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Ethylene propylene diene monomer rubber and preparation method thereof

A EPDM rubber, gel-like technology, applied in the chemical industry, can solve the problems of performance degradation and inability to use, and achieve the effect of good low temperature performance and excellent cold resistance performance.

Inactive Publication Date: 2018-06-15
宁波爱得智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the products show good performance above -20°C, but the performance degradation is serious when the temperature is below -20°C, and basically unusable when the temperature is below -40°C

Method used

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  • Ethylene propylene diene monomer rubber and preparation method thereof
  • Ethylene propylene diene monomer rubber and preparation method thereof
  • Ethylene propylene diene monomer rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of ethylene propylene diene monomer, comprises following composition by weight:

[0032]

[0033] The third monomer is ethylidene norbornene (ENB).

[0034] Described vanadium series catalyst is VOCl 3 , the alkylaluminum compound is trimethylaluminum, the activator is ethyl trichloroacetate, and the molar ratio between the alkylaluminum compound and the vanadium-based catalyst is 15; the activator and the vanadium-based The molar ratio of the catalyst was 4.

[0035] Described organic solvent is pentane.

[0036] The terminator is sodium dimethyl dithiocarbamate.

[0037] The stabilizer is tribasic lead sulfate.

[0038] A preparation method of EPDM, comprising the steps of:

[0039] (1) take each raw material according to weight component;

[0040] (2) Polymerization: Add the third monomer, catalyst, and organic solvent that have been weighed into the reaction kettle that has been replaced with nitrogen in advance, and after fully stirring, feed a mixe...

Embodiment 2

[0045] A kind of ethylene propylene diene monomer, comprises following composition by weight:

[0046]

[0047] The third monomer is dicyclopentadiene (DCPD).

[0048] Described vanadium series catalyst is VOCl 3 , the alkylaluminum compound is triethylaluminum, the activator is diethylchlorobenzenemalonate, and the molar ratio of the alkylaluminum compound and the vanadium catalyst is 40; the activation The molar ratio of agent to vanadium series catalyst is 8.

[0049] Described organic solvent is hexane.

[0050] The terminator is sodium polysulfide.

[0051] The stabilizer is lead dibasic phosphite.

[0052] A preparation method of EPDM, comprising the steps of:

[0053] (1) take each raw material according to weight component;

[0054](2) Polymerization: Add the third monomer, catalyst, and organic solvent that have been weighed into the reaction kettle that has been replaced with nitrogen in advance, and after fully stirring, feed a mixed gas of ethylene, propyl...

Embodiment 3

[0059] A kind of ethylene propylene diene monomer, comprises following composition by weight:

[0060]

[0061] The third monomer is 1,4-hexadiene (1,4-HD).

[0062] Described vanadium series catalyst is VOCl 3 , the alkylaluminum compound is trichlorodiethylaluminum, the activator is benzenesulfonyl chloride, and the molar ratio of the alkylaluminum compound to the vanadium catalyst is 20; the activator and the vanadium catalyst The molar ratio of the catalyst was 6.

[0063] Described organic solvent is heptane.

[0064] The terminator is sodium nitrite.

[0065] Described stabilizer is dibasic lead stearate.

[0066] A preparation method of EPDM, comprising the steps of:

[0067] (1) take each raw material according to weight component;

[0068] (2) Polymerization: Add the third monomer, catalyst, and organic solvent that have been weighed into the reaction kettle that has been replaced with nitrogen in advance, and after fully stirring, feed a mixed gas of ethylen...

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Abstract

The invention discloses ethylene propylene diene monomer rubber. The ethylene propylene diene monomer rubber comprises the following components in parts by weight: 15-25 parts of ethylene, 25-35 partsof propylene, 45-55 parts of a third monomer, 0.5-1.2 parts of a catalyst, 800-1000 parts of an organic solvent, 0.01-0.03 part of a terminator, 0.005-0.03 part of a stabilizer, and 5-8 parts of white oil. The glass-transition temperature of the obtained ethylene propylene diene monomer rubber is -50 DEG C or below, and excellent low-temperature performance is exhibited. The obtained rubber has high tensile strength and low hardness and exhibits good cold resistant performance.

Description

technical field [0001] The invention relates to the technical field of chemical industry, more specifically, it relates to a EPDM rubber and a preparation method thereof. Background technique [0002] Ethylene propylene rubber is a copolymer synthesized from ethylene and propylene based monomers. Because the main chain of ethylene-propylene rubber is composed of chemically stable saturated hydrocarbons, it has excellent aging resistance such as ozone resistance and weather resistance, and has good chemical resistance, electrical insulation performance, impact elasticity, low temperature performance, low density and high filling. It can be widely used in automotive parts, waterproof materials for construction, wire and cable sheaths, heat-resistant hoses, tapes, automotive seals, lubricant modification and other fields. Because the molecule of EPDM rubber does not contain double bonds, it cannot be vulcanized with sulfur, which limits its application; while EPDM rubber conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L45/00C08L47/00C08L91/00C08F232/08C08F236/20C08F210/02C08F210/06C08F2/38C08F4/68
Inventor 张辉
Owner 宁波爱得智能科技有限公司
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