Patent ID: 7163724
Filing Date: 2007-01-16
Classification: C08G,C09K,G02B,G02F

Abstract:
1. A process for forming a multilayer compensator for a liquid crystal display comprising coating a B layer in a solvent onto an A layer; wherein one or more A layers have in-plane retardation greater than 20 nm and one or more B layers contain an amorphous polymer, have a out-of-plane birefringence more negative than −0.01 and comprise selected polymeric materials having sufficient thickness so that the overall in-plane retardation (Rin) of said multilayer compensator is greater than 20 nm and the overall out-of-plane retardation (Rth) of said multilayer compensator is more negative than −20 nm; wherein the polymers of said one or more B layers do not have chromophores off of the backbone; the multilayer compensator is biaxial; and the term “amorphous” means that the polymer does not show long-range order as measured by X-ray diffraction.