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US 8,574,706 B2Granted
Sound reducing wedge shaped polymer interlayers
AssigneeSolutia Inc.
InventorsJun Lu, Brian James Daer
Life of this patent
Estimating the term…
Abstract
The present invention is in the field of polymer interlayers and multiple layer glass panels comprising polymer interlayers, and, more specifically, the present invention is in the field of wedge shaped polymer interlayers.
Claims17
A windshield interlayer comprising:
- a multilayer plasticized poly(vinyl butyral) polymer sheet wherein at least one layer of said multilayer sheet comprises 40-90 phr plasticizer and has a glass transition temperature of less than 25° C. and wherein at least one other layer of said multilayer sheet is of different composition to said at least one layer comprising 40-90 phr plasticizer and having a glass transition temperature of less than 25° C., wherein said windshield interlayer is wedge shaped and has a first edge and a second edge, wherein said first edge has a thickness of at least 0.38millimeters and said second edge has a thickness that is at least 0.13 millimeters greater than said thickness of said first edge, and wherein said polymer sheet shows an improved sound transmission loss of at least two decibels relative to an equivalent polymer sheet having a glass transition temperature between 30-33° C.
A windshield comprising:
- a glass layer;
- and
- a windshield interlayer laminated to said glass layer, said windshield layer comprising:
- a multilayer plasticized poly(vinyl butyral) polymer sheet wherein at least one layer of said multilayer sheet comprises 40-90 phr plasticizer and has a glass transition temperature of less than 25° C. and wherein at least one other layer of said multilayer sheet is of different composition to said at least one layer comprising 40-90 phr plasticizer and having a glass transition temperature of less than 25° C., wherein said windshield interlayer is wedge shaped and has a first edge and a second edge, wherein said first edge has a thickness of at least 0.38 millimeters and said second edge has a thickness that is at least 0.13 millimeters greater than said thickness of said first edge, and wherein said polymer sheet shows an improved sound transmission loss of at least two decibels relative to an equivalent polymer sheet having a glass transition temperature between 30-33° C.
1 more element
A windshield comprising:
- a glazing layer;
- and
- a windshield interlayer laminated to said glazing layer, said windshield layer comprising:
- a multilayer plasticized poly(vinyl butyral) polymer sheet wherein at least one layer of said multilayer sheet comprises 40-90 phr plasticizer and has a glass transition temperature of less than 25° C. and wherein at least one other layer of said multilayer sheet is of different composition to said at least one layer comprising 40-90 phr plasticizer and having a glass transition temperature of less than 25° C., wherein said windshield interlayer is wedge shaped and has a first edge and a second edge, wherein said first edge has a thickness of at least 0.38 millimeters and said second edge has a thickness that is at least 0.13 millimeters greater than said thickness of said first edge, and wherein said polymer sheet shows an improved sound transmission loss of at least two decibels relative to an equivalent polymer sheet having a glass transition temperature between 30-33° C.
1 more element
Dependencies are inferred from the claim text.