Title:
SUPERFINE TITANIUM OXIDE AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3894597
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce superfine titanium oxide particles having improved yellowing resistance, light resistance and function for protecting from ultraviolet rays by coating the surface of the superfine titanium oxide particles with a slightly water-soluble metal phosphate.
SOLUTION: Superfine titanium oxide particles having 0.01-0.1μm average first particle diameter and nearly spherical shapes are obtained by mixing an aqueous solution of a soluble titanium compound such as titanium chloride and titanyl sulfate with a neutralizing agent to provide a hydrated product, and calcining the hydrated product obtained by neutralizing and hydrating the titanium compound at ≤1,000°C. The objective superfine titanium oxide particles coated with 1-30wt.% slightly water-soluble metal phosphate is obtained by adding phosphoric acid and/or a water-soluble phosphoric acid salt, and a water-soluble metal compound to an aqueous slurry of 1-200g superfine titanium oxide particles per litter, thereafter regulating the pH of the slurry to 4-10, further heating the slurry to 20-100°C to crystallize the slightly water-soluble metal phosphate.
Inventors:
Hideo Futamata
Hitoshi Ando
Akito Sakai
Masakazu Hattori
Hitoshi Ando
Akito Sakai
Masakazu Hattori
Application Number:
JP25552196A
Publication Date:
March 22, 2007
Filing Date:
September 04, 1996
Export Citation:
Assignee:
Ishihara Sangyo Co., Ltd.
International Classes:
A61K8/00; C01G23/047; A61K8/24; A61K8/25; A61K8/29; A61K8/35; A61Q17/04; C01G23/04; C08K9/02; C08L101/00; C09D5/32; C09K3/00; (IPC1-7): C01G23/04; A61K7/42; C08K9/02; C08L101/00; C09D5/32; C09K3/00
Domestic Patent References:
| JP8225323A | ||||
| JP5032518A |
Previous Patent: DEVICE FOR DETECTING PART DAMAGED BY NAIL IN CONCEALED PIPE LINE
Next Patent: SPRAYING MATERIAL AND SPRAYING METHOD USING THE SAME
Next Patent: SPRAYING MATERIAL AND SPRAYING METHOD USING THE SAME