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Method for preparing high temperature resistance phenolic aldehyde foam insulating composite material

A technology of composite thermal insulation material and phenolic foam, which is applied in the field of preparation of high temperature-resistant phenolic foam composite thermal insulation material, can solve problems that have not been reported in literature, and achieve the effects of improving high temperature resistance, increasing heat resistance level, and high thermal insulation effect

Inactive Publication Date: 2009-09-16
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of phenolic foam composite insulation material with high temperature resistance up to 250 °C has not been reported in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 59g of paraformaldehyde and 95g of phenol into a 250ml three-neck flask, add 30g of 6% NaOH solution, and ensure the pH of the system is 8-9; while stirring, heat in a water bath and slowly raise the temperature; when the temperature rises to 65°C , remove the heating device, heat preservation reaction for 1.5h; add 24g of boric acid, heat up to 95°C, heat preservation reaction for 1.0h, stop the reaction, cool to room temperature; Thick boron phenolic resin.

[0043] Add 45g of boron phenolic resin, 2.5g of Tween-80, 23g of aluminum hydroxide, 5g of pentane, and 5g of p-toluenesulfonic acid into the mixing pot in turn, stir at high speed for 15s, and quickly pour it into a mold covered with 5mm thick glass fiber felt , close the mold, foam and solidify at 75°C for 1 hour, cool, and demould to obtain a high-temperature-resistant phenolic foam composite insulation material with a certain density.

[0044] The product of embodiment 1 is tested by the national standar...

Embodiment 2

[0054]Add 38g of paraformaldehyde and 95g of phenol into a 250ml three-necked flask, and add 25g of 6% NaOH solution to ensure that the pH of the system is 8-9; while stirring, heat in a water bath and slowly raise the temperature; when the temperature rises to 80°C , remove the heating device, and keep warm for 1.0h; add 20g of anhydrous borax, heat up to 105°C, keep warm for 1.5h, stop the reaction, and cool to room temperature; dropwise add phosphoric acid to neutralize the system, and control the pH of the system to 6-7 to obtain Viscous yellow boron phenolic resin.

[0055] Add 45g of boron phenolic resin, 3.5g of Tween-80, 36g of aluminum hydroxide, 9g of pentane, and 9g of p-toluenesulfonic acid into the mixing pot in turn, stir at high speed for 15s, and quickly pour it into a mold covered with 15mm thick ceramic fiber felt , close the mold, foam and solidify at 40°C for 1 hour, cool, and demould to obtain a high-temperature-resistant phenolic foam composite insulation...

example 3

[0057] Put 50g of paraformaldehyde and 95g of phenol into a 250ml three-necked flask, and add 30g of 6% NaOH solution to ensure that the pH of the system is 8-9; while stirring, heat in a water bath and slowly raise the temperature; when the temperature rises to 75°C , remove the heating device, keep warm for 2 hours; add 15g of diboron trioxide, heat up to 90°C, keep warm for 2.0h, stop the reaction, and cool to room temperature; dropwise add phosphoric acid to neutralize the system, control the pH of the system to 6-7, and get Viscous yellow boron phenolic resin.

[0058] Add 45g of boron phenolic resin, 2g of Tween-80, 4.5g of aluminum hydroxide, 3g of pentane, and 4g of p-toluenesulfonic acid into the mixing pot in turn, stir at high speed for 15s, and quickly pour into a mold covered with 40mm thick rock wool fiber felt During the process, close the mold, foam and solidify at 90°C for 1 hour, cool, and demould to obtain a high-temperature-resistant phenolic foam composite...

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PUM

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Abstract

The invention discloses a method for preparing high temperature resistance phenolic aldehyde foam insulating composite material. The method comprises that: first step, phenolic aldehyde resin is subjected to boron modification to obtain boron phenolic resin, as bond energy of a B-O bond in the boron phenolic resin is higher than that of a C-C bond, which contributes to improvement of high temperature resistance; second step, an inorganic insulating material such as glass fiber, mineral cotton, mineral wool, ceramic fiber, expanded perlite and the like with thickness of between 1 and 50mm is used as lining, the boron phenolic resin is poured on the lining to perform foaming solidification, temperature classification of the composite material can be improved through composition of an organic material and an inorganic material, and higher insulating effect of the material can be maintained. The phenolic aldehyde foam insulating composite material has both the excellent insulation performance of the organic insulating material and the high temperature resistance of the inorganic insulating material, has light weight and flame resistance, and can be widely applied to cold and hot insulating places.

Description

technical field [0001] The invention relates to a method for modifying phenolic resin, and more specifically relates to a method for preparing a high-temperature-resistant phenolic foam composite thermal insulation material. Background technique [0002] Phenolic resin has outstanding flame retardancy, low smoke, low toxicity, and energy-saving and thermal insulation properties. Since the 1990s, phenolic composite materials have been widely used in aerospace, national defense and military industries, and fire prevention in civil aircraft, ships, stations, and oil wells. places with strict requirements. Known phenolic foam preparation method is to combine resole phenolic resin, surfactant (such as Tween-80), filler (such as aluminum hydroxide), blowing agent (such as pentane), curing agent (such as various mineral acids or organic acid) after mixing, high-speed stirring, pouring into the mold, and finally curing at 60-100°C for 30-120 minutes to obtain the product. [0003]...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08L61/14C08G8/28C08G8/10
Inventor 王尧禹卞沈慧陈宇黄剑清
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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