Organic/inorganic compound flame-retardant rigid polyurethane foam and preparation method thereof

A rigid polyurethane and inorganic technology, applied in the field of thermal insulation materials, can solve the problems of limited large-scale application, low flame retardant efficiency of phosphorus-containing polyols, and high production costs, achieve good industrial production prospects, reduce construction difficulties, and improve resistance. flammable effect

Inactive Publication Date: 2021-03-12
河北君业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with traditional inorganic additive flame retardants and halogen-based flame retardants, phosphorus-containing polyols have lower flame retardant efficiency and higher production costs, which limit their large-scale application in industrial production.

Method used

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  • Organic/inorganic compound flame-retardant rigid polyurethane foam and preparation method thereof
  • Organic/inorganic compound flame-retardant rigid polyurethane foam and preparation method thereof
  • Organic/inorganic compound flame-retardant rigid polyurethane foam and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of the organic / inorganic composite flame-retardant rigid polyurethane foam, comprising the following steps:

[0033] 1) In a three-necked flask equipped with stirring, vacuum system, and thermometer, add DEEP, glycol, and catalyst;

[0034] 2) Slowly raise the temperature of the reaction system to 140-160° C. for transesterification for 3-3.5 hours;

[0035] 3) Ethanol is fractionally distilled off the product in step 2) under normal pressure, then decompressed and gradually heated to 165-180° C., and further esterified and condensed to obtain a phosphorus-containing polyol;

[0036] 4) Mix the prepared component A and component C, put it in the white material tank of the polyurethane foaming machine, and keep it warm at 35-45°C;

[0037] 5) Put component B in the black material tank of the polyurethane foaming machine, inject it into the interlayer of the high-density polyethylene outer protective tube at a pres...

Embodiment 1

[0043] In component A, the phosphorus-containing polyol is a phosphonate-type phosphorus-containing polyol, and its preparation method is as follows:

[0044] 1) Add 166g of DEEP, 70g of ethylene glycol, and 0.25g of dibutyltin oxide into a three-necked flask equipped with stirring, vacuum system, and thermometer;

[0045] 2) slowly raising the temperature of the reaction system to 150° C. for transesterification for 3 hours;

[0046] 3) Distill the ethanol from the product in step 2) under normal pressure, then depressurize and gradually heat up to 165°C for further esterification and condensation to obtain a hydroxyl value of 58mgKOH / g and an acid value of 0.7mgKOH / g at 25°C A phosphorus-containing polyol with a viscosity of 760mPa·S.

Embodiment 2

[0048] An organic / inorganic composite flame-retardant rigid polyurethane foam is composed of the following raw materials in parts by weight:

[0049]

[0050] Mix the prepared component A and MIL-53(Fe), put it in the white material tank of the polyurethane foaming machine, keep it warm at 45°C; then put component B in the black material tank of the polyurethane foaming machine, It is injected into the interlayer of the high-density polyethylene outer protective pipe at a pressure of 0.3Mpa, and foamed to obtain a finished organic / inorganic composite flame-retardant rigid polyurethane foam.

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Abstract

The invention discloses organic/inorganic compound flame-retardant rigid polyurethane foam and a preparation method thereof. The organic/inorganic compound flame-retardant rigid polyurethane foam is composed of a component A, a component B and a component C, wherein the component A is composed of polyether polyol, phosphorus-containing polyol, n-pentane and auxiliaries, the component B is polyisocyanate, and the component C is an organic metal framework material (MOF). The invention also provides a preparation method of the organic/inorganic compound flame-retardant rigid polyurethane foam. The organic/inorganic compound flame-retardant rigid polyurethane foam material can remarkably improve the flame retardance of a pipe, prolong the flame-retardant time, guarantee the quality of the pipeand reduce the construction difficulty, the raw materials are green and environmentally friendly, adverse effects on the environment are avoided, and the organic/inorganic compound flame-retardant rigid polyurethane foam material has good industrial production prospects.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to an organic / inorganic composite flame-retardant rigid polyurethane foam. Background technique [0002] High-density polyethylene outer protection pipe rigid polyurethane foam prefabricated direct buried insulation pipe is the main material commonly used in urban central heating systems. At present, in the construction of comprehensive urban pipe corridors in my country, the materials used for directly buried thermal insulation pipes must meet the B1 flame retardant requirements stipulated in GB8624-2012 "Classification of Combustion Performance of Building Materials and Products" before they can be officially put into use. [0003] Usually, to improve the flame retardancy of rigid polyurethane foam insulation layer, the method of adding flame retardant to rigid polyurethane foam matrix is ​​generally adopted. However, the construction technology of pipes grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/64C08G18/32C08J9/08C08J9/14C08G101/00
CPCC08G18/3206C08G18/3281C08G18/388C08G18/4081C08G18/48C08G18/64C08G18/6688C08J9/08C08J9/141C08J2203/14C08J2375/08
Inventor 潘存业杨智丽李德恒沈毅闫莉王海利王伟
Owner 河北君业科技股份有限公司
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