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Preparation process of flame-retardant low-density polyethylene

A low-density polyethylene and preparation technology, applied in the field of adhesives, can solve the problems of poor mechanical strength, low heat resistance, poor permeability, etc., achieve good use requirements, excellent flame retardant performance, and meet the effects of flame retardant requirements

Pending Publication Date: 2021-11-12
江苏晶华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are also some disadvantages, such as poor mechanical strength, low heat resistance (use temperature is 80-110°C), poor permeability to water vapor and air, easy to burn, etc.

Method used

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  • Preparation process of flame-retardant low-density polyethylene
  • Preparation process of flame-retardant low-density polyethylene
  • Preparation process of flame-retardant low-density polyethylene

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with specific embodiments.

[0019] This embodiment provides a preparation process of flame-retardant low-density polyethylene, comprising the following steps,

[0020] a. Select 100 parts of ethylene with a purity ≥ 99% as a raw material, add 0.5 to 1 part of a peroxide initiator at a pressure of 100 to 300 MPa and a temperature of 200 to 300 ° C, and carry out a polymerization reaction in a reactor; the materials coming out of the reactor,

[0021] b. Select 100 parts of high-purity polyethylene particles with a melt index of 0.1 to 2.5 g / min from the materials coming out of the reactor, and add them into a twin-screw mixing extruder with a twin-roller temperature of 120°C-130°C, and wait until After the particles are completely melted and covered with rolls, add 10-45 parts of the first flame retardant, 1-23 parts of the second flame retardant, and finally add 0.1-0.2 parts of the initiator for mi...

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Abstract

The invention discloses a preparation process of flame-retardant low-density polyethylene, which is characterized by comprising the following steps: a, selecting 100 parts of ethylene with the purity of more than or equal to 99% as a raw material, adding 0.5-1 part of peroxide initiator, and carrying out polymerization reaction in a reaction kettle under the pressure of 100-300MPa and at the temperature of 200-300 DEG C; and B, selecting 100 parts of high-purity polyethylene particles with the melt index of 0.1-2.5 g / min, adding the high-purity polyethylene particles into a double-screw mixing extruder with the double-roller temperature of 120-130 DEG C, and sequentially mixing, cooling water circulation sample strip forming, sample cutting granulation and drying to obtain the flame-retardant low-density polyethylene. The preparation process of the flame-retardant low-density polyethylene provided by the invention is simple in steps and suitable for industrial production, the flame-retardant low-density polyethylene prepared by improving the process steps is excellent in flame retardance, various properties meet high use requirements, and the flame-retardant requirements and the performance requirements of processed products are met.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a process for preparing flame-retardant low-density polyethylene. Background technique [0002] Low-density polyethylene (LDPE) is a general-purpose synthetic resin used in the processing of films, pipes, injection molded products, wire wraps, and more. The PE protective film, one of the finished products, has the advantages of protecting precision components from pollution, corrosion, scratches, and ensuring smoothness and luster during production, processing, transportation, storage and use, and has been widely used. [0003] LDPE particles use high-purity ethylene as the main raw material. Through the polymerization method of pressure 100-300MPa, temperature 200-300℃ and initiator oxygen or peroxide, plastic additives are added in the molten state, and extruded by a screw granulator. made of grains. [0004] LDPE particles are tasteless, odorless, non-toxic, matte, milky w...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K5/03C08K3/22
CPCC08K5/03C08K3/2279C08L2201/02C08L2207/066C08L23/06
Inventor 杨佳伟李洁周晓南
Owner 江苏晶华新材料科技有限公司
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