Pigment preparations

US4217266A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Alfred Pischtschan · Gundelsheim, DE
• Karlheinz Wolf · Leverkusen, DE
• Reinhold Hornle
• Fritz Bremer · Leverkusen, DE
• Bernhard Arnold · Pulheim, DE
• Werner Kullick · Leverkusen, DE

Key dates

• Filing date: Jan 11, 1979
• Grant date: Aug 12, 1980
• Expiry date: Jan 11, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2425/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A pigment preparation containing a pigment, a nonionic surface-active agent and, as a thermoplastic finishing agent, a copolymer which has an average molecular weight of 80,000 to 160,000 and consists of 90-50% by weight of .alpha.-methylstyrene and 10-50% by weight of acrylonitrile, and its use for the mass coloring of thermoplastic moulding compositions.