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Polymer alloy for manufacturing plastic pipeline insert

A technology for plastic pipes and polymers, which is applied in the field of polymer materials for processing and manufacturing plastic pipe inserts, can solve the problems of not easily meeting the requirements for use, poor dimensional stability, and glass fiber is harmful to health, etc., and achieves good dimensional stability, Good dimensional stability and good water resistance

Inactive Publication Date: 2009-12-09
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this polymer alloy material is that because glass fiber is harmful to people's health, it is not suitable for inserts in water supply pipes, and the dimensional stability of these plastic inserts is very poor, and it is not easy to fail to meet the requirements for use. When the water is supplied to the pipeline, its inserts are affected by thermal expansion and contraction, causing the pipeline to leak
In addition, the polymer alloy material uses polyphenylene sulfide as the base material, and the price of polyphenylene sulfide is relatively expensive, so the cost of producing the polymer alloy material is relatively high, and the price is relatively expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The weight percentages of polymer alloy components used to make plastic pipe inserts are:

[0027] Grafted impact-resistant and heat-resistant polystyrene 55.0%

[0028] 2,6 Dimethyl-1,4 Phenyl Ether 40.0%

[0029] Liquid crystal polymer 1.0%

[0030] Styrene / ethylene-butylene / styrene block copolymer 2.0%

[0031] Grafted low density polyethylene 1.5%

[0032] Polyvinylidene fluoride polymer 0.04%;

[0033] Tetrakis[β-(3,5-di-tert-butyl-4`-hydroxyphenyl)propionic acid]pentaerythritol ester 0.2%;

[0034] Calcium Stearate 0.2%,

[0035] Liquid paraffin 0.15%.

[0036] Preparation of polymer alloys for the manufacture of plastic pipe inserts:

[0037] Firstly, liquid paraffin is separately added to styrene / ethylene-butylene / styrene block copolymer in advance, and then the components are blended, fully mixed evenly, put into an extruder to melt and extrude, and the desired product is prepared. taken polymer alloy.

Embodiment 2

[0039] The weight percentages of polymer alloy components used to make plastic pipe inserts are:

[0040] Grafted high impact strength heat-resistant polystyrene 56.4%

[0041] 2,6 Dimethyl-1,4 Phenyl Ether 35.0%

[0042] Liquid crystal polymer 1.5%

[0043] Styrene / ethylene-butylene / styrene block copolymer 5.0%

[0044] Grafted low density polyethylene 1.2%

[0045]Polyvinylidene fluoride polymer 0.08%

[0046] Tetrakis[β-(3,5-di-tert-butyl-4`-hydroxyphenyl)propionic acid]pentaerythritol ester 0.2%

[0047] Dilaurate Thiodipropionate 0.12%

[0048] Calcium Stearate 0.3%

[0049] Liquid paraffin 0.2%.

[0050] Preparation of polymer alloys for the manufacture of plastic pipe inserts:

[0051] Firstly, liquid paraffin is separately added to styrene / ethylene-butylene / styrene block copolymer in advance, and then the components are blended, fully mixed evenly, put into an extruder to melt and extrude, and the desired product is prepared. taken polymer alloy.

Embodiment 3

[0053] The weight percentages of polymer alloy components used to make plastic pipe inserts are:

[0054] Grafted High Impact Strength Heat Resistant Polystyrene 45%

[0055] 2,6 Dimethyl-1,4 Phenyl Ether 40.0%

[0056] Styrene / ethylene-butylene / styrene block copolymer 8.0%

[0057] Liquid crystal polymer 3.0%

[0058] Grafted low density polyethylene 1.5%

[0059] Polyvinylidene fluoride polymer 1.0%;

[0060] Tetrakis[β-(3,5-di-tert-butyl-4`-hydroxyphenyl)propionic acid]pentaerythritol 0.3%

[0061] Dilaurate Thiodipropionate 0.2%

[0062] Calcium Stearate 0.5%

[0063] Liquid paraffin 0.5%.

[0064] Firstly, liquid paraffin is separately added to styrene / ethylene-butylene / styrene block copolymer in advance, and then the components are blended, fully mixed evenly, put into an extruder to melt and extrude, and the desired product is prepared. taken polymer alloy.

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Abstract

The invention relates to a polymer alloy for manufacturing a plastic pipeline insert. The main components are as follows: 2,6 dimethyl-1, 4 phenylate, grafted thermotolerant polystyrene with high impact strength, liquid crystal polymer, styrene / ethylene- butylene / styrene block copolymer, a little low density polyethylene, and assistant, calcium stearate, liquid paraffin and a little antioxygen which are used for improving the processability of the polymer alloy. The polymer alloy of the invention has the advantages of high thermal distortion temperature, melting point temperature and decomposition temperature, low low temperature brittleness, low and constant mold shrinkage ratio, low intensity, light weight and favorable mechanical property and processability; and the production cost of the plastic pipeline insert processed and produced by the polymer alloy is only one eighth of a copper insert, one sixth of a stainless steel insert and one fifth of a cast iron insert, and the polymer alloy does not suffer rusting, does not cause pollution, can bear the water pressure under 5MPa, can be used for a long time under the conditions of cold and hot water, has the service life of 50 years and has extremely high value of application.

Description

technical field [0001] The invention relates to the processing technology of plastic pipe inserts, and more specifically relates to a polymer material used for processing and manufacturing plastic pipe inserts. technical background [0002] The existing plastic pipe inserts are all metal inserts, such as copper alloy inserts, stainless steel inserts and cast iron inserts, mainly copper alloy inserts. Metal inserts are easy to rust and breed microorganisms during use. Some copper alloy inserts also contain metals such as lead and zinc. When used in tap water pipes, they will pollute water quality and be harmful to human health. When the content of lead, zinc and other metals in the alloy insert is too large, the strength of the insert will be greatly reduced, and the insert will be easily damaged, causing pipeline leakage accidents. Another disadvantage is that the specificity of the metal insert is large and the manufacturing cost is high. [0003] The publication number i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L53/02C08L27/16C08K5/06C08K5/103F16L9/12
Inventor 吴锡吴廷禄魏明兴
Owner CHENGDU UNIV OF INFORMATION TECH