Hard polyurethane adiabatic heat-insulation foam material and preparation method thereof

Abstract

The invention relates to a hard polyurethane adiabatic heat-insulation foam material and a preparation method thereof. The material contains the following components: polyether glycol, polymethylene polyphenyl isocyanate, chopped glass fiber powder, physical foaming agent, water, fire retardant, catalyst and foam stabilizer. The preparation method comprises that the surface of the chopped glass fiber powder is treated through silane coupling agent; and the polyether glycol, polymethylene polyphenyl isocyanate and the surface-treated chopped glass fiber powder are dried, mixing treatment and polymerization foaming treatment are sequentially conducted thereafter, curing treatment is conducted after a pouring mould blank is obtained and the mould is removed, and finally hard polyurethane foam is obtained. Since the invention adopts the third-generation zero-ozone-consumption latent-energy hydrofluorocarbon foaming agent and the halogen-free high-efficiency fire retardant, the foam material has the advantages of environmental protection, low density and excellent compression property and is suitable for use in the heat insulation field.

Description

technical field [0001] The invention relates to a foaming material in the technical field of polyurethane materials and a preparation method thereof, in particular to a rigid polyurethane thermal insulation foaming material and a preparation method thereof. Background technique [0002] Due to its low thermal conductivity, rigid polyurethane foam has become an irreplaceable thermal insulation material and is widely used in construction, aerospace, transportation and other fields. With the prohibition of the use of chlorofluorocarbons (CFCs) blowing agents, the restriction of the use of hydrochlorofluorocarbons (HCFCs) blowing agents, the blowing agent of zero ODP (Ozone Depression Potential ozone depletion potential) has become a research hotspot, such as water, Supercritical CO 2 , pentanes, hydrofluorocarbons (HFCs), etc. However, the disadvantage of the pentane blowing agent is that it is flammable, and the mixture with air can explode under certain conditions, so some ...

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Problems solved by technology

[0006] Some discussions at home and abroad about glass fiber (Li Guozhong, Yu Yanzhen, Discussion on the Mechanism of Glass Fiber Strengthening Rigid Polyurethane Foam Plastics, Polymer Materials Science and Engineering, 1997, 14(4): 130-133), glass microspheres (Jiang Xin et al., Glass Microspheres Reinforced the Properties of Rigid Polyurethane Foam, 2008, 24(11):62-65), SiO 2 (Liu Xinjian, glass fiber / micron SiO 2 The preparation and performance of reinforced rigid polyurethane foam, master thesis of Yanshan University, 2005) and other articles on reinforced polyurethane foam materials, mostly use water as a blowing agent, and the focus of research is to use these materials to increase the mechanical properties of polyurethane foam materials. Performance, but ignores the thermal conductivity of the enhanced material, often such enhanced materials cannot be used as thermal insulation materials

And there is no report of using chopped glass fiber powder as a reinforcing filler, combined with HFCs third-generation foaming agent, to prepare a rigid polyurethane foam thermal insulation material with good thermal insulation performance and excellent mechanical properties

[0007] To sum up, there is no density between 40 ~ 80Kg / m 3 , the foaming agent used is environmentally friendly, the thermal insulation performance is excellent, and the rigid polyurethane foam insulation material with excellent compression performance has been reported

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