Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FAN-SHAPED OR DISCOIDAL TITANIUM DIOXIDE AND ITS PRODUCTION, AND ITS USE
Document Type and Number:
Japanese Patent JPH10245228
Kind Code:
A
Abstract:

To obtain fan-shaped or discoidal titanium dioxide having a high UV light- screening effect (especially UV-A screening effect), high dispersibility and high transparency and useful for sunscreen cosmetics, UV light-preventing coatings, UV light- preventing agents by aggregating and/or binding acircular titanium dioxide particles and specifying the side, thickness and specific surface area of the titanium dioxide.

This fan-shaped titanium dioxide has a side of 0.05-0.2μm, especially 0.08-0.15μm, a thickness of 0.02-0.1μm, especially 0.03-0.06μm, and a specific surface area of 90-180m2/g, especially 95-130m2/g. The fan-shaped titanium dioxide is produced by neutralizing a titanyl sulfate solution or titanium tetrachloride solution with an alkali, adding hydrochloric acid to the obtained orthotitanic acid, and subsequently subjecting the obtained solution having a TiO2 concentration of 80-140g/L and a hydrochloric acid concentration of 90-150g/L to a synthetic reaction at a temperature of 25-60°C. The obtained fan-shaped titanium dioxide particles and the discoidal titanium dioxide particles are coated with the water-containing oxide of aluminum, silicon, etc., further coated with water-containing iron oxide and subsequently calcined to obtain the material useful for sunscreen cosmetic.


Inventors:
UENISHI TOSHIAKI
YAMAZAKI TAKANORI
Application Number:
JP6184097A
Publication Date:
September 14, 1998
Filing Date:
February 28, 1997
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TITAN KOGYO KK
International Classes:
A61K8/00; A61K8/02; A61K8/11; A61K8/19; A61K8/25; A61K8/26; A61K8/28; A61K8/29; A61Q17/04; C01G23/053; C08K3/22; C08K7/08; C08K9/02; C08L101/00; C09C1/36; C09D5/32; C09K3/00; (IPC1-7): C01G23/053; A61K7/42; C08K3/22; C08K7/08; C08K9/02; C08L101/00; C09C1/36; C09D5/32; C09K3/00
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)