| abstract |
This composition for forming a silica-based coating film contains a siloxane polymer and an alkali metal compound. As the siloxane polymer, a hydrolysis-condensation product of a silane compound having a hydrolysable group is preferable. As the alkali metal of the alkali metal compound, sodium, lithium, potassium, rubidium, cesium and the like are used. As the alkali metal compound, a nitrate, a sulfate, a carbonate, an oxide, a chloride, a bromide, a fluoride, an iodide, or a hydroxide of the above alkali metal is used. The composition for forming a silica-based coating film may contain a material for forming a hole. As the material for forming the openings, at least one selected from polyalkylene glycols and terminal alkylated products thereof is used.n n n Siloxane polymer, alkali metal compound |