Fluorine-silicon sealant for fuel oil-resisting solvent part and preparation method for fluorine-silicon sealant
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A sealant, fuel-resistant technology for rubber applications
Inactive Publication Date: 2015-11-25
SUZHOU DATONG ADVANCED MATERIAL
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Problems solved by technology
[0005] The purpose of the present invention is to prepare a kind of fluorosilicon s
Method used
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Embodiment 1
[0018] The composition and content of the LED silicone potting compound by weight are:
[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:
[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:
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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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