Fire-resistant hard foamed polyurethane composite board and fire protection strip preparation method

Abstract

The invention discloses a method to make fire retardant hard foam polyurethane composite plates. Firstly, fire retardant polymeric sheets are made. While a polyurethane foaming machine is used to foam polyisocyanate and flame retardant premixed polyether polyol into hard foam polyurethane plates, the fire retardant polymeric sheets are compounded onto both sides of the hard foam polyurethane plates to make the fire retardant hard foam polyurethane composite plates. The invention can effectively retard flame; the process is simple; the product is used conveniently.

Description

technical field [0001] The invention relates to a method for manufacturing a fire-resistant insulation board for building exterior walls, in particular to a method for manufacturing a fire-resistant rigid foam polyurethane composite board. Background technique [0002] In the prior art, a method for making an external insulation layer of an external wall of a building with an application number of 01123683.3 is disclosed. It is to paste the polystyrene insulation board on the wall with polymer mortar, and then scrape the insulation layer with polymer mortar. Spread glass fiber mesh cloth on its surface and scrape it again with polymer mortar. When the outer insulation layer of the building exterior wall made by this method is exposed to fire or high temperature, the insulation material (polystyrene insulation board) is likely to melt and flow, causing the fire to spread and cause a large-scale fire. [0003] In the prior art, a process method for producing rigid polyurethan...

AI Technical Summary

Problems solved by technology

When the outer insulation layer of the building exterior wall made by this method encounters fire or high temperature, the insulation material (polystyrene insulation board) is prone to melt and flow, causing the fire to spread and cause a large-scale fire

[0003] In the prior art, a process method for producing rigid polyurethane composite panels with the application number 200510045579.4 is disclosed. The process method is to first make a polymer sheet for later use. The polymer sheet is made by mixing adhesive and inorganic powder. Finally, the mixture and non-woven fabric are passed through the polymer sheet production line to produce a polymer sheet, and then the polyisocyanate and combined polyether are foamed into a polyurethane sheet with a continuous production line of a polyurethane foaming machine. Composite to both sides of the polyurethane board to produce a polyurethane composite board. The composite board made by this method cannot meet the fire protection design and construction requirements of the external thermal insulation system of the building's external wall because the polymer sheet is flammable.

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