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Color weatherable silane crosslinked polyethylene plastic and application thereof

A polyethylene plastic, silane cross-linking technology, applied in conductors, electrical components, circuits, etc., can solve the problems of heat-absorbing cable temperature rise, unable to meet the needs of power cable development, reduce the use temperature of overhead cables, etc. The effect of carrying capacity

Inactive Publication Date: 2008-03-19
上海新上化高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, although black overhead cables can meet the weather resistance requirements of power cables, the heat absorption of black itself brings a high temperature rise to the cables, which relatively reduces the operating temperature of overhead cables. At the same time, a single black color cannot meet the needs of power cable development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0038] In the embodiment, color masterbatch is prepared like this:

[0039] 70 parts by weight of low-density polyethylene with a melt index of 25 g / min and a density of 0.923, 5 parts by weight of carbon black and 25 parts by weight of zinc white are melt-extruded and pelletized in a twin-screw extruder at 200 ° C. , to obtain a gray masterbatch;

[0040] 95 parts by weight of low-density polyethylene with a melt index of 25 g / mim and a density of 0.923 and 5 parts by weight of phthalocyanine blue are melt-extruded and granulated in a twin-screw extruder at 140°C to obtain a blue masterbatch . The formula is shown in Table 1.

[0041] Table 1

[0042] Color and weather resistance of silane cross

[0043] Preparation:

[0044] Stir and mix polyethylene resin, silane crosslinking agent, initiator, weather resistance additive, metal oxide, color masterbatch, antioxidant, metal deactivator and catalyst at 55°C and 350rpm according to the above ratio, And keep the s...

Embodiment 6～10

[0051] Adopt the same formula and preparation process of Example 1, wherein:

Embodiment 6

[0053] The density of polyethylene resin is 0.9g / cm 3 , the melt index is 0.1g / 10min;

[0054] The weather resistance additive is UVA-3 from Cytec

[0055] The metal oxide is magnesium oxide;

[0056] The silane crosslinking agent is vinyltrimethoxysilane;

[0057] The initiator is 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane;

[0058] The antioxidant is 1010;

[0059] The metal deactivator is bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hydrazine

[0060] The catalyst is dibutyltin dilaurate

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Abstract

The invention provides a silane crosslinked low retraction polyethylene plastic and an application of the same, the components and parts by weight include 100 parts of polyethylene resin, 0.01-3 parts of weather resistant additive, 0.1-20 parts of metal oxide, 0.01-10 parts of color master batch, 0.5-3 parts of silane crosslinked agent, 0.01-1.5 parts of initiator, 0.02-2 parts of antioxidant, 0.05-1 parts of metal passivator and 0.01-5 parts of catalyst. The invention can produce silane crosslinked polyethylene insulating plastics with various colors meeting the weather resistant requires for overhead cable, in particular, the grey product can decrease the acceptance degree of environmental thermal radiation of the cable, increase the current carrying capacity of the overhead cable and meet various needs of different levels of the overhead cable.

Description

technical field [0001] The invention relates to a silane cross-linked polyethylene plastic with color weather resistance and its preparation method and application. Background technique [0002] Power cables can be divided into insulated cables and overhead cables according to the use occasions. The overhead cables are exposed to the atmosphere for a long time and withstand the harsh conditions of the sun and rain for a long time, so they must have weather resistance. [0003] Compared with ordinary polyethylene, cross-linked polyethylene has greatly improved heat resistance, load capacity, non-melting, heat aging resistance, and mechanical properties. At the same time, cross-linked polyethylene has excellent electrical properties and flame It does not produce toxic gas, smog, and does not contain carcinogenic lead stabilizers. XLPE is widely used in the manufacture of insulation and overhead power cables. Polyethylene crosslinking usually has three crosslinking methods: pe...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08J3/24C08K5/57H01B7/295C08K5/3472C08K5/524C08K5/20
Inventor 肖明宇栾振华徐永卫
Owner 上海新上化高分子材料有限公司
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