Ethylene-propylene-diene monomer

A technology of EPDM rubber and rubber material, which is applied in the field of EPDM rubber, and can solve the problems of EPDM rubber, such as easy blooming

Active Publication Date: 2013-08-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is in order to overcome the existing EPDM rubber in order to obtain good mechanical properties, often need to add a large amount of accelerators to cause the shortcomings of EPDM rubber easy to bloom, to provide a faster vulcanization rate and EPDM rubber with non-blooming and good mechanical properties

Method used

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  • Ethylene-propylene-diene monomer
  • Ethylene-propylene-diene monomer
  • Ethylene-propylene-diene monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 100 parts of EPDM rubber compound (Jihua J4045) to a double-roller rubber mixer at a temperature of 35±5°C and add 5 parts of active zinc oxide, 1 part of stearic acid, 80 parts of carbon black, and ASTM103# oil 50 parts, 4 parts of accelerator ZDBP, and 1.5 parts of insoluble sulfur IS60-10 were mixed evenly, and the mixing time was 21 minutes to obtain a blend. Then, the blend was vulcanized on a hydraulic plate vulcanizer at a temperature of 160°C and a pressure of 15 MPa for 40 minutes to obtain EPDM rubber.

[0038] The positive vulcanization time T of the EPDM rubber 90 It is 34 minutes and 23 seconds; the tensile strength at room temperature is 15.1MPa, the 100% modulus stress is 2.0MPa, the 300% modulus stress is 9.0MPa, the elongation at break is 476%, and the tear strength is 27KN / m . The tensile strength after aging at 120°C for 24 hours is 16.4MPa, the 100% modulus stress is 5.8MPa, and the elongation at break is 239%. The tensile strength after aging...

Embodiment 2

[0041] Add 100 parts of EPDM rubber (Jihua J4045) to a double-roller rubber mixer at a temperature of 35±5°C and add 6 parts of active zinc oxide, 1 part of stearic acid, 75 parts of carbon black, ASTM103# oil (Ningbo Xiejin Chemical Co., Ltd.) 45 parts, 8 parts of accelerator ZDBP, 3 parts of insoluble sulfur were mixed evenly, and the mixing time was 21 minutes to obtain a blend. Then, the blend was vulcanized on a hydraulic plate vulcanizer at a temperature of 160°C and a pressure of 15 MPa for 40 minutes to obtain EPDM rubber.

[0042] The positive vulcanization time T of the EPDM rubber 90 32 minutes and 55 seconds; the tensile strength at room temperature is 14.9MPa, the 100% modulus is 3.7MPa, the 300% modulus is 13.8MPa, the elongation at break is 325%, and the tear strength is 30KN / m . The tensile strength after aging at 120°C for 24 hours is 13.2MPa, the 100% modulus stress is 6.0MPa, and the elongation at break is 184%. The tensile strength after aging at 120℃×72...

Embodiment 3

[0044] Put 100 parts of EPDM rubber compound (Jihua J4045) on a double-roller rubber mixer at a temperature of 35±5°C and add 4 parts of active zinc oxide, 1 part of stearic acid, 85 parts of carbon black, and ASTM103# oil (Ningbo Xiejin Chemical Co., Ltd.) 55 parts, 6 parts of accelerator ZDBP, 0.5 part of accelerator M, 1 part of insoluble sulfur were mixed evenly, and the mixing time was 21 minutes to obtain a blend. Then, the blend was vulcanized for 30 minutes on a hydraulic plate vulcanizing machine with a temperature of 160° C. and a pressure of 15 MPa to obtain EPDM rubber.

[0045] The positive vulcanization time T of the EPDM rubber 90 25 minutes and 57 seconds; the tensile strength at room temperature is 13.2MPa, the 100% modulus is 2.7MPa, the 300% modulus is 11.0MPa, the elongation at break is 355%, and the tear strength is 32KN / m . The tensile strength after aging at 120°C for 24 hours is 12.5MPa, the 100% modulus stress is 3.7MPa, and the elongation at break i...

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Abstract

The invention discloses an ethylene-propylene-diene monomer. The ethylene-propylene-diene monomer is a product formed through mixing and vulcanizing a composition, wherein the composition includes 100 parts of an ethylene-propylene-diene monomer material, 0.5-4.5 parts by weight of a vulcanizing agent, 4-13 parts by weight of a vulcanizing activator system, 3-10 parts by weight of a promoter, 40-90 parts by weight of a reinforcing agent, and 5-60 parts of a softening plasticizer; the vulcanizing agent is insoluble sulfur and / or pre-dispersed sulfur; the vulcanizing activator system contains a component A and stearic acid; the component A is selected from zinc oxide and / or pre-dispersed zinc oxide; and the weight ratio of the component A to the stearic acid is 1-10:1. The optimal ethylene-propylene-diene monomer has the advantages of no blooming, no generation of nitrosamine, and good mechanical properties.

Description

technical field [0001] The invention relates to EPDM rubber. Background technique [0002] The unsaturation of EPDM rubber is much lower than that of other highly unsaturated diene rubbers. When vulcanized with sulfur vulcanization system, the vulcanization activity is low. In order to improve the vulcanization speed and vulcanization of rubber To a certain extent, a high amount of accelerator is usually used in the formulation together with the system. Due to the lack of active groups in the molecular structure of EPDM rubber, the cohesive energy is low, and the self-adhesiveness and mutual adhesion are very poor. When the content of accelerator added to the rubber material is high, the rubber material is easy to bloom. And in order to obtain good mechanical properties, the application of highly active superspeed accelerators (such as dithiocarbamate and thiuram) in EPDM rubber is very common. These accelerators often have a secondary amine structure, and react with nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/06C08K5/09C08K3/22C08K3/04C08K5/01B29B7/00B29C35/02
Inventor 李静于国柱王丽丽李传清陈建军曲亮靓赵青松刘苹刘翠云乔勋昌李绍宁
Owner CHINA PETROLEUM & CHEM CORP
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