▎ 摘　　要

NOVELTY - Compatibilizer comprises inorganic compound-hyperbranched polymer composite comprising inorganic compounds, and hyperbranched polymer having degree of branching of 0.01-1 and including at least one of ketones, esters, and carboxyls. USE - The compatibilizer is useful in organic-inorganic composite material for molded article i.e. abrasive sand (all claimed). ADVANTAGE - The compatibilizer: has excellent compatibility by being mixed with base polymer; can be mixed with base polymer to easily disperse inorganic material in base polymer; produces organic-inorganic composite materials with excellent physical properties; and molded product having excellent properties i.e. abrasive material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for organic-inorganic composite material comprising compatibilizer and base polymer.