The films and their laminates comprise THV and blends of THV with FEP, ECTFE or ECCTFE, and modified with additives, such as coupling agents, pigment or color concentrates, and IR- or UV- light...http://www.google.ca/patents/US5908704?utm_source=gb-gplus-sharePatent US5908704 - Optical and firescreening protective glazing laminates comprising fluoropolymer interlayer films and reinforcement layerA