Surface treatment agent, hydrophilized inorganic substrate, and method for producing same

A hydrophilized inorganic substrate to which a pretreatment agent and a hydrophilizing treatment agent have been sequentially applied,

• the pretreatment agent comprises a silane compound having a reactive silyl group and an organic functional group, and a polyfunctional monomer,
• the polyfunctional monomer has one or more first reactive groups that react with the organic functional group and one or more second reactive groups that react with the hydrophilizing treatment agent, and
• the hydrophilized inorganic substrate comprises:
• an inorganic substrate,
• the silane compound fixed to the inorganic substrate via the reactive silyl group,
• the polyfunctional monomer fixed to the silane compound through a reaction between the organic functional group and the first reactive group, and
• the hydrophilizing treatment agent fixed to the polyfunctional monomer through a reaction between the second reactive group and the hydrophilizing treatment agent.

A method for producing a hydrophilized inorganic substrate, the method comprising:

• applying a pretreatment agent to a surface of an inorganic substrate;
• applying a hydrophilizing treatment agent to a surface of the inorganic substrate to which the pretreatment agent has been applied;
• and
• fixing the hydrophilizing treatment agent to the pretreatment agent,
• the pretreatment agent comprises a silane compound having a reactive silyl group and an organic functional group, and a polyfunctional monomer,
• the polyfunctional monomer has one or more first reactive groups that react with the organic functional group and one or more second reactive groups that react with the hydrophilizing treatment agent, and
• in the fixing, the one or more first reactive groups and the organic functional group react with each other, and the hydrophilizing treatment agent and the one or more second reactive groups react with each other.