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Preparation method of rapid silane cross-linked polyethylene special material

A silane cross-linking and polyethylene technology is applied in the field of preparation of special materials for rapid silane cross-linking polyethylene, which can solve the problems of short service life due to secondary pollution and achieve the effect of saving production costs.

Inactive Publication Date: 2009-12-23
尤伟兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional water supply, industrial gas transmission, and oil pipelines generally use galvanized steel pipes. Galvanized steel pipes are inevitably rusted and scaled to cause secondary pollution of water and have a short service life. PPR, HDPE and cross-linked polyethylene have become more popular at present. pipe material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The preparation method of the rapid silane crosslinked polyethylene special material described in the embodiment of the present invention mainly includes the following steps: put 60 parts by weight of polyethylene (Yangzi Petrochemical, 5000S brand) into a high mixer, 35 parts by weight of ethylene- Vinyl acetate copolymer (EVA, Korean 1828 brand), 1.0 parts by weight of vinyltriethoxysilane, 0.5 parts by weight of divinylbenzene, 0.1 parts by weight of dicumyl peroxide, 0.1 parts by weight of chlorine Aluminum chloride, 0.1 parts by weight of antioxidant 1010, and 0.5 parts by weight of polyethylene wax were mixed for 15 minutes to obtain a one-step silane crosslinked polyethylene pipe material. Then it is extruded by a pipe extruder and reacted on-line to obtain a silane cross-linked polyethylene pipe. The main performance parameters of the pipe are: the degree of cross-linking reaches 65% after 24 hours of natural storage at 23°C.

Embodiment 2

[0010] The preparation method of the rapid silane cross-linked polyethylene special material described in the embodiment of the present invention mainly includes the following steps: put 75 parts by weight of polyethylene (Yangzi Petrochemical, 5000S brand) into a high mixer, 20 parts by weight of ethylene- Vinyl acetate copolymer (EVA, Korean 1828 brand), 2.5 parts by weight of vinyltrimethoxysilane, 1.5 parts by weight of divinylbenzene, 1 part by weight of dicumyl peroxide, 0.2 parts by weight of chlorinated Calcium, 0.3 parts by weight of antioxidant 1010, and 2 parts by weight of polyethylene wax were mixed for 15 minutes to obtain a silane crosslinked polyethylene pipe material. Then extruded by the pipe extrusion unit, and through the online reaction, the silane cross-linked polyethylene pipe is obtained; the main performance parameters of the pipe are: the degree of cross-linking reaches 67% after natural storage at 23°C for 24 hours.

Embodiment 3

[0012] The preparation method of the rapid silane crosslinked polyethylene special material described in the embodiment of the present invention mainly includes the following steps: put 90 parts by weight of polyethylene (Yangzi Petrochemical, 5000S brand) into a high mixer, 5 parts by weight of ethylene- Vinyl acetate copolymer (EVA, Korean 1828 brand), 5 parts by weight of vinyltrimethoxysilane, 5 parts by weight of vinylbenzene, 2 parts by weight of benzoyl peroxide, 0.5 parts by weight of calcium chloride, 0.5 parts by weight Antioxidant 1010 in parts by weight and polyethylene wax in 2 parts by weight were mixed for 15 minutes to obtain a silane crosslinked polyethylene pipe material. After being extruded by the pipe extrusion unit, the silane cross-linked polyethylene pipe is obtained through online reaction; the main performance parameters of the pipe are: the degree of cross-linking reaches 72% after natural storage at 23°C for 24 hours.

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Abstract

The invention relates to a preparation method of a rapid silane cross-linked polyethylene special material, the composition of the special material comprises: 60-95 parts by weight of polyethylene, 0-35 parts by weight of ethylene-vinyl acetate copolymer, 1-5 parts by weight of unsaturated silane, 0.1-1 part by weight of water-absorbing agent, 0.5-5 parts by weight of cross-linking assistant agent, 0.1-0.5 part by weight of antioxidant and 0.5-2 parts by weight of lubricant, and the special material is obtained by fully mixing all the raw materials and carrying out granulation by an extruder. The special material is extruded for preparing a pipeline or a cable insulating layer and then placed at room temperature of 23 DEG C for 24 hours, thereby automatically completing the cross-linking process and leading the degree of cross-linking to be above 65%; and the preparation method overcomes the shortcoming that the prior silane cross-linked plastic can only be cross-linked by water boiling under the environment of a warm water pool or a steam room, thereby greatly saving production cost for a manufacturer.

Description

technical field [0001] The invention relates to a method for preparing pipe and cable materials, in particular to a method for preparing a special material for rapid silane crosslinked polyethylene. Background technique [0002] Traditional water supply, industrial gas transmission, and oil pipelines generally use galvanized steel pipes. Galvanized steel pipes are inevitably rusted and scaled to cause secondary pollution of water and have a short service life. PPR, HDPE and cross-linked polyethylene have become more popular at present. pipe material. PPR and HDPE pipes are generally used in occasions where the temperature is below 70°C, and cross-linked polyethylene is generally used for hot fluids that carry higher temperatures. Higher service temperature (above 90°C); patent CN1624038 introduces a room temperature silane cross-linked polyethylene plastic used for wire and cable insulation layers, low-medium-high-density pipes, and its composition includes: polyethylene re...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K13/02C08K5/5425
Inventor 汪根林倪新海刘伯元
Owner 尤伟兴
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