Rutile-type titanium dioxide and cosmetics using the same

摘要

A Rutile-type titanium dioxide having a rectangular particulate form configured such that major axial planes of rod-shaped particles having a minor axis diameter of 3 to 10 nm are oriented and aggregated in the minor axial direction, and a rod-shaped rutile-type titanium dioxide obtained by treating the rectangular rutile-type titanium dioxide with heat, wherein an apparent average major axial length of the oriented and aggregated particles is 100 to 400 nm, an apparent average minor axial length thereof is 30 to 150 nm, an apparent average axial ratio represented by apparent average major axial length/apparent average minor axial length is 2 to 5 and a specific surface area thereof is 10 to 100 m2/g.

主权项

1. A rutile-type titanium dioxide in a rectangular particulate form, comprising:
oriented and aggregated rutile-type titanium dioxide particles wherein each particle of the oriented and aggregated rutile-type titanium dioxide particles has a major axis diameter of from 30 to 200 nm and a minor axis diameter of from 3 to 10 nm, wherein the apparent average major axial length of the oriented and aggregated ruffle-type titanium dioxide particles is from 100 to 400 nm, wherein the apparent average minor axial length of the oriented and aggregated ruffle-type titanium dioxide particles is from 30 to 150 nm, wherein the apparent average axial ratio represented by the apparent average major axial length/the apparent average minor axial length is from 2 to 5, and wherein the specific surface area of the oriented and aggregated rutile-type titanium dioxide particles is from 10 to 100 m2/g.