Dispersants for pigment concentrates

US5880193A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Fritz Berke · Herne, DE
• Volker Schrenk · Herten, DE
• Manfred Scheiba · Essen, DE
• Werner Schaefer · Hofheim, DE
• Guenter Hahn · Wiesloch, DE

Key dates

• Filing date: Apr 25, 1996
• Grant date: Mar 9, 1999
• Expiry date: Apr 25, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/03
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The preparation of pigment concentrates for the coloring of resin molding compositions in which the pigment is very finely dispersed is carried out successfully using, for the preparation of the pigment concentrates, a dispersant which contains the following components: PA1 from 0 to 90% by weight of a substantially amorphous poly-.alpha.-olefin, PA1 from 0 to 90% by weight of polyolefin wax, PA1 from 0 to 30% by weight of crystalline polyolefin, and PA1 from 1 to 50% by weight of a specific polyacrylic acid ester.