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Formula of nitrile rubber pad for sealing transformer oil

A technology of nitrile rubber and transformer oil, applied in chemical instruments and methods, and other chemical processes, can solve problems such as surface cracks, loss of sealing performance, and transformer oil leakage, so as to improve aging resistance, prolong service life, The effect of solving the leakage problem

Inactive Publication Date: 2012-12-05
保定市新科橡胶制品研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of oxidation, the nitrile rubber gasket gradually ages, mainly manifested as further crosslinking between molecules, the material gradually hardens, loss of elasticity causes compression permanent deformation to increase, surface cracks, etc., thus losing sealing performance
Nitrile rubber has poor aging resistance and short service life, which is the main cause of transformer oil leakage

Method used

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  • Formula of nitrile rubber pad for sealing transformer oil
  • Formula of nitrile rubber pad for sealing transformer oil
  • Formula of nitrile rubber pad for sealing transformer oil

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Embodiment Construction

[0012] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0013] In the implementation of the present invention, the numerical ratio of each component is as follows: weight percentage sees the following table

[0014] component name Example 1 Example 2 Example 3 Example 4 Nitrile rubber 3365 100 100 100 100 Carbon black N330 65 66 67 68 Dioctyl adipate DOA 5 7 12 17 Zinc oxide 10 11 12 13 stearic acid 1.0 1.2 1.4 1.5 Antiaging agent RD 1.0 1.5 1.8 2.0 Antiager MB 1.0 1.2 1.5 2.0 Vulcanizing agent DCP 3.0 4.0 4.0 5.0 Vulcanization aid TAIC 2.0 3.0 4.0 4.0

[0015] In order to verify the service life of the product of the present invention, the use environment and working state of the simulated gasket were carried out, and the compression set test was continuously done for 5000 hours. Open the experimen...

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Abstract

The invention relates to a formula of a nitrile rubber pad for sealing transformer oil, and belongs to the technical field of rubber sealing materials for transformers. The formula adopts the following technical scheme: the nitrile rubber pad comprises the following components by weight percent: 65-68% of carbon black N330, 5-17% of dioctyl adipate DOA, 10-13% of zinc oxide, 1-1.5% of stearic acid, 1-2% of antioxidant RD, 1-2% of antioxidant MB, 3-5% of vulcanizing agent DCP (dicumyl peroxide) and 2-4% of vulcanizing agent TAIC (triallyl isocyanurate), based on 100% of nitrile rubber 3365. All the materials in the formula are conventional materials which can be purchased in the market. The nitrile rubber pad for the production process and the background technology is not changed but the added raw materials and the proportions are different. The formula has the positive benefits as follows: the ageing-resistant performance of the materials is improved on the premise of guaranteeing the physical performance, the service life is prolonged, the requirement of the 30-year service life of a transformer is met, and the problem of leakage caused by ageing of the nitrile rubber pad is solved.

Description

technical field [0001] The invention relates to a formula of nitrile rubber pad used for sealing transformer oil, belonging to the technical field of rubber sealing materials for transformers. Background technique [0002] At present, the rubber sealing materials used in transformers mainly include nitrile rubber, acrylic rubber, fluororubber, neoprene rubber, fluorosilicone rubber, silicone rubber, ethylene propylene rubber, etc. The excellent oil resistance and good processability of nitrile rubber make it still the most widely used rubber sealing material in transformers. However, the molecular chain of nitrile rubber contains unsaturated double bonds, which determines that it is susceptible to oxidation by ozone, oxygen, etc., and this oxidation is more obvious under high temperature conditions during transformer operation. Under the action of oxidation, the nitrile rubber gasket gradually ages, mainly manifested as further crosslinking between molecules, the material g...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K13/02C08K3/04C08K5/11C08K3/22C08K5/09C08K5/3437C08K5/37C08K5/14C08K5/3492C09K3/10
Inventor 苏小平赵选勃许婉于振洪王冠澎
Owner 保定市新科橡胶制品研究所
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