Ink jet ink and recorded object
The ink jet ink includes pigment, first resin which has a glass-transition temperature of less than 20° C. and a weight-average molecular weight of not more than 10000, second resin which has a glass-transition temperature of not less than 23° C., and specific polyoxyalkylene glycol monoalkyl ether.
1. Ink jet ink comprising:
a pigment;
a first resin (A) with a glass-transition temperature of less than 20° C. and a weight-average molecular weight of not more than 10000;
a second resin (B) with a glass-transition temperature of not less than 23° C.; and
a polyoxyalkylene glycol monoalkyl ether (C), the polyoxyalkylene glycol monoalkyl ether (C) being either a compound (C1) or a compound (C2)
wherein compound (C1) has the following formula (1):
wherein in the formula (1), R represents an x-valent alkoxy group containing four to thirty carbons, PO represents a propyleneoxy group, EO represents an ethyleneoxy group, m represents an integer from zero to ten, n represents an integer from ten to thirty, and X represents an integer from one to three, and
wherein compound (C2) has the following formula (2):
wherein in the formula (2), R represents an x-valent alkoxy group containing four to thirty carbons, EO represents an ethyleneoxy group, and n represents an integer from four to twenty.
2. The ink jet ink according to claim 1 ,
wherein a content ratio on a mass % basis of the polyoxyalkylene glycol monoalkyl ether (C) with respect to sum of content of the first resin (A) and the second resin (B) is not less than 0.25 and not more than 0.50.
3. The ink jet ink according to claim 1 ,
wherein a content ratio on a mass % basis of the compound (C1) with respect to sum of the content of the first resin (A) and the second resin (B) is not less than 0.30 and not more than 0.50.
4. The ink jet ink according to claim 1 ,
wherein a content ratio on a mass % basis of the compound (C2) with respect to sum of the content of the first resin (A) and the second resin (B) is not less than 0.25 and not more than 0.50.
5. The ink jet ink according to claim 1 ,
wherein a weight-average molecular weight of the second resin (B) is more than 10000.
6. The ink jet ink according to claim 1 ,
wherein the first resin (A) is at least one kind selected from a group consisting of styrene acrylate copolymer and polyurethane resin.
7. The ink jet ink according to claim 1 ,
wherein the second resin (B) is at least one kind selected from a group consisting of styrene acrylate copolymer and polyurethane resin.
8. The ink jet ink according to claim 1 , further comprising:
an amphoteric ion compound.
9. The ink jet ink according to claim 6 ,
wherein the amphoteric ion compound is a betaine series compound with a molecular weight of not less than 100 and not more than 250.
10. The ink jet ink according to claim 8 ,
wherein the content of the amphoteric ion compound is not less than 5% by mass and not more than 40% by mass.