Titanium dioxide pigment
Abstract
Abstract ELONGATE MONOCRYSTALLINE RUTILE NUCLEUS CRYSTALS ARE MIXED WITH AN ACIDIC TITANIUM CHLORIDE SOLUTION WHICH CONTAINS FROM 0.1 TO 60 GRAMS OF DISSOLVED TITANIUM PER LITER, FROM 0.004 TO 9 GRAM IONS OF CHLORIDE PER LITER AND LITTLE OR NO PHOSPHATE, SULPHATE OR BISULPHATE. THE MIXTURE IS HEATED AT A TEMPERATURE OF FROM 80* TO 150*C., THEREBY PRODUCING COMPOSITE TITANIUM DIOXIDE PIGMENT PARTICLES CONSISTING EACH OF ONE OR MORE NUCLEUS CRYSTALS SURROUNDED BY ELONGATE RUTILE CRYSTALLITES IN GENERALLY PARALLEL ARRAY TOGETHER WITH INTERSTITIAL NON-RUTILE TITANIUM DIOXIDE, THE PIGMENT PARTICLE HAVE ASPECT RATIOS OF FROM 3 TO 150, EFFECTIVE DIAMETERS OF FROM 0.05 TO 0.3 MICRON AND CONTAIN NOT MORE THAN ABOUT TEN WEIGHT PERCENT OF THE NON-RUTILE TITANIUM DIOXIDE.
Inventors
- 👤 M Basque
- 👤 J Magner
- 👤 J Surls
- 👤 B West
Bibliographic Details
Claims Analysis
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