Patent ID: 8298671

Claim:
A photochromic polyurethane laminate for use in an optical article comprising: a first resin sheet; a second resin sheet; and a photochromic polyurethane layer having a top side attached to said first resin sheet and a bottom side attached to said second resin sheet, said photochromic polyurethane layer prepare from a composition comprising: a solid thermoplastic polyurethane prepared from a composition comprising at least one diisocyanate selected from a group consisting of: aliphatic diisocyanate and cycloaliphatic diisocyanate; at least one isocyanate-terminated polyurethane prepolymer; and at least one photochromic compound; wherein said photochromic polyurethane laminate has a molecular structure resulting from curing said laminate within a temperature range from about 50 degrees Celsius to about 130 degrees Celsius.