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1. (WO2018143442) LAMINATED GLASS INTERMEDIATE FILM AND LAMINATED GLASS

Pub. No.:    WO/2018/143442    International Application No.:    PCT/JP2018/003706
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Sat Feb 03 00:59:59 CET 2018
IPC: C03C 27/12
B32B 17/10
B32B 27/00
B32B 27/30
Applicants: SEKISUI CHEMICAL CO., LTD.
積水化学工業株式会社
Inventors: IWAMOTO, Tatsuya
岩本 達矢
SAKAMOTO, Yuu
坂本 悠
ISHIKAWA, Yuki
石川 由貴
KAWADA, Shinji
河田 晋治
Title: LAMINATED GLASS INTERMEDIATE FILM AND LAMINATED GLASS
Abstract:
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.