11.26.21
US Patent No. 11,179,300 B2 (Mayo Shinke, Shoko Ogawa, Tomoko Ikeda); Shiseido Company Ltd., Tokyo, has been awarded a US patent for a cosmetic emulsion. It is comprised of titanium dioxide powder, disteardimonium hectorite and silicone surfactant. The titanium dioxide powder has an apparent average particle size that is in a range of 100 to 500 nm, an average crystallite size that is in a range of 15 to 30 nm and specific surface area that is in a range of 10 to 30 m2/g. The titanium dioxide powder is a plurality of particles, each particle having needle-projections that are radially projected on a surface of said particle and coagulated, and a ratio between a minor axis and a major axis (major axis/minor axis) of said particle is in a range of 1.0 to 2.5.