Patent ID: 6620861
Filing Date: 2003-09-16
Classification: A61K

Abstract:
An inorganic filler which comprises an inorganic fine particle having an average particle size of 0.01Ëœ5 &mgr;m, in which the surface of the inorganic fine particle is covered with polysiloxane, wherein the polysiloxane is a condensate obtained by hydrolysis or partial hydrolysis of a silane compound represented by the general formula (I): wherein Z is ROâ€” or OCNâ€”, X is halogen, Y is â€”OH, R is an organic group having a carbon number of 8 or less, and n, m and L are an integer of 0 to 4, provided that n+m+L=4,wherein the inorganic fine particle is at least one selected from the group consisting of quartz, amorphous silica, aluminium silicate, aluminium oxide, titanium oxide, zirconium oxide, glasses, calcium carbonate, talc, kaolin, clay, mica, aluminium sulfate, calcium sulfate, barium sulfate, calcium phosphate, hydroxyapatite, silicon nitride, aluminium nitride, titanium nitride, silicon carbide, boron carbide, calcium hydroxide, strontium hydroxide and zeolite and wherein the glasses are selected from the group consisting of a glass prepared by a melting process, a synthetic glass prepared by a sol-gel process, and a glass produced by a vapor phase process.