| 摘要 |
PROBLEM TO BE SOLVED: To provide polyorganosilsesquioxane-based fine particles having high water repellency and excellent dispersibility and affinity with various materials without treating the surfaces of isolated polymethylsilsesquioxane fine particles and without using a fluoroalkyl group-containing compound. SOLUTION: The polyorganosilsesquioxane-based fine particles are characterized by being obtained by hydrolyzing and condensing Si(OR<SP>2</SP>)<SB>4</SB>(R<SP>2</SP>is H or an identical or different 1 to 6C alkyl) and (CH<SB>3</SB>)<SB>3</SB>SiOR<SP>3</SP>and/or [(CH<SB>3</SB>)<SB>3</SB>Si]<SB>2</SB>NH (R<SP>3</SP>is H or an identical or different 1 to 6C alkyl) on the surfaces of polyorganosilsesquioxane-based fine particles containing R<SP>1</SP>SiO<SB>3/2</SB>units (R<SP>1</SP>is an identical or different 1 to 20C monovalent organic group) in an amount of≥70 mol%, and having a melting point of≥300°C or not having a melting point. COPYRIGHT: (C)2008,JPO&INPIT
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