Photocurable resin composition, ink and coating material

A photocurable resin composition comprising:

• a styrene-acrylate copolymer;
• a monomer having a radically polymerizable double bond;
• and a photopolymerization initiator, wherein in the styrene-acrylate copolymer,
• a proportion of a constituent unit (A) derived from the styrene-based compound is 10 to 90 mol %,
• a proportion of a constituent unit (B) derived from the acrylate compound is 10 to 90 mol %, and
• the constituent unit (B) derived from the acrylate compound contains a constituent unit (b-1) derived from a compound having at least three (meth)acryloyl groups in a molecule.

A photocurable resin composition comprising:

• a styrene-acrylate copolymer;
• a monomer having a radically polymerizable double bond;
• a photopolymerization initiator;
• and a sensitizer, wherein in the styrene-acrylate copolymer,
• a proportion of a constituent unit (A) derived from the styrene-based compound is 10 to 90 mol %,
• a proportion of a constituent unit (B) derived from the acrylate compound is 10 to 90 mol %, and
• the constituent unit (B) derived from the acrylate compound contains a constituent unit (b-1) derived from a compound having at least three (meth)acryloyl groups in a molecule.