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Hard polyurethane foam plastic

A technology of rigid polyurethane and foam plastics, which is applied in the field of rigid polyurethane foam plastics, can solve problems such as application limitations, and achieve the effects of good environmental performance, large adjustable range, and good compressive strength

Inactive Publication Date: 2007-08-15
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

China's invention patent application No. 200510094781.6 once disclosed a formula for producing rigid polyurethane foam using a third-generation foaming agent. It uses HFC-245fa as a foaming agent. Although it meets environmental protection requirements, the foaming agent has a relatively low The boiling point and higher vapor pressure limit the application of replacing HCFC-141b in existing pipe insulation rigid foam production equipment and processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Rigid polyurethane foam was manufactured according to the following formulation:

[0034] Composition and weight of each raw material in component A:

[0035] 100 grams of compound polyether prepared by compounding 40 grams of low-functionality polyether polyol and 60 grams of high-functionality polyether polyol; 0.6 grams of small molecule hydroxyl compound; 1.5 grams of tertiary amine catalyst; 0.5 grams of potassium oleate; -C bond type foam stabilizer 1.8 grams; 1.0 grams of distilled water; HCFC-141b (molecular formula CH 3 CFCl 2 ) 8.0 grams of foaming agent; the total weight of component A is 113.4 grams.

[0036] First mix component A in a container evenly, then add component B polymethylene polyphenyl polyisocyanate into component A according to a predetermined ratio, stir with a mixer at a speed of 3000r / min for 10s, and finally mix the mixture Pour it into the mold, the mixture reacts quickly, and after foaming and curing, a rigid polyurethane f...

Embodiment 2

[0039] Example 2: Rigid polyurethane foam was manufactured according to the following formulation:

[0040] Composition and weight of each raw material in component A:

[0041] 100 grams of compound polyethers prepared by compounding 40 grams of low-functionality polyether polyols and 60 grams of high-functionality polyether polyols; 0.4 grams of small molecule hydroxyl compounds; 4.0 grams of tertiary amine catalysts; 2.6 grams of potassium oleate; - 1.8 grams of C bond type foam stabilizer; 1.0 grams of distilled water; 9.0 grams of HFC-365 / 227 blowing agent; the total weight of component A is 118.8 grams.

[0042] First mix component A in a container evenly, then add component B polymethylene polyphenyl polyisocyanate into component A according to a predetermined ratio, stir with a mixer at a speed of 3000r / min for 10s, and finally mix the mixture Pour it into the mold, the mixture reacts quickly, and after foaming and curing, a rigid polyurethane foam is obtained, wherein...

Embodiment 3

[0045] Example 3: Rigid polyurethane foam was manufactured according to the following formulation:

[0046] Composition and weight of each raw material in component A:

[0047] 100 grams of compound polyether prepared by compounding 45 grams of low-functionality polyether polyol and 55 grams of high-functionality polyether polyol; 0.8 grams of small molecule hydroxyl compound; 1.8 grams of tertiary amine catalyst; 0.2 grams of potassium oleate; - 1.6 grams of C bond type foam stabilizer; 1.2 grams of distilled water; 7.0 grams of HFC-365 / 227 blowing agent; the total weight of component A is 112.6 grams.

[0048] First mix component A in a container evenly, then add component B polymethylene polyphenyl polyisocyanate into component A according to a predetermined ratio, stir with a mixer at a speed of 3000r / min for 10s, and finally mix the mixture Pour it into the mold, the mixture reacts quickly, and after foaming and curing, a rigid polyurethane foam is obtained. The ratio of...

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PUM

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Abstract

The invention discloses a hard polyurethane foam plastic, which is characterized by the following: adopting complex polyether, catalyst, foamer, distill water and foamer as raw material A; using polymethylene polyphenyl polyisocyanates as raw material B; blending micromolecular hydroxy compound, tertiary amine catalyst and potassium oleate as catalyst; blending each component of raw material A evenly with component B; pouring the mass into mould; foaming; solidifying; obtaining the product with little toxicity and good environment-protective property.

Description

technical field [0001] The invention relates to a rigid polyurethane foam, in particular to a rigid polyurethane foam which is especially suitable for pipe insulation. Background technique [0002] Rigid polyurethane foam is the most important thermal insulation material. It is widely used in automobiles and ships, oil pipelines, refrigerator cold storage, civil buildings, urban heating, aerospace and military industries, etc., as thermal insulation materials and structural materials. CFC-11 (molecular formula CCl 3 F) is a typical representative of the first generation blowing agent, which is widely used in the polyurethane foam industry. However, CFC (chlorofluorocarbon) blowing agents have a great effect on the destruction of the ozone layer. According to the "Montreal Protocol", developed countries will completely ban them before 1996, and the deadline for China to phase out CFCs is July 2007. HCFC-141b (molecular formula CH 3 CFCl 2 ) is the most mature blowing agen...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/76C08G18/18B29C67/24C08G101/00
Inventor 朱明胡文峰廖乾邑朱永飞魏玉君
Owner SICHUAN NORMAL UNIVERSITY
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