Inorganic oxide particle, inorganic oxide particle dispersion and preparation method thereof, and method for producing surface modifier

Inorganic oxide particles surface-modified with a surface modifier represented by following general formula (1):

• wherein
• R1 represents a methyl group or an ethyl group,
• R2 represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 40 carbon atoms, or a combination thereof,
• R3 is a linking group comprising a chemical group produced by a reaction between a B group and a C group,
• the B group is an epoxy group, a vinyl group, a hydroxyl group, or an isocyanate group,
• the C group is a carboxyl group, an acid anhydride group, an amino group, a thiol group, a hydroxyl group, or an isocyanate group,
• R4 represents an alkyl group having 1 to 10 carbon atoms and optionally comprising an epoxy group, a vinyl group, a hydroxyl group, an isocyanate group, a carboxyl group, an acid anhydride group, an amino group, or a thiol group, an aryl group having 6 to 40 carbon atoms, or an OH group, and modifies a silanol group on a surface of silica particles with an OH group obtained by hydrolysis of an OR1 group,
• a unit structure A includes a unit structure of following general formula (1-1) and a unit structure of following general formula (1-2), and the number of unit structures of the general formula (1-1) and the number of unit structures of the general formula (1-2) included in the unit structure A are n4 and n5, respectively:
• wherein R5 represents an alkyl group having 1 to 10 carbon atoms and optionally comprising an epoxy group, a vinyl group, a hydroxyl group, an isocyanate group, a carboxyl group, an acid anhydride group, an amino group, or a thiol group, an aryl group having 6 to 40 carbon atoms, an OH group, or a hydrogen atom, and
• n1 is an integer of 1 to 3, n2 is an integer of 0 to 1, n1+n2=3, n3=n4+n5, n3 is an integer of 1 to 100, 0≤n4≤100, and 1≤n5≤100.