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A fluorinated modified flame-retardant and aging-resistant rubber material and its preparation process

A rubber material and anti-aging technology, applied in the field of flame-retardant anti-aging rubber materials and their preparation, can solve the problems of low strength and toughness of fluororubber, blending preparation and the like

Active Publication Date: 2021-11-26
惠州东铭新能源材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a fluorinated modified flame-retardant and aging-resistant rubber material and its preparation process, wherein the main chain of the prepared fluorinated polyamide resin is prepared by cross-linking bibenzoyl chloride and aniline, and the main chain molecules are made of benzene The rings are connected alternately. Since the benzene ring itself has high rigidity, four benzene rings are connected in each main chain unit, which increases the rigidity of the entire main chain molecule, thereby improving the mechanical strength of the polymer molecule, and is flame retardant. When chitosan is cross-linked, since toluene diisocyanate contains benzene rings, grafting benzene rings on the polymer main chain can improve the rigidity of the prepared fluorinated flame-retardant rubber, and further improve the tensile strength of the fluorinated flame-retardant rubber. Strength, which solves the problem that the existing fluororubber materials cannot be prepared by blending with functional additives when modifying to improve performance, and the strength and toughness of fluororubber are low

Method used

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  • A fluorinated modified flame-retardant and aging-resistant rubber material and its preparation process
  • A fluorinated modified flame-retardant and aging-resistant rubber material and its preparation process
  • A fluorinated modified flame-retardant and aging-resistant rubber material and its preparation process

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Experimental program
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Effect test

Embodiment 1

[0030] The specific preparation process of fluorinated polyamide resin is as follows:

[0031] Step 1: Add 1kg of hexafluorodianhydride and 12L of dimethyl sulfoxide into the reaction vessel, stir and dissolve, then raise the temperature to 80°C, then add 0.21kg of methanol and 0.1kg of p-toluenesulfonic acid into it, react at constant temperature for 5h, and then put The product is passed through the column to obtain fluorinated biphenyl diacid ester;

[0032] Step 2: Dissolve 1 kg of the fluorinated methyl biphenylate prepared in Step 1 in a mixed solvent of 15 L of methanol, tetrahydrofuran and water, stir and dissolve, add 0.65 kg of sodium hydroxide to it, and stir for 2 hours to obtain The product is extracted by sodium carbonate aqueous solution to obtain fluorinated biphenyl tetraacid; methanol, tetrahydrofuran and water are mixed in a mixed solvent at a ratio of 1:1:1 to prepare;

[0033] Step 3: Add 1kg of the fluorinated biphenyl tetraacid prepared in step 2 into t...

Embodiment 2

[0037] The specific preparation process of fluorinated polyamide resin is as follows:

[0038] Step 1: Add 1kg of hexafluorodianhydride and 13L of dimethyl sulfoxide into the reaction vessel, stir and dissolve, then raise the temperature to 80°C, then add 0.24kg of methanol and 0.1kg of p-toluenesulfonic acid to it, react at constant temperature for 5h, and then put The product is passed through the column to obtain fluorinated biphenyl diacid ester;

[0039] Step 2: Dissolve 1 kg of the fluorinated biphenyl diacid methyl ester prepared in Step 1 in a mixed solvent of 18 L of methanol, tetrahydrofuran and water, stir and dissolve, add 0.67 kg of sodium hydroxide to it, and stir for 2 hours to obtain The product is extracted by sodium carbonate aqueous solution to obtain fluorinated biphenyl tetraacid; methanol, tetrahydrofuran and water are mixed in a mixed solvent at a ratio of 1:1:1 to prepare;

[0040] Step 3: Add 1 kg of the fluorinated biphenyl tetraacid prepared in step...

Embodiment 3

[0044] The specific preparation process of fluorinated polyamide resin is as follows:

[0045] Step 1: Add 1kg of hexafluorodianhydride and 12L of dimethyl sulfoxide into the reaction vessel, stir and dissolve, then raise the temperature to 80°C, then add 0.21kg of methanol and 0.1kg of p-toluenesulfonic acid into it, react at constant temperature for 5h, and then put The product is passed through the column to obtain fluorinated biphenyl diacid ester;

[0046] Step 2: Add 1kg of the fluorinated methyl biphenylate prepared in Step 1 into the reaction kettle, add 10L of acetone and 0.35kg of thionyl chloride at the same time, stir and react for 5h, and then obtain product A by distillation under reduced pressure;

[0047] Step 3: Add 1kg of the product A prepared in step 2 into the reactor, and at the same time add 10L of acetone to it, stir to dissolve and then raise the temperature to 70°C, then add 0.78kg of 2,4-diaminophenol to it, and reflux for 4 hours to obtain The visc...

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Abstract

The invention discloses a fluorinated modified flame-retardant and aging-resistant rubber material, which comprises the following components: 65-70 parts of fluorinated polyamide resin, 32-36 parts of flame-retardant chitosan, and 28 parts of toluene diisocyanate -31 parts, 5-8 parts of carbon black, 12-14 parts of montmorillonite, 4-5 parts of surfactant, 120-130 parts of N,N-dimethylformamide; the fluorinated polyamide resin prepared by the present invention The main chain is prepared by cross-linking bibenzoyl chloride and aniline. The main chain molecules are alternately connected by benzene rings. Due to the high rigidity of the benzene rings, each main chain unit is connected by four benzene rings, so that the entire main chain molecule The rigidity of the polymer is improved, thereby improving the mechanical strength of the polymer molecule, and when the flame-retardant chitosan is cross-linked, since the toluene diisocyanate contains a benzene ring, grafting the benzene ring on the polymer main chain can increase the prepared fluorine The rigidity of the flame-retardant rubber is improved, and the tensile strength of the fluorinated flame-retardant rubber is further improved.

Description

technical field [0001] The invention belongs to the field of rubber material preparation, and relates to a fluorinated modified flame-retardant and aging-resistant rubber material and a preparation process thereof. Background technique [0002] Fluorine rubber refers to a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of the main chain or side chain. The introduction of fluorine atoms endows rubber with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance. It has been widely used in aerospace, aviation, automobile, petroleum and household appliances and other fields. The key material that cannot be replaced in the industry, but the existing fluororubber has poor solvent resistance, flame retardancy and bonding performance, and cannot be prepared by blending with functional additives when modifying to improve performance, and the strength and Less toughness. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/12C08K3/04C08K3/34C08L75/04C08G18/64C08G18/60C08G18/40C08G69/42C08B37/08B29C35/02
CPCB29C35/02C08B37/003C08G18/4081C08G18/603C08G18/6484C08G69/42C08K3/04C08K3/346C08L2201/02C08L2201/08C08L75/12C08L75/04
Inventor 喻跃琴
Owner 惠州东铭新能源材料股份有限公司
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