Ink composition, inkjet recording method, and printed article

An ink composition comprising:

• (a) a polymer having a siloxane structure and a polymerizable group on a side chain thereof;
• (b) a polymerizable compound;
• (c) a photopolymerization initiator;
• and (d) a monofunctional monomer, the siloxane structure being obtained by polymerizing a compound represented by the following Formula (A):
• wherein in Formula (A), R1 is a straight chain or branched alkylene group having 2 to 6 carbon atoms or a divalent connecting group represented by the following Formula (B);
• x1, x2 and x3 are integers having a relationship such that the sum of x1, x2 and x3, (x1+x2+x3), is from 1 to 100;
• y1 is an integer of from 1 to 10;
• X is a single bond or a divalent group represented by the following Formula (C);
• Y represents a monovalent group represented by any of Formulae (D) to (F);
• and Z represents a monovalent group represented by the following Formula (G);
• wherein in Formula (B), R2 represents a hydrogen atom or a methyl group, and n represents an integer of from 1 to 50;
• —Z1—CO—NH—R3—NH—CO— Formula (C)
• wherein in Formula (C), Z1 represents an oxygen atom, a sulfur atom, or NR4;
• R4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms;
• Z1 is bonded to R1 in Formula (A);
• and R3 represents a divalent aliphatic or alicyclic group having 6 to 10 carbon atoms;
• wherein in Formulae (D) to (F), R5 represents a hydrogen atom or a straight chain or branched alkyl group having 1 to 6 carbon atoms, R6 represents a straight chain or branched alkylene group having 2 to 10 carbon atoms, and R7 represents a straight chain or branched alkylene group having 1 to 6 carbon atoms;
• wherein in Formula (G), z1 is an integer of from 3 to 100, and
• wherein the content of the polymer (a) is, with respect to the total solid content of the ink composition, from 0.1% to 10% by mass.