Monoclinic greenish lead chromate pigments

C - Chemistry – Metallurgy – 09 – C

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C09C 1/20 (2006.01) C08K 3/24 (2006.01)

Patent

CA 1220006

3-14542/TEN/1+2/+ Monoclinic greenish lead chromate pigments Abstract Monoclinic greenish lead chromate pigments con- taining lead chromate and lead sulfate in a weight ratio of 59.9:40.1 to 35:65, wherein the pigment particles have a median value of 0.3-0.4 µm and 63-78% by weight of all the particles have a Stokes diameter of 0.15-0.5µm. The pigments obtained are distinguished on applio cation by low particle size, uniform particle size dis- tribution, high tinctorial strength, great hiding power, good rheological properties and high saturation. Note- worthy is the more greenish hue of these pigments and the lower soluble lead salts content compared with known pig- ments of the same hue.

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