Polymerizable inorganic-particle dispersant, inorganic-organic composite particles containing said polymerizable inorganic-particle dispersant, and inorganic-organic resin composite material

A compound, comprising functional groups A, B, and Q:

• A:
• a polymerizable functional group;
• B:
• a carboxyl group, an oxo acid group containing phosphorus, or an oxo acid group containing sulfur;
• and
• Q:
• a sulfur-containing divalent or more cycloaliphatic hydrocarbon group optionally containing a hetero atom other than sulfur,
• wherein a proportion of sulfur atoms contained in the polymerizable inorganic-particle dispersant is 20% by mass or higher and 70% by mass or less, in terms of sulfur atom content.

Inorganic-organic composite particles, comprising a polymerizable inorganic-particle dispersant comprising a compound which includes the following functional groups A, B, and Q:

• A:
• a polymerizable functional group;
• B:
• a carboxyl group, an oxo acid group containing phosphorus, or an oxo acid group containing sulfur;
• and
• Q:
• a sulfur-containing divalent or more cycloaliphatic hydrocarbon group optionally containing a hetero atom other than sulfur.