Spray drying method for preparing kaolin as pigment extender

Details Spray drying method for preparing kaolin as pigment extender Spray drying method for preparing kaolin as pigment extender

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) B01D 1/18 (2006.01) C08K 3/22 (2006.01) C08K 3/34 (2006.01) C09C 1/00 (2006.01) C09C 1/42 (2006.01)

Patent

CA 2121329

2121329 9308133 PCTABS00021 Composite white pigments composed of titanium dioxide (TiO2) and kaolin are prepared by subjecting kaolin slurry to spray drying with injected gas to promote droplet fluffing and fragmentation. The slurry contains a hydrocolloid suspending agent and a cationic reagent for making the kaolin particles cationic. The frangible dry material thus produced can be blended with TiO2 particles to produce an extended TiO2 pigment.

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