Preparation method of strong-acid-resistant epoxy resin quick plugging agent

A technology of acid epoxy resin and epoxy resin, which is applied in the direction of epoxy resin glue, chemical instruments and methods, adhesives, etc., can solve the problems of plugging agent application limitations, poor material compatibility, poor compatibility, etc., and achieve rapid Strong curing ability, good resistance to strong acid, high adhesion effect

Active Publication Date: 2013-05-22
BEIJING INST OF AEROSPACE TESTING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some leakage locations that are not easy to clamp, the application of this type of plugging agent is greatly limited
The second category is organic adhesives, such as resin-type polyacrylate, epoxy resin, rubber-type styrene-butadiene rubber, butyl rubber, silicone rubber, etc. This type of plugging agent has a strong adhesion to the matrix, but it is not compatible with Poor material compatibility with strong corrosive media such as strong acids
Compared with other organic plugging agents, epoxy resin plugging agent has the advantages of higher adhesion, better chemical resistance, wide service temperature, low shrinkage rate, and can be used in combination with other modifiers, but The material compatibility with strong corrosive media such as concentrated nitric acid and concentrated sulfuric acid is still poor. Currently, acid-resistant epoxy resin plugging agents on the market generally break and decompose within 3 hours of immersion in strong acid. Therefore, the developed A plugging agent with high adhesion to metal substrates, good compatibility with strong acid media such as concentrated nitric acid, concentrated sulfuric acid, concentrated hydrochloric acid, and fast curing at room temperature is imperative

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix 20 grams of epoxy resin HyPox DA323, 30 grams of tetrafunctional epoxy resin (TGDDM), 5 grams of liquid nitrile rubber, 6 grams of silica powder, 1 gram of carbon black, and 0.3 grams of asbestos powder, and mix them into Group A points; 10 grams of polythiol EH-316, 5 grams of 2,2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane (BAHPFP), 1 gram of DMP-30, 5 grams of KH-550 silane The joint agent, 5 grams of silicon dioxide powder, and 1 gram of titanium dioxide were stirred evenly and mixed into component B. When in use, mix components A and B uniformly at a ratio of 1:1, apply it on the metal plate, and press it on the leakage site for 1 minute to cure and seal the leakage point. Tested by GB / T 7124-2008 method, after the plugging agent is cured at room temperature for 1 hour, the tensile shear strength of aluminum alloy to aluminum alloy reaches 19.6MPa. The cured plugging agent samples were immersed in concentrated sulfuric acid, concentrated nitric acid and co...

Embodiment 2

[0015] Mix 30 grams of epoxy resin NPEL-144, 30 grams of four-functional epoxy resin (TGDDM), 5 grams of liquid polysulfide rubber, and 6 grams of alumina into component A; mix 20 grams of polythiol MP-2290, 5 grams 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (BAHPFP), 5 grams of KH-550 silane coupling agent, 5 grams of silicon dioxide powder, and 1 gram of titanium dioxide were mixed as component B. When in use, mix components A and B evenly at a ratio of 1:1, apply it on a metal plate, and press it on the leakage site for 1 minute to solidify and achieve the purpose of plugging. The tensile and shear strength of 304# steel to 304# steel reaches 24.9MPa after the plugging agent is cured at room temperature for 1 hour using GB / T 7124-2008 method. The cured plugging agent samples were immersed in concentrated sulfuric acid, concentrated nitric acid and concentrated hydrochloric acid respectively, and there was no obvious change after soaking for a week.

Embodiment 3

[0017] Mix 30 grams of epoxy resin E51, 10 grams of NPPN-631, 10 grams of NPCN-701, 5 grams of hydroxyl-terminated liquid nitrile rubber, and 6 grams of heavy calcium carbonate into component A; mix 20 grams of diethylenetriamine, 10 Gram 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane (BAHPFP), 5 grams of resorcinol, 5 grams of KH-570 silane coupling agent, 5 grams of silicon dioxide powder, 5 grams PTFE ultrafine powder is mixed as component B. When in use, mix components A and B uniformly at a ratio of 1:1, apply it on a metal plate, and press it on the leak for 2 minutes to solidify and achieve the purpose of plugging. Tested by GB / T 7124-2008 method, after the plugging agent is cured at room temperature for 1 hour, the tensile shear strength of aluminum alloy to aluminum alloy reaches 21.7MPa. After curing, the samples were immersed in concentrated sulfuric acid, concentrated nitric acid and concentrated hydrochloric acid respectively, and there was no obvious change ...

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Abstract

The invention relates to a preparation method of a strong-acid-resistant epoxy resin quick plugging agent. The plugging agent is composed of a component A and a component B, wherein the component A is composed of an epoxy resin, a toughener and a filler; and the component B is composed of a curing agent, a coupling agent, an accelerator and a filler. After the components A and B are mixed at normal temperature, the mixture can be quickly cured within 1-5 minutes. The cured plugging agent has excellent strong acid resistance and high adhesive force for metals, and is suitable for quick-adhesion plugging of leakage of pipelines, tanks, flanges and other devices using a strong acid medium.

Description

technical field [0001] The invention belongs to the technical field of leak plugging, and in particular relates to a preparation method of a strong acid-resistant epoxy resin rapid leak plugging agent. Background technique [0002] The plugging agent is a binder that directly isolates the leakage medium from the outside world. It needs to have excellent chemical stability, be able to withstand the use temperature, have good cohesive force, dense texture, strong impermeability, high strength after curing, and It can meet the requirements of rapid curing in technical operation. It has always been a difficult problem to solve some strong corrosive media such as concentrated nitric acid, concentrated sulfuric acid, concentrated hydrochloric acid and other media in the industry. At present, many units at home and abroad are competing to research and develop new leak-stopping agents in order to solve this problem. The plugging agents used in strong corrosive media such as concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09K3/10
Inventor 黄继庆刘江强程永喜孙海云方涛蒋榕培鲍世国索志勇汤崭王亚军游岳尚宇
Owner BEIJING INST OF AEROSPACE TESTING TECH
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