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Flexible one-step silane naturally-crosslinked EPDM cable material and preparation method thereof

A technology of natural cross-linking and method silane, which is applied in the field of wire and cable insulation and sheath materials, soft one-step silane natural cross-linking EPDM cable material and its preparation, which can solve the problem of product instability, high energy consumption and short storage period To achieve reliable extrusion performance and cross-linking degree, simplify the process flow, and stabilize product performance

Active Publication Date: 2012-10-24
中广核三角洲(江苏)塑化有限公司
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AI Technical Summary

Problems solved by technology

[0002] At present, the cross-linking methods of EPDM (ethylene propylene diene monomer) are mainly sulfur vulcanization, peroxide cross-linking or sulfur plus peroxide. These methods are labor-intensive, low production efficiency, unstable products, and must have The vulcanization pipeline can only be completed, the waste of starting and stopping is relatively large, and the vulcanization process wastes energy, so new technologies are urgently needed to complete product replacement
[0003] Some technologies have carried out research on silane cross-linked EPDM. For example, Padanaplast in Italy and AEI in the United Kingdom have developed silane cross-linked EPDM products. They all use polymer copolymerization to directly polymerize silane monomers into the linear chain of EPDM. This process can control the degree of polymerization conveniently, and it is relatively easy to control the reaction point to obtain an ideal cross-linked product, but the disadvantage is that it is difficult to control the parameters of the copolymerization reaction, and there are still active points on the chain after copolymerization that are vulnerable to attack; Type silane cross-linked EPDM cable material technology, this material is divided into A component and B component, because A component is a product after copolymerization of silane, the storage period of the product is short, and B component needs to be granulated separately, which consumes a lot of energy , the cost is high; and components A and B have to be mixed in the wire and cable factory, which brings a lot of trouble to customers
In addition, after cable formation, it is required to undergo boiling or steaming for cross-linking reaction, and a large amount of moisture reduces the electrical properties of the material.

Method used

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  • Flexible one-step silane naturally-crosslinked EPDM cable material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Example 1: Soft one-step silane natural crosslinking EPDM cable material and its preparation method

[0046] One, the preparation of EPDM compound:

[0047] Weigh 70 parts of EPDM (Exxon 2605B) and 30 parts of ethylene-ethyl acrylate copolymer (DuPont 2116), and mix them evenly to obtain the EPDM compound.

[0048] 2. Preparation of catalyst masterbatch:

[0049]Weigh 100 parts of low-density polyethylene (Shanghai Petrochemical Q281), 15 parts of catalyst (di-n-butyltin maleate), 15 parts of antioxidant (antioxidant 1010), metal deactivator (N,N'-bis[ β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine) 10 parts, lubricant (stearic acid) 10 parts, after mixing in a closed high-speed mixer for 20 minutes, in ordinary Extrude and granulate on a twin-screw extruder, dry at 60°C for two hours, and set aside.

[0050] Three, the preparation of cross-linking composite agent:

[0051] Weigh 2 parts of vinyltrimethoxysilane as a coupling agent and 1 part of dicumyl pe...

Embodiment 2 4

[0057] Embodiments 2-4: A kind of flexible one-step silane natural crosslinking EPDM cable material and its preparation method

[0058] 1. The formula of EPDM compound is as follows:

[0059] EPDM EEA Embodiment two 50 copies 50 copies Embodiment Three 60 copies 40 copies Embodiment Four 80 copies 20 copies

[0060] 2. The formula of the catalyst masterbatch is as follows:

[0061] LDPE catalyst antioxidant metal deactivator lubricant Embodiment two 100 copies 4 parts 15 copies 3 copies 13 copies Embodiment Three 100 copies 20 copies 20 copies 5 copies 20 copies Embodiment Four 100 copies 10 copies 5 copies 8 servings 30 copies

[0062] Note: 1. Example 2: Catalyst: 2 parts of di-n-butyltin dilaurate, 2 parts of di-n-octyltin dilaurate; antioxidant: 15 parts of dilauryl thiodipropionate; metal deactivator N, N 3 parts of '-bis[β-(3,5-di-tert-butyl-4-hydroxypheny...

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Abstract

The invention relates to a flexible one-step silane naturally-crosslinked EPDM cable material, and the raw material formula comprises an EPDM compound, a catalyst master batch, and a crosslinking complex agent with a mass ratio of 80-92:5-10:3-10; the preparation method comprises the following steps: mixing the EPDM compound, the catalyst master batch, and the crosslinking complex agent in a mixer for absorption, discharging the mixture after 2-3 hours, packaging to obtain the finished product. The material produced in the invention not only inherits the performance of traditional crosslinkedEPDM cable materials, but also has more flexible performance; the production procedure is simplified; the production cost is reduced; and the limitation of traditional sulfuration technology is broken through.

Description

technical field [0001] The invention relates to a flexible one-step silane natural cross-linked EPDM cable material and a preparation method thereof, belonging to the technical field of wire and cable insulation and sheath materials (cable material for short). Background technique [0002] At present, the cross-linking methods of EPDM (ethylene propylene diene monomer) are mainly sulfur vulcanization, peroxide cross-linking or sulfur plus peroxide. These methods are labor-intensive, low production efficiency, unstable products, and must have The vulcanization pipeline can only be completed, the waste of starting and stopping is relatively large, and the vulcanization process wastes energy. Therefore, new technologies are urgently needed to complete product replacement. [0003] Some technologies have carried out research on silane cross-linked EPDM. For example, Padanaplast in Italy and AEI in the United Kingdom have developed silane cross-linked EPDM products. They all use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/06C08F230/08C08F2/44C08K5/372C08K5/134C08K5/526C08J3/22C08L23/08C08L23/06
Inventor 郭伟杰
Owner 中广核三角洲(江苏)塑化有限公司
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