Process for preparing oriented three-dimensional crosslinked polymer materials having a wide cholesteric reflection band, such materials, cholesteric films and broadband filters, polarizers and reflectors

摘要

Cholesteric polymer material with a density gradient in its polymer network and a cholesteric reflection band with a width of NOTLESS 100 nm is claimed. Also claimed are: (a) cholesteric films of this material and (b) a method of producing oriented, 3-dimensional cross-linked polymer materials (I) with extended cholesteric reflection bands.