Process for improving carbon black dispersion

USRE47079E1 · kind E1 · reissue

Assignee

• Covestro Deutschland 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: Jun 16, 2017
• Grant date: Oct 9, 2018
• Expiry date: Jun 16, 2037

Classification

• Technology area (CPC —): General

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.