US Patent 7632568 Solar control multilayer film

A multilayer film article is disclosed. The multilayer film article includes an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type, an infrared light absorbing nanoparticle layer including a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder and having a thickness in a range from 1 to 20 micrometers. The nanoparticle layer being disposed adjacent the multilayer film. The metal oxide nanoparticles include tin oxide or doped tin oxide.