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A kind of flame-retardant polyethylene product and its preparation method

A technology of polyethylene and flame retardancy, which is applied in the field of preparation of flame retardant polyethylene, can solve the problems of large amount of flame retardant added, increase production cost, etc., and achieve the effect of high catalytic efficiency

Active Publication Date: 2020-07-03
QINGDAO YANKANG PLASTIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Common polyethylene uses inorganic flame retardants or a combination of inorganic flame retardants and organic flame retardants for flame retardancy, which is easy to cause a large amount of flame retardants and increase the production cost of PE.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] (1) 55kg of high-density polyethylene, 6kg of ethylene-vinyl acetate copolymer, 5.5kg of crosslinking agent, 3kg of methylvinyldiethoxysilane, 4kg of antioxidant 1010, 2kg of catalyst, diethylene glycol 3kg of dibenzoate, 0.3kg of compatibilizer are mixed evenly, and it is made according to the processes of raw material drying, batching, mixing, kneading, cooling and stretching, and pelletizing, especially the mixing process in twin-screw extrusion In the process of extruding, it is necessary to ensure that the head pressure of the twin-screw extruder is not less than 3Mpa, the screw speed is 180 rpm, the exhaust vacuum is not greater than 0.05, and the temperature of the six-stage barrel is between 175-225°C. The temperature of the section cylinder is 175°C, 195°C, 205°C, 215v, 235°C, and 225°C respectively, and the flame-retardant polyethylene products are obtained.

[0019] The preparation method of the compatibilizer is as follows: add 0.5 mol of pentaerythritol and...

example 2

[0023] The preparation process is as follows: high-density polyethylene 70Kg, ethylene-vinyl acetate copolymer 8Kg, crosslinking agent 8.4Kg, bis-(γ-triethoxysilylpropyl) tetrasulfide 6Kg, antioxidant 1076 7Kg, 4Kg of catalyst, 5Kg of triethylene glycol dibenzoate, 0.5Kg of compatibilizer, mixed evenly, and made according to the processes of raw material drying, batching, mixing, kneading, cooling and stretching, and pelletizing In particular, the mixing process is carried out in a twin-screw extruder. It is necessary to ensure that the head pressure of the twin-screw extruder is not less than 3Mpa, the screw speed is 180 rpm, the exhaust vacuum is not greater than 0.05, and the six-stage material The barrel temperature is between 175°C and 225°C, and the six barrel temperatures are respectively 175°C, 195°C, 205°C, 215v, 235°C, and 225°C to obtain flame-retardant polyethylene products.

[0024] The preparation method of the compatibilizer is as follows: add 0.5 mol of pentaer...

example 3

[0028] A preparation method of flame-retardant polyethylene products, the preparation process is as follows: 62.5Kg of high-density polyethylene, 7kg of ethylene-vinyl acetate copolymer, 7.0kg of crosslinking agent, 4.5kg of vinyltrimethoxysilane, Antioxidant 264 is 5.5kg, catalyst 3kg, diethylene glycol dibenzoate 4kg, compatibilizer 0.4kg and mix evenly, according to raw material drying, batching, mixing and stirring, kneading, cooling stretching, pelletizing It is produced by several processes, especially the mixing process is carried out in a twin-screw extruder. It is necessary to ensure that the head pressure of the twin-screw extruder is not less than 3Mpa, the screw speed is 180 rpm, and the exhaust vacuum is not greater than 0.05 The temperature of the six-stage barrel is between 175-225°C, and the temperatures of the six-stage barrel are respectively 175°C, 195°C, 205°C, 215°C, 235°C, and 225°C to obtain flame-retardant polyethylene products.

[0029] The preparation...

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Abstract

The invention relates to a flame-retardant polyethylene product and a preparation method thereof. 55 to 70 parts of high-density polyethylene, 6 to 8 parts of ethylene-vinyl acetate copolymer, 5.5 to8.4 parts of cross-linking agent, 3 to 6 parts of coupling agent, 4 to 7 parts of antioxidant, 2 to 4 parts of catalyst, 3 to 5 parts of plasticizer and 0.3 to 0.5 parts of compatilizer are uniformlymixed, the flame-retardant polyethylene product is prepared according to the steps of material drying, batching, agitation, mixing, cooling and drawing and pelletization, in particular, the step of mixing is carried out in a double-screw extruder, the head pressure of the double-screw extruder is not less than 3Mpa, the rotational speed of screws is 180 rotations per minute, the exhaust vacuum degree is not higher than 0.05, the temperatures of six sections of barrels are between 175 DEG C and 225 DEG C, the temperature of the six sections of barrels is respectively 175 DEG C, 195 DEG C, 205 DEG C, 215 DEG C, 235 DEG C and 225 DEG C, and thereby the flame-retardant polyethylene product is obtained.

Description

technical field [0001] The invention relates to a preparation method of polyethylene, in particular to a preparation method of flame-retardant polyethylene. Background technique [0002] Polyethylene (PE) is one of the five general-purpose plastics. Its output and consumption rank first among all kinds of synthetic resins, and it is widely used in industry, agriculture and daily life. However, polyethylene has poor high temperature resistance. Mechanical properties and chemical resistance can sometimes not meet the requirements of actual use. Therefore, the modification of polyethylene has always been the key to the development and application of polyethylene products, and polyethylene crosslinking technology is an important technology to improve its material properties. The performance of polyethylene modified by cross-linking can be greatly improved, not only significantly improving the comprehensive properties of polyethylene, such as mechanical properties, environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L83/04C08K5/00C08K5/54C08K5/134C08K5/526C08K5/13C08K5/04C08J3/24
CPCC08J3/246C08J2323/06C08J2423/08C08L23/06C08L2201/02C08L2205/03C08L2205/08C08L2207/062C08L2312/00C08L23/0853C08L83/04C08K5/00C08K5/5406C08K5/1345C08K5/526C08K5/13C08K5/04
Inventor 夏和义
Owner QINGDAO YANKANG PLASTIC MACHINERY
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