Rubber composition used for valve base, preparation method thereof and the valve base

A technology of a rubber composition and a valve seat, applied in the rubber field, can solve the problems of poor high and low temperature resistance, poor flame retardancy and environmental protection, poor corrosion resistance, etc., and achieve the effects of low production cost, high production efficiency and short vulcanization time

Inactive Publication Date: 2015-10-14
天津滨海新区大港汇丰汽车装饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of the centerline butterfly valve seat material, such as poor sealing performance, poor structure uniformity, poor corrosion resistance, poor high and low temperature resistance, poor flame retardancy and environmental protection, and poor wear resistance, the invention provides a new type of rubber composition and preparation method And the valve seat prepared by using the rubber composition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh 15Kg ethylene propylene rubber 4640, 5.24Kg carbon black N330, 9Kg carbon black reinforcing agent N774, 3Kg paraffin oil, 6Kg light calcium, 0.75Kg zinc oxide, 0.2Kg stearic acid, 0.26KgAFLUX-42, 0.05 Kg accelerator TRA, 0.675Kg plasticizer DCP, 0.045Kg sulfur S;

[0021] (2) Put the ethylene-propylene rubber in an internal mixer for 80 seconds, add zinc oxide and stearic acid and mix for 40 seconds, add carbon black N330, carbon black reinforcing agent N774, paraffin oil, light calcium, AFLUX- 42 Mixing for 120 seconds to get a section of glue, the temperature of mastication and mixing is 120 o C;

[0022] (3) Put a piece of rubber on the open mill, add accelerator TRA, plasticizer DCP, sulfur S, and put it at 70 o C, knead until the cross-section is uniform, and the second-stage glue is obtained after the sheet is released;

[0023] (4) After molding the second-stage rubber, put it on the vulcanizer at 175 o C vulcanized for 12 minutes to obtain a first-...

Embodiment 2

[0025] (1) Weigh 18.5Kg ethylene propylene rubber 4640, 7Kg carbon black N330, 6Kg carbon black reinforcing agent N774, 3Kg carbon black N220, 3.3Kg paraffin oil, 1Kg zinc oxide, 0.22Kg stearic acid, 0.26Kg AFLUX-42, 0.83Kg accelerator DCP, 0.055Kg sulfur S;

[0026] (2) Put ethylene-propylene rubber in an internal mixer for 80 seconds, add zinc oxide and stearic acid and mix for 40 seconds, add carbon black N330, carbon black N220, carbon black reinforcing agent N774, paraffin oil, light Calcium, AFLUX-42 banburying 120 seconds to get a section of glue, plasticizing and mixing temperature is 120 o C;

[0027] (3) Put a piece of rubber on the open mill, add accelerator TRA, plasticizer DCP, sulfur S, and put it at 70 o C, knead until the cross-section is uniform, and the second-stage glue is obtained after the sheet is released;

[0028] (4) After molding the second-stage rubber, put it on the vulcanizer at 175 o C vulcanized for 12 minutes to obtain a first-stage vulcaniz...

Embodiment 3

[0030] (1) Weigh 13Kg ethylene propylene rubber 4640, 7Kg ethylene propylene rubber powder, 6Kg carbon black N330, 8.3Kg carbon black reinforcing agent N774, 3.5Kg naphthenic oil, 6.3Kg light calcium, 0.75Kg zinc oxide, 0.12Kg hard Fatty acid, 0.24Kg AFLUX-42, 0.24Kg PEG-40000, 0.1Kg accelerator TRA, 0.7Kg plasticizer DCP, 0.045Kg sulfur S;

[0031] (2) Put the ethylene-propylene rubber in an internal mixer for 80 seconds, add zinc oxide and stearic acid and mix for 40 seconds, add carbon black N330, carbon black reinforcing agent N774, paraffin oil, light calcium, AFLUX- 42 Mixing for 120 seconds to get a section of glue, the temperature of mastication and mixing is 120 o C;

[0032] (3) Put a piece of rubber on the open mill, add accelerator TRA, plasticizer DCP, sulfur S, and put it at 70 o C, knead until the cross-section is uniform, and the second-stage glue is obtained after the sheet is released;

[0033] (4) After molding the second-stage rubber, put it on the vulca...

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PUM

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Abstract

The invention discloses a rubber composition used for a valve base, wherein the rubber composition includes: ethylene-propylene rubber 4640, carbon black N330, carbon black N220, a carbon black reinforcing agent N774, paraffin oil, light calcium, zinc oxide, stearic acid, a dispersing agent (AFLUX-42), dipentamethylenethiuram tetrasulfide (accelerant TRA), N,N'-m-phenylene dimaleimide (accelerant HVA-2), dicapryl phthalate (plasticizer DCP), and sulfur S. The invention also provides a preparation method of the rubber composition, comprising the steps of internal mixing, open milling and vulcanization. The rubber composition can be used for making a valve base or a wear-resistant valve base of a center line-type butterfly valve. The preparation method is simple in formula and process, is short in vulcanization time, is high in production efficiency, is low in production cost and is easy to achieve industrialization. The valve base made of the rubber composition is good in sealing performance, is uniform in structure, is corrosion-resistant, high-temperature-resistant and low-temperature-resistant, is flame-retarding and environment-friendly, and is wear-resistant.

Description

[0001] technical field [0002] The invention relates to the technical field of rubber, in particular to a rubber composition and a preparation method thereof, and a centerline butterfly valve seat or a centerline butterfly valve wear-resistant valve seat prepared by using the rubber composition disclosed in the invention. Background technique [0003] The centerline butterfly valve is a component used to realize on-off and flow control of the pipeline system, and has been widely used in petroleum, chemical industry, metallurgy, hydropower, automobile and other fields. The valve seat is one of the main parts of the centerline butterfly valve, which is used to support the fully closed position of the valve core. The valve seat is generally located on the valve body. When the rotating shaft drives the valve plate to rotate, the valve plate contacts the valve seat to make the valve close to a sealed state. Therefore, the valve seat plays a vital role in the sealing performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L9/06C08L17/00C08K13/02C08K3/04C08K3/26C08K3/22C08K5/09C08K5/18
CPCC08L23/16C08K2201/014C08L9/06C08L2201/02C08L2201/08C08L2205/025C08L2205/035
Inventor 顾孟良
Owner 天津滨海新区大港汇丰汽车装饰有限公司
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