POLYMER INTERLAYERS COMPRISING A BLEND OF TWO OR MORE RESINS

摘要

An interlayer comprised of a blend of thermoplastic resins and at least one high refractive index having improved acoustic and optical quality is disclosed. The use of a blend thermoplastic resins and a high refractive index plasticizer improves transparency and acoustic properties without sacrificing other characteristics of the interlayer.

主权项

1. A monolithic polymer interlayer comprising:
a first poly(vinyl butyral) resin having a first residual hydroxyl content; a second poly(vinyl butyral) resin having a second residual hydroxyl content, wherein the difference between the first residual hydroxyl content and the second residual hydroxyl content is at least 2.0 weight percent; and a plasticizer having a refractive index of at least 1.460.