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Preparation method of expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material

A technology of polyurethane resin and expanded graphite, which is applied in the field of preparation of expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite materials, which can solve the problems of poor strength, elasticity and toughness, and achieve excellent mechanical properties, enhanced wettability, and enhanced sealing performance effect

Inactive Publication Date: 2019-07-12
HEILONGJIANG HEIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the pressure-resistant sealing material containing expanded graphite exhibits poor strength, elasticity and toughness under compression in the prior art

Method used

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  • Preparation method of expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material
  • Preparation method of expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material
  • Preparation method of expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material

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specific Embodiment approach 1

[0037] Specific embodiment 1: The method for preparing the expanded graphite-epoxy-polyurethane resin pressure-resistant composite material described in this embodiment includes the following specific operations:

[0038] Step 1: Prepare expanded graphite and perform surface modification treatment on the prepared expanded graphite;

[0039] Step 1: Take 80-120ml of glacial acetic acid and add 400-600ml of perchloric acid to prepare glacial acetic acid-perchloric acid mixed solution I;

[0040] Step 1: Take 8-10g of 100-mesh flake graphite into a three-necked bottle, add 20-40ml of glacial acetic acid-perchloric acid mixed solution I, stir in an ice water bath for 10-30 minutes and mix evenly to obtain glacial acetic acid-perchloric acid mixed solution II;

[0041] Step 1: Add 1-5g of potassium permanganate to glacial acetic acid-perchloric acid mixed solution II in N times in equal amounts. After all potassium permanganate is added to glacial acetic acid-perchloric acid mixed solution ...

specific Embodiment approach 2

[0056] Specific implementation manner 2: In step one and three of this embodiment, 1-5g potassium permanganate is added to glacial acetic acid-perchloric acid mixed solution II in equal amounts in N times, and the value of N is in the range of 8-12 Times. Other undisclosed technologies and steps are the same as the first embodiment.

[0057] This setting is mainly because adding potassium permanganate all at once will cause the system temperature to rise suddenly and cause an explosion, so it is added several times. Adding a small amount of potassium permanganate each time will slightly increase the temperature of the reaction system. After the temperature of the system decreases, add the next potassium permanganate. Generally, it is divided into about 10 times with an interval of 1-2 minutes. It will be strictly quantified, but generally for the safety of operation and the balance of reaction efficiency, the amount of addition is basically the same each time.

specific Embodiment approach 3

[0058] Specific embodiment 3: The watch glass I in the step 14 in this embodiment is a glass watch glass. Other undisclosed technologies and steps are the same as the first embodiment.

[0059] In this setting, use glass watch glasses and try not to use metal containers, because perchloric acid during the reaction may cause metal corrosion to contaminate the sample, which will eventually affect the material parameters and performance after the experiment.

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Abstract

The invention discloses a preparation method of an expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material, belongs to the field of manufacture of pressure-resistant sealing materials, and aims to solve the problem in the prior art that a pressure-resistant sealing material containing expanded graphite has poor strength, elasticity and toughness under compression. The preparation method provided by the invention mainly comprises the following steps: step one, preparing expanded graphite, and carrying out surface modification treatment on the prepared expanded graphite; step two, preparing modified epoxy resin; and step three, preparing an expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material. The preparation method is mainly used for preparing the expanded graphite-epoxy resin-polyurethane resin pressure-resistant composite material.

Description

Technical field [0001] The invention belongs to the manufacturing field of pressure-resistant sealing materials, and particularly relates to a method for preparing an expanded graphite-epoxy-polyurethane resin pressure-resistant composite material. Background technique [0002] With the rapid development of petrochemical and nuclear power industries, the requirements for sealing materials are becoming more and more stringent. With its excellent properties, expanded graphite has long replaced asbestos as a new type of sealing material. Expanded graphite inherits many excellent properties of natural graphite itself, such as high temperature resistance, corrosion resistance and radiation resistance. Due to the special processing technology, the microstructure of natural graphite is changed, and the expanded graphite obtains a loose and porous structure, resulting in better compression performance. It is an excellent new sealing material and is widely used in various sealing environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L63/00C08K9/06C08K7/24
CPCC08L63/00C08L75/04C08K9/06C08K7/24
Inventor 王珏阚侃付东张伟君张晓臣
Owner HEILONGJIANG HEIKE TECH CO LTD
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