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Ethylene propylene diene rubber composition and preparation method

A technology of EPDM rubber and composition, which is applied in the formulation and preparation of EPDM rubber and carbon black nano-composite materials, and can solve the problems of low tensile strength, unsuitable related properties, and limited application of sealing materials, etc. Problems, to achieve the effect of high elongation at break, high tensile strength, low compression set characteristics

Inactive Publication Date: 2012-07-18
BEIJING RES & DESIGN INST OF RUBBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is characterized in that it is made of EPDM rubber, filler, coupling agent, pigment and vulcanizing agent in proportion, mixed and then vulcanized. The obtained product has good elongation at break, but it is only limited to the production of plastic track and sports grounds, and the tensile strength is not high
[0007] The problems in the above method are either that the preparation process is not suitable, or the related properties are not suitable, which limits its application as a sealing material

Method used

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  • Ethylene propylene diene rubber composition and preparation method

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Embodiment 1

[0032] Embodiment 1: Formula composition: EPDM rubber (EXXON) 100 parts; Zinc oxide 10 parts; Stearic acid 0.5 part; Anti-aging agent RD 1.5 parts; Anti-aging agent MB 1.5 parts; Carbon black 65 parts; Plasticizer 15 parts Parts (5 parts of hydroxyl-terminated polybutadiene liquid rubber, 10 parts of paraffin oil); 5.5 parts of accelerator (0.5 parts of EZ, 1 part of DTDM, 4 parts of liquid TAIC); 5 parts of vulcanizing agent DCP; 0.3 parts of sulfur.

Embodiment 2

[0033] Embodiment 2: Formula composition: EPDM rubber (LANXESS) 100 parts; Zinc oxide 10 parts; Stearic acid 0.5 part; Anti-aging agent RD 1.5 parts; Anti-aging agent MB 1.5 parts; Carbon black 65 parts; Plasticizer 13 parts Parts (5 parts of hydroxyl-terminated polybutadiene liquid rubber, 8 parts of paraffin oil); 7.2 parts of accelerator (0.5 parts of EZ, 1 part of DTDM, 5.7 parts of solid TAIC); 4 parts of vulcanizing agent DCP; 0.3 parts of sulfur.

[0034] The novel high tensile strength of above-mentioned embodiment gained, the preparation method of the EPDM rubber / carbon black nano-composite material of high elongation at break and low compression set all comprises the following steps: (1) EPDM The rubber is masticated in two stages on the rubber mixer, and the time interval between the two mastications is 1 day; (2) Add zinc oxide, stearic acid, anti-aging agent, Carbon black, thin pass 4 times, and make 4 triangle bags; (3) add plasticizer (hydroxyl-terminated polybu...

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Abstract

The invention discloses an ethylene propylene diene rubber composition and a preparation method. The preparation method comprises the following steps of: firstly, performing after plastication on ethylene propylene diene rubber; then, adding zinc oxide, stearic acid, anti-aging agent, carbon black, plasticizers, accelerant, vulcanizer and the like in sequence; evenly mixing and then extruding a sheet; and preparing the sheet into the ethylene propylene diene rubber / carbon black nanometer composite material by adopting the after vulcanization process. Through adding various plasticizers and adopting special process treatment, the tensile strength of the ethylene propylene diene rubber composition disclosed by the invention is at least 15.2MPa, the elongation at break is at least 400 percent, and the compression set is lower than 30 percent under the condition of 125 DEG C*70h. The composite material can be used as a sealing article of rubber, especially a rubber sealing washer applied to a groove-type pipeline joint part of an automatic water spray fire extinguishing system, and thereby, a long-term sealing effect is ensured.

Description

technical field [0001] The invention relates to the technical field of rubber formulation and preparation, in particular to a formulation and preparation method of EPDM rubber and carbon black nanocomposite material. Background technique [0002] Rubber sealing products can prevent fluid medium from leaking from the sealed device, and also prevent external dust, sand, etc. from entering the sealed device, which is of great significance to ensure the performance of various devices, save materials and energy, and prevent environmental pollution. Used in various machinery, instruments, pipes, household appliances, vehicles and construction industries, etc. The most important feature of EPDM rubber is its superior aging resistance, and it can be filled with a large amount of fillers and oils with little effect on the properties. When the molecular weight or ethylene content of the raw rubber increases, the tensile strength of the rubber increases, but the processing performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L9/00C08K13/02C08K3/22C08K5/09C08K3/04C08K3/06C08K5/01B29B7/28B29C35/02
Inventor 吴文彪杨绪迎王雷
Owner BEIJING RES & DESIGN INST OF RUBBER IND
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