The parent hydration treatment backing material, production manner null of the parent hydration treatment powder body, and the parent hydration treatment powder body

摘要

PPROBLEM TO BE SOLVED: To provide a hydrophilized substrate having sufficient hydrophilicity, to provide a hydrophilized powder not causing skin irritation or the like, and to provide a dispersion of the hydrophilized powder. PSOLUTION: The hydrophilized substrate is obtained by treating the surface of a substrate with a hydrolyzable silyl group-containing acid anhydride silane compound represented by general formula (1) (wherein, RSP1/SPis a hydrogen atom or 1C-6C alkyl group; RSP2/SPs are the same or different organic groups selected from 1C-30C alkyl group, aryl group, aralkyl group and fluorine-substituted alkyl group; A is a linear or branched 2C-6C alkylene group; a is an integer of 1-3; b is an integer of 0-2; and a+b=3), then ring-opening the acid anhydride portion by hydrolysis, and further partially or completely neutralizing the resulting compound with an alkali. PCOPYRIGHT: (C)2010,JPO&INPIT