Preparation method of MPP electric power tube with heat resistance

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...

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;

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