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Fuel oil resistant ethylene-propylene-diene monomer formula

An EPDM rubber and fuel-resistant technology, which is applied in the field of automotive hoses, can solve problems such as poor thermal tearing and product blooming, and achieve fast vulcanization speed, good oil resistance, and good vulcanization effect

Inactive Publication Date: 2018-03-06
阜阳市利普新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although peroxide vulcanized materials have good properties, they have poor thermal tear resistance and are not suitable for manufacturing intake hoses by injection molding process; the common vulcanization system of ethylene-propylene rubber was used earlier, and the injection process is characterized by high temperature and short-term vulcanization, and the product is easy to blooming phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] A fuel-resistant EPDM formula, made from the following raw materials in parts by weight (kg):

[0018] EPDM rubber (K4551A) 200, paraffin oil 100, fast extrusion carbon black (N550) 90, semi-reinforcing carbon black (N774) 60, silicon powder (B-66) 40, CTP-80 0.5, zinc oxide 5. Stearic acid 1, complex accelerator GA 2, sulfur 0.8, 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) 1.

[0019] A fuel-resistant EPDM formula, characterized in that the mixing process is as follows:

[0020] Put the EPDM raw rubber into the open mixer, set the pressure to 4-6MPa, the temperature to 70-80°C, and the speed to 45-55rpm, pressurize and knead for 60-65s for the first time, put in and press out Carbon black, semi-reinforcing carbon black, paraffin oil, adjust the speed to 30-40rpm, carry out the second pressurized mixing, then exhaust for 10-15s, add other remaining materials, heat up to 105-115°C for the third Pressurize and knead for the first time, and then heat up to 145-155°...

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PUM

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Abstract

The invention discloses a fuel oil resistant ethylene-propylene-diene monomer (EPDM) formula which is characterized by comprising raw materials, namely an ethylene-propylene-diene monomer, paroline, fast extruding furnace black, half-reinforced carbon black, silicon powder, CTP-80, zinc oxide, stearic acid, a composite accelerant GA, sulfur and 2,2,4-trimethyl-1,2-dihydroquinone polymer (RD) 1-3.A raw ethylene-propylene-diene monomer is of a grade of a high molecular weight, a high ethylene content and a high ENB content, and although the intrinsic quality that the EPDM (Ethylene-Propylene-Diene Monomer) is poor in oil resistance is not changed, the fuel oil resistance swelling degree of the rubber is reduced to a certain extent; the novel composite accelerant GA comprises only one accelerant instead of multiple raw materials, and is a special EPDM accelerant and is compounded with a small amount of sulfur, so that the vulcanization effect is good, and a product is free of blooming; the formula is applicable to vulcanization of a glue injection process; and the system is relatively rapid in rubber compound vulcanization speed, and vulcanized rubber is excellent in physical property and good in thermal oxidation resistance, ozone aging resistance and oil resistance.

Description

technical field [0001] The invention relates to the technical field of automobile rubber hoses, in particular to a fuel-resistant EPDM formula. Background technique [0002] EPDM is abbreviated as EPDM, which is a non-polar rubber. It has no resistance to general non-polar mineral oil and fuel oil, and can be severely swollen by such oils and become invalid. This is also the performance advantage of EPDM rubber. Biggest flaw. At present, EPDM or nitrile PVC blends are mostly used as materials for automobile air intake hoses, and ethylene propionate rubber (AEM) and epichlorohydrin rubber (ECO) are also used in some models. Since the intake hose is connected to the engine connecting pipe, there must be incompletely burned oil and gas returning to the hose, so the intake hose is required to have a certain oil resistance; at the same time, because the automobile intake hose is arranged near the engine, that is, the high temperature area , so the hose is also required to hav...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L91/06C08K13/02C08K3/04C08K3/36C08K3/22C08K5/09
Inventor 陈国玲申会杰张瑞造刘强邵亚飞
Owner 阜阳市利普新材料科技有限公司
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