Flame-retardant heat-resistant polyurethane foaming plastic and preparation method thereof
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A technology of foamed plastics and polyurethane, applied in the field of polyurethane foamed plastics
Active Publication Date: 2013-08-14
DALIAN UNIV OF TECH
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[0004] The object of the present invention is to overcome the disadvantages of low heat resistance and flammability of polyurethane foam plastics in the prior art, or add a halogen flame retardant, and release toxic gas when burning , the defect of large amount of smoke, so as to provide a flame-retardant heat-resistant polyurethane foam, which is environmentally friendly, halogen-free, and excellent in flame retardancy; in addition, the invention also provides its preparation method, which is simple in process and easy to operate
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Embodiment 1
[0044] Proportionally mix polyester polyol and heterocyclic polyol A (G=H, X, R 8 , R 9 Both are chemical bonds), catalyst A-33 0.5g, dibutyltin dilaurate 0.5g, silicone oil, flame retardant polyol FRC-6 10g, TMP and water into the reaction kettle, mix well at 50°C, add TDI and mix well , injected into a mold for foaming, and then cured in an oven at 50°C for 2 hours to obtain a flame-retardant heterocyclic polyurethane foam product. The limiting oxygen index LOI is 28.
[0045] The obtained product is detected by the following test methods:
[0046] Infrared spectrum test: FTIR-430 Spectrometer produced by Japan JASCO Company was used to test the infrared spectrum of polyurethane foam plastics by film reflection or potassium bromide tablet method.
[0047] The limiting oxygen index is tested according to ASTM D-2863 standard.
[0048] figure 1 Medium 3138.43cm -1 It is the C-H stretching vibration absorption peak on the benzene ring; 3093.59cm -1 and 2978.29cm -1 at ...
Embodiment 2
[0050] Add polyether polyol 4110, heterocyclic polyol B, dibutyltin dilaurate and triethanolamine 0.2g, bromobutylmethylimidazolium salt, silicone oil, 30g flame retardant polyol Fyrol-6, DMP and water into the reactor, Mix well at 50°C. Add PAPI, stir and mix, pour into a mold for foaming, and then mature in an oven at 60° C. for 1 hour to obtain a flame-retardant heterocyclic polyurethane foam product. The limiting oxygen index LOI is 27.
Embodiment 3
[0052] Polyether polyol 4110, heterocyclic polyol A (G=H, X, R 8 , R 9 Both are chemical bonds), catalyst A-33 0.6g, dibutyltin dilaurate 0.3g, phosphorus hexafluoride butylmethylimidazolium salt, silicone oil, 30g flame retardant polyol FRC-6, TMP and water were added to the reactor, at 50 °C and mix well. Add MDI-100, stir and mix, pour into a mold for foaming, and then mature in an oven at 80°C for 2 hours to obtain a flame-retardant heterocyclic polyurethane foam product. The limiting oxygen index (LOI) is 30.
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Abstract
The invention belongs to high molecular materials and in particular relates to flame-retardant heat-resistant polyurethane foaming plastic. The polymer, namely the flame-retardant heat-resistant polyurethane foaming plastic, contains a residue structure obtained after reaction of heterocyclic polyol and polyisocyanate, and a flame retardant or flame-retardant polyol is added in the preparation process. The flame-retardant heat-resistant polyurethane foaming plastic is prepared by carrying out a reaction on heterocyclic substances, polyester or polyester polyol, polyisocyanate, flame-retardant polyol and the like, or adding the flame retardant instead of the flame-retardant polyol. As the heterocyclic structure is introduced in polyurethane, except for the characteristics of the common polyurethane foaming plastic, the flame-retardant heat-resistant polyurethane foaming plastic further has excellent heat resistance, corrosion resistance and more excellent mechanical property and is high-grade flame-retardant polyurethane foaming plastic; and a preparation process of the flame-retardant heat-resistant polyurethane foaming plastic is environment-friendly and non-toxic. The defects that the existing polyurethane is low in heat resistance, poor in flame retardance and the like are overcome; and the flame-retardant heat-resistant polyurethane foaming plastic can be dried at low temperature, is convenient to use and high in cost performance and can be widely applied to the fields of industrial construction materials, high-grade building materials, heat-preservation and heat-insulation materials and the like.
Description
technical field [0001] The invention relates to a polyurethane foam and belongs to the technical field of polymer materials. Background technique [0002] Polyurethane has excellent wear resistance, temperature resistance, scratch resistance, solvent resistance, radiation resistance, low temperature elasticity, excellent mechanical properties and molecular design, and is widely used in foam plastics, rubber, fibers, coatings, inks, adhesives, leather and other fields. Most polyurethanes are flammable materials. In order to protect people's lives and properties, the development of flame-retardant polyurethanes has become a hot topic in recent years. At present, the purpose of flame retardant is mainly achieved by adding flame retardants, but small molecule flame retardants have disadvantages such as easy migration, unsustainable flame retardant effect, and even damage the physical properties of polyurethane resin itself. In recent years, in the preparation of polyurethane, ...
Claims
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