PROBLEM TO BE SOLVED: To obtain a titania fine particle having the application, ultraviolet blocking and transparent properties that cannot be achieved by means of a big titania particle or a small titania particle.SOLUTION: A titania nanoparticle has a surface having an acyl group bound thereto, and when raising the temperature to 600°C with a differential thermal and thermogravimetric analysis device, a weight loss at 200°C or more is 5 wt.% or more.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】大きいチタニア粒子でも小さいチタニア粒子でも達成できなかった塗布性、紫外線遮蔽性及び透明性を備えたチタニア微粒子を得る。【解決手段】表面にアシル基が結合しており、且つ、示差熱熱重量同時測定装置によって600℃まで昇温させた場合の200℃以上における重量減少が5重量%以上である、チタニアナノ粒子。【選択図】なし
