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Organosilane crosslinked polyethylene

A technology of silane cross-linking and polyethylene, applied in the field of silane cross-linking polyethylene, can solve the problems of affecting product performance and increasing product cost

Inactive Publication Date: 2012-12-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it will not only affect the performance of the product, but also lead to an increase in the cost of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] (1) Preparation of "grafted component":

[0031] Mix the polyethylene resin, alkenyl alkoxysilane and free radical initiator according to the ratio mentioned above, place it in a closed container for at least 12 hours, add it to a blending equipment such as an extruder, melt graft and granulate, and obtain "grafted components", which are dried and sealed for future use,

[0032] Among them, the temperature of each part of the extruder is set as follows: the temperature of the feeding section is 120 ° C ~ 180 ° C, the temperature of the compression section is 180 ° C ~ 200 ° C, the temperature of the homogenization section is 140 ° C ~ 200 ° C, the nozzle mouth The temperature of the mold part is 120 ℃ ~ 160 ℃;

[0033] (2) Preparation of "Crosslinking Catalyst Component":

[0034] Mix polyethylene resin, cross-linking catalyst and antioxidant uniformly according to the ratio mentioned above, add them into extruder and other blending equipment to melt and granulate to ...

Embodiment 1

[0041] (1) Preparation of polyethylene resin component A (abbreviated as "grafted component A") grafted with alkenyl alkoxysilane:

[0042] Mix 100 parts by weight of LLDPE {its melt flow rate is 2.0g / (10min, 2.16kg)}, 1.0 parts by weight of vinyltrimethoxysilane and 0.05 parts by weight of dicumyl peroxide , placed in a closed container for at least 12 hours, put into a twin-screw extruder to melt and react to extrude to obtain "grafted component A", which is dried at 80°C and sealed for future use.

[0043] Among them, the temperature of each part of the twin-screw extruder is set as follows: the temperature of the feeding section is 170°C, the temperature of the compression section is 180°C-200°C, the temperature of the homogenization section is 160°C-190°C, the die The temperature of the part is 150°C;

[0044] (2) Preparation of crosslinking catalyst component A (abbreviated as "crosslinking catalyst component A"):

[0045] 100 parts by weight of LLDPE {its melt flow ra...

Embodiment 2

[0051] (1) Preparation of "grafted component B":

[0052] 100 parts by weight of LLDPE {its melt flow rate is 2.0g / (10min, 2.16kg)}, 1.5 parts by weight of vinyltriethoxysilane and 0.10 parts by weight of dicumyl peroxide are mixed Evenly, put it in a closed container for at least 12 hours, put it into a twin-screw extruder for melt reaction and extrusion, and obtain "grafted component B", which is dried at 80°C and sealed for future use.

[0053] Among them, the temperature of each part of the twin-screw extruder is set as follows: the temperature of the feeding section is 170°C, the temperature of the compression section is 180°C-200°C, the temperature of the homogenization section is 160°C-190°C, the die The temperature of the part is 150°C;

[0054] (2) Preparation of "Crosslinking Catalytic Component B":

[0055] 100 parts by weight of LLDPE {its melt flow rate is 2.0g / (10min, 2.16kg)}, 2 parts by weight of dibutyltin laurate, and 2 parts by weight of tetrakis [β-(3, 5...

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Abstract

The invention relates to organosilane crosslinked polyethylene, which is prepared by a room temperature cross-linking method. The organosilane crosslinked polyethylene mainly comprises 100 parts by weight of polyethylene resin component grafted by alkenyl alkoxy silane, 2 to 8 parts by weight of cross-linking catalyst component, and 0.01 to 0.5 parts by weight of a water producing agent, and is obtained by mixing the components at a temperature between 120 DEG C and 200 DEG C, and then cross-linking the mixed components at a room temperature, wherein the water producing agent is alum or a mixture composed of alum and the existing water producing agent. The organosilane crosslinked polyethylene provided by the invention is low in cost and high in quality, and has commercial value.

Description

technical field [0001] The invention relates to a silane cross-linked polyethylene, in particular to a silane cross-linked polyethylene prepared by "room temperature cross-linking method". Background technique [0002] Silane cross-linked polyethylene is widely used in wire and cable insulation materials, heat shrinkable products, encapsulation films, conductive functional materials, thermal and chemical pipes and other fields. [0003] Early silane cross-linked polyethylene usually needs to be boiled in warm water or steam for 6-12 hours after being cabled or piped, or 15-20 days under natural conditions to complete the cross-linking (CN 1178226A). This will greatly reduce the production efficiency of the silane cross-linked polyethylene and lead to an increase in the cost of the silane cross-linked polyethylene. [0004] Chinese patent CN 1624038A provides a method for preparing silane cross-linked polyethylene at room temperature, which improves the relatively complicate...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08L51/00C08L29/04C08K13/02C08K3/30C08K5/09C08K3/22C08F255/02
Inventor 李秋影陈甜斌吴驰飞史鹏伟郭卫红许海燕
Owner EAST CHINA UNIV OF SCI & TECH
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