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Self-repairing anticorrosive polyurethane coating and preparation method thereof

An anti-corrosion coating and polyurethane technology, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as the combination of self-healing mechanisms, and achieve the effects of good anti-corrosion effect, excellent self-healing performance and simple preparation process.

Active Publication Date: 2019-10-15
刘军
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  • Claims
  • Application Information

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Problems solved by technology

Although the material design is clever, the two self-healing mechanisms are not combined

Method used

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  • Self-repairing anticorrosive polyurethane coating and preparation method thereof
  • Self-repairing anticorrosive polyurethane coating and preparation method thereof

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Embodiment Construction

[0016] The specific technical solutions of the present invention are described in conjunction with the examples.

[0017] Polypropylene glycol (PPG), isophorone diisocyanate (IPDI), and dimethylolpropionic acid (DMPA) were vacuum-dried at 110±2°C for 12 hours. Under the protection of dry nitrogen, 100 parts of PPG, 0.5 parts of IPDI and 5 parts of DMPA were used to prepare prepolymers in a three-necked flask under the action of a catalyst at 55 °C; the first-level coating of waterborne polyurethane was synthesized by chain extension and emulsification processes. The tested emulsion is a milky white stable emulsion with excellent thermal performance parameters. Using 10 parts of tetraethoxy silicon orthosilicate (TEOS) as the wall material, 4 parts of linseed oil as the core material, and 18 parts of polydopamine as the nano-valve, the nano-silicon microspheres were synthesized.

[0018] Through scanning electron microscope analysis, the surface of the microspheres is smooth a...

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Abstract

The invention provides a self-repairing anticorrosive polyurethane coating. PPG, IPDI and DMPA are used as main raw materials to synthesize waterborne polyurethane; nano-silicon microspheres are designed and synthesized by using an encapsulation technology with TEOS as a wall material, linseed oil as a core material and polydopamine as a nano-valve; the nano-silicon microspheres are added to the waterborne polyurethane to prepare a primary repairing coating layer; and PPG, IPDI, DMPA, Di-Se and GO are used as main raw materials to synthesize a double-selenium-based waterborne polyurethane / GO secondary repairing coating layer. The polyurethane coating of the invention has the advantages of excellent self-repairing property, good anticorrosion effect, harmlessness to the human body, and no pollution to the environment; and a preparation method of the self-repairing anticorrosive polyurethane coating has the advantages of simplicity and low cost.

Description

technical field [0001] The invention belongs to the technical field of self-repairing polyurethane anticorrosion coatings, and in particular relates to a self-repairing polyurethane anticorrosion coating and a preparation method thereof. Background technique [0002] Corrosion of materials can have a serious impact in areas such as the transportation industry, cement and concrete manufacturing, metal processing and power generation equipment. The annual worldwide cost of material corrosion is estimated to exceed 3% of global GDP. The global anti-corrosion coatings market share is expected to reach USD 31 billion in 2022. Adapting to today's environmental demands, waterborne polyurethane (WPU) coatings have seen a significant increase in market share over the past few decades. With the wide application of WPU, how to make it safer, more reliable, more durable, and easier to maintain has become an important subject research direction. Polymer coatings with self-healing capa...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/08C09D7/65C09D7/61
CPCC09D5/08C09D175/08C09D7/61C09D7/70C08L83/04C08L91/00C08L79/04C08K3/042
Inventor 刘军卓玉国卓巾茗
Owner 刘军
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