High-strength sound-insulation heat-resistant filler for metal door and preparation method of high-strength sound-insulation heat-resistant filler

Abstract

The invention relates to a high-strength sound-insulation heat-resistant filler for a metal door and a preparation method thereof, and belongs to the technical field of functional materials. The filler comprises a bonding layer material and a heat-resistant sound-insulation layer material, wherein the bonding layer is formed by compounding epoxy resin, nano-fibers, wollastonite, alloy fibers, a CTBN toughening agent and the like; the sound insulation layer takes a polyimide precursor as a matrix, and components such as core-shell functional particles and hollow glass beads are added; according to the core-shell particles, mesoporous silica aerogel is used as a porous sound absorption core layer, and boron nitride is used as a rigid shell layer. During preparation, the bonding layer slurry is injected into the metal door for curing, and then the sound insulation layer mixture is filled for supercritical foaming forming. The problems that sound insulation, heat insulation and strength cannot be considered at the same time, and cracking and falling are caused by thermal expansion mismatch of a traditional filler are solved, and the filler is suitable for high-end metal doors.

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