Patent · US Expired

Pigment with color dependant on viewing angle, method of making and use of same

US6338897B1 · kind B1 · utility

0Cited by

10References

1Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Fritz Dannenhauer · Hasel, DE
Karl Holdik · Ulm, DE
Fritz Mezger · Schenefeld, DE

Key dates

Filing date	Sep 24, 1999
Grant date	Jan 15, 2002
Priority date	—
Expiry date	Sep 24, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31663
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to a pigment with color dependent on the viewing angle, which has been obtained by three-dimensional crosslinking of oriented substances of liquid-crystalline structure having a chiral phase. In order to stabilize the color of such a pigment at elevated temperatures, crosslinking is carried out in the presence of at least one additional, color-neutral compound comprising at least two crosslinkable double bonds.

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