A kind of acrylate anticorrosion coating liquid which can be repaired automatically in sodium chloride aqueous solution and its preparation method and application

A technology of sodium chloride aqueous solution and acrylates, which is applied in the preparation of anti-corrosion coating liquid, intelligent anti-corrosion coating liquid and its preparation field, which can solve the problem of product protection and decoration discount, damage that cannot be repaired in time, and coating protection Function reduction and other problems, to achieve the effect of easy control of synthesis process, low cost and high transparency

Active Publication Date: 2019-08-16
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional anti-corrosion coatings have limitations. When the coating covering the surface of the metal substrate is damaged and cracked, the metal substrate is exposed, the protective function of the coating is reduced, and the corrosion rate of the metal is accelerated.
[0003] As the outer protective and decorative material of the product, the coating will inevitably be damaged by rubbing, scratching, scratching, etc. during the use of the product. Most of the damage cannot be repaired in time, so that its protective and decorative effect on the product is greatly reduced.

Method used

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  • A kind of acrylate anticorrosion coating liquid which can be repaired automatically in sodium chloride aqueous solution and its preparation method and application
  • A kind of acrylate anticorrosion coating liquid which can be repaired automatically in sodium chloride aqueous solution and its preparation method and application
  • A kind of acrylate anticorrosion coating liquid which can be repaired automatically in sodium chloride aqueous solution and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Preparation of an acrylic anticorrosion coating that can be automatically repaired in aqueous sodium chloride solution

[0037] 1) Preparation of dopamine methacrylamide

[0038] Take by weighing 14.7g (77.7mmol) dopamine hydrochloride and be dissolved in 450ml water, then add borax decahydrate (Na 2 B 4 o 7 10H 2 O), stirred evenly under nitrogen protection at 0°C, and then gradually added 9ml (93.12mmol) of methacryloyl chloride dropwise in 10min using a constant pressure funnel. After reacting for 2 hours, stop the reaction and use Na 2 CO 3 Adjust the pH above 9.5. Then use acetic acid to adjust the pH value to 2, extract with ethyl acetate, take the organic phase part, anhydrous MgSO 4 Drying and removal of the solvent gave the crude product, which was recrystallized in ethyl acetate at -20°C and dried to give the fine product of dopamine methacrylamide in about 45% yield. The spectrogram of the H NMR spectrum of dopamine methacrylamide is as f...

Embodiment 2

[0044] Embodiment 2 Preparation of an acrylic anticorrosion coating that can be automatically repaired in aqueous sodium chloride solution

[0045] 1) Prepare dopamine methacrylamide functional monomer according to the same method as in Example 1, and set aside.

[0046] 2) Preparation of n-butyl acrylate, n-butyl methacrylate and dopamine methacrylamide terpolymer

[0047] in N 2 Under protection, weigh n-butyl acrylate 1.28g (10mmol), n-butyl methacrylate 1.41g (10mmol), dopamine methacrylamide 0.88g (4mmol) (the molar ratio of the three monomers is 5:5: 2) Put it into a polymerization bottle, dissolve it with 15g of dimethyl sulfoxide, add 1wt% (0.186g) of dimethyl azobisisobutyrate as an initiator, and then put the polymerization bottle into a constant temperature pot at 60°C for reaction 24h. The reaction mixture was washed three times with cyclohexane precipitation, and dried in a vacuum oven at 55°C.

[0048] 3) Dissolve 1 g of the terpolymer obtained in step 2) in ...

Embodiment 3

[0050] Embodiment 3 Preparation of an acrylic anticorrosion coating that can be automatically repaired in aqueous sodium chloride solution

[0051] 1) Prepare dopamine methacrylamide functional monomer according to the same method as in Example 1, and set aside.

[0052] 2) Preparation of n-butyl acrylate, n-butyl methacrylate and dopamine methacrylamide terpolymer

[0053] in N 2 Under protection, take 1.28g (10mmol) of n-butyl acrylate, 2.1g (15mmol) of n-butyl methacrylate, and 0.55g (2.5mmol) of dopamine methacrylamide. The molar ratio of these three monomers is 4:6: 1 Put it into a polymerization bottle, dissolve it with 15g of N,N-dimethylformamide, add 1wt% (0.189g) of azodicyclohexylcarbonitrile as an initiator, and then put the polymerization bottle into a constant temperature pot at 60°C Reaction 24h. The reaction mixture was washed three times with cyclohexane precipitation, and dried in a vacuum oven at 55°C.

[0054] 3) Dissolve 1 g of the terpolymer obtained ...

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Abstract

The invention discloses an acrylic anticorrosive coating liquid capable of being automatically repaired in an aqueous solution of sodium chloride as well as a preparation method and application thereof and belongs to the field of corrosion prevention of metals. The coating liquid disclosed by the invention is composed of a terpolymer prepared by carrying out a copolymerization reaction on n-butyl acrylate, n-butyl methacrylate and dopamine methacrylamide, and a solvent, wherein a molar ratio of the three monomers such as the n-butyl acrylate, n-butyl methacrylate and dopamine methacrylamide is (3-6) to (2-6) to (1-2). The anticorrosive coating liquid disclosed by the invention is mainly used for preparing an anticorrosive coating of metallic or non-metallic materials in brine. Experiments prove that the acrylic coating disclosed by the invention is capable of being automatically repaired in a 5% of aqueous solution of sodium chloride, has the advantages of being high in matrix adhesion force, excellent anticorrosive property, excellent decorative property and the like, is simple and convenient in molding process, low in technical requirements and applicable to preparation of surface coatings of various organic (various resins), inorganic (ceramic and glass), metal and other materials.

Description

technical field [0001] The invention relates to a preparation method of an anti-corrosion coating liquid, in particular to an intelligent anti-corrosion coating liquid which can be automatically repaired in an aqueous sodium chloride solution, a preparation method and an application thereof, and belongs to the field of metal corrosion protection. Background technique [0002] The direct economic loss caused by metal corrosion in the world is about 700 billion US dollars every year, and the loss caused by metal corrosion accounts for 5% of the gross national product (GNP) in China. The survey and analysis report of the American Society of Corrosion Engineers in 2009 pointed out that the annual direct economic loss caused by corrosion accounts for about 4.27% of the gross domestic product (GDP). Corrosion of metal materials pervades all fields of the national economy, not only causing a huge waste of resources, but also causing a series of social problems such as environmental...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/08C09D133/10C09D5/08C08F220/18C08F220/58C07C231/02C07C233/20
CPCC07C231/02C08F220/18C08F220/1804C09D5/08C09D133/08C09D133/10C07C233/20C08F220/58C23F11/173
Inventor 黄继军唐艺峰宋盛菊
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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