HYBRID ACOUSTIC INTERLAYER CONSISTING OF AN ADHESIVE CORE LAYER MADE OF POLYMER-MATRIX NANOCOMPOSITES

摘要

The present invention relates to an interlayer for laminated glasses, comprising two outer layers of a material selected from poly(vinyl butyral) (PVB) and poly(ethylene-vinyl acetate) (EVA), assembled by means of an adhesive nanocomposite layer comprising: - a first, discontinuous phase consisting of polymeric nanodomains having a glass transition temperature (Tg) of between -50°C and -30°C, preferably between -45°C and -35°C, and- a second, continuous polymeric phase, referred to as the matrix, having a glass transition temperature (Tg) lower than that of said first phase, preferably a Tg of less than -50°C, and in particular less than -60°C,the first phase being dispersed in the second phase.The present invention also relates to a method for manufacturing an interlayer as stated above and also to a laminated glazing unit comprising an interlayer of this kind.