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1. (WO2018181746) INTERLAYER FOR LAMINATED GLASS, AND LAMINATED GLASS

Pub. No.:    WO/2018/181746    International Application No.:    PCT/JP2018/013323
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: C03C 27/12
B32B 7/02
B32B 17/10
B32B 27/22
B32B 27/30
C08J 5/18
C08L 29/14
C08L 33/00
Applicants: SEKISUI CHEMICAL CO., LTD.
積水化学工業株式会社
Inventors: OOHIGASHI, Yuji
大東 裕司
SHINDO, Kaoru
進藤 郁
Title: INTERLAYER FOR LAMINATED GLASS, AND LAMINATED GLASS
Abstract:
Provided is an interlayer for laminated glass with which it is possible to increase the flexural stiffness of laminated glass at 23°C, and improve the sound insulation properties and piercing resistance of the laminated glass. This interlayer for laminated glass contains polyvinyl acetal resin and a plasticizer, and the gel fraction determined by formula (X) falls within the range of 10% to 80% by weight, inclusive, the glass transition temperature falls within the range of -30°C to 0°C, inclusive, and the maximum value for tanδ in the temperature region of -30°C to 0°C is at least 0.1. Formula (X): gel fraction (% by weight)=W2/W1×100 (in the formula, W1 is the weight of the interlayer before being immersed in tetrahydrofuran at 23°C, and W2 is the weight of the interlayer which has been immersed in tetrahydrofuran at 23°C and subsequently dried)