Spray finishing polyurethane rigid foam raw material and foam produced thereof

Abstract

The invention relates to a sprayed rigid polyurethane foam raw material and foam produced therefrom. The sprayed rigid polyurethane insulation foam raw material comprises an isocyanate component and a polyol component, and can be used in various insulating fields. The sprayed rigid polyurethane foam raw material comprises component A and component B, the volume ratio of the component A to the Component B ranges from 1:1 to 1.5:1; the component A is of isocyanate and the component B is of polylol and various additives, and the optional additives comprise a catalyst, a foam stabilizer, a flame retardant and a foaming agent. The sprayed rigid polyurethane foam raw material is characterized in that the foaming agent comprises a chemical foaming agent and a physical foaming agent, the chemical foaming agent is of water, and the physical foaming agent comprises a main foaming agent accounting for 0.1%-30% of the component B and other physical foaming agents based on mass percentage. Products constructed with the foam raw material have good adhesive force and flame retardance, low thermal conductivity and good dimensional stability. The raw material can be conveniently used for rigid polyurethane foam construction in the insulation fields including external wall insulation of buildings.

Description

technical field [0001] The invention relates to a polyurethane rigid foam raw material and a foam prepared from the polyurethane rigid foam raw material, belonging to the technical field of polyurethane foam. Background technique [0002] Polyurethane rigid foam has good thermal insulation performance, and the thermal insulation effect of 25mm thick polyurethane rigid foam is equivalent to 40mm thick polystyrene foam EPS, 45mm mineral wool, 380mm thick concrete or 860mm Ordinary brick. Under the same heat preservation effect, the thickness is about half that of EPS. According to thermal engineering calculations, in order to achieve the goal of 65% building energy saving in North my country, the thickness of rigid polyurethane foam only needs to be 3 cm, while the thickness of EPS board needs to be more than 7 cm, and the thickness of extruded polystyrene XPS board needs to be more than 5 cm. Therefore, polyurethane rigid foam boards are widely used in various fields that r...

AI Technical Summary

Problems solved by technology

[0004] However, the spraying system currently available on the market will cause many problems when the thermal insulation layer is constructed at an ambient temperature of -10 degrees to 50 degrees, such as poor adhesion between the foam and the substrate, poor adhesion between foam layers, and poor adhesion during construction. There is a sag phenomenon, it is difficult to ensure the smooth surface of the foam, the density of the foam is high, and the output rate becomes low. Such problems make the construction of composite materials very uneconomical and cause great engineering safety hazards

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