A dicyclocene cobalt cation-based water-based polyurethane and corrosion inhibitor system and preparation method

It is a kind of dicene cobalt anode and water-based technology, which is applied in the field of chemical anti-corrosion, which can solve environmental pollution and other problems, and achieve the effect of high-efficiency polymerization and anti-corrosion

Active Publication Date: 2021-10-22
西北工业大学太仓长三角研究院 +1
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Problems solved by technology

Some inorganic heavy metal salt corrosion inhibitors have good corrosion inhibition effect, but their discharge will cause pollution to the environment; polymer corrosion inhibitors are easy to form a single or multi-layer dense protective film on the surface of the substrate, so they are relatively low-molecular corrosion inhibitors. It has the advantages of high efficiency, durability, and environmental protection, and has become one of the research hotspots in the field of corrosion inhibitors.

Method used

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  • A dicyclocene cobalt cation-based water-based polyurethane and corrosion inhibitor system and preparation method
  • A dicyclocene cobalt cation-based water-based polyurethane and corrosion inhibitor system and preparation method
  • A dicyclocene cobalt cation-based water-based polyurethane and corrosion inhibitor system and preparation method

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preparation example Construction

[0050] The preparation method of the dihydrocene cobalt cation derivative represented by general formula I, according to figure 1 The compound reacts according to the specified route to obtain one of the following general formulas:

[0051]

[0052] Where: R=-C 6 h 12 ,-C 7 h 6 ,-C 10 h 18 ,-C 13 h 22 .

Embodiment 1

[0053] Embodiment 1: when R=-C 6 h 12 , Preparation of X=Cl

[0054] Dissolve 1 to 5 parts of trimethylsilyl-protected ethynyl cobaltocene hexafluorophosphate and 1 to 10 parts of bis-azido-neopentyl glycol in 20 to 50 mL of anhydrous acetonitrile, and purify oxygen with nitrogen for 30 minutes to obtain solution A ; At the same time, add 0.1 to 1.2 parts of catalyst in another round-bottomed flask, pass nitrogen to remove oxygen for 5-60min, and obtain solution B; the catalyst is CuI or CuBr; then solution A is transferred to solution B under nitrogen protection , after 5-30min, add 1-20 parts of finely ground anhydrous potassium carbonate K 2 CO 3 , react for 10-48 hours under the protection of nitrogen at 25-90°C to obtain a suspension; filter the reacted suspension, wash with acetonitrile, and then concentrate by rotary evaporation to obtain a concentrated solution; add the concentrated solution dropwise to diethyl ether, collect the precipitate, and finally pass After...

Embodiment 2

[0063] The concentration of hydrochloric acid solution is 4.0mol / L, the dosage of hydrochloric acid solution is 150mL, the dosage of cobaltocene-based waterborne polyurethane (PU-HDI) is 20mg / L, and 10# steel is immersed in the acid solution at 25°C for 2-6 hours.

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Abstract

The invention relates to a cobaltocene-based water-based polyurethane, a corrosion inhibitor system and a preparation method. The triazole ring is used as a linking group to introduce an active functional group-alcohol hydroxyl group to the cobaltocene cation, and then through simple and convenient step-by-step Addition polymerization reaction and ion exchange reaction obtain the cobaltocene-based waterborne polyurethane, which realizes cheap synthesis and high-efficiency polymerization. Compared with the currently commonly used corrosion inhibitors, the target cobaltocene-based waterborne polyurethane has many advantages of inorganic, organic and polymer corrosion inhibitors. The product of the invention can be used as a corrosion inhibitor in practical applications such as pickling to slow down the corrosion of steel products by hydrochloric acid.

Description

technical field [0001] The invention belongs to the field of chemical anticorrosion, and relates to a cobaltocene-based waterborne polyurethane, a corrosion inhibitor system and a preparation method. Background technique [0002] Metals and their alloys are one of the most important structural materials, and their applications range from daily life to electrical and mechanical manufacturing to construction, military and other fields. With the rapid development of my country's economy, the domestic demand for metal materials and steel is also rising rapidly. However, metal materials such as iron and steel, which are industrial skeletons, have serious corrosion problems. For example, in the shipbuilding industry, the exterior of the hull is exposed to serious corrosion if it is soaked in seawater for a long time; various transportation pipelines in the petrochemical industry also face serious corrosion problems due to long-term exposure to some chemicals. Corrosion in a broa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/32C23F11/00
CPCC08G18/3897C08G18/73C08G18/755C08G18/758C08G18/7614C23F11/00
Inventor 颜静闫毅李学装张军平关昊
Owner 西北工业大学太仓长三角研究院
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