Self-repair coating with anticorrosion and antifouling double functions and method for preparing self-repair coating

A self-healing, dual-function technology, used in anti-corrosion coatings, anti-fouling/underwater coatings, coatings, etc., to achieve the effects of excellent film formation, high yield and wide application range

Inactive Publication Date: 2018-12-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no simpler and more efficient way to prepare s

Method used

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  • Self-repair coating with anticorrosion and antifouling double functions and method for preparing self-repair coating
  • Self-repair coating with anticorrosion and antifouling double functions and method for preparing self-repair coating
  • Self-repair coating with anticorrosion and antifouling double functions and method for preparing self-repair coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] At room temperature, add 120mL of distilled water to a 500mL flask, add 13.5g of gum arabic emulsifier, stir mechanically at 500rpm for 4 hours until the upper layer of foam and the lower layer are clear, then add 2.5g of urea, 0.25g of ammonium chloride, and 0.25g of resorcinol , adjust the pH of the mixture to 3.5; at the same time, dissolve 2.7g DCOIT in 27g isophorone diisocyanate, and disperse evenly by ultrasonication. Then, add 4g Bayer Desmodur L75 to a 500mL two-necked flask, and mix with 4mL ethyl acetate under nitrogen atmosphere Stir evenly for 10 minutes, then add 27g of isophorone diisocyanate and stir until the two are evenly mixed, then slowly pour the premixed emulsifier mixture into the flask, emulsify at 1100rpm for 10min, add 6.33g of formaldehyde with a mass fraction of 37% Aqueous solution, heated to 55°C, reacted for 3 hours, cooled to room temperature after the reaction, decanted and separated, repeated three times with distilled water, dried at r...

Embodiment 2

[0065] At room temperature, add 120mL of distilled water to a 500mL flask, add 15g of polyvinyl alcohol, stir mechanically at 90°C for 4 hours until it becomes transparent, then add 2.5g of urea, 0.25g of ammonium chloride, and 0.25g of resorcinol in sequence to adjust the mixture pH to 3.5; at the same time, dissolve 10g DCOIT in 20g isophorone diisocyanate, ultrasonically disperse evenly, then add 4g hexamethylene diisocyanate prepolymer in a 500mL two-necked flask, and mix with 4mL acetone under nitrogen atmosphere Stir, then add the above-mentioned mixture of isophorone diisocyanate and DCOIT and stir until uniformly mixed, then slowly pour the premixed emulsifier into the flask, emulsify at 1100rpm for 10min, add 6.5g of formaldehyde solution with a mass fraction of 37% , heated to 55°C, reacted for 3 hours, cooled to room temperature after the reaction, decanted and separated, repeated three times with distilled water, dried at room temperature, then sieved, sealed and st...

Embodiment 3

[0069] At room temperature, add 120mL of distilled water to a 500mL flask, add 20g of sodium dodecylbenzenesulfonate, stir until completely dissolved, then add 2.5g of urea, 0.25g of ammonium chloride, and 0.25g of resorcinol in sequence to adjust the mixture pH to 3.5; at the same time, dissolve 10g of chlorothalonil in 20g of 4,4'-dicyclohexylmethane diisocyanate, and disperse evenly by ultrasonic, then slowly add the emulsifier solution to the mixture of isocyanate and DCOIT, and stir until uniformly mixed , emulsified at 900rpm for 10min, added 10g of formaldehyde solution with a mass fraction of 37%, ultrasonicated in an ice bath for 15min, heated to 55°C, and reacted for 4 hours. After the reaction, cooled to room temperature, poured and separated, repeated three times with distilled water, and dried at room temperature Then sieve and store in a vacuum desiccator.

[0070] Disperse the microcapsules in a certain amount of distilled water, add a certain amount of DISPERBY...

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Abstract

The invention belongs to the field of marine anticorrosion and antifouling technologies, and particularly relates to a self-repair coating with anticorrosion and antifouling double functions and a method for preparing the self-repair coating. The method includes preparing macromolecular micro-capsules with loaded environment-friendly antifouling agents and self-repair reagents; adding dispersing auxiliaries into the macromolecular micro-capsules and dispersing the micro-capsules in resin to obtain the self-repair coating. The self-repair coating and the method have the advantages that the micro-capsules can be ruptured to release the self-repair reagents and the environment-friendly antifouling agents in the micro-capsules when the self-repair coating is damaged, accordingly, micro-crack can be repaired, and microorganisms can be stopped from being attached to the micro-crack; the self-repair coating can have the self-repair anticorrosion and antifouling functions by the aid of high value-added effects of the micro-capsules as compared with the traditional self-repair anticorrosion coatings, and the loaded antifouling agents are environmentally friendly and are high in efficiency and broad in spectrum; raw materials for the self-repair coating are inexpensive and are easily available, synthesis procedures are easy to control, special conditions or equipment can be omitted, themethod is high in yield, and obvious self-repair anticorrosion and antifouling effects can be realized by the self-repair coating.

Description

technical field [0001] The invention belongs to the technical field of marine anti-corrosion and anti-fouling, and in particular relates to a self-repairing coating with dual functions of anti-corrosion and anti-fouling and a preparation method thereof, in particular to a method of simultaneously coating an environmentally friendly anti-fouling agent and a self-repairing coating with microcapsules. A self-healing anti-corrosion and anti-fouling coating of a repairing agent and a preparation method thereof. Background technique [0002] Ocean corrosion and biofouling are major threats to ocean development. There are many cases of catastrophic accidents caused by marine corrosion, resulting in extremely huge losses. However, biofouling increases the navigation resistance and fuel consumption of the hull, blocks the seawater transmission pipeline, and increases operating costs, etc., which are the technical bottlenecks that restrict the development of the marine economy and ma...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D5/16C08G18/75C08G12/12
CPCC08G12/12C08G18/755C08L2205/03C08L2205/18C09D5/08C09D5/1625C09D163/00C08L75/04C08L61/24
Inventor 李国良宋妍刘媛齐涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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