Thermosetting modified polystyrene board and its production process

Abstract

The invention discloses a thermosetting modified polystyrene board and a production technology thereof. The thermosetting modified polystyrene board comprises the following raw materials: polystyrene particles, cement, rubber powder, polypropylene fiber, a foaming agent, a water repellent and water. The production technology comprises the following steps: uniformly mixing and stirring the polystyrene particles, the cement, the rubber powder, the polypropylene fiber, the water repellent and the water to obtain mixed liquid A; adding the foaming agent into the mixed liquid A, and uniformly mixing in a heating condition to obtain mixed liquid B; and moulding the mixed liquid B to obtain the polystyrene board. The invention has the following beneficial effects: in the polystyrene board, the polypropylene fiber, the water repellent and the foaming agent are added into the polystyrene particles through high-speed stirring so that the inorganic polymer is uniformly dispersed into the polystyrene board; and by adding the water repellent, the water absorption rate of the polystyrene board can be reduced, and the produced polystyrene board overcomes the phenomena of falling, cracking and efflorescence while the polystyrene board is relatively light and the thermosetting property and the fire resistance are both improved.

Description

Technical field [0001] The invention relates to the field of construction, in particular to a thermosetting modified polystyrene board and a production process thereof. Background technique [0002] Polystyrene board is used as a protective layer for the waterproof layer, the full name is polystyrene foam board. It is a white solid with a fine closed-cell structure that is made of expandable polystyrene beads containing a volatile liquid foaming agent, which is pre-heated and then heated in a mold. It is often used as the insulation layer of building walls, roof insulation, and composite insulation boards; it is used as insulation material for refrigeration equipment of vehicles, ships and cold storage. [0003] At present, the existing production process of polystyrene board is to infiltrate the inorganic polymer into the inside of the polystyrene board by the infiltration method to increase its thermosetting and fire resistance. However, the infiltration method may have uneven p...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing polystyrene board production process is to infiltrate the inorganic polymer into the interior of the polystyrene board by the infiltration method to increase its thermosetting and fire resistance, and the infiltration method may have uneven infiltration, which makes the produced polystyrene board The water absorption rate of the board is relatively high, and there will be pan-alkaline phenomenon. The high water absorption rate will cause the polystyrene board to be prone to cracking, deformation, shrinkage, and easy breakage in actual use.

As a kind of thermoplastic polymer insulation material, polystyrene board usually softens and melts when heated, the heat release amount of combustion is large, and the amount of smoke is also large. After being exposed to fire, shrinkage and melting will lead to generation of heat in the insulation system. The cavity burns violently in the flashover state, and the burning drips are ignitable, so because the fire resistance of polystyrene board is relatively poor, its large-scale application also brings frequent fires