HIGH RIGIDITY INTERLAYERS AND LIGHT WEIGHT LAMINATED MULTIPLE LAYER PANELS

摘要

This disclosure is related to the field of polymer interlayers for multiple layer panels and multiple layer panels having at least one polymer interlayer sheet. Specifically, this disclosure is related to the field of high rigidity interlayers and light weight laminated multiple layer panels incorporating high rigidity interlayers.

主权项

1. A multilayer interlayer comprising:
a first polymer layer comprising a first poly(vinyl butyral) resin and at least one plasticizer; a second polymer layer adjacent to and in contact with said first polymer layer, wherein said second polymer layer comprises a second poly(vinyl butyral) resin and at least one plasticizer; and a third polymer layer comprising a third poly(vinyl butyral) resin and at least one plasticizer, wherein said second polymer layer is adjacent to and in contact with said first and said third polymer layers, wherein said second poly(vinyl butyral) resin has a residual hydroxyl content that is at least 7 weight percent different than the residual hydroxyl content of said first poly(vinyl butyral) resin and/or said third poly(vinyl butyral) resin, wherein said second polymer layer has a glass transition temperature of less than 9° C. and a maximum thickness of not more than 9 mils, wherein at least one of said first polymer layer and said third polymer layer has a glass transition temperature of at least 33° C. and a thickness greater than 13 mils.