INTERMEDIATE FILM FOR LAMINATED GLASS, AND LAMINATED GLASS

摘要

PROBLEM TO BE SOLVED: To provide an intermediate film for laminated glass, excellent in insulation of a structure borne sound in an environment at 0°C or lower.

SOLUTION: The intermediate film for laminated glass is formed by laminating an intermediate layer between two protective layers. The intermediate layer contains at least 50 pts.wt. of a plasticizer per 100 pts.wt. of a polyvinyl acetal resin. The polyvinyl acetal resin has an acetal group (A) acetalized by a 2-4C aldehyde (A) and an acetal group (B) acetalized by a 5-12C aldehyde (B). Per the sum of an acetalization degree (A) by the acetal group (A) and an acetalization degree (B) by the acetal group (B), the content of the acetalization degree (A) is 50-95%.

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