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Method for preparing polyurethane foamed plastic from economic forest processing residues

A technology for processing residues and biomass polyurethane, applied in the field of forestry chemical industry, can solve the problems of high energy consumption and long time of liquefaction products, achieve high liquefaction rate, mild reaction conditions, and reduce production costs

Inactive Publication Date: 2015-04-29
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

However, the existing problem is that the current preparation of liquefied products consumes a lot of energy and takes a long time, and the liquefied products are only suitable for preparing polyurethane rigid or semi-rigid foams.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The ethylene glycol of 300kg, 9kg sulfuric acid are added 1 ton of reaction kettle, start stirring device, stop stirring after ethylene glycol and sulfuric acid mix uniformly, add 75kg economical forest processing residue, close reaction kettle feeding port, start stirring (rotating speed 600r / min ), condensing and heating devices, when heated to 140°C, keep warm for 90min, stop heating, naturally cool down to 40°C, add 4kg of magnesium oxide to neutralize to pH7-8. Then raise the temperature to 120°C, add 60kg of phthalic anhydride and 10kg of dimethylformamide, keep it warm for 30 minutes, then raise the temperature to 150°C, reflux and stir for 1 hour, and terminate the reaction to obtain a modified liquefied product with a hydroxyl value of 54mgKOH / g.

[0019] The modified liquefied product is in proportion (25 parts by mass of liquefied product, 40 parts by mass of polyether polyol, 2 parts by mass of water, 30 parts by mass of isocyanate, liquid CO 2 2 parts by m...

Embodiment 2

[0021] Add 350kg of the mixture of polyethylene glycol 400 and glycerol, 10.5kg of phosphoric acid into a 1 ton reactor, start the stirring device, stop stirring after the polyethylene glycol 400, glycerin and sulfuric acid are mixed evenly, add 90kg of economical forest processing remaining Close the feeding port of the reaction kettle, start the stirring (speed 600r / min), condensation, heating device, when heated to 140°C, keep warm for 60min, stop heating, naturally cool down to 40°C, add 10kg of calcium oxide to neutralize to pH7-8 . Then raise the temperature to 120°C, add 70kg of toluic anhydride and 12kg of dimethylformamide, keep it warm for 40min, then raise the temperature to 150°C, reflux and stir for 1h, and terminate the reaction to obtain a modified liquefied product with a hydroxyl value of 53mgKOH / g.

[0022] The modified liquefied product in proportion (35 parts by mass of liquefied product, 30 parts by mass of polyether polyol, 33 parts by mass of isocyanate,...

Embodiment 3

[0024]The mixture of polyethylene glycol 600 and ethylene carbonate of 400kg, 12kg formic acid are added into 1 ton of reactor, start stirring device, stop stirring after above-mentioned mixture is stirred, add 103kg economical forest processing residue, close reactor feeding port, start Stirring (speed 600r / min), condensation, heating device, when heated to 145°C, keep warm for 90min, stop heating, naturally cool down to 40°C, add 6kg magnesium oxide to neutralize to pH7-8. Then raise the temperature to 125°C, add 70kg of acetic anhydride, keep it warm for 30min, then raise the temperature to 155°C, reflux and stir for 1.5h, terminate the reaction, and obtain a modified liquefied product with a hydroxyl value of 55mgKOH / g.

[0025] The modified liquefied product is in proportion (45 parts by mass of liquefied product, 20 parts by mass of polyether polyol, 35 parts by mass of isocyanate, 2 parts by mass of water, liquid CO 2 2.5 parts by mass, 1.5 parts by mass of silicone oi...

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Abstract

The invention discloses a method for preparing degradable biomass polyurethane foamed plastic from economic forest processing residues, belonging to the technical field of chemical industry of forest products. The method mainly comprises the following steps: uniformly mixing a liquefier and a catalyst in a 1-ton reaction kettle, adding economic forest processing residues, closing the reaction kettle feed port, starting a stirrer and a condensing unit, heating to 140-150 DEG C, liquefying for 60-90 minutes, naturally cooling to 40 DEG C, and adding oxide for neutralization until the pH value is 7-8; heating to 120-130 DEG C, adding a modifier, keeping the temperature for 30-60 minutes, heating to 150-160 DEG C, stirring under reflux for 1-2 hours, and terminating the reaction; cooling to room temperature to obtain the modified liquefying product; and mixing the liquefying product, polyether glycol, water, liquid CO2, silicon oil, an amine catalyst, a tin catalyst and a flame retardant under high pressure, sending into a V-shaped expansion chamber for expansion, and curing by heating to obtain the degradable biomass polyurethane foamed plastic. The method can obviously lower the production cost of the polyurethane foamed plastic and endow the polyurethane foamed plastic with biodegradability; and the detection shows that the polyurethane foamed plastic conforms to the national standard GB / T10802-2006.

Description

technical field [0001] The invention belongs to the technical field of forest products chemical industry, and in particular relates to a production method for preparing biomass polyurethane foam by utilizing the liquefaction and modification products of economic forest processing residues Background technique [0002] Due to its porous honeycomb structure, polyurethane foam has excellent softness, elasticity, water absorption and water resistance, and is widely used in industries such as sofas, mattresses, flexible packaging and car seat cushions. China has a large population, and the development of industries such as furniture, clothing, and automobiles has driven the rapid development and demand growth of the polyurethane foam industry. The demand for polyether polyols in my country is growing at a rate of about 10-15% per year, 55% of which comes from polyurethane foam. With the increasing shortage of petrochemical resources and rising oil prices, the price of polyether ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/64C08G18/61C08K5/521C08K5/3492C08K5/524C08K3/22C08K3/32C08K3/38C08G101/00
CPCC08G18/4081C08G18/48C08G18/6492C08J9/122C08J2375/08C08K5/34924C08K5/521C08K5/524
Inventor 张金萍杜孟浩胡立松
Owner RES INST OF SUBTROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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