Pigment granules

US8846783B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Thomas Rathschlag · Weilburg, DE
• Carsten Griessmann · Groß-Zimmern, DE

Key dates

• Filing date: Dec 18, 2009
• Grant date: Sep 30, 2014
• Expiry date: Mar 3, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/302
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Pigment granules comprise one or more flake-form effect pigments, polymer particles or polymer particle mixtures, adhesion promoters, antioxidants and optionally additives. A process for the preparation of pigment granules comprises mixing one or more flake-form effect pigments, one or more polymer particles, at least one adhesion promoter, at least one antioxidant and optionally one or more additives with one another simultaneously or successively. The pigment granules may be used for the pigmentation of powder coatings, plastics and for the preparation of masterbatches. The pigment granules may be employed as a mixture with plastic powders or as a mixture with plastic granules for use in masterbatch applications.