04293435 is referenced by 104 patents and cites 7 patents.

A liquid-crystalline polymer phase having an induced cholesteric structure comprises a component having a chiral structure and a component having a nematic structure and contains a polymer with nematogenic units of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, n is an integer from 1 to 6 and R.sub.3 represents specific structural elements containing at least two phenylene groups. Preferred is a copolymer comprising a component of the above formula and an additional chiral component of similar structure, prepared by copolymerization of the nematogenic monomer with the chiral monomer.

The liquid-crystalline polymer phase permits variation of the wavelength of the reflected light .lambda..sub.R, and its cholesteric structure can be converted to the glassy polymer state and remains preserved in the solid state. Such liquid-crystalline polymer phases can be used in integrated optics, opto-electronics and information storage, e.g. for the manufacture of polarization filters or selective reflectors.

Title
Liquid-crystalline polymer phase having a cholesteric structure, processes for its preparation and its use
Application Number
6/58943
Publication Number
4293435
Application Date
July 19, 1979
Publication Date
October 6, 1981
Inventor
Helmut Ringsdorf
Mainz-Gonsenheim
DE
Heino Finkelmann
Clausthal-Zellerfeld
DE
Michael Portugall
Eltville
DE
Agent
Keil & Witherspoon
Assignee
BASF Aktiengesellschaft
DE
IPC
G02F 1/13
C09K 3/34
View Original Source