Polyurethane thermal insulation material and preparation method thereof
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A thermal insulation and polyurethane technology, which is applied in the field of external wall thermal insulation materials, can solve the problems of conflict between fire and flame retardant properties and mechanical properties.
Inactive Publication Date: 2017-12-29
合肥泓定科技有限公司
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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 probl
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Embodiment 1
[0022] The preparation method of modified expanded perlite is:
[0023] Add the expanded perlite to the acrylic resin emulsion and stir evenly, then add KH550 and triethoxysilane, heat in a water bath to 50°C, stir well, react for 3 hours, then remove and dry.
Embodiment 2
[0025] The preparation method of modified expanded perlite is:
[0026] Add the expanded perlite to the acrylic resin emulsion and stir evenly, then add KH560 and triethoxysilane, heat in a water bath to 70°C, stir well, react for 2 hours, then remove and dry.
Embodiment 3
[0028] A polyurethane thermal insulation material, which is composed of component A and component B. Calculated in parts by weight, component A consists of 15 parts of dibromopentaerythyl glycol type epoxy resin, 40 parts of polyester polyol, polyether polyol 30 parts of alcohol, 7 parts of modified expanded perlite of Example 1, 1 part of dibutyltin laurate, 15 parts of dimethyl methyl phosphate, 1 part of silicone oil and 15 parts of foaming agent, component B is polyphenyl Polymethylene polyisocyanate, the blowing agent is composed of 1 part of pentafluoropropane, 6 parts of pentafluorobutane and 4 parts of cyclopentane. The mixing weight ratio of A component and B component is 1:1.
[0029] Preparation method: pre-mix dibromopentaerythritol type epoxy resin, polyester polyol, polyether polyol, cyclopentane and pentafluorobutane, and add the modified expanded perlite, silicone oil, Dibutyltin laurate, dimethyl methyl phosphate and pentafluoropropane are used to obtain comp...
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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. ...
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