Patent ID: 7074273

Claim:
A liquid ejection recording head having an ejection orifice for ejecting a liquid, a periphery of the ejection orifice being covered with a cured film of an epoxy resin composition comprising: (i) a first epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, and having a number average molecular weight ranging from 8,000 to 22,000 and a polydispersity ranging from 3.5 to 5.0; (ii) a second epoxy resin having in the molecule thereof at least one water-repellency-imparting group and two or more cyclic aliphatic epoxy groups, and having a number average molecular weight ranging from 2,500 to 8,000 and a polydispersity ranging from 1.5 to 3.0; and (iii) a cationic polymerization catalyst.