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A kind of curable composition of high-strength perfluoropolyether fluorosilicone oil and its preparation method

A technology of perfluoropolyether and fluorosilicone oil, applied in the field of materials, can solve problems such as poor mechanical properties, low crosslinking density of materials, and low vinyl functionality

Active Publication Date: 2019-04-26
太仓中化环保化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN201110154562.8 discloses a fluorosilicone cured product containing double-ended vinyl perfluoropolyether resin and hydrogen-containing fluorosilicone oil. However, the vinyl functionality in the perfluoropolyether resin in this formula is small, so the The crosslinking density of the prepared material is not high and the mechanical properties are poor

Method used

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  • A kind of curable composition of high-strength perfluoropolyether fluorosilicone oil and its preparation method
  • A kind of curable composition of high-strength perfluoropolyether fluorosilicone oil and its preparation method
  • A kind of curable composition of high-strength perfluoropolyether fluorosilicone oil and its preparation method

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Embodiment 1

[0090] This embodiment provides a perfluoropolyether dimethyl ester, the structural formula of which satisfies the formula V, wherein, a+b=20, R 3 =CH 3 , Y=CF 2 CF 2 CF 2 .

[0091] The preparation method of this perfluoropolyether dimethyl ester is as follows:

[0092] Step 1: Add 10g of anhydrous cesium fluoride (provided by Nanjing Sitaibao Trading Co., Ltd.) and 200g of tetraethylene glycol dimethyl ether (dehydrated and distilled with metal sodium in advance) to the stainless steel reactor under the protection of high-purity nitrogen. Purification, provided by Anhui Yipu Chemical Co., Ltd.), start stirring and cool down to -5°C, add 100g perfluoromalonyl fluoride (provided by Bailingwei Technology Co., Ltd.);

[0093] Step 2: Under the condition of keeping the reaction temperature constant, stir and slowly introduce 300g of hexafluoropropylene oxide (Quzhou Jiangtian Fluorine Chemical Co., Ltd.), and keep the reaction for 12 hours;

[0094] Step 3: Cool the above r...

Embodiment 2

[0098] This embodiment provides a perfluoropolyether dimethyl ester, the structural formula of which satisfies the formula V, wherein, a+b=40, R 3 =CH 3 , Y=CF 2 CF 2 CF2 .

[0099] In this embodiment, the mass of the added raw material hexafluoropropylene oxide was changed to 4700 g after the temperature was lowered to -38° C. in step 3, and the others were the same as in embodiment 1.

Embodiment 3

[0101] This embodiment provides a perfluoropolyether dimethyl ester, the structural formula of which satisfies the formula V, wherein, a+b=60, R 3 =CH 3 , Y=CF 2 CF 2 CF 2 .

[0102] In this embodiment, the mass of the added raw material hexafluoropropylene oxide was changed to 7000 g after the temperature was lowered to -38° C. in step 3, and the others were the same as in embodiment 1.

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Abstract

The invention relates to a curable composition of high-strength perfluoropolyether fluorosilicone oil and a preparing method thereof. The raw material formula of the composition includes the following ingredients: 100 parts by weight of polyvinyl perfluoropolyether fluorosilicone oil, 5-50 parts by weight of hydrogen and fluorine containing silicon oil, 5-50 parts by weight of a filler, 0.01-5 parts by weight of an inhibitor, and 0.1-5 parts by weight of a catalyst. Polyvinyl perfluoropolyether fluorosilicone oil is relatively high in vinyl functionality and resistance to chemical corrosion and improved in crosslinking density of the fluorine-silicon curable composition, overcomes the disadvantage that the composition has low mechanical strength in a prior art, and can obviously improve mechanical strength and acid corrosion resistance of rubber during rubber preparation.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a high-strength perfluoropolyether fluorosilicone oil curable composition and a preparation method thereof. Background technique [0002] Fluorosilicone material combines the structure and properties of organic fluorine and silicone, and has the characteristics of low surface energy, high and low temperature resistance, oil and solvent resistance, corrosion resistance, and good insulation. It is widely used in automobiles, electronics, daily chemicals, fields such as medicine and aerospace. Polytrifluoropropylmethylsiloxane (PTFPMS) is the earliest fluorosilicone material developed and applied. It is mainly used in fuel oil-resistant fuel oil-resistant and lubricating oil seals or contacts of automobiles and aircraft, such as fuel power systems. Turbo tube. However, it cannot resist the corrosion of polar solvents or highly corrosive fluids. By introducing long fluorine-con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/12C08L83/08C08L83/04C08K9/06C08K3/36C08K3/04C08G77/46C08G77/24
CPCC08G77/24C08G77/46C08L83/12C08L2205/02C08L2205/03C08L83/08C08L83/04C08K9/06C08K3/36C08K3/04
Inventor 徐涛吴克安李月刚盛磊
Owner 太仓中化环保化工有限公司
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