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Marine plastic pipe and preparation method thereof

A technology of plastic pipes and plastic pipe fittings, which is applied in the field of marine plastic pipes and their preparation, and can solve the problems of occupying limited resources of the country, heavy weight, and restricted applications.

Active Publication Date: 2020-09-01
SHANGHAI ZHONGSU PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water supply and drainage piping system used in the shipbuilding industry has high requirements on the piping system, the pressure must reach 1.6MPa, the temperature must be between -40°C and 95°C, and the service life must reach more than 20 years. Therefore, the current domestic and foreign shipbuilding industries use The water supply and drainage piping system all use steel and copper pipes and pipe fittings. The use of these material pipes and pipe fittings has the following disadvantages: 1. It takes up a lot of limited national resources; 2. Steel and copper materials Pipes and fittings are heavy, difficult to install and process, and have a long construction period. At the same time, the continuous price increase of ferrous and non-ferrous metals increases the cost of the project; Replacement two to three times, use and maintenance cost is high
Generally, reducing the density of polyolefin resin can improve the creep resistance of the material, but the reduction of density will affect the long-term hydrostatic performance of the material; increasing the density of polyolefin, its creep behavior under high temperature conditions, limits the Applications under high temperature conditions
In addition, the long-term creep and stress cracking resistance of marine pipes and fittings are relatively poor, and the flame retardancy problem is relatively large. The general way is to add inorganic flame retardants and organic flame retardants to solve the resistance of pipes and fittings. Flammability, but adding more inorganic flame retardant materials will reduce the mechanical strength of pipes and fittings, and adding less will not achieve better flame retardant effect

Method used

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  • Marine plastic pipe and preparation method thereof
  • Marine plastic pipe and preparation method thereof

Examples

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preparation example Construction

[0073] In the present invention, the preparation method of the polyolefin grafted inorganic filler comprises the following steps:

[0074] (1) The inorganic filler is placed in the plasma generator, and the surface treatment is carried out under the condition that the flow rate of the gas medium is 45-70mL / min and the discharge time is 10-15min;

[0075] (2) Mix the inorganic filler and coupling agent treated in step (1), stir at 50-70°C for 30-80min, then add polyolefin monomer and initiator and mix evenly, and finally extrude through an extruder Granulation for standby, extrusion temperature is 150-300°C.

[0076] In a preferred embodiment, the weight ratio of the inorganic filler, coupling agent, polyolefin monomer and initiator is 100:(1-5):(20-40):(0.01-0.1).

[0077] In a more preferred embodiment, the weight ratio of the inorganic filler, coupling agent, polyolefin monomer and initiator is 100:2:25:0.05.

[0078] In a preferred embodiment, the olefin monomer is a mono...

Embodiment 1

[0131] Example 1 provides a plastic pipe for marine use. The raw materials for the preparation of the plastic pipe include the following components in parts by weight: 81 parts of base resin, 18 parts of filler, 16.2 parts of toughening agent, 1.5 parts of initiator, 8 parts of flame retardant, 2 parts of antioxidant, 2 parts of lubricant.

[0132] The base resin is homopolypropylene, copolypropylene and polybutene with a combined weight ratio of 1:1.2:0.5; the homopolymer polypropylene is selected from ExxonMobil Chemical, ExxonMobil series, model PP2822E2; The polypropylene copolymer is selected from Yanshan Petrochemical, model 4400; the polybutene is selected from Mitsui, Japan, model P5050; the toughening agent is selected from ExxonMobil, EXACT series, model 0203; the initiator It is azobisisobutyronitrile; the antioxidant is 2,6-di-tert-butyl-4-n-butylphenol; the lubricant is polydimethylsiloxane; the filler is polyolefin branch Connected inorganic fillers;

[0133] T...

Embodiment 2

[0144] Embodiment 2 provides a plastic pipe for marine use. The raw materials for the preparation of the plastic pipe include the following components in parts by weight: 50 parts of base resin, 10 parts of filler, 5 parts of toughening agent, 0.1 part of initiator, 1 part of fuel, 0.3 part of antioxidant, 0.2 part of lubricant.

[0145] The base resin is homopolymerized polypropylene, copolymerized polypropylene and polybutene with a combined weight ratio of 1:0.8:0.3; the homopolymerized polypropylene is selected from ExxonMobil Chemical, ExxonMobil series, model PP2822E2; The polypropylene copolymer is selected from Yanshan Petrochemical, model 4400; the polybutene is selected from Mitsui, Japan, model P5050; the toughening agent is selected from ExxonMobil, EXACT series, model 0203; the initiator It is azobisisobutyronitrile; the antioxidant is 2,6-di-tert-butyl-4-n-butylphenol; the lubricant is polydimethylsiloxane; the filler is polyolefin branch Connected inorganic fil...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a plastic pipe and a preparation method and application thereof. The marine plastic pipe is at least prepared from the following components in parts by weight: 50 to 100 parts of a basic resin, 10 to 30 parts of a filler, 5 to 15 parts of a toughening agent, 0.1 to 3 parts of an initiator and 0.5 to 5 parts ofother auxiliary agents. According to the marine plastic pipe and pipe fitting prepared from the marine plastic pipe, through selection and compounding of the basic resin and the toughening agent, theprepared pipe has excellent creep resistance and stress cracking resistance and has excellent toughness and impact resistance under the low-temperature condition; meanwhile, the polyolefin grafted inorganic filler has good compatibility with a system, so that the creep resistance of the pipe is further improved; in addition, through the synergistic flame-retardant effect of graphene and phosphorus, the problems that a flame retardant is easy to separate out and the mechanical property of the pipe is influenced are solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a marine plastic pipe and a preparation method thereof. Background technique [0002] With the development of society and the progress of science and technology, the international and domestic pipeline industry has entered a new period of development. The water supply and drainage piping system used in the shipbuilding industry has high requirements on the piping system, the pressure must reach 1.6MPa, the temperature must be between -40°C and 95°C, and the service life must reach more than 20 years. Therefore, the current domestic and foreign shipbuilding industries use The water supply and drainage piping system all use steel and copper pipes and pipe fittings. The use of these material pipes and pipe fittings has the following disadvantages: 1. It takes up a lot of limited national resources; 2. Steel and copper materials Pipes and fittings are heavy, difficult to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/20C08L23/06C08L23/08C08L83/04C08L51/10C08K5/13C08K9/04C08K9/02C08K3/04C08K7/06C08K3/36C08K3/22C08K5/523
CPCC08L23/14C08L23/06C08L2201/08C08L2203/18C08L2201/02C08L2205/035C08L2205/02C08K2003/2224C08L23/12C08L23/20C08L23/0815C08L83/04C08L51/10C08K5/13C08K9/04C08K9/02C08K3/042C08K7/06C08K3/36C08K3/22C08K5/523Y02A20/20
Inventor 刘志光郑祥义
Owner SHANGHAI ZHONGSU PIPE
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