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Silane self-crosslinked polyolefin flexible insulation cable material and preparation method thereof

A soft insulation and self-crosslinking technology, applied in the field of polyolefin insulation materials, can solve the problems of inability to use electromechanical equipment and lack of soft characteristics, and achieve the effects of low cost, excellent processing performance, and guaranteed grafting degree.

Active Publication Date: 2013-02-20
JIANGSU DEWEI ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cable material disclosed in the patent has realized the characteristics of self-crosslinking, the insulating material can only be used for a long time at a relatively low temperature (90°C), and it does not have soft properties, so it cannot be used in electromechanical equipment

Method used

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  • Silane self-crosslinked polyolefin flexible insulation cable material and preparation method thereof
  • Silane self-crosslinked polyolefin flexible insulation cable material and preparation method thereof
  • Silane self-crosslinked polyolefin flexible insulation cable material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This example provides a method for preparing silane self-crosslinking polyolefin flexible insulating cable material at 125°C. The raw materials and dosages used are shown in Table 1, wherein:

[0034] The high tensile strength polyethylene resin is bimodal polyethylene produced by Borealis, brand: FB2230, and the melt index is 0.2g / 10min; the Mooney viscosity of EPDM rubber is 25, and the propylene content is 25wt%; ethylene copolymer, the Shore A hardness is 75; the first antioxidant is antioxidant 300, the lubricant is PPA, and the grafting initiator is DCP.

[0035] The vinyl acetate content of the ethylene-vinyl acetate copolymer is 28wt%; the silane crosslinking agent is vinyltrimethoxysilane; the third antioxidant comprises antioxidant 1010 and antioxidant 168 with a weight ratio of 1:1;

[0036] The crosslinking catalyst was dibutyltin dilaurate.

[0037] The preparation method of 125 DEG C silane self-crosslinking polyolefin flexible insulating cable material c...

Embodiment 2

[0042] This example provides a preparation method of silane self-crosslinking polyolefin flexible insulating cable material at 125°C. The raw materials and dosage used are shown in Table 1. The raw materials other than high-strength polyethylene resin and grafting initiator are the same as those in the example. 1 is the same.

[0043] In this example, the selected high-strength polyethylene resin is Exxon's metallocene polyethylene grade: 3518CB, and its melt index is 3.5g / 10min.

[0044] In this example, the grafting initiator is 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (DBPH).

[0045] The preparation process of the silane self-crosslinking polyolefin flexible insulating cable material at 125°C is the same as that in Example 1.

Embodiment 3

[0047]This example provides a method for preparing a 125°C silane self-crosslinking polyolefin flexible insulating cable material. The raw materials and dosage used are shown in Table 1. The raw materials other than the silane crosslinking agent, lubricant and the third antioxidant are all Same as Example 1.

[0048] In this example, the silane crosslinking agent is vinyltriethoxysilane; the lubricant is silicone masterbatch; the third antioxidant includes antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1.

[0049] The preparation process of the silane self-crosslinking polyolefin flexible insulating cable material at 125°C is the same as that in Example 1.

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Abstract

The invention relates to a silane self-crosslinked polyolefin flexible insulation cable material and a preparation method thereof. The cable material comprises a grafting component A and a catalytic component B in a weight ratio of 95:(4-6), wherein the grafting component A comprises the following components in parts by weight: 10-35 parts of high-strength polyethylene resin, 25-55 parts of ethylene-octylene copolymer, 20-65 parts of ethylene propylene diene monomer, 0.1-4 parts of 3-aminopropyltrimethoxysilane, 1-6 parts of silane crosslinking agent, 0.5-1.5 parts of grafting initiator, 0.2-2 parts of lubricant and 0.1-5 parts of first antioxidant; and the catalytic component B comprises the following components in parts by weight: 100 parts of ethylene-vinyl acetate copolymer and / or ethylene-octylene copolymer, 1-5 parts of second antioxidant, 1-10 parts of antioxidant and 1-8 parts of crosslinking catalyst. The cable material provided by the invention has the advantages of excellent temperature tolerance, high softness and high oil resistance, and is applicable to the field of electromechanical devices.

Description

technical field [0001] The invention relates to a polyolefin insulating material applicable to the field of electromechanical equipment, in particular to a silane self-crosslinking polyolefin flexible insulating material, a preparation method thereof and a cable prepared therefrom. Background technique [0002] At present, with the vigorous promotion of the transformation of the national power grid, especially the rural power grid, the acceleration of urbanization, and the improvement of rail transit construction, the demand for high-temperature-resistant soft polyolefin insulation materials for electromechanical equipment is increasing. Such insulating materials are mainly radiation cross-linked polyolefin insulating materials or silane cross-linked polyolefin insulating materials that need to be boiled to achieve cross-linking, both of which have the problem of high cost. [0003] Chinese invention patent application 200810023270.9 discloses a non-boiling silane crosslinke...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08L23/16C08K5/5425C08K5/544C08J3/24H01B3/44
Inventor 张丽本栾珊珊王兴宁陈敏顾金云李小刚
Owner JIANGSU DEWEI ADVANCED MATERIALS
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