Polyurethane heat insulation foaming material and preparation method thereof

Abstract

The invention discloses a polyurethane heat insulation foaming material and a preparation method thereof in the technical field of nano composite materials. The polyurethane heat insulation foaming material comprises the following components in part by weight: 20 to 40 parts of polyether polyalcohol, 60 to 80 parts of aromatic polyester polyalcohol, 300 to 400 parts of polymethylene polyphenyl isocyanate, 0.1 to 0.7 part of carbon nano tube base body, 5 parts of water, 10 parts of flame retardant, 4 to 5 parts of potassium acetate, 3 to 8 parts of triethanolamine, 1 to 3 parts of organic tin and 5 to 10 parts of silicon oil. The compressive strength of the polyurethane foaming material is remarkably improved, the viscosity of a foaming body cannot be remarkably improved, the cell structure of the foaming body is not changed, and the heat insulation performance of the foaming body cannot be reduced; and because the nitrogen-containing isocyanurate ring is introduced into the foaming material, the material has good flame-retardant performance under the condition of using a small amount of flame retardant.

Description

technical field [0001] The invention relates to a material and a method in the technical field of nanocomposite materials, in particular to a low-density rigid polyurethane heat-insulation and thermal insulation foam material reinforced by carbon nanotubes and a preparation method thereof. Background technique [0002] Rigid polyurethane foam material is light in weight, high in specific strength, good in dimensional stability, and has a very low thermal conductivity. It is an excellent thermal insulation material and has been widely used in transportation, construction, decoration, industrial equipment, pipelines Insulation and civil furniture and many other fields. The mechanical properties of rigid polyurethane foam materials generally increase with the increase of density, but in the field of thermal insulation applications that require light weight and certain support strength, ordinary rigid polyurethane foam materials cannot meet the use requirements. To solve this p...

AI Technical Summary

Problems solved by technology

[0007] After retrieval, it was found that Shi Lei et al. (Shi Lei, 2006, 5; Sichuan University Master's Thesis: Composite Rigid Polyurethane Foam) added carbon nanotubes acidified with concentrated acid into rigid polyurethane foam, and studied Compressive properties of composite materials, found that the addition of 2% carbon nanotubes reduces the compressive strength of rigid foam plastics

This is because the strong acid will cut off the carbon nanotubes or introduce defects in the carbon nanotubes, resulting in the destruction of the structure of the carbon nanotubes, thereby affecting the mechanical properties; Transfer load, and may become a defect in the matrix, causing stress concentration when the force is applied, so that the mechanical properties of the composite material are not only not improved but also weakened to a certain extent