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Low-acid phenolic resin foam and preparation method thereof

A technology of phenolic resin foam and low acidity, which is applied in the field of phenolic resin foam and its preparation, can solve problems such as no effect data, and achieve the effects of easy operation, reduced corrosion, and simplified operation steps

Inactive Publication Date: 2012-08-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method claims that the acidity of phenolic foam can be reduced by adding sodium tetraborate, it does not give the effect data after reduction

Method used

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  • Low-acid phenolic resin foam and preparation method thereof
  • Low-acid phenolic resin foam and preparation method thereof
  • Low-acid phenolic resin foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put stearic acid and magnesium oxide powder with a mass ratio of 1:1 into a container, heat and stir continuously in a water bath at 80°C until the stearic acid gradually melts and coats the magnesium oxide powder, then cools. Then it is pulverized and sieved to obtain a filler with a particle size of 80 mesh.

[0030] Add 100 parts of expandable phenolic resin, 4 parts of op-10, and 5 parts of 80-mesh magnesium oxide / stearic acid filler synthesized by the aforementioned method into a high-speed mixer at room temperature and mix evenly, then add 4 parts of n-pentane Add and continue stirring to mix evenly, then add 12 parts of concentrated hydrochloric acid and stir rapidly for 1 minute, then pour the mixture into a preheated mold, place it in an environment of 70°C for foaming and curing for 10 minutes.

[0031] Dip a small amount of water with broad pH test paper to test the pH of the foam to 5-6.

Embodiment 2

[0033] Put stearic acid and magnesium oxide powder with a mass ratio of 1:1 into a container, heat and stir continuously in a water bath at 80°C until the stearic acid gradually melts and coats the magnesium oxide powder, then cools. Then it is pulverized and sieved to obtain a filler with a particle size of 160 mesh.

[0034] Add 100 parts of expandable phenolic resin, 2 parts of op-10, and 2.5 parts of 160-mesh magnesium oxide / stearic acid filler synthesized according to the aforementioned method into a high-speed mixer at room temperature and mix evenly, then add 6 parts of cyclopentane Add and continue stirring to mix evenly, then add 12 parts of concentrated hydrochloric acid and stir quickly for 2 minutes, then pour the mixture into a preheated mold, place it in an environment of 80°C for foaming and curing for 20 minutes.

[0035] Dip a small amount of water with broad pH test paper to test the pH of the foam to 5-6.

Embodiment 3

[0037] First add solid paraffin and nano-calcium carbonate powder with a mass ratio of 1:1 into the container, heat and stir continuously in a water bath at 80°C until the solid paraffin is gradually melted and coated on the nano-calcium carbonate powder, and then cooled. Then it is pulverized and sieved to obtain a filler with a particle size of 40 mesh.

[0038]Add 100 parts of expandable phenolic resin, 8 parts of Tween-80, and 6 parts of 40-mesh solid paraffin / calcium carbonate filler synthesized according to the aforementioned method into a high-speed mixer at room temperature and mix evenly, then mix 6 parts of cyclopentane Add and continue stirring to mix evenly, then add 8 parts of concentrated hydrochloric acid and stir rapidly for 1 minute, then pour the mixture into a preheated mold, place it in an oven at 60°C for foaming and curing for 30 minutes.

[0039] Dip a small amount of water with broad pH test paper to test the pH of the foam to 5-6.

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Abstract

The invention discloses a low-acid phenolic resin foam, which is characterized in that the foam is prepared by foaming and curing the following components, by mass: 100 parts of expandable phenolic resin, 2-8 parts of surface active agents, 2-6 parts of fillers, 4-10 parts of foaming agents and 8-15 parts of curing agents. The potential of hydrogen (pH) value of the foam is 4-6. The invention further discloses a preparation method of the low-acid phenolic resin foam. Due to the fact that the low-acid phenolic resin foam contains alkaline powder fillers coated by low-melting-point organic compounds, the coated alkaline powder fillers are released slowly in the curing process of the low-acid phenolic resin foam to perform neutral reaction with acid, thereby greatly reducing acidity in a foam body and then reducing corrosion of the phenolic resin foam on materials contacted with the phenolic resin foam. Additionally, due to the fact that the acidity reduction process and the curing process are performed simultaneously, thereby simplifying operation steps and avoiding problems in the prior art.

Description

technical field [0001] The invention belongs to the technical field of phenolic resin foam and its preparation, and in particular relates to a low-acid phenolic resin foam and a preparation method thereof. Background technique [0002] Existing sound insulation and thermal insulation materials are mainly foam materials such as polyurethane and polystyrene. Their disadvantages are flammability and large smog. Once a fire breaks out, people's lives and property safety will face great threats. And phenolic foam is a kind of heat insulation and flame retardant material with excellent performance. Permeable, no dripping in case of fire, and low price, it is an ideal sound insulation and thermal insulation material for construction, petrochemical and other industries. [0003] The advantages of phenolic resin are outstanding, but the disadvantages are also obvious. One of the big disadvantages is that the curing of phenolic foam is carried out under acidic conditions, so that aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08K9/10C08K9/04C08K3/22C08K3/26C08J9/14
Inventor 李瑞海李涛荆帅林肖慧胡祥胡静
Owner SICHUAN UNIV
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