Copolymer, ink, and ink container
A copolymer includes the structure unit represented by the following Chemical formula 1 and the structure unit represented by the following Chemical formula 2, where R 1 and R 2 each, independently represent hydrogen atoms or methyl groups, and n represents a value in the range of from 1 to 90, where R 3 represents a hydrogen atom or a methyl group and L represents an alkylene group having 2 to 18 carbon atoms.
1. A copolymer comprising,
a structure unit represented by the following Chemical formula 1; and
a structure unit represented by the following Chemical formula 2,
where R 1 and R 2 each, independently represent hydrogen atoms or methyl groups, and n represents a value in the range of from 1 to 90,
where R 3 represents a hydrogen atom or a methyl group and L represents an alkylene group having 2 to 18 carbon atoms.
2. The copolymer according to claim 1 , wherein a molar ratio of the structure unit represented by Chemical formula 1 to the structure unit represented by Chemical formula 2 is from 0.5:1.0 to 5.0:1.0.
3. The copolymer according to claim 1 , further comprising a structure unit represented by the following Chemical formula 3,
where R 4 represents a hydrogen atom or a methyl group and X represents a hydrogen atom or a cation.
4. The copolymer according to claim 3 , wherein a molar ratio of the structure unit represented by Chemical formula 1 to the structure unit represented by Chemical formula 2 to the structure unit represented by Chemical formula 3 is from 0.8:1.0:1.5 to 1.5:1.0:2.4.
5. The copolymer according to claim 1 , further comprising a structure unit represented by the following Chemical formula 7,
where R 5 represents a hydrogen atom or a methyl group.
6. The copolymer according to claim 5 , wherein a molar ratio of the structure unit represented by Chemical formula 1 to the structure unit represented by Chemical formula 2 to the structure unit represented by Chemical formula 7 is from 1.0:1.0:0.3 to 3.0:1.0:0.8.
7. The copolymer according to claim 1 , further comprising a structure unit represented by the following Chemical formula 9,
where R 6 represents a hydrogen atom or a methyl group, R 7 represents —O— or —NH—, R 8 represents a substituted or non-substituted alkylene group having 1 to 5 carbon atoms, R 9 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and a and b each, independently represent 0 or 1.
8. The copolymer according to claim 7 , wherein a molar ratio of the structure unit represented by Chemical formula 1 to the structure unit represented by Chemical formula 2 to the structure unit represented by Chemical formula 9 is from 1.0:1.0:0.2 to 6.0:1.0:0.5.
9. The copolymer according to claim 1 , further comprising a structure unit represented by the following Chemical formula 11,
where R 10 represents a hydrogen atom or a methyl group, R 11 represents —O— or —NH—, R 12 represents a substituted or non-substituted alkylene group having 1 to 5 carbon atoms, R 13 represents an alkyl group having 1 to 5 carbon atoms, Y − represents an anionic species, and a and b each, independently represent 0 or 1.
10. The copolymer according to claim 9 , wherein a molar ratio of the structure unit represented by Chemical formula 1 to the structure unit represented by Chemical formula 2 to the structure unit represented by Chemical formula 11 is from 1.0:1.0:0.05 to 6.0:1.0:0.5.
11. The copolymer according to claim 1 , further comprising a structure unit represented by the following Chemical formula 13,
where R 14 represents a hydrogen atom or a methyl group.
12. The copolymer according to claim 11 , wherein a molar ratio of the structure unit represented by Chemical formula 1 to the structure unit represented by Chemical formula 2 to the structure unit represented by Chemical formula 13 is from 1.0:1.0:0.05 to 5.0:1.0:1.0.
13. The copolymer according to claim 1 , wherein R 2 in the structure unit represented by Chemical formula 1 represents a hydrogen atom.
14. The copolymer according to claim 1 , wherein L in the structure unit represented by Chemical formula 2 represents an alkylene group having 2 to 12 carbon atoms.
15. An ink comprising:
water;
a colorant; and
the copolymer of claim 1 .
16. The ink according to claim 15 , wherein the colorant is a pigment.
17. The ink according to claim 15 , further comprising at least one of a water soluble organic solvent or a surfactant.
18. An ink container comprising:
an ink containing unit; and
an ink contained in the ink containing unit, the ink including water, a colorant, and a copolymer including a structure unit represented by the following Chemical formula 1 and a structure unit represented by the following Chemical formula 2,
where R 1 and R 2 each, independently represent hydrogen atoms or methyl groups, and n represents a value in the range of from 1 to 90,
where R 3 represents a hydrogen atom or a methyl group and L represents an alkylene group having 2 to 18 carbon atoms.