C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
C09C 1/36 (2006.01) C09C 1/00 (2006.01) C09D 7/12 (2006.01) C09D 17/00 (2006.01)
Patent
CA 2288032
The present invention relates to TiO2 pigments having TiO2 particles with substantially discrete inorganic particles dispersed on the surfaces of the TiO2 particles. Suitable inorganic particles include silica, calcium carbonate, and mixtures thereof. The substantially discrete inorganic particles have an average diameter size within the range of about 5 to about 50 nm and are dispersed on the surfaces of the TiO2 particles in an amount of less than 20 wt.% based on total pigment weight. This invention also includes coating compositions containing these pigments and processes for making these pigments.
L'invention concerne des pigments TiO¿2? présentant des particules de TiO¿2? avec des particules inorganiques sensiblement séparées, dispersées sur les surfaces des particules de TiO¿2?. Des particules inorganiques appropriées comprennent du silice, du carbonate de calcium et leurs mélanges. Les particules inorganiques sensiblement séparées présentent un diamètre moyen allant d'environ 5 à environ 50 nm et sont dispersées sur les surfaces des particules de TiO¿2? dans une quantité inférieure à 20 % en poids sur la base du poids total des pigments. Cette invention concerne aussi des compositions de revêtement contenant ces pigments et des procédés de fabrication de ces pigments.
Bennett Jones Llp
E.i. Du Pont de Nemours And Company
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