Patent · US Active

Alpha-alumina flakes

US11891541B2 · kind B2 · utility

0Cited by

14References

21Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Ryuta Suzuki · Anjo, JP
Gerhard Pfaff · Mainburg, DE
Sabine Schoen · Darmstadt, DE
Noriyuki MATSUDA · Chiba, JP
Katsuhisa Nitta · Iwaki, JP

Key dates

Filing date	Apr 14, 2022
Grant date	Feb 6, 2024
Priority date	—
Expiry date	Apr 14, 2042

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Alpha-Alumina flakes having a particle thickness of 130-400 nm, a D50-value of 15-30 μm, a D90-value of 30-45 μm and a D10-value of <9.5 μm. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.