Special curing agent of 3-element EPR

A technology of EPDM rubber and vulcanizing agent, which is applied in the field of rubber vulcanizing agent to achieve the effects of reducing labor intensity, avoiding weighing errors, and avoiding environmental pollution

Inactive Publication Date: 2006-09-20
戴近禹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of "blooming" of rubber products in the prior art, the present invention provides a special vulcanization machine that not only solves the problem of "blooming" of products, but also improves the vulcanization speed and is applicable to different types of EPDM rubber. agent

Method used

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  • Special curing agent of 3-element EPR

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a. Take sulfur, peroxide, thiazole, thiuram, dithiocarbamate, amine and aldehyde-amine condensate, ethanolamine according to the total weight percentage of 5-60%, 1-50%, 1-70% , 3-50%, 1-50%, 1-25%, 1-25% weighing.

[0032] Sulfur can be used as elemental sulfur or insoluble sulfur.

[0033] Peroxides can be dicumyl peroxide, 1.3-bis(tert-butylperoxydiisopropyl)benzene, 2.5-dimethyl 2.5-(di-tert-butylperoxy)hexane, 4.4'-bis (tert-butylperoxy) n-butyl valerate, 1.4-bis(tert-butylperoxydiisopropyl)benzene.

[0034] Thiazole can be used as 2-mercaptobenzothiazole, dibenzothiazole disulfide, 2-mercaptobenzothiazole cyclohexyl ammonium salt, 1-(N,N-diethylaminomethyl)-2-benzo Thiazolylthiones.

[0035] Thiuram can be used tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutylthiuram disulfide, tetramethylthiuram tetrasulfide, four Sulphide bispentaethylene thiuram, disulfide bispentaethylene thiuram, hexasulfide bispentaethy...

Embodiment 2

[0043] 18 kilograms of 400-mesh high-purity sulfur powder produced in Taiyuan, Shanxi, 23 kilograms of dicumyl peroxide (commodity code DCP) produced in Taicang, Jiangsu, and 1-(N,N-diethylaminomethyl)-2 produced in Russia, 27 kilograms - Benzothiazolylthione (commodity code BTMA), 14 kilograms of tetramethylthiuram tetrasulfide (commodity code Nocceler TRS) newly produced in Ouchi, Japan, 10 kilograms of German Rhein production dibutyl ammonium dithiophosphate (commodity Code name Rhenocure AT), 6 kg of n-butyraldehyde aniline condensate produced by Du Pont of the United States (product code name Accelerator 808), 2 kg of triethanolamine produced by Beijing Chemical Industry No. 15 minutes, and then discharged into a common dry granulator for granulation.

Embodiment 3

[0045] 38 grams of 400-mesh high-purity sulfur powder produced in Taiyuan, Shanxi, 10 grams of dicumyl peroxide (commodity code DCP) produced in Taicang, Jiangsu, and 8 grams of 1-(N,N-diethylaminomethyl)-2 produced in Russia - Benzothiazolyl thione (commodity code BTMA), 9 grams of tetramethylthiuram tetrasulfide (commodity code Nocceler TRS) produced in Ouchi, Japan, 25 grams of German Rhein production dibutyl ammonium dithiophosphate (commodity code name RhenocureAT), 3 grams of n-butyraldehyde aniline condensate produced by Du Pont of the United States (product code name Accelerator 808), and 7 grams of triethanolamine produced by Beijing Chemical Industry No. Minutes, and then discharged into the usual dry granulator for granulation.

[0046] The application effect comparison is as follows:

[0047] 1. Materials

[0048] EPDM512: ENB content 4.3%, DSM Chemicals, Netherlands

[0049] EPDM4045: ENB content 8%, China Jilin Chemical Company

[0050] Zinc Oxide: Dalian Zinc ...

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Abstract

This invention discloses a kind of vulcanizer especially for ethylene propylene diene monomers, which uniquely has a mass-fraction composition as follows: 5~60% sulphur, 1~50% peroxide, 1~70% thiazole, 3~50% thiuram, 1~50% dithiocarbamate, 1~25% amine and condensate of aldehyde and amine and 1~25% ethanolamine. The interaction of coexisting enhancers and vulcanizers is adequately utilized and the amount of enhancers is reasonably controlled within a range for frost spray inhibition. Therefore, the vulcanization speed of ethylene propylene diene monomers can be promoted by almost 30% and frost spray on product surfaces can be well solved, which significantly improves the physical and mechanical properties of the vulcanizate. This invention is applicable for several tens of ethylene propylene diene monomers and there requires no large amount of experimental comparison for a single specie. Therefore, the label strength of the technologists is lowered and the production efficiency is raised.

Description

Technical field: [0001] The invention relates to a rubber vulcanizing agent, in particular to a special vulcanizing agent for EPDM rubber. Background technique: [0002] EPDM rubber is an important synthetic rubber. Because of its oil resistance, heat resistance, aging resistance and good air-tightness, it is widely used in many industries such as automobiles, building materials, wires and cables, especially doors and windows of automobiles and buildings. Sealing strip (document 1), EPDM rubber is an indispensable main material. However, the structural characteristics of EPDM rubber itself determine that its application and processing performance is not ideal, and there are mainly defects such as slow vulcanization speed, poor rubber plasticizing effect and low solubility of rubber to processing aids (Document 2). At present, in order to solve the problem of slow vulcanization speed, 5 to 6 large doses of accelerators and a certain amount of vulcanizing agent are usually ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/34C08F210/10C08K5/47C08K5/39C08K3/06C08K5/17C08K5/40
Inventor 戴近禹
Owner 戴近禹
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