Ultraviolet-curable ink jet composition and storage body thereof
There is provided an ultraviolet-curable ink jet composition, which is stored in an storage body, including a pigment; a pigment dispersant; a polymerizable compound; and a photopolymerization initiator, in which water content is 0.05 mass % to 1.0 mass % based on the total amount of the ultraviolet-curable ink jet composition, and in which both the acid value and the amine value of the pigment dispersant are 50 mgKOH/g or less, and at least one of the acid value and the amine value thereof is 10 mgKOH/g or more.
1. An ultraviolet-curable ink jet composition, which is stored in a storage body, comprising:
a pigment;
a pigment dispersant;
a polymerizable compound; and
a photopolymerization initiator,
wherein water content is 0.05 mass % to 1.0 mass % based on the total amount of the ultraviolet-curable ink jet composition, and
wherein both the acid value and the amine value of the pigment dispersant are 50 mgKOH/g or less, and at least one of the acid value and the amine value thereof is 10 mgKOH/g or more,
wherein the composition comprises a polymerizable compound having a vinyl ether group and a (meth)acrylate group as the polymerizable compound, and
wherein the composition comprises a (meth)acrylic acid ester containing a vinyl ether group represented by general formula (1) below:
CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 (1)
(here, R 1 is a hydrogen atom or a methyl group, R 2 is a divalent organic residue of 2 to 20 carbon atoms, and R 3 is a hydrogen atom or a monovalent organic residue of 1 to 11 carbon atoms) as the polymerizable compound having a vinyl ether group and a (meth)acrylate group.
2. The ultraviolet-curable ink jet composition according to claim 1 ,
wherein the total amount of the acid value and the amine value of the pigment dispersant are 15 mgKOH/g to 90 mgKOH/g.
3. A storage body, which stores the ultraviolet-curable ink jet composition according to claim 2 .
4. The ultraviolet-curable ink jet composition according to claim 1 ,
wherein the composition comprises a radical polymerizable compound as the polymerizable compound.
5. A storage body, which stores the ultraviolet-curable ink jet composition according to claim 4 .
6. The ultraviolet-curable ink jet composition according to claim 1 ,
wherein the composition comprises an acylphosphine oxide compound as the photopolymerization initiator.
7. A storage body, which stores the ultraviolet-curable ink jet composition according to claim 6 .
8. The ultraviolet-curable ink jet composition according to claim 1 ,
wherein the polymerizable compound having a vinyl ether group and a (meth)acrylate group is included in an amount of 10 mass % to 70 mass % based on the total amount of the ultraviolet-curable ink jet composition.
9. A storage body, which stores the ultraviolet-curable ink jet composition according to claim 8 .
10. The ultraviolet-curable ink jet composition according to claim 1 ,
wherein the (meth)acrylic acid ester containing a vinyl ether group is 2-(vinyloxyethoxy) ethyl acrylate.
11. A storage body, which stores the ultraviolet-curable ink jet composition according to claim 10 .
12. A storage body, which stores the ultraviolet-curable ink jet composition according to claim 1 .
13. The storage body according to 12 ,
wherein the storage body is configured such that a container made of a member having an oxygen permeability of 0.01 cc to 5.0 cc·20 μm/(m 2 ·day·atm) at a temperature of 23° C. and a humidity of 65% is filled with the ultraviolet-curable ink jet composition, or is configured such that a container filled with the ultraviolet-curable ink jet composition is sealed with a package made of a member having an oxygen permeability of 0.01 cc to 5.0 cc·20 μm/(m 2 ·day·atm) at a temperature of 23° C. and a humidity of 65%.