Back to results
US 5,085,706 AGranted
Synthetic pigment having the color of natural uncalcined umber and its use
AssigneeBayer Aktiengesellschaft
InventorsPeter Kuske, Gunter Buxbaum
Life of this patent
Estimating the term…
Abstract
Pigments having the color of natural uncalcined umber contain more than 85% by weight of iron oxides, expressed as Fe.sub.2 O.sub.3, and less than 0.1% by weight of crystalline silica are obtained by mixing iron oxides of spinel structure and/or hematite structure with or without iron oxide yellow and said pigments are useful in coloring paints, lacquers and building materials.
Claims12
A synthetic pigment having the color of natural uncalcined umber which has an iron content, expressed as Fe.sub.2 O.sub.3, of more than 85% by weight and a content of silica of less than 0.1% by weight.
Dependencies are inferred from the claim text.