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Fluorine-silicon sealant for fuel oil-resisting solvent part and preparation method for fluorine-silicon sealant

A sealant, fuel-resistant technology for rubber applications

Inactive Publication Date: 2015-11-25
SUZHOU DATONG ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to prepare a kind of fluorosilicon sealant of oil-resistant solvent part, to solve the problem of oil-resistant sealant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The composition and content of the LED silicone potting compound by weight are:

[0019] Viscosity 20000mPa·S Hydroxyl-terminated fluorosilicone rubber

100 copies

The specific surface area is 150m 2 / g silica

10 copies

Active Nano Calcium Carbonate

50 copies

[0020] tetraethyl orthosilicate

15 copies

Accelerator

1 copy

catalyst

0.2 parts

[0021] Process formula:

[0022] Base material: Add hydroxyl-terminated fluorosilicone rubber, white carbon black and activated nano-calcium carbonate according to the formula, and stir at high speed under vacuum for 1 hour.

[0023] Auxiliary: Mix tetraethyl orthosilicate, accelerator and catalyst evenly according to the formula.

[0024] When in use, it is mixed evenly according to the ratio of base material to additives at 10:1, and it can be used after removing air bubbles under vacuum.

Embodiment 2

[0026] The composition and content of the LED silicone potting compound by weight are:

[0027] Viscosity 20000mPa·S Hydroxyl-terminated fluorosilicone rubber

100 copies

The specific surface area is 150m 2 / g silica

17 copies

tetraethyl orthosilicate

10 copies

Accelerator

1 copy

catalyst

0.2 parts

[0028] Process formula:

[0029] Base material: Add hydroxyl-terminated fluorosilicone rubber and white carbon black according to the formula, and stir at high speed under vacuum for 1 hour.

[0030] Auxiliary: Mix tetraethyl orthosilicate, accelerator and catalyst evenly according to the formula.

[0031] When in use, it is mixed evenly according to the ratio of base material to additives at 10:1, and it can be used after removing air bubbles under vacuum. Example 1:

[0032] The composition and content of the LED silicone potting compound by weight are:

[0033] Viscosity 20000mPa·S Hydroxyl-terminated...

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PUM

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Abstract

The invention discloses a fluorine-silicon sealant for a fuel oil-resisting solvent part. The fluorine-silicon sealant is characterized by comprising the following components in parts by weight: 100 parts of hydroxyl end-capping fluorinated silicone rubber, 5-20 parts of white carbon black, 0-100 parts of nano calcium carbonate, 10-20 parts of a cross-linking agent, 1-5 parts of an accelerant, and 0.2-0.5 part of a curing agent. A preparation method for the sealant is characterized by comprising: preparing a base stock: adding the hydroxyl end-capping fluorinated silicone rubber, the white carbon black and the active nano calcium carbonate according to a formula, and stirring the mixture for one hour at a high speed in vacuum; preparing an auxiliary agent: uniformly mixing the tetraethylortho silicate, the accelerant and the catalyst according to the formula; and in use, adding 1 part of the auxiliary agent into 10 parts of the base stock, and uniformly stirring the mixture in vacuum to obtain the sealant. The product has good fuel oil resistance and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a fluorosilicon sealant used for parts resistant to fuel oil solvents and a preparation method thereof. Background technique [0002] With the development of national defense and modern science and technology, the requirements for materials are becoming more and more stringent. The development of organosilicon materials began in the 1930s. Performance, aging resistance, self-extinguishing properties and other excellent properties; while fluorocarbon materials have good thermal stability, and have extremely superior resistance to fuel and chemical media. Dowcorning skillfully complements the advantages of fluorine materials with good oil resistance, chemical medium resistance and poor low temperature resistance with organic silicon materials, and develops a series of fluorosilicon products. [0003] Fluorosilicone rubber is widely used in the market, and has been used ...

Claims

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Application Information

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IPC IPC(8): C08L83/08C08L83/06C08K13/06C08K3/36C08K3/26C09K3/10
Inventor 任天斌王永涛欧杰武传业
Owner SUZHOU DATONG ADVANCED MATERIAL
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