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Fluorinated polysiloxane sealant for sealing integral fuel tank of airplane

An integral oil tank and sealant technology, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of not finding high-temperature resistant sealants, affecting the sealing performance of sealing materials, and failing to meet the temperature and resistance requirements of fuel tanks. Fuel performance requirements and other issues, to achieve good fuel resistance, improve heat resistance stability, and improve the effect of temperature resistance

Active Publication Date: 2016-03-30
BAIMTEC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the long-term service temperature of the classic polysulfide sealant, modified polysulfide sealant and polythioether sealant used in the overall fuel tank of aircraft is less than 160 °C, while the temperature resistance requirement of the overall fuel tank sealant of high-speed aircraft has exceeded 200 °C. It can even reach 300°C, and put forward higher requirements for fuel resistance and adhesion. The above-mentioned sealants cannot meet the temperature and fuel resistance performance requirements of the fuel tank. At present, it is urgent to develop a sealant for the overall fuel tank of the aircraft with high heat resistance and fuel resistance; In addition, the existing room temperature curing sealant is prone to degradation reaction due to the influence of reaction by-products under airtight conditions, which affects the sealing performance of the sealing material
No published literature was retrieved on high temperature resistant sealants for aircraft integral fuel tank seals

Method used

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  • Fluorinated polysiloxane sealant for sealing integral fuel tank of airplane
  • Fluorinated polysiloxane sealant for sealing integral fuel tank of airplane
  • Fluorinated polysiloxane sealant for sealing integral fuel tank of airplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The composition formula of high temperature and fuel resistant fluorosilicone sealant is shown in Table 1:

[0020] Table 1 Formula composition of high temperature and fuel resistant fluorosilicone sealant

[0021]

[0022] The synthesis steps of the complex of platinum and siloxane are as follows: Platinum (0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane and methyl fluorosilicone oil according to 1: 100 mixed and stirred for 1 hour to obtain a dilution of the complex of platinum and siloxane.

[0023] The test piece prepared by using this compound has a tensile strength of 3.81MPa, an elongation at break of 308%, and a 180° peel strength of 3.12kN / m; after heat-resistant treatment at 250°C*100h, its The appearance has not changed, but the mechanical properties have declined slightly. The tensile strength is 3.16MPa, and the elongation at break is 281%. Under the same conditions, the polysulfide sample has been severely pulverized, and its mechanical properties afte...

Embodiment 2

[0025] The composition formula of high temperature and fuel resistant fluorosilicone sealant is shown in Table 2:

[0026] Table 2 The composition of the high temperature and fuel resistant fluorosilicone sealant

[0027]

[0028] The mixed coupling agent is the product obtained after mixing γ-glycidyl etheroxypropyltrimethoxysilane and γ-aminopropyltriethoxysilane and reacting at 60℃~80℃ for 1h~3h, mixing before reaction The coupling agent is γ-glycidyl etheroxypropyltrimethoxysilane and γ-aminopropyltriethoxysilane with a mass ratio of 1:1; the synthesis steps of the complex of platinum and siloxane are as follows: platinum (0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane and methyl fluorosilicone oil were mixed at a ratio of 1:100 and stirred for 1 hour to obtain a complex of platinum and siloxane Diluent.

[0029] The test piece prepared by using this compound formula has a tensile strength of 3.78MPa, an elongation at break of 316%, and a 180°peel strength of 3.65kN / ...

Embodiment 3

[0031] The composition formula of high temperature and fuel resistant fluorosilicone sealant is shown in Table 3:

[0032] Table 3 Formula composition of high temperature and fuel resistant fluorosilicone sealant

[0033]

[0034] The synthesis steps of the complex of platinum and siloxane are as follows: Platinum (0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane and methyl fluorosilicone oil according to 1: 100 mixed and stirred for 1 hour to obtain a dilution of the complex of platinum and siloxane.

[0035] The test piece prepared by using this compound has a tensile strength of 3.69MPa, an elongation at break of 321%, and a 180° peel strength of 3.58kN / m; after heat-resistant treatment at 250°C*100h, its The appearance has not changed, but the mechanical properties have declined slightly. The tensile strength is 3.02MPa, and the elongation at break is 299%. Under the same conditions, the polysulfide sample has been severely pulverized, and its mechanical properties afte...

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Abstract

The invention belongs to the technical field of preparation of sealants, and relates to a high-temperature-resistant fluorinated polysiloxane sealant for sealing an integral fuel tank of an airplane. The high-temperature-resistant fluorinated polysiloxane sealant is prepared from a component A and a component B. The component A is prepared from vinyl end capped liquid fluorinated silicone rubber, filler, a heat resisting agent, a coupling agent, H containing fluorosilicone oil and methyl fluorosilicone oil. The component B is prepared from a complex of platinum and siloxane and an inhibitor. According to the fluorinated polysiloxane sealant for sealing the integral fuel tank of the airplane, the temperature resisting grade of the integral fuel tank sealant is improved, the sealing effect is guaranteed, and the requirement for sealing the integral fuel tank of the high-speed airplane is met.

Description

technical field [0001] The invention belongs to the technical field of sealant preparation, and relates to a high-temperature-resistant fluorosilicon sealant used for sealing an aircraft integral fuel tank. technical background [0002] At present, the long-term service temperature of the classic polysulfide sealant, modified polysulfide sealant and polythioether sealant used in the overall fuel tank of aircraft is less than 160 °C, while the temperature resistance requirement of the overall fuel tank sealant of high-speed aircraft has exceeded 200 °C. It can even reach 300°C, and put forward higher requirements for fuel resistance and adhesion. The above-mentioned sealants cannot meet the temperature and fuel resistance performance requirements of the fuel tank. At present, it is urgent to develop a sealant for the overall fuel tank of the aircraft with high heat resistance and fuel resistance; In addition, the existing room temperature curing sealant is prone to degradatio...

Claims

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Application Information

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IPC IPC(8): C09J183/08C09J11/04C09J11/06C09K3/10
Inventor 于美超章谏正吴松华秦蓬波
Owner BAIMTEC MATERIAL CO LTD
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