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MPP pipe for electric power engineering and production process of MPP pipe

A technology for electric power engineering and pipes, which is applied in the field of MPP pipes for electric power engineering and its production process, which can solve the problems of poor weather resistance and easy aging, and achieve the effects of widening the applicable field, not being easy to break, and preventing expansion and extension

Pending Publication Date: 2022-01-28
HANGZHOU XINLU IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the MPP cable protection tube material provided by this patent is prone to aging under long-term high temperature and pressure conditions, and its weather resistance is poor, which needs to be further improved

Method used

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  • MPP pipe for electric power engineering and production process of MPP pipe
  • MPP pipe for electric power engineering and production process of MPP pipe
  • MPP pipe for electric power engineering and production process of MPP pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of reactive weathering agent:

[0053] Mix 0.1mol 2-(2'-hydroxy-5-methylphenyl)benzotriazole, 20mL methylhydroquinone, 0.1mol triethylamine and 80mL tetrahydrofuran, and stir at 55°C to make 2-(2 '-Hydroxy-5-methylphenyl) benzotriazole is completely dissolved, then add dropwise 50mL THF solution dissolved with 0.1mol methyl malonate chloride, the dropping rate is 3 drops / second, and keep stirring after the dropwise addition After 12 hours, lower to room temperature, add 1M sodium hydroxide solution, adjust the pH of the solution to 10, heat to reflux for 6 hours, stop the reaction, lower to room temperature, adjust the pH of the solution to 6.5 with 1M hydrochloric acid, rotary steam at 50°C, and wash with water Twice, recrystallized with ethanol to obtain a reactive weather resistant agent.

Embodiment 2

[0055] Preparation of reactive weathering agent:

[0056] Mix 0.15mol 2-(2'-hydroxy-5-methylphenyl)benzotriazole, 25mL methylhydroquinone, 0.15mol triethylamine and 80mL tetrahydrofuran, and stir at 55°C to make 2-(2 '-Hydroxy-5-methylphenyl) benzotriazole is completely dissolved, then add dropwise 50mL THF solution dissolved with 0.15mol methyl malonyl chloride, the dropping rate is 3 drops / second, continue to stir after the dropwise addition After 12 hours, lower to room temperature, add 1M sodium hydroxide solution, adjust the pH of the solution to 11, heat to reflux for 6 hours, stop the reaction, lower to room temperature, adjust the pH of the solution to 7 with 1M hydrochloric acid, spin evaporate at 50°C, wash with water Twice, recrystallized with ethanol to obtain a reactive weather resistant agent.

Embodiment 3

[0058] Preparation of azobenzene derivatives:

[0059] Mix 0.1mol 4-hydroxyazobenzene, 0.11mol malonic acid and 70mL tetrahydrofuran evenly, add 0.61g p-toluenesulfonic acid, heat and reflux under stirring for 5h, stop the reaction, filter and dry the crude product with 70mL acetic anhydride Recrystallized twice to obtain azobenzene derivatives.

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Abstract

The invention relates to an MPP pipe for electric power engineering and a production process thereof, and belongs to the technical field of pipes. The MPP pipe comprises the following raw materials: modified PP resin, modified hyperbranched polysiloxane, an antioxidant, a solubilizer, a nucleating agent, a filler, a coupling agent and a master batch. The modified hyperbranched polysiloxane has the characteristics of high branched structure, low melting point, low viscosity and easiness in processing, molecules of the modified hyperbranched polysiloxane consist of hard chains and soft chains, and a long chain segment consisting of an azobenzene chain and a benzamide chain is a crystalline phase at low temperature, so that expansion and extension of cracks in a modified PP resin base material can be prevented, and the low-temperature impact resistance of the MPP pipe is further improved; and a molecular chain of the modified hyperbranched polysiloxane contains a benzotriazole structure, and the benzotriazole structure is connected into hyperbranched polysiloxane molecules in a chemical bond mode, so that the weather resistance and the stability of the weather resistance of the MPP pipe are improved.

Description

technical field [0001] The invention belongs to the technical field of pipes, and in particular relates to an MPP pipe for electric power engineering and a production process thereof. Background technique [0002] MPP pipe is mainly made of modified polypropylene, which has the advantages of high strength, good insulation performance and easy construction. It is widely used in trenchless pipeline construction in the process of urban construction, improving the shortcomings of repeated excavation of urban roads, environmental pollution and affecting urban traffic, and protecting the city environment. However, the existing modified polypropylene has low impact resistance at low temperature, which means that micro-cracks or cracks will occur after being subjected to physical impact at low temperature, causing losses and reducing its practical application value. Therefore, the toughening modification of MPP pipes has been under study. Common toughening modification methods inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L83/04C08G77/388
CPCC08L23/14C08G77/388C08L2201/02C08L2201/08C08L2203/18C08L83/04
Inventor 杨关楼吴君华陈晓君何忠华王景侠
Owner HANGZHOU XINLU IND CO LTD
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