Very high solids tio2 slurries

Details Very high solids tio2 slurries Very high solids tio2 slurries

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C01G 23/047 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2329824

The present invention discloses high solids slurries of anatase titanium dioxide pigment comprising greater than about 75 % by weight of anatase TiO2 pigment dispersed in water. A process for producing the slurries of the present invention is disclosed which comprises the steps of a) dry milling the anatase titanium dioxide pigment, preferably by pressure rolling, and b) mixing the dry milled pigment with water in the presence of an acrylic acid dispersant.

La présente invention concerne des bouillies à teneur élevée en solides de pigments de dioxyde de titane du type anatase, comprenant un pourcentage pondéral supérieur à environ 75 % de pigments de TiO2 du type anatase dispersés dans l'eau. L'invention concerne également un procédé de production des bouillies de la présente invention, lequel comprend les étapes consistant : a) à broyer à sec le pigment de dioxyde de titane du type anatase, de préférence par laminage sous pression, et b) à mélanger le pigment broyé à sec avec de l'eau, en présence d'un dispersant à base d'acide acrylique.

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