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Easily processed and quickly crosslinked silane crosslinked polyethylene insulating material and preparation method thereof

A technology of cross-linking polyethylene and bi-silane, which is used in organic insulators, plastic/resin/wax insulators, etc., can solve the problems of narrow processing temperature range, corroded equipment, pre-crosslinking, etc. The effect of joint curing and simple processing technology

Active Publication Date: 2011-05-25
上海新上化高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will inevitably cause problems such as large equipment occupancy rate and long product production cycle.
Patent CN101148522A proposes a fast-crosslinking silane crosslinked polyethylene insulating material. The product does not need to be soaked in hot water. It can be placed in the atmosphere at 20°C and 50% humidity for more than 4 days to meet the performance requirements. However, this method uses (Medium) Strong acids such as hydrochloric acid, phosphoric acid, sulfuric acid, etc. are used as catalysts, and long-term use will corrode the equipment and shorten the service life of the equipment
Patent CN1995120A proposes a silane cross-linked polyethylene insulating cable material and its manufacturing method, which can complete cross-linking in 2-3 days under natural conditions without boiling. The range is narrow, generally at 170°C, if the temperature is too low, the plasticization is not good, and if the temperature is too high, it is easy to foam and pre-crosslink

Method used

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  • Easily processed and quickly crosslinked silane crosslinked polyethylene insulating material and preparation method thereof
  • Easily processed and quickly crosslinked silane crosslinked polyethylene insulating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Material A: the density is 0.918g / cm 3 100 parts of polyethylene, 5 parts of ethylene-methyl acrylate copolymer with a mass content of 21.5% of methyl acrylate, 2.5 parts of vinyltriethoxysilane, and 0.15 parts of di-tert-butyl peroxide are passed through a twin-screw extruder Reactive extrusion granulation, drying after cooling to obtain material A;

[0034] Material B: 100 parts of ethylene-acrylic acid copolymer with a mass content of 8.5% of acrylic acid, 4 parts of catalyst dioctyltin dilaurate, 4 parts of white carbon black, antioxidant tetrakis[methyl-β-(3,5-di 2 parts of tert-butyl-4-hydroxyphenyl propionate] pentaerythritol ester, 4 parts of lubricant polyethylene wax, and 2 parts of copper inhibitor. Blending and granulation by a twin-screw extruder, air cooling, and drying to obtain material B.

[0035] Mix according to the ratio of material A: material B = 95:5 to obtain a rapidly cross-linking silane cross-linked polyethylene insulating material. JB / T102...

Embodiment 2

[0037] Material A: the density is 0.920g / cm 3 100 parts of polyethylene, 10 parts of ethylene-methyl acrylate copolymer with a mass content of 9% of methyl acrylate, 4 parts of vinyltriethoxysilane, 2,5-dimethyl-2,5-bis(tert Butyl peroxy) hexane 0.2 part, production technology is with embodiment 1;

[0038] Material B: 100 parts of ethylene-acrylic acid copolymer with a mass content of 9.7% of acrylic acid, 4 parts of catalyst dibutyltin diacetate, 2 parts of white carbon black, antioxidant β-(3,5-di-tert-butyl-4- 1 part of n-octadecyl hydroxyphenyl) propionate, 5 parts of lubricant silicone masterbatch, 3 parts of copper inhibitor. Blending and granulation by a twin-screw extruder, air cooling, and drying to obtain material B. The production process is the same as in Example 1.

[0039] Mix according to the mass ratio of material A: material B = 97: 3 to obtain a rapid cross-linking silane cross-linked polyethylene insulating material. JB / T 10260-2001 standard was used for...

Embodiment 3

[0041] Material A: the density is 0.923g / cm 3 100 parts of polyethylene, 10 parts of ethylene-butyl acrylate copolymers with a mass content of butyl acrylate of 27%, 4 parts of vinyltriethoxysilane, and 0.2 part of dibenzoyl peroxide, the production process is the same as in Example 1 ;

[0042] Material B: 100 parts of ethylene-acrylic acid copolymer with a mass content of 7.0% of acrylic acid, 3 parts of catalyst dibutyltin dilaurate, 4 parts of white carbon black, antioxidant 4,4'-thiobis(6-tert-butyl Base-3-methylphenol) 1 part, lubricant silicone oil 2 parts, copper inhibitor 3 parts. Blending and granulation by a twin-screw extruder, air cooling, and drying to obtain material B. The production process is the same as in Example 1.

[0043] Mix according to the weight ratio of material A: material B = 95:5 to obtain a rapidly cross-linking silane cross-linked polyethylene insulating material. JB / T 10260-2001 standard was used for testing, and the results are shown in Ta...

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Abstract

The invention discloses a preparation method of an easily processed and quickly crosslinked silane crosslinked polyethylene insulating material. The insulating material consists of a material A and a material B, wherein the material A comprises the following components in part by weight: 100 parts of polyethylene, 5 to 15 parts of ethylene-acrylate copolymer, 2 to 5 parts of silane and 0.1 to 0.5 part of initiator; and the material B comprises the following components in part by weight: 100 parts of ethylene-acrylate copolymer, 2 to 5 parts of catalyst, 2 to 10 parts of lubricating agent, 1 to 10 parts of silicon dioxide, 1 to 5 parts of antioxidant and 2 to 5 parts of copper inhibitor. A cable material prepared by the method has high natural crosslinking speed; and the required crosslinking can be achieved at room temperature in 2 to 3 days. Compared with the conventional natural crosslinked product, the material has the advantages of high crosslinking speed, wide processing temperature range, low corrosion to equipment, low probability of foaming and pre-crosslinking and the like, and can be used as the insulating material for wires and cables of 3kv or below.

Description

technical field [0001] The invention relates to a product production technology applicable to low-voltage cable insulation materials. Background technique [0002] Polyethylene has the characteristics of excellent insulation, low temperature resistance, aging resistance, and easy processing, and is a very excellent electrical insulation material. However, it also has disadvantages such as low softening point, poor creep resistance, poor stress crack resistance, and poor short-circuit withstand capability, so its application on wires with high calorific value is limited. The cross-linking method can effectively improve the temperature resistance grade (above 90°C), stress crack resistance, creep resistance, current carrying capacity and other properties of polyethylene, which greatly expands the application range of polyethylene. The cross-linking methods currently adopted mainly include peroxide cross-linking, silane cross-linking and radiation cross-linking. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K5/5425C08K3/36C08F255/02H01B3/44B29B9/06
Inventor 徐晓辉钟伟勤徐永卫
Owner 上海新上化高分子材料有限公司
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