Patent · US Expired

Chirally nematic polyesters

US6291629A · kind A · utility

3Cited by

6References

23Claims

0Family size

Assignee

BASF SE

Inventors

Hans R. Kricheldorf · Hamburg, DE
Thorsten Krawinkel · Hamburg, DE
Andreas Gerken · Hannover, DE
Peter Schuhmacher · Mannheim, DE

Key dates

Filing date	Aug 6, 1999
Grant date	Sep 18, 2001
Priority date	—
Expiry date	Aug 6, 2019

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/54
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Liquid crystalline chiral nematic polyesters have flexible chains comprising isosorbide, isomannide and/or isoidide units. The polyesters are not crystalline and form stable Grandjean textures which can be frozen on cooling below the glass transition temperature. They can therefore be used in particular as surface-coating materials.

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