Multilayer Films Of Plasticizer-Containing Polyvinyl Acetal With Photochromic Properties
AssigneeKuraray Europe GmbH
InventorShinichi MUGURUMA
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Abstract
Photochromic interlayer films for laminated glass are composed of at least two individual films based on plasticizer-containing polyvinyl acetal, individual films of the interlayer film containing at least one photochromic compound, wherein the individual films having photochromic compounds have glass transition temperatures which differ from each other by at least 5 K.
Claims18
A photochromic interlayer film for laminated glass, comprising at least two individual films of plasticizer-containing polyvinyl acetal, each of said at least two individual films comprising at least one photochromic compound, wherein the at least two individual films have glass transition temperatures which differ by at least by 5 K.
Dependencies are inferred from the claim text.