POLYMER INTERLAYERS HAVING IMPROVED OPTICAL PROPERTIES

摘要

An interlayer comprised of a thermoplastic resin, at least one high refractive index plasticizer and, optionally, a conventional plasticizer. The use of a thermoplastic resin, a high refractive index plasticizer, and, optionally, a conventional plasticizer reduces or minimizes the optical defects caused by different refractive indices without sacrificing other characteristics of the interlayer.

主权项

1. A multiple layer polymer interlayer comprising:
poly(vinyl butyral) resin; and at least one high refractive index plasticizer having a refractive index of at least about 1.460; wherein the multiple layer polymer interlayer has at least one soft layer and at least one stiff layer, and wherein the difference between the refractive index of the soft layer and the stiff layer (Delta RI) is less than about 0.010.