Patent · US Expired

Flaky aluminum oxide and pearlescent pigment, and production thereof

US5702519A · kind A · utility

44Cited by

7References

13Claims

0Family size

Assignee

MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

Katuhisa Nitta · Fukushima, JP
Tan Ming Shau · Fukushima, JP
Jun Sugahara · Naha, JP

Key dates

Filing date	Sep 13, 1996
Grant date	Dec 30, 1997
Priority date	—
Expiry date	Sep 13, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09C2220/106
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A flaky substrate which is characterized by a uniform small thickness, a smooth nearly colorless surface, a large aspect ratio, and a very little tendency toward crystal twinning and aggregation, is composed of aluminum oxide and titanium oxide. The flaky substrate is used to prepare an excellent pearlescent pigment.

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