Curable water-based composition, active-energy-ray-curable water-based composition, active-energy-ray-curable water-based ink, stored container, two-dimensional or three-dimensional image forming apparatus, two-dimensional or three-dimensional image forming method, cured product, and decorated body
Provided is a curable water-based composition including water, a polymerizable compound (A), and a polymerization initiator (C). The polymerizable compound (A) contains an acrylamide compound (A1) represented by General formula (A1) below. In the General formula (A1), X represents an alkylene group containing from 1 through 6 carbon atoms, and Y represents a group represented by General formula (A1a) below or General formula (A1b) below, In the General formula (A1a), R 1 represents an alkyl group containing from 1 through 10 carbon atoms, and * represents a bonding site with X, In the General formula (A1b), R 1 represents an alkyl group containing from 1 through 10 carbon atoms, and * represents a bonding site with X.
1 . A hydrogel, comprising
a reaction product of an acrylamide compound (A1) represented by General formula (A1) below with an acrylamide compound (B1) represented by General formula (B1) below or an acrylamide compound (A2) represented by General formula (A2-1) below or General formula (A2-2) below,
where in the General formula (A1), X represents an alkylene group containing from 1 through 6 carbon atoms, and Y represents a group represented by General formula (A1a) below or General formula (A1b) below,
where in the General formula (A1a), R 1 represents an alkyl group containing from 1 through 10 carbon atoms, and * represents a bonding site with X,
where in the General formula (A1b), R 1 represents an alkyl group containing from 1 through 10 carbon atoms, and * represents a bonding site with X,
where in the General formula (B1), R 2 represents a hydrogen atom or an alkyl group containing from 1 through 4 carbon atoms and may have a branched structure, R 3 represents a hydrogen atom or a methyl group, and Z represents an alkylene group containing from 1 through 30 carbon atoms or a group obtained by substituting oxygen, nitrogen, and sulfur atoms for some of the carbon atoms of the alkylene group containing from 1 through 30 carbon atoms and may contain a polar functional group, a (meth)acrylate group, or a (meth)acrylamide group as a substituent,
where in the General formula (A2-1), R 4 represents an alkyl group containing from 1 through 6 carbon atoms, X represents an alkylene group containing from 1 through 6 carbon atoms, and Y represents a group represented by General formula (A2a-1) below or General formula (A2b-1) below,
where in the General formula (A2a-1), R 5 represents an alkyl group containing form 1 through 10 carbon atoms, and * represents a bonding site with X,
where in the General formula (A2b-1), R 5 represents an alkyl group containing from 1 through 10 carbon atoms, and * represents a bonding site with X,
where in the General formula (A2-2), a ring X 1 represents a nitrogen atom-containing ring structure containing from 2 through 5 carbon atoms, R 6 represents a single bond or an alkylene group containing from 1 through 3 carbon atoms, and R 7 represents a straight-chained or branched alkyl group containing from 1 through 10 carbon atoms.
2 . The hydrogel according to claim 1 ,
wherein acrylamide compound (B1) is used.
3 . The hydrogel according to claim 2 ,
wherein a total amount of the acrylamide compound (A1) and the acrylamide compound (B1) is 30% by mass or greater relative to a total amount of the curable water-based composition.
4 . The hydrogel according to claim 1 ,
comprising compound (A2).
5 . The hydrogel according to claim 1 ,
formed from a curable water-based composition having a viscosity of 30 mPa·s or lower.
6 . The hydrogel according to claim 5 , wherein the curable water-based composition comprises a polymerization initiator (C) which is a radical polymerization initiator and is water-soluble.
7 . The hydrogel according to claim 5 , wherein the curable water-based composition further comprises a hydrogen donor (D).
8 . The hydrogel according to claim 1 , further comprising a pigment.
9 . The hydrogel according to claim 5 ,
wherein an amount of the water is 10% by mass or greater but 50% by mass or less relative to a total amount of the curable water-based composition.
10 . The hydrogel according to claim 1 ,
wherein the acrylamide compound (A1) is used, Y is a group represented by the General formula (A1b), and R 1 is an alkyl group containing 1 or 2 carbon atoms.
11 . A decorated body, comprising:
a base material; and
a surface decoration on the base material,
the surface decoration being formed of the hydrogel according to claim 1 .
12 . The hydrogel according to claim 1 , comprising (A2-1).
13 . The hydrogel according to claim 1 , comprising (A2-2).
14 . The hydrogel according to claim 1 , comprising the reaction product of an acrylamide compound (A1) with the acrylamide compound (B1).
15 . The hydrogel according to claim 14 , wherein Y represents a group represented by General formula (A1a).
16 . The hydrogel according to claim 14 , wherein Y represents a group represented by General formula (A1b).
17 . The hydrogel according to claim 12 , wherein Y represents a group represented by General formula (A2a-1).
18 . The hydrogel according to claim 12 , wherein Y represents a group represented by General formula (A2b-1).
19 . The hydrogel according to claim 14 , further comprising (A2).