Inorganic fine particle dispersant and inorganic fine particle dispersion using the same

An inorganic fine particle dispersant that uses an organic solvent or a liquid polymer as a dispersion medium, the inorganic fine particle dispersant comprising, as an essential component, a compound resin (A) in which a polysiloxane segment (a1) having a structural unit represented by general formula (1) and/or general formula (2) and a silanol group and/or a hydrolyzable silyl group is bonded to a vinyl-based polymer segment (a2) through a bond represented by general formula (3), the bond being formed as a result of a dehydration condensation reaction between the silanol group and/or hydrolyzable silyl group of the polysiloxane segment (a1) and a silanol group and/or hydrolyzable silyl group of the vinyl-based polymer segment (a2):

• (In general formulae (1) and (2), R1, R2, and R3 each independently represent a group having one polymerizable double bond selected from the group consisting of —R4—CH═CH2, —R4—C(CH3)═CH2, —R4—O—CO—C(CH3)═CH2, and —R4—O—CO—CH═CH2 (where R4 represents a single bond or an alkylene group having 1 to 6 carbon atoms), an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, an aryl group, or an aralkyl group having 7 to 12 carbon atoms;
• and at least one selected from R1, R2, and R3 is the group having a polymerizable double bond.)
• (In general formula (3), the carbon atom is part of the vinyl-based polymer segment (a2) and the silicon atom bonded only to the oxygen atom is part of the polysiloxane segment (a1).).