Multiple layer interlayer having improved optical and sound insulation properties
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United States of America Patent
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Nov 7, 2017
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Dec 8, 2014
filing date -
Dec 8, 2014
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Abstract
Multilayered interlayers having good acoustic properties comprising a stiff skin layer(s) and a soft core layer(s) are disclosed. The multilayered interlayers comprise: a first polymer layer (skin layer) comprising plasticized poly(vinyl acetal) resin; a second polymer layer (core layer) comprising plasticized poly(vinyl acetal) resin; wherein at least one plasticizer is a high refractive index plasticizer. The multilayered interlayers have low mottle and resist mottle formation.
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