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US 2019/0099986 A1Published application
High rigidity interlayers and light weight laminated multiple layer panels
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 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.
Claims20
A multi-layer interlayer comprising:
- a first stiff polymer layer;
- a soft polymer layer in contact with said first stiff polymer layer;
- a second stiff polymer layer;
- wherein said soft polymer layer is between said first and said second stiff polymer layers;
- wherein at least one of the stiff polymer layers has a plasticizer content of less than or equal to about 35 phr, wherein the soft polymer layer has a plasticizer content of greater than or equal to about 48 phr,
- wherein the multi-layer interlayer has an equivalent glass transition temperature, Teq, of greater than or equal to 29° C.;
- and,
- wherein the soft polymer layer has a glass transition temperature of less than 30° C., and wherein at least one of the stiff polymer layers has a glass transition temperature of greater than 33° C.
5 more elements
A multi-layer interlayer comprising:
- a first plasticized stiff polymer layer;
- a second plasticized stiff polymer layer in contact with said plasticized soft polymer layer;
- a plasticized soft polymer layer in contact with said first plasticized stiff polymer layer and said second plasticized stiff polymer layer;
- wherein at least one of the stiff polymer layers has a plasticizer content of less than or equal to about 28 phr, wherein the soft polymer layer has a plasticizer content of greater than or equal to about 48 phr, and,
- wherein the first stiff polymer layer and second stiff polymer layer have a glass transition temperature of greater than 33° C.
2 more elements
A multi-layer interlayer comprising:
- a first stiff polymer layer comprising plasticized poly(vinyl butyral);
- a soft polymer layer comprising plasticized poly(vinyl butyral) in contact with said first stiff polymer layer;
- a second stiff polymer layer comprising plasticized poly(vinyl butyral) in contact with said soft polymer layer;
- wherein the residual hydroxyl content in the soft polymer layer is at least 3 wt. % lower than the residual hydroxyl content in the stiff polymer layers;
- wherein at least one of the stiff polymer layers has a plasticizer content of less than or equal to about 35 phr, wherein the soft polymer layer has a plasticizer content of greater than or equal to about 48 phr, and
- wherein the stiff polymer layers have a glass transition temperature of greater than 33° C.
3 more elements
Dependencies are inferred from the claim text.