Photosensitive inkjet ink
View Patent ↗There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R 13 —R 14 —(R 13 )p (wherein R 13 (s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R 13 (s) is vinyl ether group or a group having a vinyl ether skeleton, R 14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).
1. An inkjet ink comprising:
a photo-acid generating agent which is capable of generating an acid as it is irradiated with light;
a color component; and
an acid-polymerizable compound which can be polymerized in the presence of an acid;
wherein the acid-polymerizable compound comprises a compound selected from the compounds represented by the following chemical formulas:
2. The inkjet ink according to claim 1 , wherein the acid-polymerizable compound further includes at least one compound selected from a cyclic carbonate compound and a cyclic lactone compound.
3. The inkjet ink according to claim 1 , wherein the acid-polymerizable compound further includes an oxetane compound.
4. The inkjet ink according to claim 1 , wherein the acid-polymerizable compound further includes diglycidyl ether of neopentylglycol.
5. The inkjet ink according to claim 1 , further comprising at least one compound selected from the group consisting of a basic compound and a compound expressing basicity and exhibiting a pKb ranging from 3 to 7 at a temperature of 25° C.
6. The inkjet ink according to claim 1 , wherein at least 40% by weight of the acid-polymerizable compound is a compound represented by the chemical formulas, and the viscosity of said ink is not higher than 12 mPa·sec at a temperature of 25° C.
7. The inkjet ink according to claim 6 , further comprising at least one compound selected from the group consisting of a basic compound and a compound expressing basicity and exhibiting a pKb ranging from 3 to 7 at a temperature of 25° C.
8. The inkjet ink according to claim 1 , wherein at least 40% by weight of the acid-polymerizable compound is a compound represented by the the chemical formulas, and said ink further comprising an epoxy compound and/or oxetane compound each having a solubility parameter of 19 MPa 1/2 or more.
9. The inkjet ink according to claim 8 , further comprising at least one compound selected from the group consisting of a basic compound and a compound expressing basicity and exhibiting a pKb ranging from 3 to 7 at a temperature of 25° C.
10. The inkjet ink according to claim 1 , wherein at least 40% by weight of the acid-polymerizable compound is a compound represented by the chemical formulas, and said ink further comprising an epoxy compound and/or oxetane compound each having a viscosity exceeding 500 mPa·sec at a temperature of 25° C.
11. The inkjet ink according to claim 10 , further comprising at least one compound selected from the group consisting of a basic compound and a compound expressing basicity and exhibiting a pKb ranging from 3 to 7 at a temperature of 25° C.