Flame-retardant rigid polyurethane foam heat insulation plate

Abstract

The invention relates to a flame-retardant rigid polyurethane foam heat insulation plate. The flame-retardant rigid polyurethane foam heat insulation plate comprises a component A and a component B, wherein the component A is formed by mixing flame-retardant polyether or flame-retardant polyether polyol, amidogen ether polyol, common polyether polyol, a foam stabilizer, a catalyst, a reactive flame retardant, modified expandable graphite and a foaming agent according to a certain proportion. The component B is isocyanate. The component A and the component B are mixed, and then are subjected to compression molding to obtain the flame-retardant heat insulation plate. According to the prepared flame-retardant rapid polyurethane foam heat insulation plate, flame-retardant testing data exceed a GB8624-2012B1-grade flame-retardant standard, the oxygen index is up to 48.9, and the heat conduction coefficient is about 0.02W / m.k. The flame-retardant rigid polyurethane foam heat insulation plate has excellent compressive strength and bending resistance strength. The flame-retardant rigid polyurethane foam heat insulation plate is suitable for being applied to the fields of flame retardance and heat insulation of building walls, refrigeration houses, refrigerators, solar water heaters and the like.

Description

technical field [0001] The invention relates to the field of flame retardant and heat preservation of building walls, cold stores, refrigerators and solar water heaters, in particular to a flame retardant polyurethane rigid foam heat preservation board without added flame retardant. Background technique [0002] The country attaches great importance to building energy conservation, and thermal insulation materials are the key to building energy conservation. At present, the three major insulation boards that occupy the largest proportion of the building insulation market are benzene board, extruded board and polyurethane rigid foam board. Compared with benzene board and extruded board, polyurethane rigid foam board has great advantages in flame retardancy and thermal insulation performance. With the national fire department's emphasis on flame retardancy, the requirements for flame retardancy of thermal insulation materials have also increased. In order to meet the GB 8624...

AI Technical Summary

Problems solved by technology

This kind of organic flame retardant does not participate in the molding reaction of polyurethane rigid foam, but only exists in the phase of polyurethane rigid foam as an additive. As time goes by, small molecules of flame retardant are released, resulting in a decrease in flame retardant index

In addition, during the production and construction of insulation materials, the existence of a large number of organic flame retardant additives will make the construction environment harsh and cause environmental pollution.

Inorganic flame retardants are also often used in the production of insulation boards, such as magnesium hydroxide, aluminum hydroxide, etc. Excessive addition of such flame retardant additives will also reduce the mechanical properties and thermal insulation properties of insulation materials

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