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US 9,833,976 B2Granted
Defect resisting acoustic polymer interlayers
AssigneeSolutia Inc.
InventorJun Lu
Life of this patent
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Abstract
This disclosure is related to the field of polymer interlayers for multiple layer glass panels and multiple layer glass panels having at least one polymer interlayer sheet. Specifically, this disclosure is related to the field of polymer interlayers comprising multiple thermoplastic layers which resist the formation of optical defects.
Claims11
A polymer interlayer comprising:
- a first polymer layer comprising plasticized poly(vinyl butyral) having a molecular weight less than 140,000 Daltons;
- a second polymer layer comprising plasticized poly(vinyl butyral) having a molecular weight greater than 140,000 Daltons;
- a third polymer layer comprising plasticized poly(vinyl butyral) having a molecular weight less than 140,000 Daltons;
- wherein said second polymer layer is disposed between said first polymer layer and said third polymer layer, thereby resulting in a polymer interlayer having two skin layers and a core layer, and wherein said second polymer layer comprises a higher level of total plasticizer than said first and said third polymer layers, and wherein said first polymer layer and said third polymer layer have a stress relaxation modulus, G′(t), measured at a temperature of 150° C. and a time of 100 seconds, in the range of from 0.10 to 100 Pascals.
1 more element
Dependencies are inferred from the claim text.