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Solvent-free epoxy self-repairing anticorrosive coating as well as preparation method and application thereof

An anti-corrosion coating and self-repairing technology, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, fire-proof coatings, etc., can solve the extremely high requirements for coating resistance to cathodic disbondment, poor cathodic disbondment resistance of coatings, and shorten the service life of coatings and other problems, to achieve the effect of improving cathodic disbonding resistance, improving anti-corrosion ability, and improving wear resistance

Inactive Publication Date: 2021-04-13
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phenolic epoxy coating is brittle and has poor impact resistance, and it is prone to scratches during transportation and installation, resulting in damage to the coating, which reduces the service life of the coating
At present, solvent-based epoxy coatings are mainly used, which will emit a large amount of VOC during the drying process of the coating film, causing environmental pollution and waste of resources.
Moreover, the outside of the bushing needs to be matched with the applied current cathodic protection, which requires extremely high cathodic disbonding resistance of the coating, and the cathodic disbonding resistance of the coating in the prior art is not good;

Method used

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  • Solvent-free epoxy self-repairing anticorrosive coating as well as preparation method and application thereof
  • Solvent-free epoxy self-repairing anticorrosive coating as well as preparation method and application thereof
  • Solvent-free epoxy self-repairing anticorrosive coating as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0036] The raw materials for the preparation of component A include, in parts by weight: 100 parts of novolac epoxy resin, 5-10 parts of graphene dispersion slurry, 10-15 parts of 128 epoxy resin capsules, 10-15 parts of T31 phenalkamine curing agent capsule, 0.5-1 part of corrosion inhibitor or corrosion inhibitor capsule, pigments and fillers, 1-3 parts of defoamer, 1-3 parts of dispersant and 1-3 parts of leveling agent;

[0037] The B component is a polyamide curing agent;

[0038] In this embodiment,

[0039] 100 parts novolac epoxy resin and polyamide curing agent: the combination of novolac epoxy resin (higher functionality) and polyamide curing agent (lower viscosity and better flexibility) makes the coating have the characteristics of traditional solvent-based novolac epoxy coatings. Good chemical stability, heat resistance, acid resistance, alkali resistance, wear resistance, etc., also has good flexibility, impact resistance, low VOC emissions and good construction...

Embodiment 1

[0082] Embodiments of the present invention provide a solvent-free epoxy self-healing anti-corrosion coating and a preparation method thereof, the method comprising:

[0083] 1. Put 100 parts of novolac epoxy resin into a 40°C oven for 5 hours to preheat to obtain preheated novolac epoxy resin;

[0084] 2. Put 5 parts of polytetrafluoroethylene powder, 70 parts of talc powder, 20 parts of silicon micropowder, 25 parts of aluminum tripolyphosphate, 60 parts of mica powder and 1 part of pottery clay in a high-temperature box at 150°C for the second time Heating for 12 hours to obtain paint pigments and fillers;

[0085] 3. Mix the preheated novolac epoxy resin, 2.5 parts of defoamer, 2.5 parts of dispersant, and 1.5 parts of leveling agent and stir at room temperature, add the paint pigment and filler while stirring, and continue stirring at high speed 30 to 40 minutes to disperse the components evenly, then grind for 0.5 to 1 hour with a grinder, and finally add 15 parts of 12...

Embodiment 2

[0089] Embodiments of the present invention provide a solvent-free epoxy self-healing anti-corrosion coating and a preparation method thereof, the method comprising:

[0090] 1. Put the novolac epoxy resin into a 40°C oven for 5 hours to preheat to obtain preheated novolac epoxy resin;

[0091] 2. Put 3 parts of polytetrafluoroethylene powder, 65 parts of talc powder, 25 parts of silicon micropowder, 10 parts of aluminum tripolyphosphate, 40 parts of mica powder and 0.7 parts of clay in a high-temperature box at 150 ° C for the second time Heating for 12 hours to obtain paint pigments and fillers;

[0092] 3. Mix 100 parts of the preheated novolac epoxy resin, 3 parts of defoamer, 3 parts of dispersant, and 1 part of leveling agent, then stir at room temperature, add paint pigments and fillers while stirring, and continue stirring at high speed 30 to 40 minutes to disperse the components evenly, then grind for 0.5 to 1 hour with a grinder, and finally add 10 parts of 128 epox...

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Abstract

The embodiment of the invention discloses a solvent-free epoxy self-repairing anticorrosive paint as well as a preparation method and application thereof. The paint comprises a component A and a component B. The component A is prepared from the following raw materials in parts by weight: 100 parts of novolac epoxy resin, 5-10 parts of graphene dispersion slurry, 10-15 parts of 128 epoxy resin capsules, 10-15 parts of T31 novolac amine curing agent capsules, 0.5-1 part of corrosion inhibitor or corrosion inhibitor capsules, 150-200 parts of a pigment and filler, 1-3 parts of a defoamer, 1-3 parts of a dispersant and 1-3 parts of a leveling agent; and the component B is a polyamide curing agent. According to the embodiment of the invention, all the components cooperate with one another, and a coating formed by the finally obtained solvent-free epoxy self-repairing anticorrosive paint has excellent temperature resistance, pressure resistance, medium corrosion resistance and self-repairing function performance, and can be used for corrosion prevention in a petroleum casing pipe.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of anti-corrosion coatings, in particular to a solvent-free epoxy self-repairing anti-corrosion coating and its preparation method and application. Background technique [0002] Anti-corrosion coating refers to a type of liquid or solid material that can form a thin film on the surface of an object under certain conditions for protection, decoration or other special functions (insulation, rust prevention, mildew resistance, heat resistance, etc.). Because most of the early paints used vegetable oil as the main raw material, they are also called paints. Now synthetic resins have mostly or completely replaced vegetable oils, so they are called paints. There are three main functions: protection, decoration, and concealing the defects of the product to enhance the value of the product. [0003] The harsh environment of oil casing at home and abroad is mainly manifested in: high temper...

Claims

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Application Information

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IPC IPC(8): C09D163/04C09D163/00C09D5/08C09D7/61C09D7/65C08G59/44C08G59/62B05D7/00B05D7/16B05D7/26
CPCB05D7/00B05D7/16B05D7/26B05D2202/15B05D2203/30B05D2504/00B05D2505/00B05D2601/04B05D2601/20B05D2602/00C08G59/44C08G59/621C08K2003/327C08L2201/08C08L2203/18C08L2205/035C09D5/08C09D5/18C09D163/00C09D163/04C09D7/61C09D7/65C08L63/00C08L27/18C08L35/06C08K3/34C08K3/36C08K3/32C08K9/10C08K3/042C08K5/405C08K13/06
Inventor 石家烽郭晓军韩忠智崔灿灿王磊丁超康绍炜孙肇兴刘本华段绍明
Owner BC P INC CHINA NAT PETROLEUM CORP
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