Thin aluminum pigments having a narrow thickness distribution, method for producing same, and use of aluminum pigments

US11427712B2 · kind B2 · utility

Assignee

• ECKART GmbH · DE

Inventors

• Stefan Trummer · Koblenzer Straße, DE
• Michael Becker · Lautenbächle, DE
• Thomas Schlegl · Regensburg, DE

Key dates

• Filing date: Aug 19, 2019
• Grant date: Aug 30, 2022
• Expiry date: Apr 3, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/54
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to aluminum pigments which are at least partially coated with lubricant, wherein the aluminum pigments have a relative breadth of thickness distribution Δh of from 30% to less than 70%, as determined by a scanning electron microscope thickness count and as calculated on the basis of the corresponding cumulative breakthrough curve of the relative frequencies of occurrence, according to the formula Δh=100×(h90−h10)/h50, and an X-ray diffractogram, measured on pigments in substantially plane-parallel orientation, having one or two main peaks which do not correspond to the [111] reflexes.The invention further relates to a method for the production of said aluminum pigments and to uses thereof and also to nail varnishes and printing inks containing said aluminum pigments of the invention.