Polymeric interlayers and multiple layer panels made therefrom exhibiting enhanced properties and performance

An interlayer comprising:

• a first outer polymer layer comprising a first poly(vinyl acetal) resin and at least one plasticizer, wherein said first poly(vinyl acetal) resin has a first residual hydroxyl content of at least 18.5 weight percent and a plasticizer content of not more than 25 parts per hundred resin (phr);
• and wherein said first outer polymer layer has a glass transition temperature greater than 35° C.;
• and
• a second outer polymer layer comprising a second poly(vinyl acetal) resin and at least one plasticizer, wherein said second poly(vinyl acetal) resin has a second residual hydroxyl content of at least 18.5 weight percent and a plasticizer content of not more than 35 phr, and wherein the difference between said first and said second residual hydroxyl contents is at least 5 weight percent,
• wherein each of said first and said second outer polymer layers are each configured to be in direct contact with one of a pair of substrates when said interlayer is laminated between said pair of substrates to form a multiple layer panel, and
• wherein when said interlayer is laminated between two sheets of glass each having a thickness of 2.3 mm to form a laminate, the laminate has a mean break height, measured according to ANSI/SAE Z26.1-1996 at a temperature of 70° F. and an interlayer thickness of 30 mils, of at least 13 feet, and
• wherein the multiple layer panel passes the Hurricane Impact test at a total interlayer thickness of 90 mils.