Process for improving carbon black dispersion

US9056957B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Andreas Seidel · Dormagen, DE
• Hans-Jürgen Thiem · Dormagen, DE
• Reiner Rudolf · Leverkusen, DE
• Joerg Reichenauer · Krefeld, DE
• Thomas Eckel · Dormagen, DE

Key dates

• Filing date: Dec 20, 2011
• Grant date: Jun 16, 2015
• Expiry date: Dec 20, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L91/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A masterbatch comprising pigment and demolding agent is provided. The demolding agent is selected from the group comprising low molecular weight polyolefin oils, low molecular weight polyolefin waxes, montan waxes and aliphatic or aromatic carboxylic acid esters of fatty acids and/or fatty alcohols, wherein the pigment content of the masterbatch is from 3 to 70 wt. %, based on the total weight of the masterbatch. The masterbatch is suitable for preparation of a polymer composition having improved pigment dispersion.