Alkylsiloxane-containing epoxy resin composition, surface modifying method using the same, ink-jet recording head and liquid-jet recording apparatus

A surface modifying method for selectively treating the surface of a base member comprising:

• a first step of applying a coating formulation containing a resin composition to the surface of the base member and drying the coating formulation;
• a second step of polymerizing and curing the resin composition by irradiating it with heat or ultraviolet rays;
• a third step of selectively removing the resin composition by means of an excimer laser;
• and
• a fourth step of conducting a post curing operation whenever necessary;
• said resin composition being an alkylsiloxane-coating epoxy resin composition comprising:
• (i) an alkylsiloxane-containing epoxy resin having two or more than two alkylsiloxane groups and two or more than two cyclic aliphatic epoxy groups in a molecule;
• (ii) a cationic polymerization catalyst;
• (iii) an acrylic resin having one or more than one epoxy groups as side chains, said acrylic resin being represented by the following formula (X):
• where x, y and z are positive integers.

An ink-jet recording head having an ejection port for ejecting recording liquid and coated with a cured film of an alkylsiloxane-containing epoxy resin composition at least at the opening of the ejection port, wherein the alikysiloxane-containing epoxy resin composition comprises:

• (i) an alkylsiloxane-containing epoxy resin having two or more than two alkylsiloxane groups and two or more than two cyclic aliphatic epoxy groups in a molecule;
• (ii) a cationic polymerization catalyst;
• and
• (iii) an acrylic resin having one or more than one epoxy groups as side chains, said acrylic resin being represented by the following formula (X):
• where x, y and z are positive integers.