Method for preparing polyurethane rigid foam from microwave liquefaction product of bamboo processing residue
A technology for processing residues and polyurethane rigid foam, which is applied in the field of polyurethane rigid foam preparation, can solve problems such as condensation of liquefied products, long liquefaction time, and influence on the application of liquefied products, so as to reduce liquefaction residue rate, reduce liquefaction cost, and shorten liquefaction time Effect
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Embodiment 1
[0032] Add 80g of polyethylene glycol 400, 20g of glycerin, 3g of ethylene carbonate, 2g of 98% sulfuric acid and 25g of bamboo powder into a three-necked bottle, place it in a microwave oven, turn on the condensing reflux device, start the stirrer, and heat it with a microwave power of 800W. 5min, neutralize to pH7-8 with calcium oxide after the reaction. Take 50g of plant polyol, 25g of polyether polyol 4110, 25g of polyether polyol 635, 3g of triethylenediamine, 1g of DMP-30, 1g of water, 2g of silicone oil AK8810, 2g of silicone oil 8850, and 8g of n-pentane, and stir evenly at high speed , add 100g of crude MDI, 2g of nano activated carbon, stir at high speed for 10s, then quickly pour into the mold to solidify and shape. Place it at room temperature for 24 hours and pour it out of the mold to obtain a rigid polyurethane foam. The measured compressive strength of the polyurethane rigid foam is 158.24KPa. The PM2.5 index is 88 at a distance of 0.5 meters from the polyuret...
Embodiment 2
[0034] Add 75g of polyethylene glycol 400, 25g of glycerol, 4g of ethylene carbonate, 3g of 98% sulfuric acid and 34g of bamboo powder into a three-necked bottle, place it in a microwave oven, turn on the condensing reflux device, start the stirrer, microwave power 700W, and heat After 10 minutes, the reaction was neutralized with magnesium oxide. Take 60g vegetable polyol, 20g polyether polyol 4501L, 20g polyether polyol 635, 2g dibutyltin dilaurate, 1.5g DMP-30, 1.5g water, 1.5g silicone oil AK8810, 2g silicone oil 8867, 12g cyclopentyl Add 100g of polymeric MDI and 2g of nano-activated carbon after stirring at a high speed, stir at a high speed for 11s, then quickly pour into a mold to solidify and shape. Place it at room temperature for 24 hours and pour it out of the mold to obtain a rigid polyurethane foam. The measured compressive strength of the polyurethane rigid foam is 182.01KPa. The PM2.5 index is 76 at a distance of 0.5 meters from the polyurethane rigid foam, an...
Embodiment 3
[0036]Add 72g of polyethylene glycol 400, 28g of glycerol, 5g of ethylene carbonate, 4g of 98% sulfuric acid and 28g of bamboo powder into a three-necked bottle, place it in a microwave oven, turn on the condensing reflux device, start the stirrer, microwave power 600W, and heat After 15 minutes, neutralize with calcium oxide after the reaction. Take 70g of plant polyol, 20g of polyether polyol 400, 10g of polyether polyol 635, 1g of N,N‵-dimethylethanolamine, 2g of DMP-30, 2g of water, 3g of silicone oil AK8810, 10g of isopentane, and stir evenly at high speed , add 100g polymeric MDI, 2g nano-activated carbon, stir at high speed for 12s, then quickly pour into the mold to solidify and shape. Place it at room temperature for 24 hours and then pour it out of the mold to obtain a rigid polyurethane foam. The measured compressive strength of the obtained rigid polyurethane foam is 177.23KPa. The PM2.5 index is 88 at a distance of 0.5 meters from the polyurethane rigid foam, and...
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