Preparation method of MPP electric power tube with heat resistance

A technology of heat resistance and power pipe, applied in the field of power pipe, can solve the problems of shortening the service life of the pipe, oxidation and brittleness, etc.

Pending Publication Date: 2021-11-05
浙江万吉通信器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Add 2,6-di-tert-butylphenol into the three-necked flask, put paraformaldehyde and catalyst into the Erlenmeyer flask, pour it into the dropping funnel, drop into the three-necked flask to obtain intermediate A, Add bisphenol B and anhydrous potassium carbonate to a three-necked flask, add triethyl phosphite to obtain intermediate B, add intermediate A and a catalyst to a three-necked flask, add intermediate B to obtain an antioxidant, and add The antioxidant solves the problem that the existing MPP power pipe is prone to oxidation and becomes brittle, which shortens the service life of the pipe;

Method used

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  • Preparation method of MPP electric power tube with heat resistance
  • Preparation method of MPP electric power tube with heat resistance
  • Preparation method of MPP electric power tube with heat resistance

Examples

Experimental program
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Effect test

Embodiment 1

[0045] This embodiment is a MPP power tube with heat resistance, and the preparation method of the MPP power tube with heat resistance includes the following process:

[0046] S1: Weigh 60 parts of polypropylene, 10 parts of glass fiber, 4 parts of silane coupling agent, 5 parts of stearic acid, 3 parts of paraffin and 2 parts of antioxidant by weight and mix them evenly to obtain electricity Pipe heat-resistant layer blend;

[0047] S2: Prepare the material for the flame-retardant layer of the power tube;

[0048] S3: Add the power tube heat-resistant layer blend and power tube flame-retardant layer material prepared in S1 and S2 to different silos for drying and preheating, and extrude through a single-screw extruder;

[0049] S4: Double-layer co-extrusion method is used to extrude the heat-resistant layer 1 of the power tube and the flame-retardant layer 2 of the power tube through a single-screw extruder, and the materials are heated, melted, and plasticized by the extrud...

Embodiment 2

[0060] This embodiment is a MPP power tube with heat resistance, and the preparation method of the MPP power tube with heat resistance includes the following process:

[0061] S1: Weigh 60 parts of polypropylene, 10 parts of glass fiber, 2 parts of silane coupling agent, 1 part of stearic acid, 1 part of paraffin and 1 part of antioxidant in parts by weight and mix evenly to obtain electricity Pipe heat-resistant layer blend;

[0062] S2: Prepare the material for the flame-retardant layer of the power tube;

[0063] S3: Add the power tube heat-resistant layer blend and power tube flame-retardant layer material prepared in S1 and S2 to different silos for drying and preheating, and extrude through a single-screw extruder;

[0064] S4: Double-layer co-extrusion method is used to extrude the heat-resistant layer 1 of the power tube and the flame-retardant layer 2 of the power tube through a single-screw extruder, and the materials are heated, melted, and plasticized by the extru...

Embodiment 3

[0075] This embodiment is a MPP power tube with heat resistance, and the preparation method of the MPP power tube with heat resistance includes the following process:

[0076] S1: Weigh 70 parts of polypropylene, 30 parts of glass fiber, 4 parts of silane coupling agent, 5 parts of stearic acid, 3 parts of paraffin and 2 parts of antioxidant by weight and mix them evenly to obtain electricity Pipe heat-resistant layer blend;

[0077] S2: Prepare the material for the flame-retardant layer of the power tube;

[0078] S3: Add the power tube heat-resistant layer blend and power tube flame-retardant layer material prepared in S1 and S2 to different silos for drying and preheating, and extrude through a single-screw extruder;

[0079] S4: Double-layer co-extrusion method is used to extrude the heat-resistant layer 1 of the power tube and the flame-retardant layer 2 of the power tube through a single-screw extruder, and the materials are heated, melted, and plasticized by the extrud...

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Abstract

The invention discloses a preparation method of an MPP power tube with heat resistance, and relates to the field of power tubes, the MPP power tube comprises a power tube heat-resistant layer, a power tube flame-retardant layer and a stress layer, 2, 6-di-tert-butylphenol is added into a three-necked flask, paraformaldehyde and a catalyst are dropwise added into the three-necked flask, an intermediate A is obtained, bisphenol B and anhydrous potassium carbonate are added into the three-neck bottle, triethyl phosphite is added to obtain an intermediate B, the intermediate A and a catalyst are added into the three-neck bottle, the intermediate B is added to obtain the antioxidant, and the problems that an existing MPP electric tube is prone to oxidation embrittlement and does not have the flame retardant property are solved; the material can be decomposed into non-combustible gases such as N2, NO, NO2 and the like at a high temperature, the concentration of combustible matters generated by thermal decomposition of oxygen and polymers in air can be reduced, and nitrogen oxides generated by decomposition can capture free radicals and inhibit a chain reaction of high polymers, so that the flame-retardant purpose is achieved.

Description

technical field [0001] The invention relates to the field of power tubes, in particular to a method for preparing an MPP power tube with heat resistance. Background technique [0002] With the development of urban construction, the promotion and application of trenchless technology is also advancing with the times. Trenchless construction has penetrated into the laying and repair of underground pipelines such as natural gas, upper water, lower water, sewage, electricity and information. In the next few years, it is expected that all the "spider webs" in the air will be buried in the ground, and the underground cables will be used to transmit power. A modified polypropylene (MPP) plastic jacking pipe for non-excavation will be used as a plastic sheath for protecting cables. It is being used in a large number of projects. Compared with the commonly used HDPE pipes, MPP pipes have superior performance. The hot-melt welded joints have good flexibility, high welded joint strength...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L91/06C08K5/526C08K7/14C08K5/09C08L23/06C07F9/145C07D487/04C07F9/6561B32B1/08B32B27/32B32B27/20B32B27/18B32B27/08B32B33/00H02G3/04B29D23/00
CPCC08L23/12C08K7/14C07F9/1412C07F9/145C07D487/04C07F9/6561B32B1/08B32B27/32B32B27/20B32B27/18B32B27/08B32B33/00H02G3/0481B29D23/001C08L2201/02C08L2201/08C08L2203/18B32B2262/101B32B2597/00B32B2307/306B32B2307/3065C08L91/06C08K5/526C08K5/09C08L23/06Y02A30/14
Inventor 陈吉林詹一浪陈志松
Owner 浙江万吉通信器材有限公司
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