Polyurethane foam thermal insulation material

A polyurethane foam and insulation material technology, applied in the field of insulation materials, can solve the problems of lack of active hydrogen, foam and shell falling off, vacuum nozzle foam cracking, etc., achieve excellent compressive strength, and avoid the effect of water tank deformation

Inactive Publication Date: 2016-06-22
GUANGXI JISHUN ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vegetable oil is mostly obtained from stable raw materials, so it is a cost-effective polyurethane raw material. The disadvantage is that it lacks the active hydrogen necessary for the reaction with isocyanate, so it needs to be modified.
[0006] During the production process of rigid polyurethane foam, due to various reasons such as its own characteristics, production process and production workers' operating skills, there is a common problem of foam shrinkage, which may easily cause part or all of the foam and the shell to fall off, and eventually cause the shell to deform. The mouth foam cracks, what's more, the hard polyurethane foam between the inner tank and the outer shell cracks horizontally or vertically, which greatly reduces the thermal insulation effect of the water tank

Method used

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  • Polyurethane foam thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First prepare polyether polyol I, the process is as follows:

[0033] (1) Weigh 80 g of lignin, 40 g of water, 5 g of lignin peroxidase, 1 g of catalase, 1 g of furan acetaldehyde and 5 g of furfuryl alcohol in a reactor at a reaction temperature of 80° C., stir and react for 5 hours to obtain Enzymatic hydrolysis of modified lignin;

[0034] (2) Mix 100g of enzymatically hydrolyzed modified lignin, 300g of glycerol, 200g of diethylene glycol and 0.03g of Pd-Fe catalyst in the reactor, control the reaction temperature to 120℃, and bubbling with nitrogen from the bottom of the reactor. , Then vacuumize, add 8 g of propylene oxide, and conduct a sealed reaction under normal pressure for 2 hours to obtain the polyether polyol I with a functionality of 4.6 and a hydroxyl value of 400 mgKOH / g.

[0035] Then prepare polyether polyol II, the process is as follows:

[0036] (1) Weigh 40 g of ethylene glycol and 3 g of magnesium chloride into 200 g of soybean oil, control the reaction ...

Embodiment 2

[0040] First prepare polyether polyol I, the process is as follows:

[0041] (1) Weigh 50g of lignin, 30g of water, 3g of lignin peroxidase, 2g of catalase, 3g of furan acetaldehyde and 10g of furfuryl alcohol in a reactor at a reaction temperature of 80°C, stir and react for 5 hours to obtain Enzymatic hydrolysis of modified lignin;

[0042] (2) Mix 100g of enzymatically hydrolyzed modified lignin, 250g of glycerol, 100g of diethylene glycol and 0.01g of Pd-Fe catalyst in the reactor, control the reaction temperature at 120℃, and bubbling with nitrogen from the bottom of the reactor for reaction , Then evacuated, added 4 g of propylene oxide, and reacted under normal pressure for 2 hours to obtain the polyether polyol I with a functionality of 5.0 and a hydroxyl value of 400 mgKOH / g.

[0043] Then prepare polyether polyol II, the process is as follows:

[0044] (1) Weigh 20 g of ethylene glycol and 1 g of magnesium chloride to 100 g of soybean oil, control the reaction temperature a...

Embodiment 3

[0048] First prepare polyether polyol I, the process is as follows:

[0049] (1) Weigh 100g of lignin, 50g of water, 2g of lignin peroxidase, 3g of catalase, 8g of furan acetaldehyde and 6g of furfuryl alcohol in a reactor at a reaction temperature of 80°C, stir and react for 5 hours to obtain Enzymatic hydrolysis of modified lignin;

[0050] (2) Mix 100g of enzymatically hydrolyzed modified lignin, 350g of glycerol, 250g of diethylene glycol and 0.05g of Pd-Fe catalyst in the reactor, control the reaction temperature to 120℃, and bubbling with nitrogen from the bottom of the reactor for reaction , And then evacuated, add 10 g of propylene oxide, and react under normal pressure for 2 hours to obtain the polyether polyol I with a functionality of 4.7 and a hydroxyl value of 410 mgKOH / g.

[0051] Then prepare polyether polyol II, the process is as follows:

[0052] (1) Weigh 50g of ethylene glycol and 5g of magnesium chloride to 300g of soybean oil, control the reaction temperature at ...

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Abstract

The invention relates to a thermal insulation material and discloses a polyurethane foam thermal insulation material. The thermal insulation material is prepared by mixing and foaming the following raw materials in parts by weight: 70-100 parts of toluene diisocynate, 40-80 parts of polyether polyol I, 10-30 parts of polyether polyol II, 3-6 parts of expanded vermiculite, 5-8 parts of nano silicon dioxide, 10-20 parts of dichlorodifluoromethane, 1-5 parts of catalyst and 1-5 parts of foam stabilizer, wherein the polyether polyol I is lignin polyether polyol; and the polyether polyol II is polyether polyol polymerized by taking modified soybean oil as an initiator and epoxy propane as a polymerization monomer. The thermal insulation material has better compressive strength, tensile strength and impact strength while the phenomena of water tank deformation, bulking, ridging and even cracking are avoided.

Description

Technical field [0001] The invention relates to a thermal insulation material, in particular to a polyurethane foam thermal insulation material. Background technique [0002] With the increasing shortage of energy and the increasing pressure on environmental protection, countries all over the world have begun to vigorously promote the development of renewable energy. Among them, solar energy is the most widely used and developed renewable energy with the best development prospects. It is now widely used in all walks of life. , The solar water heater industry is one of them. my country is rich in solar energy resources and has broad prospects for solar energy utilization. It is currently the world's first user and producer of solar water heaters. [0003] As we all know, for solar water heaters, the choice of water tank insulation materials is very important. At present, the heat insulation materials that can be used as water tanks mainly include polyurethane foam, phenolic foam, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08J9/14C08K7/26C08K3/36
CPCC08G18/4816C08G18/4829C08G18/4891C08J9/144C08J2203/142C08J2375/08C08K3/36C08K7/26C08K2201/011C08G2110/0025
Inventor 蒙献芳
Owner GUANGXI JISHUN ENERGY TECH
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