Eckart Gmbh

Burkhard Schreiber

Günter Kaupp

Ulrich Schmidt

Frank Henglein

Alexander Albrecht

The invention relates to coated effect pigments, wherein the coating comprises a binder which is suitable for powder paints. They comprise a crystalline and an amorphous fraction which is determined by CNMR MAS relaxation measurements, the relaxation of theC cores being fitted as a biexponential relaxation according to the formula (II) and the degree of crystallinity c being in a range between 40 to 85%, and relaxation having a short average relaxation time Tand a long average relaxation time T, and Tbeing in a range of from 65 to 130 s. The effect pigments coated according to the invention have at least one endothermic peak with a maximum from a range of T=100 to 150° C. and an enthalpy ΔH associated with said peak from a range of 15 J/g to 80 J/g in DSC at a feed speed of 5° C./min, the enthalpy being calculated relative to the amount of the binder. The binders are applied to the effect pigment by way of spontaneous precipitation.

Effect pigments coated with organic binders for powder paints, and a method for producing said coated effect pigments and their use

The invention relates to coated effect pigments, wherein the coating comprises a binder which is suitable for powder paints. They comprise a crystalline and an amorphous fraction which is determined by CNMR MAS relaxation measurements, the relaxation of theC cores being fitted as a biexponential relaxation according to the formula (II) and the degree of crystallinity c being in a range between 40 to 85%, and relaxation having a short average relaxation time Tand a long average relaxation time T, and Tbeing in a range of from 65 to 130 s. The effect pigments coated according to the invention have at least one endothermic peak with a maximum from a range of T=100 to 150&#xb0; C. and an enthalpy &#x394;H associated with said peak from a range of 15 J/g to 80 J/g in DSC at a feed speed of 5&#xb0; C./min, the enthalpy being calculated relative to the amount of the binder. The binders are applied to the effect pigment by way of spontaneous precipitation.

Effect pigments coated with organic binders for powders paints, and a method for producing said coated effect pigments and their use

The invention relates to coated effect pigments, wherein the coating comprises a binder which is suitable for powder paints. They comprise a crystalline and an amorphous fraction which is determined by CNMR MAS relaxation measurements, the relaxation of theC cores being fitted as a biexponential relaxation according to the formula (II) and the degree of crystallinity c being in a range between 40 to 85%, and relaxation having a short average relaxation time Tand a long average relaxation time T, and Tbeing in a range of from 65 to 130 s. The effect pigments coated according to the invention have at least one endothermic peak with a maximum from a range of T=100 to 150&#xb0; C. and an enthalpy &#x394;H associated with said peak from a range of 15 J/g to 80 J/g in DSC at a feed speed of 5&#xb0; C./min, the enthalpy being calculated relative to the amount of the binder. The binders are applied to the effect pigment by way of spontaneous precipitation. 

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Hartenstein, Germany

Burkhard Schreiber