PHOTOCHROMIC LAMINATE OF GLASS AND POLYVINYL BUTYRAL RESIN

摘要

A laminate has first and second layers of glass between which are sandwiched first and second layers of polyvinyl butyral resin wherein the first polyvinyl butyral resin layer consists essentially of polyvinyl butyral resin and an ultraviolet absorber and the second polyvinyl butyral resin layer consists essentially of a polyvinyl butyral resin, a hotochromic moiet and a free radical inhibitor