C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
6/208
C09C 1/36 (2006.01)
Patent
CA 1113658
ABSTRACT OF THE DISCLOSURE Titanium dioxide pigments possessing outstanding durability are prepared by depositing in a slurry of TiO2, a dense silica coating upon the TiO2, followed by precipi- tating alumina in the slurry by a method comprising main- taining the TiO2 slurry at a temperature of 80 to 100°C during the silica deposition; rapidly adding sufficient sodium silicate to provide 1.5 to 15% silica, as a dense, amorphous, substantially continuous coating upon the TiO2; adjusting the pH of the slurry to a value of 9 to 10.5, and maintaining the pH at a temperature of 80 to 100°C for 15 to 60 mins.; and rapidly adding sufficient sodium aluminate and acid simultaneously to the slurry while maintaining the pH at 7 to 9, to deposit from about 1.5 to 5% alumina on the silica treated pigment.
286242
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
LandOfFree
Process for the production of durable titanium dioxide pigment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of durable titanium dioxide pigment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of durable titanium dioxide pigment will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-934808