LIGHT REFLECTIVE, SELF-ASSEMBLING BLOCK COPOLYMER FILM OR COATING, METHODS FOR THEIR PREPARATION AND USE THEREOF

摘要

A multilayer light reflective self assembly film or coating which reflects light of a desired wavelength is obtained by blending block copolymer fractions of different molecular weight. The colour of light reflected by the film or coating depends on the relative amounts of the block copolymers in the blend. Thus, the colour of the reflected light is selectable by varying the relative amounts of the block copolymers in the blend. The polymers may be cross-linked by means of a suitable cross-linking agent. Applications of the film or coating include anti- counterfeiting devices.