Polyurethane heat preservation material

A thermal insulation material and polyurethane technology, applied in the field of thermal insulation materials, can solve the problems of vacuum nozzle foam cracking, reducing the thermal insulation effect of the water tank, falling off the foam and the shell, etc., to achieve the effect of increasing strength, reducing its own characteristics, and reducing material compression.

Inactive Publication Date: 2016-04-20
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 wor

Method used

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  • Polyurethane heat preservation material

Examples

Experimental program
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Effect test

Example Embodiment

[0032] Example 1

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

[0034] (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 into a reactor, the reaction temperature is 80°C, and the reaction is stirred for 5 hours to obtain Enzymatic hydrolysis of modified lignin;

[0035] (2) 100 g of enzymatically modified lignin, 300 g of glycerol, 200 g of diethylene glycol and 0.03 g of Pd-Fe catalyst were mixed in the reactor, and the reaction temperature was controlled to 120 °C, and the reaction was carried out through nitrogen bubbling at the bottom of the reactor. , then evacuated, added 8 g of propylene oxide, and reacted in a closed atmosphere at 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] To prepare polyether polyol II, the process is as follows:

[0037] (1) Weigh 40 g of ethyl...

Example Embodiment

[0040] Example 2

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

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

[0043] (2) Mix 100 g of enzymatically modified lignin, 250 g of glycerol, 100 g of diethylene glycol and 0.01 g of Pd-Fe catalyst in the reactor, control the reaction temperature to 120 °C, and pass nitrogen through the bottom of the reactor to bubble the reaction , then evacuated, 4 g of propylene oxide was added, and the reaction was carried out 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] To prepare polyether polyol II, the process is as follows:

[0045] (1) Weigh 20 g of ethylene glycol and 1 g of m...

Example Embodiment

[0048] Example 3

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

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

[0051] (2) Mix 100 g of enzymatically modified lignin, 350 g of glycerol, 250 g of diethylene glycol and 0.05 g of Pd-Fe catalyst in the reactor, control the reaction temperature to 120 °C, and pass nitrogen through the bottom of the reactor to bubble the reaction , then evacuated, added 10 g of propylene oxide, and reacted 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] To prepare polyether polyol II, the process is as follows:

[0053] (1) Weigh 50 g of ethylene glycol and 5 g of magnesium chloride into 30...

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Abstract

The invention relates to a heat preservation material, and discloses a polyurethane heat preservation material. The heat preservation material is prepared by mixing and foaming the following raw materials in parts by weight: 70 to 100 parts of 1, 6-hexamethylene diisocyanate, 40 to 80 parts of polyether glycol I, 10 to 30 parts of polyether glycol II, 3 to 6 parts of expanded vermiculite, 5 to 8 parts of nanosilicon dioxide, 10 to 20 parts of a foaming agent, 1 to 5 parts of dihydroxyethyl amine monoisopropanolamine and 1 to 5 parts of a foam stabilizer, wherein the polyether glycol I is lignin polyether glycol; the polyether glycol II is polyether glycol polymerized by modified sunflower seed oil serving as a starting agent and epoxypropane serving as a polymeric monomer. The heat preservation material is higher in compressive strength, tensile strength and impact strength, and meanwhile, phenomena of deformation, bulging, ridging and even cracking of a water tank are avoided.

Description

technical field [0001] The invention relates to thermal insulation materials, in particular to a polyurethane 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 foam, and ...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08K7/26C08K3/36C08J9/14
CPCC08G18/4816C08G18/4829C08G18/4891C08J9/144C08J2203/142C08J2375/08C08K3/36C08K7/26C08K2201/003C08K2201/011C08G2110/0025
Inventor 陆俊行黄振伟梁文吴丽娟吴丽芬韦冠川
Owner GUANGXI JISHUN ENERGY TECH
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