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Wax deposition preventing organic paint and preparation method of organic coating containing it

An organic coating and organic coating technology, which is applied in the preparation of organic coatings and the field of anti-wax organic coatings, can solve the problems of weak surface hydrophilicity, high cost, and expensive polyvinylidene fluoride, and achieve enhanced oil delivery and oil storage capacity, improve oil output capacity, and shorten curing time

Active Publication Date: 2011-12-07
北京碧海云智新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 200310119091.2 discloses "a preparation method of oil well pipe anti-corrosion, anti-scaling and anti-wax paint", which provides an epoxy-modified acrylic resin. Acrylic esters contain ester bonds, which are generally unstable to acid and alkali. The application in anti-corrosion oil pipelines is not ideal, and although the epoxy coating is smooth, its surface hydrophilicity is weaker than that of steel pipes, so its anti-wax effect is not obvious
The polyvinylidene fluoride used in the organic coating is expensive and costly, and the curing time of polyurethane is long, and the three-dimensional coating on the inner wall of the pipe is prone to sag phenomenon, so that the protrusions on the surface after curing will cause more serious wax deposition

Method used

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  • Wax deposition preventing organic paint and preparation method of organic coating containing it
  • Wax deposition preventing organic paint and preparation method of organic coating containing it
  • Wax deposition preventing organic paint and preparation method of organic coating containing it

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preparation example Construction

[0059] At the same time, in a typical embodiment of the present invention, there is also provided a method for preparing an anti-waxing organic coating, which includes the following steps: preparing the above-mentioned organosilicon polyaspartic acid having the structure in the structural formula (1) Ester; The prepared silicone polyaspartate and isocyanate are mixed and stirred uniformly to form the anti-waxing organic coating of the present invention, and the anti-waxing organic coating is uniformly coated to form an organic coating. The organic coating provided by the invention does not sag, can be leveled, and has the effects of high surface smoothness and flatness. At the same time, it has low surface energy, good stain resistance, high temperature resistance, and has a good effect of preventing wax formation and reducing drag.

[0060] In the preparation method of the above-mentioned anti-waxing organic coating, the preparation of silicone polyaspartate includes the followi...

Embodiment 1

[0063] Example 1 (The molar ratio of the linear amino-terminated polysiloxane to the side chain amino-containing polysiloxane is 9:1)

[0064] Raw materials: 1728g linear amino-terminated polysiloxane; 15452g side-chain amino-terminated polysiloxane; 3612g diethyl maleate; 2334g isocyanate curing agent isophorone diisocyanate with a functionality of 2; flow Ping agent 447g.

[0065] Among them, in the linear amino-terminated polysiloxane, R′ is methyl; R″ is methyl; n is 1; the chemical structure is as follows:

[0066]

[0067] In the side chain amino-containing polysiloxane, m is 200.; k is 3; P is 5; the chemical structure is as follows:

[0068]

[0069] Preparation:

[0070] Preparation of organosilicon polyaspartate: Put straight-chain amino-terminated polysiloxane and side-chain amino-containing polysiloxane into a three-neck reactor with a reflux device containing 6653g xylene. Slowly stir the system uniformly and heat up to 60°C, add diethyl maleate dropwise at a constant sp...

Embodiment 2

[0072] Example 2 (The molar ratio of the linear amino-terminated polysiloxane to the side chain amino-containing polysiloxane is 1:9)

[0073] Raw materials: linear amino-terminated polysiloxane 14918g; side chain amino-containing polysiloxane 2394g, diethyl maleate 1892g; functionality 3 isocyanate curing agent (Bayer's DESMODURN3300) 3179g; leveling Agent 391g.

[0074] Among them, in the linear amino-terminated polysiloxane, R′ is methyl; R″ is methyl; n is 200; the chemical structure is as follows:

[0075]

[0076] In the side chain amino-containing polysiloxane, m is 1; k is 1; P is 1. The chemical structure is as follows:

[0077]

[0078] Preparation of organosilicon polyaspartate: Put straight-chain amino-terminated polysiloxane and side chain amino-containing polysiloxane into a three-neck reactor with a reflux device containing 5464 g of xylene. Slowly stir the system uniformly and heat up to 60°C, add diethyl maleate dropwise, drip in 1.5 hours, keep at 60°C for 4 hours, ...

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Abstract

The invention discloses wax deposition preventing organic paint and a preparation method of an organic coating containing it. The wax deposition preventing organic paint comprises an organosilicon polyaspartic ester with a structure shown in formula (1) and isocyanate. In formula (1), R is an alkane group, and when X represents -R'-[SiR"20] nSiR"2-R'-, Y represents H; or, when X is -(CH2)P-, Y represents the wax deposition preventing organic paint provided in the invention. With reduced raw material cost and shortened curing time during the forming of an organic coating from organic paint, the wax deposition preventing organic paint of the invention can form an organic coating with good stability and low surface energy. And the surface of a sucker rod and the inner walls of an oil pipeline and an oil container in crude oil extraction can be coated with the wax deposition preventing organic coating, so that the oil delivery capacity of an oil well can be improved during crude oil extraction and the service life of an oil pumping unit is prolonged. Structural formula (1) is shown below.

Description

Technical field [0001] The invention relates to the field of anti-waxing treatment for oil pipelines, in particular to a preparation method of an anti-waxing organic coating and an organic coating including the same. Background technique [0002] Most of the crude oil produced in my country is high-viscosity, easy to condense, and high wax content crude oil. Generally, the wax content is 15% to 25%, and some even reach more than 40%. For high waxy crude oil, during the process of oil exploitation, storage and transportation, due to changes in temperature, pressure and other conditions, wax and gum will be precipitated in large quantities from the crude oil and deposited on the surface of the sucker rod of the downhole device and the oil pipeline and Wax formation on the inner wall of the oil storage container is very serious. In the aspect of crude oil extraction, the oil production capacity of oil wells is reduced and the life of the pumping unit is reduced; in the aspect of cr...

Claims

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Application Information

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IPC IPC(8): C09D183/10C08G77/452
Inventor 刘小平邸建军李依璇赖广森
Owner 北京碧海云智新材料技术有限公司
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