Patent · US Expired

Process for the production of three-dimensionally crosslinked polymeric materials having broad cholesteric reflection bands, and filters, reflectors and polarizers produced by this process

US6071438A · kind A · utility

19Cited by

5References

9Claims

0Family size

Assignee

Consortium für elektrochemische Industrie GmbH · DE

Inventors

Horst Leigeber · Oberhaching, DE
Eckhard Hanelt · Geltendorf, DE
Franz-Heinrich Kreuzer · Martinsried, DE

Key dates

Filing date	Apr 28, 1998
Grant date	Jun 6, 2000
Priority date	—
Expiry date	Apr 28, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2323/031
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for the preparation of three-dimensionally crosslinked polymeric materials having a broad cholesteric reflection band, which comprises bringing polymeric materials having cholesteric properties and an extractable material content into contact with a solvent or solvent mixture.

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