Application of Solvent-free Two-component Epoxy Coatings in Pipeline Coating and Anticorrosion

An epoxy coating, two-component technology, applied in the field of coatings, can solve problems such as weak adhesion, achieve the effect of improving initial adhesion and durable adhesion, and improving the quality of joint anticorrosion

Active Publication Date: 2016-10-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of weak adhesion between the existing solvent-free two-component epoxy coating and the three-layer polyethylene anti-corrosion coating, the embodiment of the present invention provides a solvent-free two-component epoxy coating for jointing of pipelines For anti-corrosion applications, the solvent-free two-component epoxy coating contains an aliphatic chain structure with a length of about 36 carbon atoms. By heating at high temperature, the long aliphatic chain in the epoxy coating and the long aliphatic chain in the three-layer polyethylene The chains are entangled in the molten state, so that fusion bonding is formed between the epoxy paint coating and the three-layer polyethylene anti-corrosion coating, and the bond between the joint coating and the three-layer polyethylene coating is improved. The cohesive force between them ensures that the long-term high cohesive force between the anti-corrosion coatings in the joint joint area of ​​the pipeline meets the long-term service needs of buried long-distance pipelines

Method used

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  • Application of Solvent-free Two-component Epoxy Coatings in Pipeline Coating and Anticorrosion

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Embodiment 1

[0040] The embodiment of the present invention provides a solvent-free two-component epoxy coating for jointing anticorrosion, the epoxy coating is composed of A component and B component, and the A component and the B component The weight ratio is: 100:15; the composition and weight percentage of the A component are: bisphenol A epoxy resin (trade name E51) 15%, novolac epoxy resin (trade name F51) 20%, butyl Glycidyl ether 5%, fatty acid modified polyester dispersant (EFKA6230) 0.3%, polysiloxane defoamer (Deqian 6800) 0.8%, polysiloxane leveling agent (EFKA3239) 0.6%, trimer Aluminum dihydrogen phosphate 15%, carbon black 0.3%, mica powder 13%, talcum powder 15%, barium sulfate 15%; the composition and weight percentage of the B component are: polyamide (purchased from: American Air Chemicals ; product model: Ancamide2353) 25%, phenalkamine (purchased from: American Air Chemicals; product model: Ancamide2724) 50%, trimethylhexamethylene hexamethylenediamine 25%.

Embodiment 2

[0042] The embodiment of the present invention provides a solvent-free two-component epoxy coating for jointing anticorrosion, the epoxy coating is composed of A component and B component, and the A component and the B component The weight ratio is: 100:25; the composition and weight percentage of the A component are: bisphenol A epoxy resin (trade name E51) 35%, novolac epoxy resin (trade name F51) 5%, benzene Glycidyl ether 12%, fatty acid modified polyester dispersant (EFKA6230) 0.6%, polysiloxane defoamer (Deqian 6800) 0.7%, polysiloxane leveling agent (EFKA3239) 0.5%, trimer Aluminum dihydrogen phosphate 10%, carbon black 0.2%, mica powder 10%, talc powder 15%, barium sulfate 11%; the composition and weight percentage of the B component are: polyamide (purchased from: American Air Chemicals ; product model: Ancamide2643) 50%, phenalkamine (purchased from: American Air Chemicals; product model: Ancamide2724) 35%, triethylenetetramine 15%.

Embodiment 3

[0044] The embodiment of the present invention provides a solvent-free two-component epoxy coating for jointing anticorrosion, the epoxy coating is composed of A component and B component, and the A component and the B component The weight ratio is: 100:50; the composition and weight percentage of the A component are: bisphenol A epoxy resin (trade name E51) 35%, novolac epoxy resin (trade name F51) 15%, propylene Glycidyl ether 5%, fatty acid modified polyester dispersant (EFKA6230) 0.3%, polysiloxane defoamer (Deqian 6800) 0.8%, polysiloxane leveling agent (EFKA3239) 0.6%, trimer Aluminum dihydrogen phosphate 10%, carbon black 0.3%, mica powder 8%, talcum powder 15%, barium sulfate 10%; the composition and weight percentage of the B component are: polyamide (purchased from: American Air Chemicals ; product model: Ancamide2643) 75%, phenalkamine (purchased from: American Airline; product model: Ancamide2724) 20%, trimethylhexamethylene hexamethylenediamine 5%.

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Abstract

The invention discloses the application of a solvent-free two-component epoxy coating to joint wrapping anticorrosion of pipelines, and belongs to the field of coatings. The epoxy coating contains an aliphatic chain structure in the length of about 36 carbon atoms. When being used in the joint wrapping, the solvent-free two-component epoxy coating coats on the surface of a three-layer polyethylene coating and heated under high temperature of 120 to 260 DEG C for 20 s-20 min. The epoxy coating can form a fusion bonding with the three-layer polyethylene coating, so as to enhance the initial adhesion stress and durable adhesion stress between coatings.

Description

technical field [0001] The invention relates to the field of coatings, in particular to the application of a solvent-free two-component epoxy coating in pipeline joint anticorrosion, which can form a fusion bond with a three-layer polyethylene anticorrosion coating on the outside of buried long-distance pipelines, improving the The quality of mouth filling and anticorrosion. Background technique [0002] Most of the oil and gas pipelines use three-layer polyethylene anti-corrosion coating. In the connection area of ​​the pipeline, the three-layer polyethylene anti-corrosion treatment is generally not carried out, but the joint anti-corrosion treatment is carried out at the construction site. Among the existing various joint coatings, solvent-free two-component epoxy coatings are developing rapidly because of their advantages such as simple coating process, easy repair, reliable inspection results, and no cathodic protection current shielding. [0003] At present, solvent-fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D163/04C09D5/08C08G59/64
CPCC08G59/64C08K2201/014C08L2205/02C08L2205/025C08L2205/035C09D5/08C09D7/61C09D7/65C09D163/00C08L63/04C08L67/00C08L83/04C08K2003/327C08K3/04C08K3/34C08K2003/3045
Inventor 刘强徐昌学白树彬孙玉伟李建忠
Owner BC P INC CHINA NAT PETROLEUM CORP
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