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|1. (WO2018143442) LAMINATED GLASS INTERMEDIATE FILM AND LAMINATED GLASS|
|Applicants:||SEKISUI CHEMICAL CO., LTD.
|Title:||LAMINATED GLASS INTERMEDIATE FILM AND LAMINATED GLASS|
Provided is a laminated glass intermediate film that can improve the sound-insulating properties of laminated glass. This laminated glass intermediate film has a one-layer structure or a two- or more layer structure and comprises a first layer that has a glass transition temperature, as measured by dynamic viscoelasticity measurement, of -30℃–10℃. When the glass transition temperature of the first layer in units of ℃ as measured by dynamic viscoelasticity measurement is Tg, the loss tangent tanδ of the first layer at Tg satisfies formula (1) and formula (2). (1) (the loss tangent tanδ of the first layer at Tg)≥1.55. (2) (the loss tangent tanδ of the first layer at Tg)=A×(Tg-a first storage modulus G' for the first layer at 10℃/Tg+a second storage modulus G' for the first layer at 10℃)+B. In formula (2), A is 0.003–0.04, and B is 0.7–1.4.