A kind of microcapsule foamed melamine foam material and preparation method thereof

Abstract

The invention relates to microcapsule-foaming melamine foam, which is prepared from a melamine resin prepolymer through microcapsule foaming. A used microcapsule foaming agent is a microcapsule foaming agent with a hydroxy on a wall material; the closed pore rate of the melamine foam is higher, and achieves than 96 percent or more; the heat preservation effect is better, and the heat conductivity coefficient is lower than 0.028W / m.K; the mechanical property is better, and the compression strength achieves 180KPa or more; better flame retardant property is realized, and the oxygen index achieves 37 percent or more. Used foaming liquid has only three components, and no emulsifying agent or foam stabilizer needs to be added in the melamine resin prepolymer, so that the process flow is simple, and the production cost is lower; the prepared microcapsule foaming agent with the hydroxy on the wall material can be applicable to various melamine resin prepolymers with different kinds and different viscosity, the foaming temperature is lower, and the foaming time is shorter.

Description

technical field [0001] The invention belongs to the technical field of foam materials, and in particular relates to a microcapsule foamed melamine foam material and a preparation method thereof. Background technique [0002] Melamine foam is a kind of thermosetting polymer material, which has good heat resistance, solvent resistance, electrical properties and mechanical strength, and has excellent flame retardant properties such as self-extinguishing after leaving the fire, and no molten droplets dripping when burning. . These excellent properties of melamine foam make it widely used in various industries and fields, gradually replacing other existing foam materials. But use mechanical foaming method, or use the melamine foam prepared by traditional physical blowing agent, chemical blowing agent to have various performance defects, such as the inhomogeneous cell structure of each part of the foam material, thus The performance of each part is not uniform; its opening rate ...

AI Technical Summary

Problems solved by technology

But use mechanical foaming method, or use the melamine foam prepared by traditional physical blowing agent, chemical blowing agent to have various performance defects, such as the inhomogeneous cell structure of each part of the foam material, thus The performance of each part is not uniform; its opening rate is high, which leads to good thermal conductivity of the foam and poor thermal insulation performance; its cell distribution is uneven, and it is easy to generate stress concentration points, making the compressive strength smaller; the foam cells are larger, It is difficult to form a dense protective carbon layer during combustion, and its oxygen index (OI) is generally below 32%.