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Insulating oxidation-resistant plastic-coated pipe and preparation method thereof

An oxidation-resistant and plastic-coating technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of easy yellowing and aging, poor toughness of steel pipes, low weather resistance, etc., to avoid the probability of electrochemical corrosion, Effects of improving processability and improving adhesion

Inactive Publication Date: 2021-09-14
陈凡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the epoxy resin-coated steel pipes produced by the prior art have poor toughness, are prone to yellowing and aging, and have low weather resistance
[0003] In order to solve the problem of poor weather resistance of traditional plastic-coated pipes, this patent proposes an insulating and oxidation-resistant plastic-coated pipe and its preparation method. The plastic-coated pipe prepared by this patent has high insulation performance and oxidation resistance at the same time , also has excellent toughness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An insulating and oxidation-resistant plastic-coated pipe mainly includes the following raw material components in parts by weight: 25 parts of aliphatic amine polyether, 100 parts of fluorinated reinforced epoxy resin, 6 parts of mixing additives, and 400 parts of pretreated steel pipes.

[0035] A method for preparing an insulating and oxidation-resistant plastic-coated pipe, the preparation method of the insulating and oxidation-resistant plastic-coated pipe mainly includes the following preparation steps:

[0036](1) In parts by weight, 2 parts of modified rare earth solutions, 39 parts of phosphorus pentoxide mass fractions of 80% polyphosphoric acid aqueous solution, 1.1 parts of 2-[4-(3a, 7a-dihydrogen -1,3-benzoxazol-2-yl)phenyl]-1,3-benzoxazole, 1.2 parts of 2-diphthalic anhydride-1,3 hexafluoropropane, the modified The rare earth solution and the aqueous solution of phosphorus pentoxide polyphosphoric acid with a mass fraction of 85% were mixed uniformly, heat...

Embodiment 2

[0045] An insulating and oxidation-resistant plastic-coated pipe mainly includes the following raw material components in parts by weight: 25 parts of aliphatic amine polyether, 100 parts of fluorinated reinforced epoxy resin, 6 parts of mixing additives, and 400 parts of pretreated steel pipes.

[0046] A method for preparing an insulating and oxidation-resistant plastic-coated pipe, the preparation method of the insulating and oxidation-resistant plastic-coated pipe mainly includes the following preparation steps:

[0047] (1) Dissolve succinic anhydride in anhydrous hydrogen fluoride that is 15 times the volume of succinic anhydride, add it to the electrolytic cell, use nickel as an electrode, and perform electrolytic fluorination at 2°C and a DC voltage of 8V. After 1 hour, remove the lower layer of electrolyte , After removing impurities by basic alumina, sodium sulfite, and cold trap, the product obtained is perfluorinated succinic anhydride; then mix perfluorinated succi...

Embodiment 3

[0054] An insulating and oxidation-resistant plastic-coated pipe mainly includes the following raw material components in parts by weight: 25 parts of aliphatic amine polyether, 100 parts of fluorinated reinforced epoxy resin, 6 parts of mixing additives, and 400 parts of pretreated steel pipes.

[0055] A method for preparing an insulating and oxidation-resistant plastic-coated pipe, the preparation method of the insulating and oxidation-resistant plastic-coated pipe mainly includes the following preparation steps:

[0056] (1) In parts by weight, 2 parts of modified rare earth solutions, 39 parts of phosphorus pentoxide mass fractions of 80% polyphosphoric acid aqueous solution, 1.1 parts of 2-[4-(3a, 7a-dihydrogen -1,3-benzoxazol-2-yl)phenyl]-1,3-benzoxazole, 1.2 parts of 2-diphthalic anhydride-1,3 hexafluoropropane, the modified The rare earth solution and the aqueous solution of phosphorus pentoxide polyphosphoric acid with a mass fraction of 85% were mixed uniformly, hea...

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Abstract

The invention discloses an insulating oxidation-resistant plastic-coated pipe and a preparation method thereof, and relates to the technical field of new materials. The preparation method comprises the specific steps of reacting 2-[4-(3a, 7a-dihydro-3H-indole-2-ethyl) phenyl]-3H-indole with 2-diphthalic anhydride-1, 3-propane hexafluoride, and modifying by using a rare earth solution so as to obtain a polyimide liquid crystal; reacting the prepared perfluorinated succinic anhydride with sodium peroxide, and purifying so as to prepare perfluorinated acyl peroxide; catalyzing by using a sodium hydroxide solution, initiating bisphenol A and epoxy chloropropane to polymerize by using perfluoroacyl peroxide, and then adding polyimide liquid crystal to prepare fluorinated epoxy resin; and carrying out thermal spraying on the pretreated stainless steel pipe by using aliphatic amine polyether, fluorinated epoxy resin, polyimide liquid crystal and a mixed additive, and curing to obtain the insulating oxidation-resistant plastic-coated pipe. The plastic-coated pipe prepared by the preparation method disclosed by the invention has relatively high insulating property and oxidation resistance, and also has extremely excellent toughness.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to an insulating oxidation-resistant plastic-coated pipe and a preparation method thereof. Background technique [0002] Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes, and a layer of plastic anti-corrosion layer is welded on the inner surface of steel pipes (bottom pipes) through spraying, rolling, dipping, and suction processes. Or a steel-plastic composite steel pipe with a plastic anti-corrosion layer welded on the inner and outer surfaces. Plastic-coated steel pipes should have excellent corrosion resistance and relatively small frictional resistance. Epoxy resin coated steel pipe is suitable for the transportation of water supply and drainage, sea water, warm water, oil, gas and other media. However, the plastic-coated epoxy resin steel pipes prepared in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D171/00C09D5/25C09D7/65C09D5/08
CPCC09D163/00C09D7/65C09D5/08C08L2203/18C08L2201/08C08L71/00C08L79/08
Inventor 陈凡
Owner 陈凡
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