Interlayers comprising modified fumed silica
First Claim
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1. An interlayer, comprising:
- a polymer sheet comprising poly(vinyl butyral)and 0.1 to 10 phr by weight fumed silica, wherein said fumed silica is alkylated, said polymer sheet has a glass transition temperature of less than 40°
C., and wherein said interlayer is adapted for use as layer in a multiple layer glazing and does not comprise additional polymer sheets.
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Abstract
The present invention includes polymer interlayers that are used in multiple layer glazing panels. Interlayers of the present invention comprise a thermoplastic polymer, a plasticizer, and a fumed silica that has been modified to impart hydrophobic character. Interlayers incorporating such components have improved tensile modulus, moisture resistance, creep performance, anticorrosion effect, glass adhesion, and are well suited to a variety of applications, including, but not limited to, acoustic applications.
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Citations
18 Claims
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1. An interlayer, comprising:
a polymer sheet comprising poly(vinyl butyral)and 0.1 to 10 phr by weight fumed silica, wherein said fumed silica is alkylated, said polymer sheet has a glass transition temperature of less than 40°
C., and wherein said interlayer is adapted for use as layer in a multiple layer glazing and does not comprise additional polymer sheets.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multiple layer glass panel comprising an interlayer, wherein said interlayer comprises:
a polymer sheet comprising poly(vinyl butyral) and 0.1 to 10 phr by weight fumed silica, wherein said fumed silica is alkylated, said polymer sheet has a glass transition temperature of less than 40°
C., and wherein said interlayer does not comprise additional polymer sheets.- View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of forming a multiple layer glazing, comprising:
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providing a polymer sheet comprising poly(vinyl butyral) and 0.1 to 10 phr by weight fumed silica, wherein said fumed silica is alkylated, said polymer sheet has a glass transition temperature of less than 40°
C.; and
,laminating said polymer sheet between two panes of glass to form said glazing.
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Specification