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Heat-resistant polypropylene plastic pipe and preparation method thereof

A polypropylene and plastic pipe technology, applied in the field of plastics, can solve the problems of easy deformation of pipes due to heat, short service life, etc.

Inactive Publication Date: 2020-08-14
马健珂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing plastic pipes are generally used to transport drinking water, chemicals, etc., while pipes with corrosive media mostly use polypropylene plastic pipes, although polypropylene plastic pipes are non-toxic, corrosion-resistant, light in weight, and small in liquid resistance. Advantages, but polypropylene pipes generally have the problems that the pipes are easily deformed by heat and the service life is relatively short

Method used

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  • Heat-resistant polypropylene plastic pipe and preparation method thereof
  • Heat-resistant polypropylene plastic pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 Shown, the preparation method of modified polypropylene is:

[0030] S1. Add 20mmol (3-aminopropyl) triethoxysilane, 20mmol succinic anhydride and 100-150ml solvent DMF into the reaction flask, feed nitrogen gas for 10-15min, replace the air in the reaction flask, and heat to 105 React at -110°C for 1.5-2h, then open the reaction bottle, add 0.1-0.2g of acid catalyst p-toluenesulfonic acid and zinc chloride, feed nitrogen again for 10-15min, raise the temperature to 150-160°C, and reflux for 2-3h , after the reaction, naturally cool to 75-80°C, add 50-70ml of deionized water, stir for 1.5-2h, naturally cool to room temperature, separate liquids, the organic phase is decompressed and the solvent is recovered to obtain intermediate A1; The rate is 92.7%;

[0031] S2, add 10-11mmol allyltrimethoxysilane and 100ml absolute ethanol in the reaction bottle, after stirring and dissolving, add the 10mmol intermediate A1 prepared in the first step, put the reac...

Embodiment 2

[0035] The invention is a heat-resistant polypropylene plastic pipe, comprising the following raw materials in parts by weight: 120g of modified polypropylene, 30g of filler, 2g of stabilizer, 3g of plasticizer, and 5g of antioxidant;

[0036] Described filler is carbon black;

[0037] Described stabilizer is sodium stearate;

[0038] Described plasticizer is dioctyl phthalate;

[0039] Described antioxidant is antioxidant 168;

[0040] The preparation method of the heat-resistant polypropylene plastic pipe specifically comprises the following steps:

[0041] The first step is to add modified polypropylene, fillers, stabilizers, plasticizers, and antioxidants into the high-speed mixer, and pre-mix at a temperature of 50°C for 25 minutes;

[0042] The second step is to put the pre-mixed raw materials into a screw extruder, melt and extrude them at a temperature of 190-250°C, and cut them after setting the shape to obtain heat-resistant polypropylene plastic pipes.

Embodiment 3

[0044] The invention is a heat-resistant polypropylene plastic pipe, which comprises the following raw materials in parts by weight: 140g of modified polypropylene, 40g of filler, 3g of stabilizer, 5g of plasticizer, and 2g of antioxidant;

[0045] Described filler is carbon black;

[0046] Described stabilizer is sodium stearate;

[0047] Described plasticizer is di-n-octyl phthalate;

[0048] Described antioxidant is antioxidant 168;

[0049] The preparation method of the heat-resistant polypropylene plastic pipe specifically comprises the following steps:

[0050] The first step is to add modified polypropylene, fillers, stabilizers, plasticizers, and antioxidants into the high-speed mixer, and pre-mix at a temperature of 50°C for 25 minutes;

[0051] The second step is to put the pre-mixed raw materials into a screw extruder, melt and extrude them at a temperature of 190-250°C, and cut them after setting the shape to obtain heat-resistant polypropylene plastic pipes.

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Abstract

The invention discloses a heat-resistant polypropylene plastic pipe and a preparation method thereof. The polypropylene plastic pipe is prepared from the following raw materials in parts by weight: 120 to 140 parts of modified polypropylene, 25 to 40 parts of a filler, 2 to 4 parts of a stabilizer, 3 to 5 parts of a plasticizer and 2 to 5 parts of an antioxidant. The modified polypropylene is prepared in a graft copolymerization manner; firstly, a modifier A2 is prepared and carbon-carbon double bonds are reserved in the modifier A2; the modifier A2 is added into a grafting reaction of polypropylene for copolymerization to obtain modified polypropylene. Organic silicon and amide functional groups are connected in a chemical bond manner; an amide bond has relatively high bond energy; Si-O bonds have good thermal stability, although organosilicon has low surface tension, organosilicon is connected to polypropylene in a chemical bond mode, and therefore the compatibility problem of organosilicon is solved, the high temperature resistance of polypropylene is greatly improved, good thermal stability is achieved, and the heat resistance and weather resistance of the polypropylene plasticpipe can be maintained for a long time.

Description

technical field [0001] The invention belongs to the technical field of plastics, and in particular relates to a heat-resistant polypropylene plastic pipe and a preparation method thereof. Background technique [0002] Polypropylene is a thermoplastic resin obtained by polymerizing propylene. It is a white waxy material with a transparent and light appearance. The melting point is 165°C, it softens at about 155°C, and its operating temperature range is -30-140°C. It can resist the corrosion of acids, alkalis, salt solutions and various organic solvents below 80°C, and can decompose under high temperature and oxidation. [0003] Plastic pipe refers to the general term for pipes made of plastic materials; plastic pipes have the characteristics of light weight, sanitation and safety, small water flow resistance, energy saving, metal saving, improvement of living environment, long service life, safety and convenience, etc. In the past 10 years, driven by the rapid development of ...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08K13/02C08K3/04C08K5/098C08K5/12C08K5/526C08F255/02C08F230/08
CPCC08F255/02C08K3/04C08K5/098C08K5/12C08K5/526C08K13/02C08L2201/08C08L2203/18C08F230/08C08L51/06
Inventor 马健珂丁贤麟刘永利
Owner 马健珂
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