Self-healing capsule, self-healing anticorrosion coating, preparation method and application thereof

An epoxy anti-corrosion coating and self-repairing technology, which is applied in the field of materials, can solve the problems of self-repairing reliability that needs to be improved, and the fluidity of the capsule core is not considered, so as to inhibit the reaction between the metal substrate and the corrosive medium and avoid the self-repairing function Sharp decay, easy-to-prepare effects

Active Publication Date: 2022-04-29
NINGBO DADA CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, CN101541416B discloses the principle and preparation method of a self-healing capsule, but the problem of fluidity of the capsule core at low temperature is not considered, and the actual user’s self-healing reliability needs to be improved

Method used

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  • Self-healing capsule, self-healing anticorrosion coating, preparation method and application thereof
  • Self-healing capsule, self-healing anticorrosion coating, preparation method and application thereof
  • Self-healing capsule, self-healing anticorrosion coating, preparation method and application thereof

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preparation example Construction

[0042] The embodiment of the present invention also provides a preparation method of the self-healing capsule, which includes:

[0043] At least mix liquid hydrocarbons, oil-soluble corrosion inhibitors, and polyamine compounds uniformly to form a capsule core mixture;

[0044] uniformly dispersing the capsule core mixture in the liquid epoxy resin in the form of an emulsion dispersion to obtain a capsule core dispersion;

[0045] At least polyisocyanate compound is added to the capsule core dispersion, so that the polyisocyanate compound reacts with part of the polyamine compound in the capsule core mixture at the interface of the capsule to form a polyurea film as the capsule wall.

[0046] Further, the preparation method includes: reacting the polyisocyanate compound and part of the polyamine compound in the capsule core mixture at the interface of the capsule at 0-100° C. under normal pressure to form a polyurea film as the capsule wall.

[0047] Further, the preparation ...

manufacture example 1

[0090] Manufacturing example 1, the preparation of capsule compound A-1 (the consumption of each component raw material as follows is in parts by mass, the same below):

[0091] Put 95 parts of naphthenic oil (KN4010, Karamay Chemical), 4 parts of dodecyl phosphonate, 1 part of D230 polyether amine (amine equivalent of 122, Huntsman Chemical) into the mixing tank and stir evenly to form a capsule core The mixture is filtered and packaged for subsequent use;

[0092] Put 50 parts of E51 epoxy resin into the dispersion kettle, add 50 parts of the above-mentioned capsule core mixture while dispersing, after feeding, disperse at a high speed for 0.5h at 45°C to obtain the capsule core dispersion;

[0093] Add 1.3 parts of TDI curing agent (W6875A, Wanhua Chemical, TDI prepolymer, NCO content 14.2%) to the dispersion kettle under stirring conditions, and make the TDI curing agent and capsule core dispersion uniformly disperse to obtain capsule compound A-1, packed for spare.

manufacture example 2

[0094] Manufacturing example 2, preparation of capsule complex A-2:

[0095] Put 78 parts of polyisobutylene (molecular weight 1300, Korea Daelim Chemical), 20 parts of barium petroleum sulfonate, and 2 parts of 140 polyamide (amine equivalent 200, Shanghai Jiangqiao Chemical Factory) into the mixing tank and stir evenly to form a capsule core mixture, filter , packing spare;

[0096] Put 70 parts of E51 epoxy resin into the dispersion kettle, add 30 parts of the above-mentioned capsule core mixture while dispersing, after feeding, disperse at 60°C for 5 hours at a high speed to obtain the capsule core dispersion;

[0097] Add 0.7 parts of HDI trimer (HT-100, HDI trimer, NCO content 21.8%, Wanhua Chemical Industry) to the dispersion kettle under stirring conditions, and make the HDI trimer and capsule core dispersion uniformly dispersed Obtain Capsule Complex A-2 and pack it for later use.

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Abstract

The invention discloses a self-repairing capsule, a self-repairing anticorrosion coating, a preparation method and application thereof. The self-healing capsule includes a capsule core and a capsule wall, the capsule core includes liquid hydrocarbons, oil-soluble corrosion inhibitors and polyamine compounds, and the capsule wall includes polyurea. The self-repairing high-solid epoxy anti-corrosion coating provided by the present invention has easy-to-obtain raw materials, simple production process and easy preparation; the self-repairing epoxy anti-corrosion coating formed based on the self-repairing high-solid epoxy anti-corrosion coating provided by the embodiment of the present invention The self-healing capsules in the corrosion coating film (coating) have thermal stability, hydrolytic stability and low temperature fluidity.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a self-repairing capsule, a self-repairing anti-corrosion coating and a preparation method and application thereof, belonging to the field of material technology. Background technique [0002] For a long time, metal corrosion, as a safety and economic problem, has attracted the attention of various countries. Metal corrosion will not only cause serious economic losses, but also affect human health. According to the statistics of corrosion protection organizations, the annual economic loss caused by metal corrosion in my country accounts for about 4% of the gross national product, and the corrosion loss in my country exceeds 2 trillion, which is 4 times the loss of natural disasters; It is necessary to bear the corrosion loss of more than 1,000 yuan. In order to avoid the serious consequences of metal corrosion, people often use the most economical and effective anti-corrosion coatings...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D163/00B01J13/02
CPCC09D5/08C09D163/00C09D7/70B01J13/02
Inventor 刘栓孙立三郭小平李群陈旭杰辛亮陈志宇
Owner NINGBO DADA CHEM CO LTD
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