Pigment preparations

US7351474B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Guenter Etzrodt · Stuttgart, DE
• Achim Grefenstein · Altrip, DE
• Wieland Jenet · Worms, DE
• Robert Bayer · Sinsheim, DE
• Reinhold Rieger · Ludwigshafen, DE

Key dates

• Filing date: Nov 15, 2001
• Grant date: Apr 1, 2008
• Expiry date: Jul 2, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31797
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

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).