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

Inactive Publication Date: 2016-03-02
RES INST OF SUBTROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquefaction time of the above method is too long, which will easily lead to the condensation of the liquefied product to form new residues, which will affect the application of the liquefied product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a method for preparing rigid polyurethane foam by utilizing microwave liquefaction products of bamboo processing residues, which is characterized in that: polyethylene glycol 400, glycerol and ethylene carbonate mixed liquefaction agent, 98% sulfuric acid and dried and pulverized bamboo The processing residue is put into a three-neck bottle, and placed in a microwave liquefaction reactor with functions of condensation, stirring, and infrared temperature measurement for microwave heating. After the reaction is completed, neutralization reagents are added to neutralize the liquefied product to pH 7-8 , to obtain plant polyols. Then, mix and stir the plant polyol prepared above with polyether polyol, catalyst, curing agent, water, silicone oil, and foaming agent evenly, then add MDI, nano-activated carbon or titanium dioxide, mix and stir for 10s-15s, and put it into the mold. Stand at room temperature for foaming, curing, and demoulding to obtain rigid polyurethane foam. The invention makes full use of bamboo resources, reduces the cost of liquefaction, the liquefaction product can be used in all components, and realizes the goal of converting all components of bamboo processing residues into synthetic polyurethane raw materials. The product has the characteristic of being able to absorb PM2.5, and is a An environmentally friendly bio-based polyurethane rigid foam product.

Description

technical field [0001] The invention relates to a method for preparing polyurethane rigid foam from a microwave liquefied product of bamboo processing residue. Background technique [0002] Polyurethane rigid foam, as a synthetic polymer material with excellent performance, has been widely used in the fields of construction, electrical appliances, packaging, transportation and medicine, and has developed rapidly in recent years. Rigid polyurethane foam is a polymer with repeating structural units of urethane chain segment, which is made by polycondensation reaction of isocyanate and polyether or polyester polyol. At present, the raw materials for the production of polyether and polyester polyols are all derived from petrochemical products. The extensive use of these petrochemical resources has caused increasingly serious environmental problems, such as global warming, damage to the ozone layer, destruction of the carbon balance of the ecosystem, and the release of Hazardous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/64C08K3/04C08K3/22C08G101/00
CPCC08G18/6492C08G18/6685C08K3/04C08K3/22C08K2003/2241C08K2201/011C08G2110/0025
Inventor 张金萍杜孟浩胡立松
Owner RES INST OF SUBTROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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