Siloxane-based film for a suspended-particle-device light valve and method of preparing the film

摘要

A film suitable for use as a light-modulating unit of a suspended particle device (SPD) light valve. The film comprises a siloxane matrix polymer which has a refractive index>1.4630 and has droplets of a liquid light valve suspension distributed within the matrix. The liquid light valve suspension preferably comprises a polyalkyl (meth)acrylate and/or fluorinated (meth)acrylate suspending polymer and optionally may comprise one or more non-polymeric liquids.