| abstract |
(57) [Problem] The present invention has excellent hydrophobicity, A hydrophobized metal compound particle powder capable of maintaining excellent hydrophobicity over a long period of time because a hydrophobizing agent is not easily detached from a particle surface. SOLUTION: The hydrophobized metal compound particle powder is The average particle diameter of the metal oxide particles or the metal hydrate particles is coated with an organosilane compound formed from one or more hydrophobizing agents selected from fluoroalkylsilanes and alkoxysilanes. .0 A metal compound particles of 1～0.3Myuemu, and at 0.5 mg / m 2 or less if the hydrophobicity of the metal compound particles are shown in water vapor adsorption amount V 90 value, and, the metal compound The degree of hydrophobicity V 90 after the evaluation of the desorption rate of the particle powder is 0.5 It is made of metal compound particles which have been hydrophobized and have a content of 5 mg / m 2 or less. |