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Coating used on internal surface of oil pipe for conveying crude oil and petroleum products and preparation method thereof

A oil pipe and coating technology, which is applied in the field of oil pipe inner wall coating and its preparation, can solve the problems of poor adhesion of recoating, poor resistance to high temperature and oily sewage, etc.

Active Publication Date: 2014-08-20
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor resistance to high temperature oily sewage, poor adhesion after fully cured

Method used

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  • Coating used on internal surface of oil pipe for conveying crude oil and petroleum products and preparation method thereof
  • Coating used on internal surface of oil pipe for conveying crude oil and petroleum products and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of Cardanolamine Curing Agent

[0046] The composition of raw materials is calculated in parts by weight: 300 parts of cardanol, 260 parts of diethylenetriamine, 400 parts of formaldehyde (37wt%), 188 parts of phenol, and 350 parts of xylene.

[0047] manufacturing process

[0048] Cardanol, phenol, and diethylenetriamine are put into the reactor, and at 40°C, formaldehyde (37wt%) solution is added dropwise. ℃, dehydration under reduced pressure and cooling to 40 ℃, dilute to 70wt% with xylene to obtain 70wt% cardanol amine curing agent;

[0049] (2) Millbase preparation

[0050] The composition of raw materials is calculated in parts by weight: 105kg of 70wt% cardanolamine curing agent, 140kg of calcined kaolin, 17.5kg of red iron oxide, 14kg of high-viscosity attapulgite, and 73.5kg of xylene; put the raw materials into a high-speed disperser in turn, and stir and mix evenly , filtered, and discharged to obtain a paint slurry.

[0051] (3) Preparat...

Embodiment 2

[0055] (1) Preparation of Cardanolamine Curing Agent

[0056] The composition of raw materials is calculated in parts by weight: 300 parts of cardanol, 312 parts of diethylenetriamine, 235 parts of phenol, 480 parts of formaldehyde (37wt%), and 390 parts of xylene.

[0057] The manufacturing process is the same as in Example 1 to obtain a 70wt% cardanolamine curing agent.

[0058] (2) Millbase preparation

[0059]The composition of raw materials is calculated in parts by weight: 105kg of 70wt% curing agent, 70kg of calcined kaolin, 70kg of microcrystalline powder, 17.5kg of red iron oxide, 14kg of high-viscosity attapulgite, and 73.5kg of xylene. Mix evenly, filter and discharge to obtain the paint slurry.

[0060] (3) Preparation of epoxy resin solution

[0061] 115kg epoxy E-55 and 25kg xylene are mixed and dissolved to obtain epoxy resin solution.

[0062] Lacquer paste and epoxy resin solution are mixed at a weight ratio of 100:40, stirred evenly and used as oil pipe i...

Embodiment 3

[0064] (1) Preparation of Cardanolamine Curing Agent

[0065] The composition of raw materials is calculated in parts by weight: 300 parts of cardanol, 364 parts of diethylenetriamine, 288 parts of phenol, 480 parts of formaldehyde (37wt%), and 400 parts of xylene.

[0066] The manufacturing process is the same as in Example 1 to obtain a 70wt% cardanolamine curing agent.

[0067] (2) Millbase preparation

[0068] The raw material composition is calculated by weight: 105kg of 70% curing agent, 105kg of calcined kaolin, 52.5kg of titanium dioxide, 14kg of high-viscosity attapulgite, and 73.5kg of xylene.

[0069] Put the raw materials into the high-speed disperser in turn, stir and mix evenly, filter, and discharge to obtain the paint slurry.

[0070] (3) Preparation of epoxy resin solution

[0071] 100kg epoxy E-55 and xylene 40kg mix and dissolve to obtain epoxy resin solution.

[0072] Lacquer paste and epoxy resin solution are mixed in a weight ratio of 100:40, stirred ...

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Abstract

The invention relates to a coating used on the internal surface of an oil pipe for conveying crude oil and petroleum products and a preparation method thereof. The coating used on the internal surface of the oil pipe comprises 100 weight portions of epoxy resin as a base material, 90-110 weight portions of a cardanol amine curing agent, 120-180 weight portions of pigment and filler, 12-16 weight portions of an thickening agent and 100-160 weight portions of an organic solvent. The preparation method comprises a preparation of the cardanol amine curing agent, a preparation of the mill base and a preparation of an epoxy resin solution. When using, the mill base is mixed with the epoxy resin solution in proportion, and after uniformly stirring, the mixture is used as the coating used on the internal surface of the oil pipe for coating. The coating is an epoxy anti-corrosion coating with high temperature resistance, oily sewage resistance, and comprehensive chemical resistance, and can be repeatedly coated.

Description

technical field [0001] The invention relates to coating manufacture in the chemical field, in particular to an oil pipe inner wall coating for transporting crude oil and petroleum products and a preparation method thereof. Background technique [0002] Steel pipelines are mainly used for crude oil and various media transported in oil fields and over long distances. The crude oil transported by the oil field contains sewage, which is generally heated, but it will not exceed 80°C. During the installation and maintenance of oil pipelines, the damage and welds should be repaired. [0003] Therefore, the oil pipe inner wall coating should have the properties of high temperature resistance, crude oil resistance and oily sewage resistance. And comprehensive chemical resistance: long-term resistance to 10% sodium hydroxide, 10% sulfuric acid, salt water, methanol and other chemicals. Recoatable. [0004] At present, the anti-corrosion coating applied on the inner wall of the ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08F16L58/04
Inventor 朱锦伟
Owner SHANGHAI HUAYI FINE CHEM CO LTD