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High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material

A sealing material, high temperature resistant technology, applied in the field of sealing materials, to achieve high elongation at break, not easy to migrate, and good protective effect

Inactive Publication Date: 2015-12-16
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most of the EPDMs seen in the market are used at 150°C for a long time, but there are few reports on the higher temperature of 175°C

Method used

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  • High-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material

Examples

Experimental program
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Effect test

example 1

[0020] Example 1: Put 100g of EPDM4045 thin pass on the double-roll mill, then add 4g of activator zinc oxide, 2g of magnesium oxide, 1g of stearic acid, and reactive anti-aging agent N-4( Anilinophenyl) maleimide (MC) 2g, reinforcing carbon black N330, N550 respectively 30g, 30g, polyisobutylene (PIB) 10g, finally add vulcanizing agent peroxidation and cumene (DCP) 2.5g , uniformly mixed on an open mill to obtain the mixed rubber, and then vulcanized on a 160°C flat plate to obtain vulcanized rubber. After punching the film, measure its mechanical properties, then place the film in an aging box at 175°C for aging, take it out after 96h and measure again Its mechanical properties are shown in Table 1.

example 2

[0021] Example 2: Put 100g of EPDM4045 thin pass on the double-roll mill, then add 4g of activator zinc oxide, 2g of magnesium oxide, 1g of stearic acid, and reactive anti-aging agent N-4( Anilinophenyl) maleimide (MC) 2g, reinforcing carbon black N330, N550 respectively 30g, 30g, polyisobutylene (PIB) 10g, finally add vulcanizing agent peroxidation and cumene (DCP) 2.5g and sulfur (S) 0.1g, uniformly mixed on the open mill to obtain the mixed rubber, and then vulcanized on a plate at 160°C to obtain the vulcanized rubber, measured its mechanical properties after punching, and then placed the film in an aging box at 175°C for aging. Take it out after 96 hours and measure its mechanical properties again, see Table 1.

example 3

[0022] Example 3: Put 100g of EPDM4045 thin pass on the double-roll mill, then add 4g of activator zinc oxide, 2g of magnesium oxide, 1g of stearic acid, and reactive anti-aging agent N-4( Anilinophenyl) maleimide (MC) 2g, reinforcing carbon black N330 and N550 respectively 30g and 30g, polyisobutylene (PIB) 10g, and finally add vulcanizing agent bis-tert-butyl peroxide diisopropylbenzene (BIPB) 4.2g, uniformly mixed on the open mill to obtain the mixed rubber, and then vulcanized on a plate at 170°C to obtain vulcanized rubber, measured its mechanical properties after punching, and then aged the film in an aging box at 175°C, after 96h Take it out and measure its mechanical properties again, see Table 1.

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PUM

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Abstract

The invention relates to a sealing material, particularly a high-temperature-resistant EPDM (ethylene-propylene-diene monomer) sealing material which is characterized in that the base rubber is EPDM 4045, the vulcanization system is a peroxide (BIPB (bis(tert-butylperoxy isopropyl)benzene) or DCP or (dicumyl peroxide)) system capable of stably connecting with rubber macromolecular chain or combination with sulfur, the anti-aging agent is a reactive anti-aging agent (NAPM or MC), the carbon black is one or combination of more of N330, N550 and N774, and the plasticizer is a drawable low-molecular-weight high-molecular plasticizer (PIB). The EPDM is combined with the other assistants with favorable heat resistance, so that the EPDM sealing material still has favorable mechanical properties and high temperature resistance at 175 DEG C, and can be used for a long time.

Description

technical field [0001] The invention relates to a sealing material, in particular to a high temperature resistant EPDM sealing material. Background technique [0002] EPDM is currently widely used in heat-resistant sealing materials and conveyor belts. The long-term use temperature of general-purpose EPDM is up to 150°C. After the temperature exceeds 150°C, EPDM begins to slowly degrade. Therefore, it has far-reaching significance to make EPDM use in an environment of about 175°C for a long time. [0003] To study its high temperature resistance, vulcanization system, anti-aging system, and plasticizing system become extremely important. At present, the combination of peroxide and cyanurate or sulfur and other auxiliary cross-linking agents is commonly used in the market to vulcanize EPDM. Although the retention rate after aging is better, the TAIC used is to increase the double bond effect, and The double bonds of EPDM itself are sufficient for cross-linking, which can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/22C08K13/02C08K3/22C08K5/09C08K5/3415C08K5/20C08K3/04C08K5/14B29C35/02
CPCC08L23/16B29C35/02C08K2201/014C08L2201/08C08L23/22C08K13/02C08K2003/2296C08K2003/222C08K5/09C08K5/3415C08K3/04C08K5/14C08K5/20
Inventor 王重李雪玉张宏泽张舒雅刘浩
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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