Interlayer for laminated glass and laminated glass
AssigneeSekisui Chemical Co., Ltd.
InventorsShouta Matsuda, Kozo Nakamura, Michio Shimamoto, Sinyul Yang
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Abstract
The present invention provides an interlayer film for laminated glass, that exhibits an excellent sound-insulating performance for solid-borne sound in an environment at or below 0° C. Another object is to provide laminated glass that is obtained using this interlayer film for laminated glass. The present invention is an interlayer film for laminated glass, that has a sound-insulating layer for which a temperature T1, which is the temperature that gives the maximum value of tan δ at a frequency of 1 Hz, is in the range from −30° C. to 0° C.
Claims9
An interlayer film for laminated glass,
- comprising a sound-insulating layer for which a temperature T1, which is a temperature that gives a maximum value of tan δ at a frequency of 1 Hz, is in a range from −30° C. to 0° C.,
- wherein the sound-insulating layer contains 71 parts by weight or more of a plasticizer with respect to 100 parts by weight of a polyvinyl acetal resin that has 3 or 4 carbons in an acetal group,
- wherein the polyvinyl acetal resin that has 3 or 4 carbons in the acetal group has an acetyl group content of 5.1 to 30 mol % and a hydroxyl group content of 18.5 mol % or more, and
- wherein the sound-insulating layer is interposed between two protective layers.
Dependencies are inferred from the claim text.