butyl group, a 2-ethylhexyl group, or an octyl group;
- where:
- R1 and R2 each independently represents an unsubstituted alkyl group;
- R3 and R4 each independently represents a hydrogen atom or atom, an unsubstituted alkyl group;
- R5 and R6 each independently represents a hydrogen atom or an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R7 and R8 each independently represent an unsubstituted alkyl group having 1 to 4 carbon atoms;
- R9′ represents —SO3−;
- and
- R10′ represents a hydrogen atom, a halogen atom, a nitro group, a sulfo group, a sulfonic acid ester group, a sulfonamide group, a sulfonic acid salt group, a benzenesulfonyl group, a trifluoromethylsulfonyl group, or a perfluoroalkyl group,
- wherein in R1 to R4, the unsubstituted alkyl group is an n-butyl group, a 2-ethylhexyl group, or an octyl group.
18 more elements
Dependencies are inferred from the claim text.