Lustrous pigments for pigmenting casein plastics

US4128435A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Wilhelm Baumer
• Horst Bernhard
• Reiner Esselborn · Darmstadt, DE
• Jorg Ohngemach · Reinheim, DE
• Otto Stahlecker · Darmstadt, DE
• Fritz Zureda · Darmstadt, DE

Key dates

• Filing date: Jun 24, 1977
• Grant date: Dec 5, 1978
• Expiry date: Jun 24, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/308
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Pigmented substantially crack-free casein plastic compositions containing a minor, luster-imparting quantity of coated mica platelets, wherein at least 75% of the pigment particles possess an average platelet size of below 10 .mu.m., a thickness of about 0.1 to 0.7 .mu.m. and a ratio of diameter to thickness of about 10 to 200.