Search International and National Patent Collections
|1. (WO2018181746) INTERLAYER FOR LAMINATED GLASS, AND LAMINATED GLASS|
|Applicants:||SEKISUI CHEMICAL CO., LTD.
|Title:||INTERLAYER FOR LAMINATED GLASS, AND LAMINATED GLASS|
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)