INORGANIC FILLER FOR RUBBER, RUBBER COMPOSITION AND TIRE

The purpose of the present invention is to provide an inorganic filler for rubber, which exhibits excellent wet grip performance when used in a tire, a rubber composition that contains the inorganic filler, and a tire that uses the rubber composition. The inorganic filler for rubber comprises titanium oxide particles which have a weight loss ratio of 0.4-10.0 mass% within the temperature range of200-800 DEG C when heated from 40 DEG C to 1000 DEG C at a temperature increase rate of 10 DEG C/min. Preferably, the specific surface area of the titanium oxide particles is 5-1000 m /g, the average particle diameter of the titanium oxide particles is 10.0 [mu]m or less, the half value width of a peak within the range 2[theta]=20-30 degress is 0.10 degress or more in X-Ray diffraction analysisof the titanium oxide particles, the water-dispersed pH value of the titanium oxide particles is 2.0-11.0, and a treatment layer comprising a surface treatment agent is formed on the surface of the titanium oxide particles. 本发明的