Low-temperature fast-curing anti-hydrogen sulfide solvent-free coating for pipelines and preparation method thereof

A solvent-free coating and rapid curing technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as insufficient high temperature and high pressure resistance, failure to protect oil well pipe threads, and inadaptability to chemical environments, etc., to achieve reduction The use of ventilation equipment, excellent soil acid corrosion resistance, and the effect of eliminating pinholes

Active Publication Date: 2015-11-18
SHANGHAI HILONG SHINE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For now, the disadvantages of anti-hydrogen sulfide inner coatings for pipelines are mainly: the coating has low binding force, cannot protect oil well pipe threads, and is not suitable for harsh chemical environments; in addition, it is easy to age and resist high temperature and pressure shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A method for preparing a low-temperature fast-curing hydrogen sulfide-resistant solvent-free coating for pipelines, the specific steps of which are:

[0076] (1) Ingredients

[0077] Contains component A and component B, the mass percentage of each component raw material is:

[0078] Component A:

[0079] Novolac epoxy resin 20.0%, adopts the resin of Taiwan Nanya Company model as NPPN-631;

[0080] Hydrogenated bisphenol A epoxy resin 10.0%, adopts the resin that CVC company model is EPALLOY5000;

[0081] Active toughening resin 12.0%, is the novolac epoxy resin of the liquid elastomer modification high functionality of high acrylonitrile content, adopts the resin that CVC company model is HyPoxRF928;

[0082] Carboxyl-terminated nitrile rubber 5.0%, adopting the resin of CVC company model as CTBN1300X8;

[0083] Reactive diluent 6.0%, adopt the multifunctional glycidyl ether resin produced by Shanghai Resin Factory;

[0084] The leveling agent is 0.2%, and the pr...

Embodiment 2

[0109] A method for preparing a low-temperature fast-curing hydrogen sulfide-resistant solvent-free coating for pipelines, the specific steps of which are:

[0110] (1) Ingredients

[0111] Contains component A and component B, the mass percentage of each component raw material is:

[0112] Novolac epoxy resin 35.0%;

[0113] Hydrogenated bisphenol A epoxy resin 5.0%;

[0114] Active toughening resin I6.0%;

[0115] Carboxyl-terminated nitrile rubber 1.0%;

[0116] Glycerol diglycidyl ether 3.0%;

[0117] Leveling agent 0.5%;

[0118] Defoamer 0.2%;

[0119] Dispersant 0.8%;

[0120] Thixotropic agent 0.5%;

[0121] Zinc phosphate 5.0%;

[0122] ZAPP2.0%;

[0123] Aluminum tripolyphosphate 3.0%;

[0124] White ceramic powder 10.5%;

[0125] Barite powder 2.0%;

[0126] Component B ：

[0127] Curing agent 25.0%;

[0128] Curing accelerator 0.5%.

[0129] When the coating is used, component A and component B are used in combination at a mass ratio of A:B=4.0:1. ...

Embodiment 3

[0140] A method for preparing a low-temperature fast-curing hydrogen sulfide-resistant solvent-free coating for pipelines, the specific steps of which are:

[0141] (1) Ingredients

[0142] Contains component A and component B, the mass percentage of each component raw material is:

[0143] Novolac epoxy resin 30.0%;

[0144] Hydrogenated bisphenol A epoxy resin 8.0%;

[0145] Active toughening resin I4.0%;

[0146] Carboxyl-terminated nitrile rubber 4.0%;

[0147] Mixture of propylene oxide butyl ether and glycerol diglycidyl ether (1:1) 4.0%;

[0148] Leveling agent 0.3%;

[0149] Defoamer 0.3%;

[0150] Dispersant 0.6%;

[0151] Thixotropic agent 1.2%;

[0152] Zinc phosphate 8.0%;

[0153] ZAPP1.0%;

[0154] Aluminum tripolyphosphate 5.0%;

[0155] White ceramic powder 9.8%;

[0156] Barite powder 3.0%;

[0157] Component B ：

[0158] Curing agent 20.0%;

[0159] Curing accelerator 0.8%.

[0160] When the paint is used, component A and component B are used...

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Abstract

The low-temperature fast-curing hydrogen sulfide-resistant solvent-free coating for pipelines of the present invention is specially developed to prevent hydrogen sulfide corrosion, and includes components A and B, and component A contains novolac epoxy resin, hydrogenated bisphenol A epoxy resin, active Toughening resin I, reactive toughening resin II, reactive diluent, leveling agent, defoamer, dispersant, thixotropic agent, zinc phosphate, ZAPP, aluminum tripolyphosphate, white ceramic powder and barite powder; component B Contains curing agent and curing accelerator; components A and B are used in combination according to the mass ratio A:B=3.5~4.5︰1. The preparation steps of the paint include: ① batching; ② activation; ③ dispersion; ④ grinding; ⑤ filtering and packing. The coating of the present invention does not contain volatile solvents, can be used at 80°C, 20MPa pressure, and an environment containing 4 to 5% hydrogen sulfide, and can be cured rapidly in an environment lower than 5°C, and can be solidly dried within 48 hours. Good, has excellent soil acid corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of coatings in chemical technology, in particular to a low-temperature fast-curing hydrogen sulfide-resistant solvent-free coating for pipelines and a preparation method thereof. Background technique [0002] In hydrogen sulfide (H 2 During the exploitation of oil and gas fields with high S) content, the pipes used will be corroded by sulfur-containing natural gas, which poses a serious threat to the safe production of oil and gas fields. Many studies have shown that dry H 2 S is non-corrosive, only when hydrogen sulfide (H 2 S) When the gas contains a certain amount of water vapor, it will show its corrosiveness. If carbon steel or low alloy steel is exposed to an environment containing hydrogen sulfide, hydrogen intrusion into the steel due to corrosion can cause hydrogen induced cracking (HIC). At this time, hydrogen bubbling will appear on the surface of the steel, and sulfide stress corrosion cracki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/04C09D163/02C09D7/12C09D5/08
Inventor 丁武斌孙健李芳杜传芹
Owner SHANGHAI HILONG SHINE NEW MATERIAL
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