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CN-121975394-A - High-temperature-resistant single-component anti-corrosion primer for petroleum pipeline and preparation method thereof

CN121975394ACN 121975394 ACN121975394 ACN 121975394ACN-121975394-A

Abstract

The invention belongs to the field of coatings, and in particular relates to a high-temperature-resistant single-component anti-corrosion primer for petroleum pipelines and a preparation method thereof, wherein the high-temperature-resistant single-component anti-corrosion primer comprises, by weight, 30-40 parts of glycidol amine type epoxy resin, 1-10 parts of glycidol ester type epoxy resin, 5-15 parts of latent curing agent, 1-3 parts of anti-settling agent, 5-10 parts of functional filler and 5-15 parts of organic solvent. According to the invention, through the mutual compounding of the raw materials, the high temperature resistance and the chemical corrosion resistance of the paint film can be improved, and meanwhile, the adhesive force of the paint film can be improved, so that the long-term protection of the petroleum drill rod and the casing pipe is realized.

Inventors

  • TANG HONG

Assignees

  • 恒昌涂料（惠阳）有限公司

Dates

Publication Date
20260505
Application Date
20260302

Claims (9)

  1. 1. The high-temperature-resistant single-component anti-corrosion primer for the petroleum pipeline is characterized by comprising, by weight, 30-40 parts of glycidol amine type epoxy resin, 1-10 parts of glycidol ester type epoxy resin, 5-15 parts of latent curing agent, 1-3 parts of anti-settling agent, 5-10 parts of functional filler and 5-15 parts of organic solvent.
  2. 2. The high temperature resistant single component corrosion resistant primer for petroleum pipelines according to claim 1, wherein the glycidylamine type epoxy resin comprises at least one of 4,4' -diaminodiphenyl methane epoxy resin with a functionality of 3.0-4.0, para-aminophenol epoxy resin with a functionality of 3.0 and m-phenylenediamine epoxy resin.
  3. 3. The high temperature resistant single component corrosion resistant primer for petroleum pipelines according to claim 1, wherein the glycidyl ester type epoxy resin comprises at least one of diglycidyl phthalate, diglycidyl isophthalate.
  4. 4. The high temperature resistant one component corrosion resistant primer for petroleum pipelines according to claim 1, wherein said latent curing agent comprises at least one of 4,4' -diaminodiphenyl sulfone, diaminodiphenyl methane, boron trifluoride ammonium complex.
  5. 5. The high temperature resistant single component corrosion resistant primer for petroleum pipelines according to claim 1, wherein the anti-settling agent comprises at least one of organobentonite, nano silica, polyamide wax.
  6. 6. The high temperature resistant single component corrosion resistant primer for petroleum pipelines according to claim 1, wherein the functional filler comprises at least one of nano barium sulfate, carbon fiber powder, potassium titanate whiskers.
  7. 7. The high temperature resistant single component corrosion resistant primer for petroleum pipelines according to claim 1, wherein the organic solvent comprises at least one of aromatic hydrocarbon solvents, alcohol solvents, ketone solvents.
  8. 8. The high-temperature-resistant single-component corrosion-resistant primer for petroleum pipelines according to claim 1, which is characterized by further comprising 10-30 parts of pigment.
  9. 9. A method for preparing the high temperature resistant single component corrosion resistant primer for petroleum pipelines according to any one of claims 1 to 7, which is characterized by comprising the following steps: S1, adding glycidol amine type epoxy resin, glycidol ester type epoxy resin, a latent curing agent, an anti-settling agent and an organic solvent into a container, and uniformly stirring at 1500-2000 rpm to obtain a material body 1; S2, adding functional filler under stirring at a rotation speed of 800-1200 rpm, and dispersing at a high speed for 20-30 min to obtain a material body 2; s3, grinding the material body 2 to fineness less than or equal to 30 mu m, and discharging to obtain a finished product.

Description

High-temperature-resistant single-component anti-corrosion primer for petroleum pipeline and preparation method thereof Technical Field The invention belongs to the field of coatings, and particularly relates to a high-temperature-resistant single-component anti-corrosion primer for petroleum pipelines and a preparation method thereof. Background With the development of drilling technology, the number of ultra-deep oil wells is continuously increased, the underground environment is extremely severe, and the double challenges of high temperature, high pressure and various corrosive mediums are faced. Taking the deep Tasco 1 well in the dry desert of Xinjiang as an example, the depth reaches 10910 meters, the highest temperature under the well is about 220 ℃ and the pressure reaches 145 megapascals, which puts severe demands on the performance of the coating used for oil pipes and sleeves. At present, the petroleum drill pipe and the casing pipe commonly adopt a matched coating process of primer and finish paint, wherein the primer is responsible for guaranteeing the binding force of the coating and the metal substrate. However, the traditional primer and the traditional mainstream anti-corrosion coating have obvious short plates, namely the traditional organic coating such as epoxy resin, polyurethane and the like is easy to decompose and age at more than 200 ℃ to cause protection failure, the adhesive force is poor, the coating is easy to peel off under the action of thermal cycle or mechanical stress and cannot realize long-term protection, the chemical corrosion resistance is limited, the resistance to acid corrosion medium is weak, penetration corrosion is easy to occur, and further the problems of foaming, cracking, peeling and the like of the coating are caused, so that the service life of equipment is seriously shortened, and the operation efficiency is reduced. Therefore, there is a need to develop an anticorrosive coating with high temperature resistance, strong adhesion, excellent flexibility, impact resistance and chemical corrosion resistance, and to match with an adaptive stepped curing process to improve the durability and service life of the coating in the ultra-deep oil well high-temperature high-pressure corrosion environment. Disclosure of Invention The invention aims to solve the technical problem of providing the high-temperature-resistant single-component anti-corrosion primer for the petroleum pipeline and the preparation method thereof, and the high-temperature-resistant single-component anti-corrosion primer can improve the high-temperature resistance and the chemical corrosion resistance of a paint film and improve the adhesive force of the paint film, so that the long-term protection of petroleum drill pipes and casings is realized. The technical scheme adopted by the invention for solving the problems is as follows: the high-temperature-resistant single-component anti-corrosion primer for the petroleum pipeline comprises, by weight, 30-40 parts of glycidol amine type epoxy resin, 1-10 parts of glycidol ester type epoxy resin, 5-15 parts of latent curing agent, 1-3 parts of anti-settling agent, 5-10 parts of functional filler and 5-15 parts of organic solvent. Through the technical scheme, the glycidylamine type epoxy resin can improve the glass transition temperature of the coating, and the glycidylester type epoxy resin can reduce the viscosity of the coating and improve the adhesive force of the coating. Further, the glycidylamine type epoxy resin comprises at least one of 4,4' -diaminodiphenyl methane epoxy resin with the functionality of 3.0-4.0, para-aminophenol epoxy resin with the functionality of 3.0 and m-phenylenediamine epoxy resin. Through the technical scheme, the selected glycidol amine type epoxy resin has the advantages of multiple functionality, high activity and low viscosity, is high in crosslinking density, high in heat resistance and bonding strength and high in mechanical property and corrosion resistance, and can improve the crosslinking density, heat resistance and corrosion resistance of the paint film prepared by the method. Further, the glycidyl ester type epoxy resin comprises at least one of diglycidyl phthalate and diglycidyl isophthalate. Further, the latent curing agent comprises at least one of 4,4' -diaminodiphenyl sulfone, diaminodiphenyl methane and boron trifluoride ammonium complex. Further, the anti-settling agent comprises at least one of organic bentonite, nano silicon dioxide and polyamide wax. Further, the functional filler comprises at least one of nano barium sulfate, carbon fiber powder and potassium titanate whisker. Further, the organic solvent includes at least one of an aromatic hydrocarbon solvent, an alcohol solvent, and a ketone solvent. Further, the high-temperature-resistant single-component anti-corrosion primer for the petroleum pipeline can further comprise 10-30 parts of pigment. The invention also provides a preparation me