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Method for producing slicane cross-linking ethylene-propylene rubber throuth one-step method

A technology of ethylene-propylene rubber and silane cross-linking is applied in the field of one-step silane-cross-linked ethylene-propylene rubber production, which can solve the problems of high labor intensity, poor stability, and high product density, and can reduce labor intensity and improve purity. degree, good product quality

Inactive Publication Date: 2006-12-20
河北新宝丰电线电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The defects in the existing technology are: low productivity, high labor intensity, high product density and high cost, poor quality, large thermal stress and poor stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0059] A. Weigh the reaction raw materials according to the following ratio:

[0060] Ethylene Propylene Rubber 100kg,

[0061] polyethylene 20 kg,

[0062] Compound silane coupling agent 1.5 kg;

[0063] B. Add the above raw materials directly to the extrusion equipment without mixing, the temperature is about 180°C, the pressure is 50bar, and the reaction time is about 14 minutes;

[0064] C. The process conditions of the extruder are:

[0065] The first zone is 150℃~165℃, the second zone is 175℃~185℃, the third zone is 185℃~200℃,

[0066] The fourth zone is 200℃~230℃, the fifth zone is 200℃~230℃, the die head is 200℃~230℃;

[0067] D. Cross-linking is carried out in a humid environment at room temperature.

[0068] E. The formula of compound silane coupling agent is:

[0069] Vinyltrimethoxysilane (VTES) 45 kg,

[0070] 6 kg of dicumyl peroxide (DCP),

[0071] Dibutyltin dilaurate (DBTL) 8 kg,

[0072] Antioxidant (1010) 6 kg,

[0073] PE paraffin 30 kg.

[0074] T...

example 2

[0078] A. Weigh the reaction raw materials according to the following ratio:

[0079] Ethylene Propylene Rubber 100kg,

[0080] Polyethylene 40 kg,

[0081] Compound silane coupling agent 4 kg;

[0082] B. Add the above raw materials directly to the extrusion equipment without mixing. The temperature is about 220°C, the pressure is 56 bar, and the reaction time is 5 minutes.

[0083] C. The process conditions of the extruder are:

[0084] The first zone is 150℃~165℃, the second zone is 175℃~185℃, the third zone is 185℃~200℃,

[0085] The fourth zone is 200℃~230℃, the fifth zone is 200℃~230℃, and the die head is 200℃~230℃;

[0086] D. Cross-linking is carried out in water at about 70°C.

[0087] The rest are the same as Example 1.

example 3

[0089] A. Weigh the reaction raw materials according to the following ratio:

[0090] Ethylene Propylene Rubber 100kg,

[0091] Polyethylene 30 kg,

[0092] Compound silane coupling agent 2 kg;

[0093] B. Add the above raw materials directly to the extrusion equipment without mixing. The temperature is about 200°C, the pressure is 56 bar, and the reaction time is 10 minutes.

[0094] C. The process conditions of the extruder are:

[0095] The first zone is 150℃~165℃, the second zone is 175℃~185℃, the third zone is 185℃~200℃,

[0096] The fourth zone is 200℃~230℃, the fifth zone is 200℃~230℃, and the die head is 200℃~230℃;

[0097] D. Cross-linking is carried out in water at about 60°C.

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Abstract

An one-step process for cross-linking silane with ethylene propylene rubber features that the ethylene propylene rubber, polyolefine and composite silane coupling agent are proportionally extruded at 160-230 deg.C under 40-80 bar for 3-15 min. Its advantages are low density and high productivity and quality.

Description

technical field [0001] The present invention relates to a preparation method of silane cross-linked ethylene-propylene rubber, more particularly to a preparation method of one-step silane cross-linked ethylene-propylene rubber. Background technique [0002] A rubber cable is a flexible cable surrounded by an insulating layer and a jacket layer. Several insulated conductors can be enclosed by a sheath. Such rubber cables usually refer to low or medium voltage cables. The insulation and / or jacket are usually made of natural rubber or ethylene-propylene rubber. [0003] In the prior art, the preparation method of traditional silane crosslinked ethylene-propylene rubber is to mix ethylene-propylene rubber, zinc oxide, calcium stearate, sulfur, accelerator M, accelerator DM, carbon black, TAIC, and DCP in a certain proportion. On the mixer or granulator, various materials are mixed according to a certain proportion and batches at different times to produce rubber strips or granu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08K5/54
Inventor 郑玉朋李金辉曾学忠于恩楼王福志戚景赞
Owner 河北新宝丰电线电缆有限公司