A high-temperature-resistant and aging-resistant EPDM rubber seal and preparation method thereof

A technology of EPDM rubber and seals, which is applied in the field of rubber materials, can solve problems such as greatly affecting production efficiency, failure of seals, hidden safety hazards, etc., and achieve good processing performance, good elasticity and processing fluidity, and save energy. cost effect

Active Publication Date: 2020-07-14
JIHUA 3517 RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some special rubber products need to be vulcanized at a temperature of 180°C or even higher. Conventional EPDM rubber seals are used during vulcanization of steam cylinders, which can only be used for a short period of time and need to be replaced frequently, which has a great impact on production efficiency. Large, and the seal may fail at any time, causing safety hazards

Method used

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  • A high-temperature-resistant and aging-resistant EPDM rubber seal and preparation method thereof
  • A high-temperature-resistant and aging-resistant EPDM rubber seal and preparation method thereof
  • A high-temperature-resistant and aging-resistant EPDM rubber seal and preparation method thereof

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Experimental program
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preparation example Construction

[0049] The preparation method of the aging-resistant EPDM sealing member for the above-mentioned high-temperature vulcanization steamer comprises the following steps: A, pre-smelting: 80-90 parts of EPDM rubber and 10-20 parts of saturated styrene thermoplastic elastomer The parts are combined in the open mill, thin pass 6-8 times, and the roll distance is 1mm. B. Mixing: Add filling reinforcing agent and plasticizer to the rubber obtained in step A, then add other components such as vulcanizing agent, accelerator, active agent, etc., and carry out mixing. The mixing time is 10-20min. The distance is 3-4mm, the temperature of the mill is controlled at 50-70°C, and the sheet is parked for 24 hours to obtain the mixed rubber. C. Re-milling: re-milling the mixed rubber obtained in step B, the number of times of thinning is 4-6 times, the roller distance is 1mm, the temperature of the open mill is 40-60°C, and then the sheet is produced, and the thickness of the sheet is 3-5mm. D...

Embodiment 1

[0054] An aging-resistant EPDM seal for high-temperature vulcanized steam cylinders, the EPDM seal includes the following components: 80 parts of EPDM, 20 parts of saturated styrene thermoplastic elastomer , 11 parts of active agent, 3.4 parts of vulcanizing agent, 2 parts of accelerator, 55 parts of filling and reinforcing agent, 5 parts of plasticizer, and 1 part of microcrystalline wax. Wherein, active agent selects 10 parts of metal oxides and 1 part of stearic acid for use; Vulcanizing agent selects 0.4 part of sulfur for use, 2 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy) hexane ( Double 2-5), 1 part of triallyl isocyanurate (TAIC); the accelerator uses 1 part of 4,4'-dithiodimorpholine (DTDM), 1 part of dipentylene cyridine tetrasulfide Mu (TRA); 50 parts of carbon black (including 5 parts of O carbon black) and 5 parts of silicate attapulgite modified clay are selected as filling reinforcing agent; 5 parts of paraffin oil are selected as plasticizer.

[0055] The p...

Embodiment 2

[0057] An aging-resistant EPDM seal for high-temperature vulcanized steam cylinders, the EPDM seal includes the following components: 90 parts of EPDM, 10 parts of saturated styrene thermoplastic elastomer , 17 parts of active agent, 5.8 parts of vulcanizing agent, 4 parts of accelerator, 70 parts of filling and reinforcing agent, 15 parts of plasticizer, and 2 parts of microcrystalline wax. Wherein, activator selects 15 parts of metal oxides and 2 parts of stearate; Vulcanizing agent selects 0.8 part of sulfur, 3 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (Double 2-5), 2 parts of triallyl isocyanurate (TAIC); 1 part of N-cyclohexyl-2-benzothiazole sulfenamide (CZ) as accelerator, 1 part of tetrasulfide Methylthiuram (TMTD), 1 part of 4,4'-dithiodimorpholine (DTDM), 1 part of dipentylthiuram tetrasulfide (TRA); 60 parts of carbon black ( It contains 20 parts of O carbon black) and 10 parts of silicate attapulgite modified clay; the plasticizer is selected from 10 p...

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Abstract

The invention discloses a high temperature-resistant aging-resistant ethylene propylene diene monomer sealing member. The ethylene propylene diene monomer sealing member comprises the following components in parts by weight: 80-90 parts of ethylene propylene diene monomer, 10-20 parts of a saturation-type styrene thermoplastic elastomer, 11-17 parts of an activator, 3.4-5.8 parts of a vulcanizing agent, 2-4 parts of a promoter, 55-70 parts of a filling reinforcing agent, and 5-15 parts of a plasticizer; and the Mooney viscosity of ethylene propylene diene monomer is 30-50 N.m. In addition, the invention also provides a preparation method of the ethylene propylene diene monomer sealing member used for a high-temperature vulcanization steam cylinder. Through components selection and content optimization as well as cooperation effect, by combining process improvement, the high temperature-resistant aging-resistant vulcanized rubber product can be prepared, and can be used for sealing a cylinder cover and a cylinder body of the high-temperature vulcanization steam cylinder. By employing a mixing technology, uniform dispersion of a compounding agent is guaranteed, internal stress is eliminated, and the mixed compound quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of rubber materials, and relates to a high-temperature-resistant and aging-resistant EPDM rubber seal and a preparation method thereof, in particular to a three-component vulcanized steam cylinder used under high temperature (180-200°C) conditions for a long time An ethylene-propylene-diene rubber seal and a preparation method thereof. Background technique [0002] At present, the general use temperature of EPDM rubber seals is below 150°C, and it can be used at 200°C in a short period of time. If the temperature exceeds 150°C and it needs to be used for a long time, the EPDM seals must be improved. [0003] Conventional vulcanization steam cylinders for rubber products are generally used for vulcanization of rubber shoes, and the temperature is generally controlled at about 150°C. The use of general EPDM rubber seals can meet the use requirements. However, some special rubber products need to be vulcanized at a temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L53/02C08L91/06C08L61/06C08K13/06C08K3/22C08K5/09C08K3/06C08K5/14C08K5/3492C08K5/357C08K5/40C08K3/04C08K9/02C08K3/34C08K5/47
CPCC08L23/16C08L2201/08C08L2205/03C08L2205/035C08L53/02C08L91/06C08K13/06C08K3/22C08K5/09C08K3/06C08K5/14C08K5/3492C08K5/357C08K5/40C08K3/04C08K9/02C08K3/346C08L61/06C08K5/47
Inventor 肖伟
Owner JIHUA 3517 RUBBER PROD
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