The present invention provides an intermediate film for laminated glass which can improve the sound-insulating property. The intermediate film for laminated glass according to the present invention has a layered structure including at least two layers, comprising: a first layer containing a polyvinyl acetal resin and a plasticizer; and a second layer positioned on a first surface of the first layer. In a phase diagram of three values including a degree of acetalization, a degree of acetylation, and a hydroxy group content of the polyvinyl acetal resin contained in the first layer, the values of the degree of acetalization, the degree of acetylation, and the hydroxy group content each fall within a region surrounded by a line including four straight lines connecting a first coordinate (degree of acetalization:degree of acetylation:hydroxy group content = 70 mol%: 30 mol%: 0 mol%), a second coordinate (degree of acetalization:degree of acetylation:hydroxy group content = 34 mol%:30 mol%:36 mol%), a third coordinate (degree of acetalization:degree of acetylation:hydroxy group content = 94 mol%: 0 mol%:6 mol%), and a fourth coordinate (degree of acetalization:degree of acetylation:hydroxy group content = 100 mol%: 0 mol%: 0 mol%) in the stated order.
LAMINATED GLASS INTERMEDIATE FILM AND LAMINATED GLASS
ZWISCHENFOLIE FÜR VERBUNDGLAS UND VERBUNDGLAS
FILM INTERMÉDIAIRE DE VERRE STRATIFIÉ ET VERRE STRATIFIÉ
2020-08-19
Patent
Electronic Resource
English
IPC: | B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / C03C Chemische Zusammensetzungen für Gläser, Glasuren oder Emails , CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS / C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind |