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US 10,870,743 B2Granted
Coated pigments for coloring PVC
AssigneeLANXESS Deutschland GmbH
InventorsKrzysztof Chlopek, Ulrich Meisen, Ralf Gerhard Koenig
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Abstract
Coated pigments for plastics, as well as processes for production of the pigments, the use thereof for colouring polyvinyl chloride (PVC), processes for colouring PVC, PVC coloured with such coated pigments, and also plastics products including such coated pigments, may include inorganic pigments coated with of at least one of hydroxides of magnesium, hydroxides of calcium, oxides of magnesium, and oxides of calcium.
Claims28
A coated pigment comprising:
- inorganic pigment selected from the group consisting of iron oxides, iron oxide hydroxides, zinc ferrites, magnesium ferrites, manganese ferrites, and mixtures thereof;
- and
- at least one of hydroxides and oxides of at least one of magnesium and calcium bonded directly to the surface of the core of the inorganic pigment to form coated pigment;
- wherein, based on the total weight of the coated pigment, the coated pigment comprises:
- 3.5% to 30% by weight of magnesium and 0.001% to 0.1% by weight of calcium, or
- 5.5% to 30% by weight of calcium.
3 more elements
Dependencies are inferred from the claim text.