Coated pigments for dyeing PVC
AssigneeLANXESS Deutschland GmbH
InventorKrzysztof Chlopek
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Abstract
The present invention relates to pigments comprising at least one inorganic compound selected from the group of iron oxides, iron oxide hydroxides, zinc ferrites, zinc oxides, magnesium ferrites and manganese ferrites, wherein the at least one inorganic compound is equipped with a coating comprising at least one hydroxide or oxide of magnesium or calcium and at least one fatty acid salt, to processes for production thereof, to the use thereof for coloring polyvinyl chloride (PVC) and to processes for coloring PVC and to PVC colored with such pigments, and also to plastics products comprising such pigments.
Claims5
A pigment comprising at least one inorganic compound selected from the group consisting of iron oxides, iron oxide hydroxides, zinc ferrites, zinc oxides, magnesium ferrites, and manganese ferrites, wherein the at least one inorganic compound comprises a coating, and the coating consists of:
- at least one hydroxide and/or oxide of magnesium and/or calcium;
- and
- at least one calcium salt and/or magnesium salt of a fatty acid of the general formulae CnH2n+1COOH(I), CnH2n−1COOH(II), CnH2n−3COOH(III) and/or CnH2n−5COOH(IV), where n is from 10 to 20,
- wherein the coating of the at least one inorganic compound consists of an outer layer and an inner layer, wherein
- A) one of the two layers is said at least one hydroxide or oxide of magnesium or calcium and
- B) the other of the two layers is said at least one calcium salt or magnesium salt of a fatty acid of the general formulae CnH2n−1COOH (I), CnH2n−1COOH (II), CnH2n−3COOH (III) and/or CnH2−5COOH (IV), where n is from 10 to 20, wherein the layer according to A) is the inner layer.
Dependencies are inferred from the claim text.