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Polyurethane hard foam thermal-insulation material

A thermal insulation material and hard foam technology, which is applied in the field of polyurethane rigid foam thermal insulation materials, can solve the problems of foam cracking at the vacuum nozzle, lowering the thermal insulation effect of the water tank, and the peeling off of the foam and the shell, so as to increase the strength, reduce its own characteristics, and reduce material compression. Effect

Inactive Publication Date: 2016-05-04
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 hard foam thermal-insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First prepare polyether polyol I, the process is as follows:

[0034] (1) Weigh 80g of lignin, 40g of water, 5g of lignin peroxidase, 1g of catalase, 1g of furfural acetaldehyde and 5g of furfuryl alcohol in a reactor, the reaction temperature is 80°C, and the reaction is stirred for 5 hours to obtain Enzymatic modification of lignin;

[0035] (2) Mix 100g of enzymatically modified lignin, 300g of glycerol, 200g of diethylene glycol and 0.03g of Pd-Fe catalyst in the reactor, control the reaction temperature at 120°C, and bubble the reaction with nitrogen from the bottom of the reactor , and then vacuumized, 8 g of propylene oxide was added, and the reaction was sealed 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.

[0036]Then prepare polyether polyol II, the process is as follows:

[0037] (1) Weigh 40g of ethylene glycol and 3g of magnesium chloride into 200g of soybean oil, contro...

Embodiment 2

[0041] First prepare polyether polyol I, the process is as follows:

[0042] (1) Weigh 50g of lignin, 30g of water, 3g of lignin peroxidase, 2g of catalase, 3g of furfural acetaldehyde and 10g of furfuryl alcohol in a reactor, the reaction temperature is 80°C, and the reaction is stirred for 5 hours to obtain Enzymatic modification of lignin;

[0043] (2) Mix 100g of enzymatically 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°C, and bubble the reaction with nitrogen from the bottom of the reactor , and then vacuumized, adding 4 g of propylene oxide, and reacting 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.

[0044] Then prepare polyether polyol II, the process is as follows:

[0045] (1) Weigh 20g of ethylene glycol and 1g of magnesium chloride into 100g of soybean oil, control the reaction t...

Embodiment 3

[0049] First prepare polyether polyol I, the process is as follows:

[0050] (1) Weigh 100g of lignin, 50g of water, 2g of lignin peroxidase, 3g of catalase, 8g of furfural acetaldehyde and 6g of furfuryl alcohol in a reactor, the reaction temperature is 80°C, and the reaction is stirred for 5 hours to obtain Enzymatic modification of lignin;

[0051] (2) Mix 100g of enzymatically modified lignin, 350g of glycerol, 250g of diethylene glycol and 0.05g of Pd-Fe catalyst in the reactor, control the reaction temperature at 120°C, and bubble the reaction with nitrogen from the bottom of the reactor , and then vacuumized, 10 g of propylene oxide was added, and the reaction was sealed 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.

[0052] Then prepare polyether polyol II, the process is as follows:

[0053] (1) Weigh 50g of ethylene glycol and 5g of magnesium chloride into 300g of soybean oil, con...

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Abstract

The invention relates to a thermal-insulation material, and discloses a polyurethane hard 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 dimer acid diisocyanate, 40-80 parts of polyether glycol I, 10-30 parts of polyether glycol II, 3-6 parts of expanded vermiculite, 5-8 parts of nano silicon dioxide, 10-20 parts of monofluorodichlorohexane, 1-5 parts of catalyst and 1-5 parts of foam stabilizer. The polyether glycol I is lignin polyether glycol, and the polyether glycol II is polyether glycol formed by carrying out polymerization on a polymerizable monomer epoxypropane by using modified soybean oil as an initiator. The thermal-insulation material has higher compression strength, tensile strength and impact strength, and avoids the phenomena of deformation, bulging, edging and even cracking of the water tank.

Description

technical field [0001] The invention relates to thermal insulation materials, in particular to a rigid polyurethane foam thermal insulation material. Background technique [0002] With the increasing shortage of energy and the increasing pressure on environmental protection, countries around the world have begun to promote the development of renewable energy, among which solar energy is the most widely used and developed renewable energy with the best development prospects, and has been widely used in various industries , the solar water heater industry is one of them. Our country is rich in solar energy resources and has broad prospects for solar energy utilization. At present, it is the first user and producer of solar water heaters in the world. [0003] As we all know, for solar water heaters, the selection of water tank insulation materials is very important. At present, the insulation materials that can be used as water tanks mainly include polyurethane foam, phenolic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G65/34C08G65/26C08K13/02C08K3/34C08K3/36C08K7/10C08K5/02C08K5/17C08K5/5419
CPCC08G18/4816C08G18/4829C08G65/2606C08G65/34C08K3/34C08K3/36C08K5/02C08K5/17C08K5/5419C08K7/10C08K13/02C08G2110/0025
Inventor 马昭键李正良吴丽娟吴丽芬
Owner GUANGXI JISHUN ENERGY TECH
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