Copolymer, coloring material dispersion, ink, and ink store container
A copolymer including a structural unit represented by General Formula (1) below and a structural unit represented by General Formula (2) below, where, in General Formula (1), R is a hydrogen atom or a methyl group and X is a hydrogen atom or a cation, where, in General Formula (2), L is an alkylene group having 2 or more but 18 or less carbon atoms.
1. A copolymer comprising:
a structural unit represented by General Formula (1) below; and
a structural unit represented by General Formula (2) below,
where, in General Formula (1), R is a hydrogen atom or a methyl group and X is a hydrogen atom or a cation,
where, in General Formula (2), L is an alkylene group having 2 or more but 18 or less carbon atoms.
2. The copolymer according to claim 1 , wherein a ratio (M1/M2) of the number of moles (M1) of the structural unit represented by General Formula (1) to the number of moles (M2) of the structural unit represented by General Formula (2) is 1/1 or greater but 3/1 or less.
3. The copolymer according to claim 1 , wherein L in General Formula (2) is an alkylene group having 2 or more but 12 or less carbon atoms.
4. The copolymer according to claim 1 , wherein the copolymer is a polymer prepared by polymerizing a compound represented by General Formula (3) below and a compound represented by General Formula (4) below,
where, in General Formula (3), R is a hydrogen atom or a methyl group and X is a hydrogen atom or a cation,
where, in General Formula (4), L is an alkylene group having 2 or more but 18 or less carbon atoms.
5. The copolymer according to claim 1 ,
wherein the cation of X in General Formula (1) is a tetraethyl ammonium ion.
6. A coloring material dispersion comprising:
water;
a coloring material; and
a copolymer,
wherein the copolymer is the copolymer according to claim 1 .
7. An ink comprising:
water;
a coloring material; and
a copolymer,
wherein the copolymer is the copolymer according to claim 1 .
8. The ink according to claim 7 ,
wherein the coloring material is a pigment.
9. The ink according to claim 7 , further comprising
at least one selected from the group consisting of an organic solvent and a surfactant.
10. An ink stored container comprising:
the ink according to claim 7 ; and
a container storing the ink.