Structured films with a controlled tilted molecular orientation and shape using a dichroic photoinitiator.

摘要

The invention relates to Process for the preparation of a layer comprising oriented molecules on a substrate, comprising the steps of
a. providing a substrate
b. applying a film of a coating composition on the substrate
c. forming a splay or bend liquid crystalline structure within the film
d. applying a dose of electromagnetic radiation to the film to at least partly cure the film,
wherein the coating composition comprises at least one liquid crystalline material having at least one polymerizable group and a monomer having at least two polymerizable groups, and a dichroic photoinitiator. The invention relates to the preparation of three dimensional structures by using a polarization hologram on a coating composition which has a splay orientation.