Pigment preparations
AssigneeBASF SE
InventorsGuenter Etzrodt, Achim Grefenstein, Wieland Jenet, Robert Bayer, Reinhold Rieger
Life of this patent
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Abstract
A pigment formulation in granule form obtainable by a) dispersing at least two different pigments (A) in a solution of a thermoplastic polymer (B) in an organic solvent in the presence or absence of a dispersant (C), and b) applying as a layer the dispersion produced in step a) to granules of a thermoplastic polymer (B′), which is the same as the polymer (B), with removal of the solvent, wherein the pigment formulation includes the granules of the thermoplastic polymer (B′); and a coating on the granules of the thermoplastic polymer (B′), where the coating comprises the at least two different pigments (A) and the thermoplastic polymer (B).
Claims21
A pigment formulation in granule form obtainable by
- a) dispersing at least two different pigments (A) in a solution of a thermoplastic polymer (B) in an organic solvent in the presence or absence of a dispersant (C), and
- b) applying as a layer the dispersion produced in step a) to granules of a thermoplastic polymer (B′), which is the same as the polymer (B), with removal of the solvent, wherein
- the pigment formulation comprises
- the granules of the thermoplastic polymer (B′);
- and
- a coating on the granules of the thermoplastic polymer (B′), where the coating comprises the at least two different pigments (A) and the thermoplastic polymer (B).
Dependencies are inferred from the claim text.