High-fire-resistant rigid polyurethane foam external wall insulation material and preparation method thereof

Abstract

The invention provides a high-fire-resistant rigid polyurethane foam external wall insulation material and a preparation method thereof. The high-fire-resistant rigid polyurethane foam external wall insulation material comprises a component A and a component B. The component A comprises, by weight, 1-4 parts of chlorinated polypropylene resin, 4-16 parts of brominated epoxy resin, 60-80 parts of polyether polyol, 5-10 parts of glass beads, 1-4 parts of catalysts, 15-30 parts of fire retardants, 1-3 parts of stabilizers and 15-30 parts of foaming agents. The component B comprises polyphenyl polymethylene polyisocyanate. The foaming agents comprise 1-5 parts of pentane, 6-12 parts of amyl pentafluoride and 2-6 parts of dichloroethane. The fire resistance of the insulation material is improved while excellent mechanical property is kept.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials for external walls, and in particular relates to a high flame-retardant polyurethane rigid foam thermal insulation material for external walls and a preparation method thereof. Background technique [0002] The organic insulation materials currently used on a large scale in my country's building energy conservation mainly include EPS (polystyrene foam), PS (extruded polystyrene foam) and PU (polyurethane foam), all of which are flammable organic insulation materials. The biggest advantage is the quality Lightweight, good heat preservation and heat insulation; the biggest defect is poor fire safety, easy aging, and easy burning. If these new building energy-saving materials have not been modified by the chemical structure of flame retardant and smoke reduction, if they are simply added with flame retardants, there will be serious fire hazards, leading to frequent building fire a...

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Problems solved by technology

[0006] In view of the main problems existing in the combination of polyurethane rigid foam insulation systems at home and abroad, combined with the current research progress of polyurethane rigid foam fire and flame retardant technology, polyurethane insulation materials have reached the national standard B1 or higher fire protection level, and the single addition of flame retardant technology The problem cannot be solved, and there is a problem that the fire-proof and flame-retardant properties of polyurethane rigid foam insulation materials are contradictory with the mechanical properties. The present invention proposes a high-flame-retardant polyurethane rigid foam external wall insulation material. excellent mechanical properties

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