Patent ID: 6143379
Filing Date: 2000-11-07
Classification: B32B,C09B,C09D,C09K

Abstract:
A polymer laminate consisting essentially of at least two cholesteric, liquid-crystalline polymer layers and a light-absorbent layer in between wherein the liquid-crystalline polymer of the liquid-crystalline polymer layers are main-chain polymers and the main-chain polymers consist of:a) from 0 to 99.9 mol % of at least one compound selected from the group consisting of aromatic hydroxycarboxylic acids, cycloaliphatic hydroxycarboxylic acids and aromatic aminocarboxylic acids;b) from 0 to 49.95 mol % of at least one compound selected from the group; consisting of aromatic dicarboxylic acids and cycloaliphatic dicarboxylic acids;c) from 0 to 49.95 mol % of at least one compound selected from the group consisting of aromatic diols, cycloaliphatic diols, aromatic diamines and aromatic hydroxyamines;d) from 0.1 to 40 mol % of chiral, bifunctional comonomers, ande) from 0 to 5 mol % of a branchable component containing more than two functional groups, where the sum is 100 mol %.