Polyurethane thermal insulation material and preparation method thereof

Abstract

The invention provides a polyurethane thermal insulation material and a preparation method thereof. The material is composed of a component A and a component B, wherein according to parts by weight, the component A is prepared from 7 to 20 parts of dibromoneopentyl glycol type epoxy resin, 30 to 50 parts of polyester polyol, 20 to 40 parts of polyether polyol, 5 to 10 parts of modified expanded perlite, 20 to 40 parts of catalyst, 15 to 30 parts of flame retardant, 1 to 3 parts of stabilizer and 15 to 30 parts of foaming agent, and the component B is polyphenyl polymethylene polyisocyanate; the foaming agent is prepared from 1 to 5 parts of pentafluoropropane, 6 to 12 parts of pentafluorobutane and 2 to 6 parts of pentane; the modified expanded perlite is mainly prepared from expanded perlite, acrylic resin emulsion, a silane coupling agent and a silicone hydrophobic agent. The composite material is improved in flame retardancy while maintaining excellent compressibility and thermal insulation property.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials for external walls, and in particular relates to a polyurethane thermal insulation material and a preparation method thereof. Background technique [0002] Rigid polyurethane foam has become an irreplaceable thermal insulation material due to its low thermal conductivity, and is widely used in construction, aerospace, transportation, chemical and other fields. The density of polyurethane foam is usually about 10% higher than that of polyurethane foam prepared with CFC-11 (ie, trichlorofluoromethane) system as a blowing agent, and the polyurethane foam prepared with pentane as a blowing agent is in polyester polyol Poor solubility in medium. Using water and supercritical CO 2 The polyurethane foam prepared as a blowing agent has poor strength, dimensional stability and thermal insulation performance at low density, and consumes more isocyanate during the preparation process. ...

AI Technical Summary

Problems solved by technology

[0005] 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 polyurethane thermal insulation material. The composite material improves flame retardancy while maintaining its excellent compression performance and thermal insulation performance.

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