Fluorine rubber seal element and preparing method thereof

A seal and fluororubber technology, applied in the field of fluororubber seals and their preparation, can solve the problems of high cost, poor low temperature resistance, long downtime, etc., and achieve excellent process performance, long service life and high yield. Effect

Active Publication Date: 2008-04-30
广州国机智能橡塑密封科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binary fluororubber adopts bisphenol vulcanization system, which must be combined with metal oxides to be able to crosslink normally. The use of metal oxides reduces the water vapor resistance of fluororubber vulcanizates; and the long-term resistance of crosslinks formed by bisphenol vulcanization systems Water vapor performance is also poor
Peroxide vulcanized fluororubber has excellent water vapor resistance, but its large-scale application is limited because the price of this type of fluororubber is 4 to 6 times higher than that of ordinary binary fluororubber
Tetrapropylene fluororubber is an ideal peroxide vulcanized fluororubber, which has excellent heat resistance, water vapor resistance and good mechanical strength, but this kind of raw rubber has poor mi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 80 parts of binary fluororubber FE2603 (Sanaifu Company, Mooney viscosity ML1+10 is 80MU at 121°C), 20 parts of tetrapropylene fluororubber FE2701 (Sanaifu Company), and 30 parts of medium particle thermal carbon black , 4 parts of calcium hydroxide, 4 parts of lead oxide, 2 parts of hexafluoroisopropylidene diphenol, 0.5 parts of benzyltriphenylphosphorous chloride, 0.2 parts of sodium stearate, 0.4 parts of palm wax, diisopropyl peroxide Add 0.5 parts of propylene benzene and 0.5 parts of triallyl isocyanurate into the open mill and knead evenly at 60°C, then preform by extrusion, press and vulcanize on a flat vulcanizing machine at 177°C for 10 minutes, Cylinder liner seals can be produced after secondary vulcanization in hot air for 24 hours, and the above-mentioned parts are parts by mass.

Embodiment 2

[0024] 70 parts of binary fluororubber ML26-14 (Meilan Company, Mooney viscosity ML1+10 at 121°C is 100MU), 30 parts of tetrapropylene fluororubber FE2701 (Sanaifu Company), and 40 parts of medium particle thermal carbon black 3 parts of calcium hydroxide, 3 parts of lead oxide, 1.8 parts of hexafluoroisopropylidene diphenol, 0.3 parts of benzyltriphenylphosphorous chloride, 0.3 parts of sodium stearate, 0.6 parts of palm wax, di Add 0.5 parts of cumene and 1.2 parts of triallyl isocyanurate into the open mill and knead evenly at 70°C, then extrude and preform, mold and vulcanize on a flat vulcanizing machine at 165°C for 12 minutes, Cylinder liner seals can be prepared after secondary vulcanization in hot air for 20 hours, and the above-mentioned parts are parts by mass.

Embodiment 3

[0026] 75 parts of binary fluororubber AH110 (East Fluoro Technology Co., Ltd., Mooney viscosity ML1+10 at 121°C is 120MU), 25 parts of tetrapropylene fluororubber FE2701 (Sanaifu Company), and 33 parts of medium particle thermal carbon black , 3 parts of calcium hydroxide, 4 parts of lead oxide, 2 parts of hexafluoroisopropylidene diphenol, 0.4 parts of benzyltriphenylphosphorous chloride, 0.25 parts of sodium stearate, 0.5 parts of palm wax, diisopropyl peroxide Add 0.9 parts of propylene benzene and 0.9 parts of triallyl isocyanurate into the open mill and knead evenly at 70°C, then preform by extrusion, mold and vulcanize on a flat vulcanizing machine at 180°C for 8 minutes, and heat at 230°C After secondary vulcanization in hot air for 16 hours, the cylinder liner seal can be produced, and the above-mentioned parts are parts by mass.

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PUM

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Abstract

The invention provides a fluorinated rubber sealing element; the invention is characterized in that the sealing element is produced by the raw material with the following quality parts: binary fluorinated elastomer of 60 to 80 parts, tetrafluoroethlene propylene rubber of 20 to 40 parts, carbon black of 20 to 40 parts, calcium hydroxide of 3 to 5 parts, metal oxide of 3 to 6 parts, hexafluoride sonitroso propyl diphenol of 1.5 to 2 parts, benzyl triphenyl phosphorus chloride of 0.3 to 0.5 part, processing aid of 0.5 to 2 part, dicumyl peroxide of 0.5 to 1.2 parts, and triene propyl isocyan urate of 0.5 to 1.2 parts. The invention has the preparation method that sulphation for 8 to 12 minutes is molded on a compression machine under 165 to 180 DEG C through being extruded and formed after the raw material with the quality parts are added in mixing equipment to be mixed uniformly under 60 to 80 DEG C, and then the sealing element is produced after performing secondary cure for 8 to 24 hours in hot air of 200 to 250 DEG C. The fluorinated rubber sealing element produced has long service life and can be high temperature water vapor resistant and high and low impact resistant.

Description

technical field [0001] The invention belongs to the technical field of sealing, and in particular relates to a fluororubber sealing part and a preparation method thereof. Background technique [0002] The seals applied to the cylinder liners of diesel generator sets are usually composed of 5 O-ring seals, and the water vapor temperature is generally between 150°C and 200°C. When the diesel engine is working, due to the shock wave of the combustion gas explosion and the relative vibration between the piston and the cylinder liner, and between the cylinder liner and the cylinder block, the cooling water layer close to the outer wall of the cylinder liner will locally generate high pressure and high vacuum. On the surface of the sleeve, the greater the pressure change of the coolant, the phenomenon of air bubbles and bubble formation in the coolant due to the pressure drop is called cavitation. When the formed air bubbles and vapor bubbles are subjected to subsequent high pres...

Claims

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Application Information

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IPC IPC(8): C09K3/10C08L27/12C08K5/49C08K3/04C08K3/22C08K5/13C08K5/14C08K5/20
Inventor 肖风亮雷志云杨文良吴文涛
Owner 广州国机智能橡塑密封科技有限公司
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