Method for preparing low-density PVC foam thermal-insulation material by adding coal-base solid waste
A foam insulation material and low-density technology, applied in the field of chemical material preparation, can solve the problems of high temperature resistance, low thermal conductivity, poor compatibility of resin matrix, and inability to use insulation materials, etc., to achieve high specific compression strength, high dispersion, The effect of improving the microscopic morphology
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Embodiment 1
[0041] 1) Mix 0.01mol / L sodium hydroxide aqueous solution and 200 mesh desulfurized gypsum at a mass ratio of 100:10 for 1 hour, filter and dry, and mix the obtained desulfurized gypsum with (3-aminopropyl)trimethoxysilane solution (silane Coupling agent, deionized water and ethanol mass ratio is 1:90:10) according to mass ratio 50:100 mixing treatment for 2 hours, obtain modified desulfurization gypsum after filtering and drying; toluene diisocyanate and modified desulfurization gypsum Mix evenly at a ratio of 1:1, and stir at 20°C for 0.5 hours to obtain a desulfurized gypsum-isocyanate composite intermediate;
[0042] 2) Mix epoxidized soybean oil, diglycidyl tetrahydrophthalate, N,N-diglycidyl p-aminophenol glycidyl ether and polyethersulfone at 100°C in a mass ratio of 5:60:10:1 Evenly, the composite epoxy resin is prepared;
[0043] 3) After premixing 100 parts of PVC, 5 parts of foaming agent, 2 parts of magnesium hydroxide and 1 part of ammonium molybdate, add 50 part...
Embodiment 2
[0046] 1) Mix 1 mol / L potassium hydroxide aqueous solution and 1000 mesh fly ash at a mass ratio of 100:60 for 2 hours, filter and dry, the obtained fly ash and (3-aminopropyl) triethoxysilane aqueous solution (silane coupling agent, deionized water and ethanol mass ratio are 5:90:10) by mass ratio 150:100 mixed treatment 4 hours, filter, obtain modified fly ash after drying; Diphenylmethane diisocyanate and The modified fly ash was mixed evenly at a mass ratio of 15:1, and stirred at 90°C for 2 hours to obtain a fly ash-isocyanate composite intermediate;
[0047] 2) Epoxy peanut oil, 4,5-epoxycyclohexane-1,2-dicarboxylate diglycidyl, tetraglycidylamine type epoxy resin and polyether ether ketone are mixed at 150°C in a mass ratio of 20:80 :30:10 mixed evenly to obtain compound epoxy resin;
[0048] 3) After premixing 100 parts of PVC, 15 parts of foaming agent, 6 parts of aluminum hydroxide and 5 parts of molybdenum oxide, add 300 parts of fly ash-isocyanate composite interm...
Embodiment 3
[0051] 1) Mix 0.02mol / L ammonia solution and 800 mesh desulfurized gypsum at a mass ratio of 100:30 for 2 hours, filter and dry, and the obtained desulfurized gypsum is mixed with N-(β-aminoethyl)-γ-aminopropyltrimethoxy Base silane solution (silane coupling agent, deionized water and ethanol mass ratio is 1:90:10) was mixed according to the mass ratio of 100:100 for 2 hours, filtered and dried to obtain modified desulfurized gypsum; The modified desulfurized gypsum is mixed evenly at a mass ratio of 5:1, and stirred at 70°C for 2 hours to obtain a desulfurized gypsum-isocyanate composite intermediate;
[0052] 2) Mix epoxy castor oil, 3,4-epoxycyclohexyl carboxylate, tetraglycidylamine type epoxy resin and polymethyl methacrylate at 150°C in a mass ratio of 20:80:10:2 Evenly, the composite epoxy resin is prepared;
[0053] 3) After premixing 100 parts of PVC, 10 parts of foaming agent, 3 parts of antimony trioxide and 2 parts of ferrocene, add 180 parts of desulfurized gypsu...
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