Hydrophobic silica fine powder and making method Shin
Feb 19, 2008#0183;#32;The hydrophobic silica fine powder of the invention is prepared by premixing a hydrophilic silica fine powder obtained by oxidative firing in flame of an (organo)halosilane or (organo)alkoxysilane with a hydrophobizing agent in the form of a dimer diol siloxane or cyclic siloxane or a mixture thereof, mixing the hydrophobizing agent with the powder in a ballmediated mill for achieving dispersion and