Photosensitive resin composition, liquid-repellent anti-fouling film, and inkjet recording head

A liquid-repellent anti-fouling film that is a cured product of a photosensitive resin composition, wherein

• the photosensitive resin composition comprises:
• an epoxy resin (A) represented by formula (1);
• an epoxy resin (B) that has an epoxy equivalent of 500 g/eq. or less and that is different from the epoxy resin (A) represented by formula (1);
• and
• a cationic polymerization catalyst,
• where, in formula (1), R1, R2, R3, R4, and X1 are each independently an alkyl group with carbon numbers of 1 to 12, an aryl group with carbon numbers of 6 to 12, or an epoxy-comprising group;
• X2 is an epoxy-comprising group;
• m+n is an integer from 1 to 60;
• and a sequence of a structure of parentheses marked with m and a sequence of a structure of parentheses marked with n may be random or block.

An inkjet recording head that has a liquid-repellent anti-fouling film on a surface in which a discharge port is disposed, wherein

• the liquid-repellent anti-fouling film is a cured product of a photosensitive resin composition, and
• the photosensitive resin composition comprises:
• an epoxy resin (A) represented by formula (1);
• an epoxy resin (B) that has an epoxy equivalent of 500 g/eq. or less and that is different from the epoxy resin (A) represented by formula (1);
• and
• a cationic polymerization catalyst,
• where, in formula (1), R1, R2, R3, R4, and X1 are each independently an alkyl group with carbon numbers of 1 to 12, an aryl group with carbon numbers of 6 to 12, or an epoxy-comprising group;
• X2 is an epoxy-comprising group;
• m+n is an integer from 1 to 60;
• and a sequence of a structure of parentheses marked with m and a sequence of a structure of parentheses marked with n may be random or block.