| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spherical anatase-type titanium dioxide pigment, which has mild concealment and a satisfactory feeling derived from shapes and surface conditions, moderately absorbs sebum secreted from skin, and maintains adhesion to skin when it is used by being blended into a cosmetic, and to provide a method for producing the spherical anatase-type titanium dioxide pigment. <P>SOLUTION: Titanyl sulfate is hydrolyzed under the temperature of ≥170°C and also under the pressure of the saturated vapor pressure or more at the temperature to obtain spherical water-containing titanium dioxide. Next, the spherical water-containing titanium dioxide is fired at the temperature of 600 to 800°C to obtain spherical anatase-type titanium dioxide. In the obtained spherical anatase-type titanium dioxide, the average particle diameter is 0.1 to 5 μm, the peak of the diameter of fine pores in a pore distribution measured by a nitrogen adsorption method is 5 to 50 nm, and further, pore volume lies in the range of 0.05 to 0.3 cm<SP POS="POST">3</SP>/g. <P>COPYRIGHT: (C)2013,JPO&INPIT |
