Ti02 slurry stabilization

Details Ti02 slurry stabilization Ti02 slurry stabilization

C - Chemistry, Metallurgy

09

D

C09D 17/00 (2006.01) C09C 1/36 (2006.01) C09C 3/04 (2006.01) C09D 7/02 (2006.01)

Patent

CA 2206162

A stable aqueous pigment slurry and a process for preparing same. The slurry contains about 50 to 90 wt.%, based on the weight of the slurry, of a pigment such as titanium dioxide and about 0.2 to 3.0 wt.%, based on the weight of the slurry, of a smectite clay such as bentonite, hectorite or montmorillonite. Preferably, the pigment slurry also contains about 0.1 to 2.0 wt.%, based on the weight of the slurry, of a dispersant. The process involves admixing a pigment slurry and a smectite clay slurry and preferably also the dispersant by milling the three components together under high shear conditions.

Suspension aqueuse pigmentaire stable et procédé de préparation de cette dernière. La suspension contient environ 50 à 90 % en poids, par rapport au poids de la suspension, d'un pigment comme le dioxyde de titane et environ 0,2 à 3,0 % en poids, par rapport au poids de la suspension, d'une argile smectique comme la bentonite, l'hectorite ou la montmorillonite. De préférence, la suspension de pigment contient également environ 0,1 à 2,0 % en poids, par rapport au poids de la suspension, d'un dispersant. Le procédé comporte le mélange d'une suspension de pigment et d'une suspension d'argile smectique et, également, de préférence, du dispersant par broyage des trois constituants ensemble dans des conditions de cisaillement élevé.

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