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Rubber compositions for highly corrosive valves

A technology of rubber composition and valve, applied in the field of rubber composition, can solve the problems of poor product reliability, poor elasticity, difficult to meet high reliability requirements of high corrosion valves, etc., and achieve excellent resistance to flexural cracking and dynamic fatigue. The effect of performance, comprehensive performance improvement, and overall reliability improvement

Inactive Publication Date: 2011-12-14
JIANGSU JIANGHUA VALVE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many similar patents, but these patents have a common disadvantage, mainly poor elasticity, and the reliability of the product is not good enough, it is difficult to meet the high reliability requirements of high-corrosion valves for rubber quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: A rubber composition for highly corrosive valves, made of the following materials in weight percentage: 60 / 40 EPDM rubber 52KG, active zinc oxide 3KG, organic active agent stearic acid 0.5KG, N220 carbon black 13KG, N330 carbon black 18KG, silicon nitrogen compound 5KG, dimethyl phthalate 1KG, dispersant 1KG, sulfur 0.8KG, dicumyl peroxide 0.4KG, accelerator 2KG, flow agent 2.1KG, Zinc oxide 5KG, anti-aging agent 3.5KG, liquid softener 9KG, linseed oil 6KG, N, N'-diphenyl-p-phenylenediamine 0.8KG.

Embodiment 2

[0012] Example 2: A rubber composition for highly corrosive valves, made of the following materials in weight percent: 60 / 40 EPDM rubber 55KG, active zinc oxide 5KG, organic active agent stearic acid 0.7KG, N220 carbon black 18KG, N330 carbon black 22KG, silicon nitrogen compound 6KG, dimethyl phthalate 3KG, dispersant 2KG, sulfur 1KG, dicumyl peroxide 0.6KG, accelerator 2KG, flow agent 2.1KG, oxidation Zinc 5KG, anti-aging agent 4.5KG, liquid softener 12KG, linseed oil 8KG, N, N'-diphenyl-p-phenylenediamine 0.8-1.2KG.

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PUM

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Abstract

A rubber composition for highly corrosive valves of the present invention is made of the following materials in weight percent: 52-55 parts by weight of 60 / 40 EPDM rubber, 3-5 parts by weight of active zinc oxide, organic active agent 0.5-0.7 parts by weight of stearic acid, 13-18 parts by weight of N220 carbon black, 18-22 parts by weight of N330 carbon black, 5-6 parts by weight of silicon nitrogen compound, 1-3 parts by weight of dimethyl phthalate, dispersed 1-2 parts by weight of agent, 0.8-1 parts by weight of sulfur, 0.4-0.6 parts by weight of dicumyl peroxide, 2 parts by weight of accelerator, 2.1 parts by weight of flow agent, 5 parts by weight of zinc oxide, 3.5-4.5 parts by weight of anti-aging agent 9-12 parts by weight of liquid softener, 6-8 parts by weight of linseed oil, and 0.8-1.2 parts by weight of N,N'-diphenyl-p-phenylenediamine. The invention is characterized in that the formula is more reasonable, the prepared rubber composition has good elasticity and toughness, and is safer and more reliable when used in high-corrosion valves.

Description

technical field [0001] The invention relates to a rubber composition, in particular to a rubber composition used for high-corrosion valves. Background technique [0002] Ordinary valves often have poor sealing performance, easy leakage, easy perforation of the shell, and short service life under strong corrosion, toxic and harmful process conditions, and cannot meet the special requirements of long-term effective transportation of toxic media. In order to meet the needs of long-term and effective transportation of toxic media, some units and individuals have developed special valves suitable for the transportation of highly corrosive media. In order to ensure safety, rubber barriers are often installed around the valve. According to different use requirements, different material formulations are often equipped, and some units or individuals have applied for invention patents on this type of rubber composition. [0003] For example, on August 9, 2004, Tianjin Kaifa Valve Co....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/22C08K5/09C08K3/04C08K3/34C08K5/12C08K3/06C08K5/14C08K5/18
Inventor 陈善俊张国华
Owner JIANGSU JIANGHUA VALVE IND CO LTD
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