Ink composition
An ink composition contains a solid component, a hydrophobic solvent A, a hydrophilic solvent B, and an amphiphilic solvent C, wherein the solvent C is an alcohol having 8 or more carbon atoms.
1. An ink composition comprising:
a solid component;
a hydrophobic solvent A that contains at least one compound selected from aromatic compounds and hydrocarbon-based compounds;
a hydrophilic solvent B that contains at least one compound selected from glycol ether-based compounds and alkane diol-based compounds; and
an amphiphilic solvent C,
wherein:
the solvent C is a monohydric alcohol having 8 or more carbon atoms, and
the viscosity of the solvent A at normal temperature is lower than that of the solvent B.
2. The ink composition according to claim 1 , wherein
the solvent A contains at least one compound selected from aromatic compounds and at least one compound selected from hydrocarbon-based compounds, and
the solvent B contains at least one compound selected from glycol ether-based compounds and at least one compound selected from alkane diol-based compounds.
3. The ink composition according to claim 1 , wherein
the aromatic compounds are diisopropylbenzene, cyclohexylbenzene, diphenyl ether, 3-phenoxytoluene, and bis(dimethylphenyl)ethane, and
the hydrocarbon-based compounds are decane, undecane, dodecane, tridecane, tetradecane, pentadecane, and hexadecane.
4. The ink composition according to claim 1 , wherein
the glycol ether-based compounds are diethylene glycol, triethylene glycol, dipropylene glycol, and tetraethylene glycol, and
the alkane diol-based compounds are 1,2-ethanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 1,5-pentanediol, 2-methyl-2,4-pentanediol, 1,6-hexanediol, and 2-ethyl-1,3-hexanediol.
5. The ink composition according to claim 1 , wherein the solvent C contains at least one alcohol selected from 1-octanol, 1-nonanol, 1-decanol, 1-undecanol, 1-dodecanol, 1-tridecanol, 2-nonanol, and 2-undecanol.
6. The ink composition according to claim 1 , wherein the content ratio of the solvent C with respect to the ink is 1 mass % or more.
7. The ink composition according to claim 2 , wherein as the solvent A, a naphthene-based compound is contained.
8. The ink composition according to claim 1 , wherein the solvent A further contains 7-ethyl-2-methyl-4-undecanol.
9. The ink composition according to claim 1 , wherein as the solid component, a functional layer forming material is contained.
10. The ink composition according to claim 9 , wherein the functional layer forming material is a material for forming one layer selected from a functional layer composed of multiple layers including a light-emitting layer of an organic EL element.
11. The ink composition according to claim 1 , wherein as the solid component, a color material is contained.
12. The ink composition according to claim 1 , wherein
as the solid component, a light transmissive resin which does not contain a color material is contained, and
the content ratio of the resin is 0.1 mass % or more and 10 mass % or less.
13. An ink composition comprising:
a solid component;
a hydrophobic solvent A;
a hydrophilic solvent B; and
an amphiphilic solvent C,
wherein:
the solvent C is an alcohol having 8 or more carbon atoms, and
the content ratio of the solvent C with respect to the ink is 1 mass % or more.
14. An ink composition comprising:
a solid component;
a hydrophobic solvent A that contains at least one compound selected from aromatic compounds and hydrocarbon-based compounds;
a hydrophilic solvent B that contains at least one compound selected from glycol ether-based compounds and alkane diol-based compounds; and
an amphiphilic solvent C,
wherein:
the solvent C is a monohydric alcohol having 8 or more carbon atoms,
the glycol ether-based compounds are diethylene glycol, triethylene glycol, dipropylene glycol, and tetraethylene glycol, and
the alkane diol-based compounds are 1,2-ethanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 1,5-pentanediol, 2-methyl-2,4-pentanediol, 1,6-hexanediol, and 2-ethyl-1,3-hexanediol.