Method for the production of single crystalline tio2 flakes

Abstract

The present invention is related to a method for the production of single crystalline TiO2 flakes in the rutile crystal structure, to single crystalline TiO2 flakes obtained by this method as well as to the use thereof, especially as pigments in several application media.

1 .- 9 . (canceled) 
     
     
         10 . A single crystalline TiO 2  flake having a rutile crystal structure and having an average particle diameter in the range of 10 to 200 μm according to the largest length or width of the flake, and having the shape of a letter “V” or a triangle when viewed at the largest surface of the flake. 
     
     
         11 . A single crystalline TiO 2  flake according to  claim 10 , wherein the average particle diameter of the TiO 2  flake is at least at least 15 μm and at most 200 μm. 
     
     
         12 . A single crystalline TiO 2  flake according to  claim 10 , having an average particle diameter of 15 to 150 μm according to an equivalent of the corresponding circle diameter. 
     
     
         13 . A single crystalline TiO 2  flake according to  claim 10 , having and aspect ratio of at least 5. 
     
     
         14 . A composition comprising a single crystalline TiO 2  flake according to  claim 10  which is a paint, ink, coating composition, plastic or cosmetic. 
     
     
         15 . A composition according to  claim 14  wherein the single crystalline TiO 2  flake functions as white pigment, photo catalyst, host material for dye sensitized solar cells, UV absorbent or water repellent. 
     
     
         16 . A single crystalline TiO 2  flake according to  claim 13 , wherein the TiO 2  flake has an aspect ratio of at least 7.5. 
     
     
         17 . A single crystalline TiO 2  flake according to  claim 10 , wherein the TiO 2  flake has an average thickness of 0.2 μm-1.0 μm.