Back to results
US 7,837,785 B2Granted
Process for the preparation of pigment granules and the use thereof
AssigneeLANXESS Deutschland GmbH
InventorsHolger Friedrich, Kai Bütje, Udo Holtmann
Life of this patent
Estimating the term…
Abstract
The present invention relates to pigment granules and to a process for the preparation thereof and their use.
Claims71
Pigment granules comprising:
- a pressed or briquetted core having a size in the range of 80 μm to 2000 μm and at least one outer layer applied by granulation, wherein
- a) the pressed or briquetted core comprises at least one organic and/or inorganic pigment and at least one auxiliary;
- b) the at least one outer layer comprises at least one further non-fluorescing organic and/or inorganic pigment and at least one further auxiliary;
- and
- c) in the at least one outer layer:
- 1) the at least one further non-fluorescing organic and/or inorganic pigment is different than the organic and/or inorganic pigment comprised by the pressed or briquetted core;
- 2) the at least one further auxiliary is different than the auxiliary comprised by the pressed or briquetted core;
- 3) the at least one further non-fluorescing organic and/or inorganic pigment is different than the organic and/or inorganic pigment comprised by the pressed or briquetted core and the at least one further auxiliary is different than the auxiliary comprised by the pressed or briquetted core;
- or
- 4) the at least one further non-fluorescing organic and/or inorganic pigment has at least one further auxiliary being identical to those in the pressed or briquetted core, whereby at least one of the further non-fluorescing organic and/or inorganic pigment(s) in at least one outer layer is not pressed or briquetted.
7 more elements
Dependencies are inferred from the claim text.