Patent ID: 9586386
Date: 2017-03-07
CPC Classifications: B32B,C08L

Claim:
1. A polymer interlayer comprising: a first resin layer comprising— wherein said first resin layer comprises at least 0.5 weight percent of said second poly(vinyl acetal) resin, based on the combined weight of said first and said second poly(vinyl acetal) resins, and wherein said first resin layer has a refractive index of at least 1.480; and a plasticizer having a refractive index of at least 1.460, wherein the glass transition temperature of said first resin layer is at least 26° C., and further comprising an adjacent resin layer in contact with said first resin layer in said interlayer, wherein said adjacent resin layer comprises another poly(vinyl acetal) resin and a plasticizer, wherein said another poly(vinyl acetal) resin has a residual hydroxyl content that is at least 2 weight percent lower than the residual hydroxyl content of said first poly(vinyl acetal) resin, and wherein said adjacent resin layer has a glass transition temperature of less than 25° C.