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Low-temperature low-conductivity polyurethane foam, raw material composition, combined polyether and preparation method thereof

A technology of combining polyether and raw materials, which is applied in the field of polyurethane, can solve the problems of poor thermal insulation effect, high thermal conductivity of all-water foaming agent, environmental damage, etc., and achieve the effects of low GWP value, saving dosage, and high dimensional stability

Active Publication Date: 2014-03-26
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects that the existing rigid polyurethane foam mostly uses CFC series foaming agents, which cause damage to the environment, and the full water foaming agent has high thermal conductivity and poor heat preservation effect, and provides a A kind of low-temperature low-conductivity polyurethane foam, raw material composition, combined polyether and preparation method

Method used

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  • Low-temperature low-conductivity polyurethane foam, raw material composition, combined polyether and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of combined polyether:

[0049] 30 parts of polyether polyol 6207, 40 parts of polyether polyol 8307, 20 parts of polyether polyol DV125, 10 parts of polyester polyol PS3152, 2.0 parts of surfactant B8532, 0.6 parts of N,N-dimethylcyclohexyl Amine, 0.5 parts of catalyst TMR-2, 1.0 parts of N,N-dimethylbenzylamine, 1.8 parts of deionized water and 25 parts of HFC-245fa.

[0050] Put various raw materials into a closed container according to the above formula, and stir for 20 minutes under the condition of a rotation speed of 500 rpm at room temperature to prepare a composite polyether.

[0051] (2) Preparation of low-temperature low-conductivity polyurethane foam:

[0052] Pour the combined polyether and isocyanate 44V20 in Example 1 into a container at a mass ratio of 1:1, and stir electrically at a speed of 3000rpm for 8 seconds, and pour the evenly mixed liquid into a mold with a constant temperature of 50°C. Close the mold and ripen for 0.5 hour to ...

Embodiment 2

[0054] (1) Preparation of combined polyether:

[0055] 50 parts of polyether polyol SA460, 20 parts of polyether polyol 8307, 15 parts of polyether polyol 303, 15 parts of polyester polyol PS3152, 2.5 parts of surfactant L-6860, 0.3 parts of catalyst DABCOBX405, 0.2 parts of catalyst TMR -2. 1.5 parts of N,N-dimethylbenzylamine, 2.5 parts of deionized water and 10 parts of HFC-245fa.

[0056] Put various raw materials into a closed container according to the above formula, and stir for 20 minutes under the condition of a rotation speed of 500 rpm at room temperature to prepare a composite polyether.

[0057] (2) Preparation of low-temperature low-conductivity polyurethane foam:

[0058] Pour the combined polyether and isocyanate 44V20 in Example 2 into the container according to the mass ratio of 1:1.1, stir it electrically at a speed of 3000rpm for 8 seconds, and pour the evenly mixed liquid into a mold with a constant temperature of 40°C. Close the mold and ripen for 0.5 h...

Embodiment 3

[0060] (1) Preparation of combined polyether:

[0061] 45 parts of polyether polyol 6207, 35 parts of polyether polyol 8307, 15 parts of polyether polyol DV125, 5 parts of polyester polyol PS3152, 3.0 parts of surfactant B8532, 0.7 parts of N,N-dimethylcyclohexyl Amine, 0.4 parts of catalyst TMR-2, 1.2 parts of N,N-dimethylbenzylamine, 1.5 parts of deionized water and 30 parts of HFC-245fa.

[0062] Put various raw materials into a closed container according to the above formula, and stir for 20 minutes under the condition of a rotation speed of 500 rpm at room temperature to prepare a composite polyether.

[0063] (2) Preparation of low-temperature low-conductivity polyurethane foam:

[0064] Pour the combined polyether and isocyanate PM200 in Example 3 into a container at a mass ratio of 1:1.2, and stir it electrically at a speed of 3000rpm for 8 seconds, and pour the evenly mixed liquid into a mold with a constant temperature of 45°C. Close the mold and ripen for 0.5 hour...

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Abstract

The invention discloses low-temperature low-conductivity polyurethane foam, a raw material composition, combined polyether and a preparation method thereof. The combined polyether comprises the following components in parts by weight: 30-50 parts of sorbitol-based polyether polyol, 20-40 parts of sucrose-based polyether polyol, 10-20 parts of glyceryl polyether polyol, 5-15 parts of phthalic anhydride polyester polyol, 2.0-3.0 parts of a surfactant, 1.5-2.5 parts of a chemical foamer, 0.3-0.7 part of a catalyst A, 0.2-0.5 part of a catalyst B, 0.8-1.5 part of a catalyst C, and 10-30 parts of 1, 1, 1, 3, 3-perfluoropropane. The total weight of polyether polyol and polyester polyol is 100 parts. The catalysts A, B and C are independently amine catalysts or metal catalysts, respectively, and are different from each other. The polyurethane foam is excellent in performance, strong in low temperature resistance, good in dimensional stability, low in heat conductive coefficient and wide in application range.

Description

technical field [0001] The invention belongs to the field of polyurethane, and in particular relates to a low-temperature low-conductivity polyurethane foam, a raw material composition, a combined polyether and a preparation method. Background technique [0002] As one of the best thermal insulation materials at present, polyurethane foam has many applications in pipeline insulation, building insulation, and daily necessities. Polyurethane insulation pipes are light in material, low in thermal conductivity, high in tensile and compressive strength, convenient in construction, resistant to heat and humidity, good in aging resistance, and low in water absorption. Therefore, compared with other insulation materials in petrochemical and steam transportation, they are There are greater advantages. In the scope of pipeline insulation applications, the underground environment temperature is relatively low, generally below zero, and polyurethane foam is prone to shrinkage, which se...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08J9/14C08J9/08C08G101/00
CPCC08G18/4018C08G18/4208C08G18/4816C08G18/4883C08G2101/00C08J9/146C08J2203/142C08J2375/06C08J2375/08
Inventor 于楠许风华倪军刘延良
Owner SHANGHAI DONGDA POLYURETHANE
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