Surface-modification of inorganic material

PURPOSE:To improve the wettability, dispersibility or adhesivity of an inorganic material to an organic medium. CONSTITUTION:The surface of an inorganic material is modified by bringing the material into contact with a silicon-containing polymer (P) soluble in an organic solvent, having a number-average molecular weight of 1,000-1,000,000 and having a structure containing at least one R O group (R is methyl, or ethyl, etc.) and at least one Si atom per one molecule wherein the R O group and the Si atom are bonded with each other to form an Si-O-C bond and a part or total of the Si atoms are directly or indirectly bonded to the main chain through the Si-O-C bond.