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Nitrile rubber seal ring and preparation method thereof

A technology of nitrile rubber and sealing rings, which is applied in the field of nitrile rubber sealing rings and its preparation, can solve the problems of poor tensile and compression resistance physical properties, easy aging, poor oil resistance and corrosion resistance of sealing rings, etc., and achieves Strong oil resistance, low preparation cost, and simple materials

Active Publication Date: 2015-11-25
SUZHOU GOODTIME TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing sealing rings used for automobile fuel tanks have poor oil resistance and corrosion resistance, poor physical properties such as tensile resistance and compression resistance, and are also prone to aging

Method used

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  • Nitrile rubber seal ring and preparation method thereof
  • Nitrile rubber seal ring and preparation method thereof
  • Nitrile rubber seal ring and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw materials: 95 parts of nitrile rubber, 36 parts of zinc-calcium composite heat stabilizer CH400, 1.5 parts of epoxy soybean oil, 2 parts of nano-calcium carbonate, 35 parts of carbon black, 400 parts of butanone, 2 parts of activated magnesium oxide, 5 parts of nano-zinc oxide 0.75 parts of sulfur, 0.7 parts of accelerator CZ, 2.5 parts of antioxidant RD, and 8 parts of tannic acid.

[0027] Preparation method: According to the above formula, first put nitrile rubber and methyl ethyl ketone into the internal mixer for 3min plastication, then add carbon black, epoxy soybean oil and sulfur, knead for 6min, unload, cool to room temperature and put into the open mixer In the process, put other constituent raw materials into the open mill and fully mix to obtain the mixed rubber. After vulcanizing for 125s under the condition of 155°C, it is processed and shaped to obtain the nitrile rubber sealing ring.

Embodiment 2

[0029] Raw materials: 90 parts of nitrile rubber, 42 parts of zinc-calcium composite heat stabilizer CH40142, 0.8 parts of epoxy soybean oil, 3 parts of clay, 25 parts of high wear-resistant white carbon black, 500 parts of methyl isobutyl ketone, 3 parts of activated magnesium oxide , 8 parts of nano-zinc oxide, 1 part of sulfur, 0.6 parts of accelerator CZ, 3 parts of anti-aging agent RD, 7 parts of tannic acid.

[0030] Preparation method: According to the above formula, first put nitrile rubber and methyl isobutyl ketone into the internal mixer for plasticizing for 5 minutes, then add high wear-resistant white carbon black, epoxy soybean oil and sulfur, knead for 5 minutes, unload and cool Put it into the open mill at room temperature, put other constituent raw materials into the open mill and fully mix to obtain the mixed rubber, vulcanize at 160°C for 100s, and then process it to obtain the nitrile rubber sealing ring.

Embodiment 3

[0032] Raw materials: 100 parts of nitrile rubber, 30 parts of zinc-calcium composite heat stabilizer CH40230, 2.5 parts of epoxy soybean oil, 1 part of calcium silicate, 40 parts of carbon black, 300 parts of ethyl acetate, 1 part of activated magnesium oxide, nanometer zinc oxide 3 parts, 0.5 parts of sulfur, 0.8 parts of accelerator CZ, 2 parts of antioxidant RD, 10 parts of tannic acid.

[0033] Preparation method: According to the above formula, first put nitrile rubber and ethyl acetate into the internal mixer for plasticizing for 4 minutes, then add carbon black, epoxy soybean oil and sulfur, knead for 7 minutes, unload, cool to room temperature and put into refining In the machine, put other raw materials into the open mill and fully mix to obtain the mixed rubber. After vulcanizing at 150°C for 150 seconds, it is processed and shaped to obtain the nitrile rubber sealing ring.

[0034] "Ethyl acetate" in the above examples can also be replaced with "butyl acetate", and...

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Abstract

The invention discloses a nitrile rubber seal ring and a preparation method thereof. The nitrile rubber seal ring is prepared from the following raw materials in parts by weight: 90-100 parts of nitrile rubber, 7-10 parts of tannin, 30-42 parts of zinc-calcium composite heat stabilizer, 0.8-2.5 parts of epoxidized soybean oil, 1-3 parts of filler, 25-40 parts of a reinforcing agent, 300-500 parts of a solvent, 1-3 parts of active magnesium oxide, 3-8 parts of nano-zinc oxide, 0.5-1 part of sulfur, 0.6-0.8 part of accelerant CZ and 2-3 parts of an anti-aging agent RD. The nitrile rubber seal ring has the advantages of strong oil resistance, strong corrosion resistance, strong sealing performance and high temperature resistance. The preparation method is simple in materials, easy and convenient to operate, does not need complicated synthesizing equipment, and is relatively low in preparation cost.

Description

technical field [0001] The invention belongs to the field of sealing rings, in particular to a nitrile rubber sealing ring and a preparation method thereof. Background technique [0002] The rubber sealing ring is an annular cover composed of one or several parts, fixed on a ring or washer of the bearing, and contacts with another ring or washer or forms a narrow labyrinth gap, its function is to prevent the leakage of lubricating oil and foreign object intrusion. According to its material, the rubber sealing ring can be divided into: silicone rubber series, fluorine rubber series, polytetrafluoroethylene series, nitrile rubber series, neoprene nitrile series and EPDM rubber series. Among them, nitrile rubber is widely used in various oil-resistant rubber products because of its excellent oil resistance and physical and mechanical properties. In 2014, there were more than 30 countries producing nitrile rubber in the world, and the largest consumption area was the productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L91/00C08K13/02C08K3/26C08K3/34C08K3/04C08K3/36C08K3/22C08K3/06C08K5/47
Inventor 周波
Owner SUZHOU GOODTIME TECH DEV
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